Question 1: A cat recovering from an ovariohysterectomy is shivering and has a rectal temperature of 96°F (35.6°C). The BEST immediate intervention is:

• Increase IV fluid rate to 20 mL/kg/hr
• Administer corticosteroids
• Apply active external warming and monitor temperature every 5 minutes (Correct answer)
• Administer a bolus of cold saline

Correct answer: Apply active external warming and monitor temperature every 5 minutes

Hypothermia is common post-operatively in cats; active warming with warm water blankets or forced-air warmers and frequent temperature monitoring is the correct response.

Question 2: When preparing an abdominal surgical site on a dog, the prep should extend at minimum how far from the planned incision line in each direction?

• 1 cm
• 5 cm
• Only to the drape line
• 10 cm (or to include a generous margin) (Correct answer)

Correct answer: 10 cm (or to include a generous margin)

A minimum 10 cm margin (or a generous margin extending well beyond the incision) is recommended to maintain a sterile field if retraction is needed.

Question 3: What is the primary mechanism of action of NSAIDs in veterinary patients?

• Antagonize histamine receptors
• Inhibit cyclooxygenase (COX) enzymes (Correct answer)
• Block opioid receptors
• Stimulate alpha-2 adrenergic receptors

Correct answer: Inhibit cyclooxygenase (COX) enzymes

NSAIDs reduce inflammation and pain by inhibiting COX-1 and/or COX-2 enzymes, decreasing prostaglandin synthesis.

Question 4: Which of the following anesthetic induction agents is well-known for causing a transient period of apnea, especially when administered as a rapid intravenous bolus?

• Propofol (Correct answer)
• Ketamine
• Tiletamine-zolazepam (Telazol®)
• Diazepam

Correct answer: Propofol

Propofol is a rapid-acting injectable anesthetic that commonly causes dose- and rate-dependent respiratory depression, which can manifest as apnea immediately following induction. Technicians should be prepared to intubate and provide positive pressure ventilation if necessary after its administration.

Question 5: A male cat is straining repeatedly at the litter box but producing only a few drops of bloody urine. This presentation is most suspicious for:

• Urinary incontinence
• Urethral obstruction (Correct answer)
• Feline idiopathic cystitis without obstruction
• Polyuria from chronic kidney disease

Correct answer: Urethral obstruction

Urethral obstruction presents as repeated straining with little to no urine output and is a life-threatening emergency in male cats.

Question 6: When calculating fluid therapy for a surgical patient, what is the standard intraoperative maintenance rate for a healthy dog?

• 25 mL/kg/hr
• 1–2 mL/kg/hr
• 5–10 mL/kg/hr (Correct answer)
• 15–20 mL/kg/hr

Correct answer: 5–10 mL/kg/hr

The standard intraoperative fluid rate for healthy dogs is 5–10 mL/kg/hr, adjusted for blood loss, hypotension, and individual patient factors.

Question 7: What is the primary advantage of using ultrasound over radiography when evaluating a splenic mass in a dog?

• No radiation exposure and faster results
• Lower cost
• Better soft tissue differentiation and vascularity assessment (Correct answer)
• No patient preparation required

Correct answer: Better soft tissue differentiation and vascularity assessment

Ultrasound provides superior soft tissue contrast and allows Doppler assessment of blood flow, helping distinguish cystic from solid masses and evaluate vascularity.

Question 8: A 5-year-old healthy beagle is undergoing a routine dental cleaning under general anesthesia with isoflurane. The veterinary technician notes the patient's heart rate has dropped to 50 bpm. Which of the following drugs would be the most appropriate to administer to treat this bradycardia?

• Glycopyrrolate (Correct answer)
• Hydromorphone
• Acepromazine
• Diazepam

Correct answer: Glycopyrrolate

Glycopyrrolate is an anticholinergic drug used to treat or prevent bradycardia by blocking the effects of the parasympathetic nervous system on the heart. It has a slower onset but longer duration than atropine, making it suitable for this scenario. Diazepam is a benzodiazepine for sedation/anxiety, hydromorphone is an opioid for pain, and acepromazine is a tranquilizer that can cause vasodilation, none of which directly treat bradycardia.

Question 9: Which anesthetic complication is MOST associated with brachycephalic breeds undergoing general anesthesia?

• Hyperthermia
• Hypoglycemia
• Prolonged QT interval
• Upper airway obstruction during recovery (Correct answer)

Correct answer: Upper airway obstruction during recovery

Brachycephalic breeds are predisposed to upper airway obstruction, especially during recovery, due to elongated soft palate, stenotic nares, and hypoplastic trachea.

Question 10: Which of the following is a common, and potentially serious, class-wide side effect of non-steroidal anti-inflammatory drugs (NSAIDs) in dogs?

• Alopecia
• Iatrogenic hyperadrenocorticism
• Gastrointestinal ulceration (Correct answer)
• Polyuria and polydipsia

Correct answer: Gastrointestinal ulceration

NSAIDs work by inhibiting cyclooxygenase (COX) enzymes, which reduces the production of prostaglandins. While this decreases inflammation and pain, it also reduces the production of prostaglandins that protect the stomach and intestinal lining. This can lead to gastrointestinal irritation, ulceration, and even perforation, which is a major risk associated with NSAID use.

Question 11: A urine specific gravity of 1.008–1.012 in a dog is classified as:

• Isosthenuria (Correct answer)
• Hyposthenuria
• Normosthenuria
• Hypersthenuria

Correct answer: Isosthenuria

Isosthenuria refers to urine specific gravity in the range of 1.008–1.012, which is similar to glomerular filtrate and indicates inadequate concentrating or diluting ability.

Question 12: A veterinarian prescribes phenobarbital for a 5-year-old dog diagnosed with idiopathic epilepsy. What is the primary mechanism of action for this drug?

• Enhancing the effect of the inhibitory neurotransmitter GABA (Correct answer)
• Blocking voltage-gated sodium channels
• Antagonizing glutamate receptors
• Inhibiting the reuptake of serotonin and norepinephrine

Correct answer: Enhancing the effect of the inhibitory neurotransmitter GABA

Phenobarbital, a barbiturate anticonvulsant, primarily works by potentiating the effect of gamma-aminobutyric acid (GABA), the main inhibitory neurotransmitter in the central nervous system. It binds to GABA-A receptors, which increases the duration of chloride channel opening, leading to hyperpolarization of the cell membrane and reduced neuronal excitability.

Question 13: A surgeon requests a non-absorbable, monofilament suture for skin closure on a cat, which will need to be removed in 10-14 days. Which of the following suture materials best fits this description?

• Nylon (e.g., Ethilon) (Correct answer)
• Polydioxanone (e.g., PDS)
• Polyglactin 910 (e.g., Vicryl)
• Surgical Gut (Chromic)

Correct answer: Nylon (e.g., Ethilon)

Nylon is a synthetic, non-absorbable monofilament suture commonly used for skin closure that requires later removal. Polyglactin 910 and Polydioxanone are both absorbable synthetic sutures, and Surgical Gut is an absorbable natural suture.

Question 14: What kVp range is typically used for thoracic radiography in a medium-sized dog?

• 100–120 kVp
• 40–50 kVp
• 55–65 kVp
• 70–85 kVp (Correct answer)

Correct answer: 70–85 kVp

Thoracic radiography in medium dogs typically uses 70–85 kVp to provide adequate penetration through the chest wall while maintaining sufficient contrast.

Question 15: Which of the following is a correct aseptic technique when opening a sterile package onto the sterile field?

• Peel back the wrapper and flip the item onto the field without touching the sterile interior (Correct answer)
• Place the entire package on the field and let the scrub tech open it
• Reach across the sterile field to place the item
• Drop the item from 12 inches above the field

Correct answer: Peel back the wrapper and flip the item onto the field without touching the sterile interior

The circulating nurse peels back the outer wrapper and presents or drops the sterile item onto the field without touching the sterile interior or reaching over the field.

Question 16: A reverse distributor is what?

• A supplier who resells returned pharmacy merchandise only
• A supplier who resells returned merchandise
• A Drug Enforcement Administration registered pharmacist who is authorized to sell items from their inventory to practitioners
• A Drug Enforcement Administration registrant authorized to receive unusable or unwanted controlled substances (Correct answer)

Correct answer: A Drug Enforcement Administration registrant authorized to receive unusable or unwanted controlled substances

Practitioners get rid of outdated, harmed, useless, and undesired controlled substances by giving them to a reverse distributor, a registered drug dealer with the Drug Enforcement Administration who is allowed to accept them. A list of authorized reverse distributors is provided by regional DEA field offices. For a period of two years, copies of the records attesting to the transfer and disposal must be kept.

Question 17: Which of the following best describes the term 'window width' in CT image display?

• The field of view diameter during image acquisition
• The range of Hounsfield units displayed as shades of gray (Correct answer)
• The slice thickness selected for reconstruction
• The brightness of the monitor displaying the image

Correct answer: The range of Hounsfield units displayed as shades of gray

Window width determines the range of HU values mapped to the grayscale display; a narrow window increases contrast while a wide window shows a broader range of densities.

Question 18: A patient undergoing general anesthesia develops bradycardia with a heart rate of 30 bpm. Which drug should be administered first?

• Atropine (Correct answer)
• Dobutamine
• Propranolol
• Lidocaine

Correct answer: Atropine

Atropine is the first-line anticholinergic agent used to treat anesthetic-induced bradycardia by blocking parasympathetic input to the heart.

Question 19: According to the RECOVER (Reassessment Campaign on Veterinary Resuscitation) guidelines, what is the recommended rate for chest compressions during cardiopulmonary resuscitation (CPR) in most dogs and cats?

• 80-100 compressions per minute
• 100-120 compressions per minute (Correct answer)
• 60-80 compressions per minute
• 120-150 compressions per minute

Correct answer: 100-120 compressions per minute

The RECOVER guidelines, which are the evidence-based standard for veterinary CPR, recommend a chest compression rate of 100-120 per minute for both dogs and cats. This rate is crucial for maintaining adequate blood flow to vital organs during cardiac arrest.

Question 20: A dog is prescribed phenobarbital for seizure control. Which organ function should be monitored every 6 months?

• Spleen
• Liver (Correct answer)
• Kidney
• Pancreas

Correct answer: Liver

Phenobarbital is hepatically metabolized and can cause hepatotoxicity with chronic use, so liver enzyme panels and bile acids should be monitored regularly.

Question 21: A dog's capnograph waveform shows an elevated baseline (above zero during inspiration). What does this indicate?

• Esophageal intubation
• Hypoventilation
• Endobronchial intubation
• CO2 rebreathing (Correct answer)

Correct answer: CO2 rebreathing

An elevated capnograph baseline indicates the patient is inhaling CO2, consistent with rebreathing due to exhausted CO2 absorbent or an incompetent expiratory valve.

Question 22: A dog's packed cell volume (PCV) is 18%. This result indicates:

• Anemia (Correct answer)
• Polycythemia
• Dehydration artifact
• Normal PCV

Correct answer: Anemia

The normal canine PCV is 37–55%; a value of 18% is well below this range and indicates significant anemia.

Question 23: Which of the following is a CONTRAINDICATION to the use of ketamine as the sole induction agent in cats?

• Dental prophylaxis
• Routine castration
• Hypertrophic cardiomyopathy (HCM) (Correct answer)
• Orthopedic surgery

Correct answer: Hypertrophic cardiomyopathy (HCM)

Ketamine increases heart rate and myocardial oxygen demand, which is dangerous in cats with hypertrophic cardiomyopathy (HCM) where the heart cannot compensate.

Question 24: What is the primary concern when administering xylazine to cattle compared to other species?

• Cattle require much higher doses than horses
• Cattle develop tachycardia instead of bradycardia
• Xylazine causes rumen stasis only in cattle
• Cattle are 10 times more sensitive to xylazine than horses (Correct answer)

Correct answer: Cattle are 10 times more sensitive to xylazine than horses

Cattle are approximately 10 times more sensitive to xylazine than horses, so doses must be drastically reduced to avoid profound sedation and cardiorespiratory depression.

Question 25: When positioning a patient for a VD (ventrodorsal) thoracic radiograph, the beam enters from:

• Ventral to dorsal (Correct answer)
• Left to right
• Dorsal to ventral
• Right to left

Correct answer: Ventral to dorsal

In a VD projection the X-ray beam enters the ventral (belly) side first and exits the dorsal side, with the patient in dorsal recumbency.

Question 26: Which drug is the antidote for acetaminophen toxicity in cats?

• N-acetylcysteine (Correct answer)
• Ethanol
• Vitamin K1
• Deferoxamine

Correct answer: N-acetylcysteine

N-acetylcysteine replenishes glutathione stores and is the antidote for acetaminophen toxicity, which causes methemoglobinemia and hepatotoxicity in cats.

Question 27: A 10-year-old male cat is presented to the emergency clinic for straining to urinate with no urine production for the past 12 hours. Upon examination, he is bradycardic (110 bpm), and his bladder is large and firm. Which of the following is the most immediate life-threatening concern for this patient?

• Life-threatening hyperkalemia (Correct answer)
• Severe bladder pain
• Post-renal azotemia
• Potential for bladder rupture

Correct answer: Life-threatening hyperkalemia

While azotemia, pain, and bladder rupture are all serious concerns, severe hyperkalemia (high potassium) is the most immediate threat to life. Urethral obstruction prevents the excretion of potassium, which leads to toxic levels in the blood, causing severe bradycardia and potentially fatal cardiac arrhythmias.

Question 28: A cat's blood smear shows many erythrocytes with refractile inclusions near the cell membrane that stain blue with new methylene blue. This is MOST consistent with:

• Siderotic granules
• Heinz bodies (Correct answer)
• Basophilic stippling
• Howell-Jolly bodies

Correct answer: Heinz bodies

Heinz bodies are aggregates of denatured hemoglobin that stain with supravital stains like new methylene blue and are common in cats due to their susceptibility to oxidative damage.

Question 29: In digital radiography, what does the term 'exposure index' indicate?

• The number of exposures taken per study
• The total radiation dose delivered to the patient
• The kVp setting used during the exposure
• A measure of detector exposure level relative to optimal (Correct answer)

Correct answer: A measure of detector exposure level relative to optimal

The exposure index is a numeric value indicating whether the detector received too little (underexposure) or too much (overexposure) radiation relative to the system's calibrated target.

Question 30: When performing a fecal flotation, which of the following solutions is commonly used because its specific gravity allows most common parasite eggs to float while causing heavier debris to sink?

• Distilled water
• Sodium hypochlorite
• 70% Isopropyl alcohol
• Sodium Nitrate (Correct answer)

Correct answer: Sodium Nitrate

Fecal flotation solutions, such as sodium nitrate, zinc sulfate, or sugar solutions, are designed to have a specific gravity (typically 1.18-1.27) that is higher than that of most parasite ova but lower than that of fecal debris. This density difference allows the eggs to float to the surface for collection and identification. Distilled water is not dense enough, and alcohol and hypochlorite are not used for this purpose.

Question 31: A rabbit is being treated for E. cuniculi (Encephalitozoon cuniculi). Which drug is the treatment of choice?

• Metronidazole
• Toltrazuril
• Fenbendazole (Correct answer)
• Praziquantel

Correct answer: Fenbendazole

Fenbendazole is the recommended treatment for E. cuniculi in rabbits, used for 28 days to reduce neurological signs and parasite burden.

Question 32: In CT imaging, Hounsfield units (HU) are used to describe tissue density. Which value most closely corresponds to fluid (water)?

• -1000 HU
• 0 HU (Correct answer)
• +400 HU
• +1000 HU

Correct answer: 0 HU

Water is assigned a Hounsfield unit value of 0 by definition; air is -1000 HU and cortical bone is approximately +1000 HU, forming the anchors of the HU scale.

Question 33: A Collie presents with severe neurological signs, including ataxia and seizures, after receiving a high dose of ivermectin for mange treatment. This adverse reaction is most likely due to a mutation in which gene?

• MDR1 (ABCB1) (Correct answer)
• CYP2D15
• NK-1
• COX-2

Correct answer: MDR1 (ABCB1)

Certain breeds, particularly Collies and related breeds, can have a mutation in the Multidrug Resistance Gene (MDR1), also known as the ABCB1 gene. This gene codes for P-glycoprotein, a transport pump that is part of the blood-brain barrier and actively removes certain drugs, like ivermectin, from the brain. A defective gene leads to the accumulation of the drug in the central nervous system, causing neurotoxicity.

Question 34: Absorbable suture material is MOST appropriate for which of the following applications?

• Skin closure in a contaminated wound
• Ligation of internal vessels and closure of deeper tissue layers (Correct answer)
• Repair of tendons requiring prolonged tensile strength
• Securing indwelling catheters externally

Correct answer: Ligation of internal vessels and closure of deeper tissue layers

Absorbable sutures are used for internal tissues (fascia, vessels, subcutaneous layers) where eventual degradation eliminates the need for removal.

Question 35: When performing a ring block for a digit surgery in a dog, which complication is most likely if epinephrine is included in the local anesthetic?

• Prolonged motor blockade
• Systemic hypertension
• Methemoglobinemia
• Ischemic necrosis of the digit (Correct answer)

Correct answer: Ischemic necrosis of the digit

Epinephrine causes vasoconstriction, which in end-arterial areas like digits can lead to ischemia and necrotic tissue damage.

Question 36: A blood smear from a cat shows pale-staining, small RBCs with a high central pallor. What morphology is described?

• Schistocytes
• Spherocytes
• Acanthocytes
• Hypochromic microcytes (Correct answer)

Correct answer: Hypochromic microcytes

Hypochromic microcytes are smaller than normal with increased central pallor, indicating iron deficiency or chronic blood loss impairing hemoglobin synthesis.

Question 37: Which drug is most commonly used to treat hyperthyroidism in cats?

• Levothyroxine
• Methimazole (Correct answer)
• Propranolol
• Prednisone

Correct answer: Methimazole

Methimazole (Tapazole) inhibits thyroid hormone synthesis and is the most common medical treatment for feline hyperthyroidism.

Question 38: Which reversal agent is used to antagonize the effects of medetomidine in dogs?

• Atipamezole (Correct answer)
• Naloxone
• Neostigmine
• Flumazenil

Correct answer: Atipamezole

Atipamezole is a selective alpha-2 adrenergic antagonist used to reverse the sedative and cardiovascular effects of medetomidine and dexmedetomidine.

Question 39: The Mach effect artifact on a radiograph appears as a dark line at the interface of two structures of different opacity. It is caused by:

• Edge enhancement by the human visual system (Correct answer)
• X-ray tube failure
• Scattered radiation
• Film processing errors

Correct answer: Edge enhancement by the human visual system

The Mach effect is a perceptual phenomenon where the human visual system exaggerates contrast at edges, creating an apparent dark band at density interfaces.

Question 40: Which organism is identified by a positive Voges-Proskauer (VP) test in bacteriology?

• Pseudomonas aeruginosa
• Pasteurella multocida
• Klebsiella pneumoniae (Correct answer)
• Escherichia coli

Correct answer: Klebsiella pneumoniae

Klebsiella pneumoniae produces acetoin (detected by the VP test), whereas E. coli is VP-negative — a key distinction between these Enterobacteriaceae.

Question 41: What is the primary purpose of using a Bain circuit during small animal anesthesia?

• To increase rebreathing of CO2
• To reduce oxygen consumption
• To eliminate the need for a CO2 absorber in large animals
• To allow non-rebreathing with high fresh gas flows (Correct answer)

Correct answer: To allow non-rebreathing with high fresh gas flows

The Bain circuit is a modified Mapleson D non-rebreathing system that uses high fresh gas flows to prevent CO2 rebreathing.

Question 42: Which radiographic view is best for evaluating the trachea and mainstem bronchi in a dog?

• Oblique
• Lateral (Correct answer)
• Ventrodorsal
• Skyline

Correct answer: Lateral

The lateral view superimposes the trachea and mainstem bronchi in profile, making them easiest to evaluate without superimposition of other structures.

Question 43: Which nonsteroidal anti-inflammatory drug (NSAID) is approved for use in cats in the United States for acute pain management?

• Meloxicam (long-term)
• Deracoxib
• Robenacoxib (Correct answer)
• Carprofen

Correct answer: Robenacoxib

Robenacoxib (Onsior) is FDA-approved for short-term acute pain and inflammation in cats, while most other NSAIDs lack cat-specific approvals in the US.

Question 44: According to the DEA, a drug like ketamine, which has an accepted medical use but also a potential for abuse, is classified under which schedule?

• Schedule I
• Schedule II
• Schedule III (Correct answer)
• Schedule V

Correct answer: Schedule III

Ketamine is classified as a Schedule III controlled substance. These drugs have a moderate to low potential for physical and psychological dependence and are used in medical practice. Schedule II drugs (like pure opioids) have a high potential for abuse, and Schedule I drugs have no currently accepted medical use.

Question 45: What does the abbreviation 'SQ' or 'SC' indicate on a prescription label?

• Slowly and carefully
• Subcutaneous route of administration (Correct answer)
• Sublingual route of administration
• Sub-cardiac administration

Correct answer: Subcutaneous route of administration

SQ or SC stands for subcutaneous, meaning the drug is administered into the tissue beneath the skin.

Question 46: A puppy is admitted with severe hemorrhagic diarrhea, vomiting, and leukopenia. The most critical component of treatment for suspected parvoviral enteritis is:

• Immediate whole blood transfusion
• IV fluid therapy and supportive care (Correct answer)
• Antiviral medication administration
• Emergency abdominal surgery

Correct answer: IV fluid therapy and supportive care

Parvoviral enteritis treatment is primarily supportive, with aggressive IV fluid therapy being the cornerstone to correct dehydration and electrolyte imbalances.

Question 47: A veterinary technician performs a Knott's test on a dog's blood sample. This test is used to identify:

• Fungal elements in blood
• Intestinal parasite eggs
• Microfilariae of Dirofilaria immitis (Correct answer)
• Ectoparasites such as Demodex

Correct answer: Microfilariae of Dirofilaria immitis

The Knott's test concentrates and lyses red blood cells to allow microscopic identification of microfilariae in canine blood.

Question 48: Which drug class is commonly used to reverse the effects of benzodiazepine sedation in veterinary patients?

• Opioid antagonists
• Alpha-2 antagonists
• Anticholinergics
• Benzodiazepine antagonists (Correct answer)

Correct answer: Benzodiazepine antagonists

Flumazenil is a benzodiazepine antagonist used to reverse the effects of diazepam and midazolam.

Question 49: What does the term 'first-intention healing' refer to in wound management?

• Healing by granulation tissue filling an open wound
• Healing of a wound closed primarily with sutures where edges are apposed (Correct answer)
• Delayed primary closure after contamination resolves
• Healing via skin grafting

Correct answer: Healing of a wound closed primarily with sutures where edges are apposed

First-intention (primary) healing occurs when wound edges are surgically apposed with sutures, staples, or adhesive, minimizing scar formation.

Question 50: Which positioning aid helps prevent patient rotation when obtaining a true lateral thoracic radiograph?

• Foam wedges placed under the sternum and spine (Correct answer)
• Tape applied across the thorax
• Compression paddle over the caudal thorax
• A sandbag placed on the thorax

Correct answer: Foam wedges placed under the sternum and spine

Foam wedges placed under the sternum or dorsum support the patient's body and prevent axial rotation, ensuring the ribs on both sides are superimposed for a true lateral projection.

Question 51: Guinea pigs must always have access to?

• Vitamin D
• Vitamin A
• Vitamin C
• Vitamin B

Because they are unable to produce their own vitamin C, humans, primates, apes, guinea pigs, capybaras, and some bats, birds, and fish must obtain it from outside sources.

Question 52: What is the mechanism by which metronidazole kills anaerobic bacteria?

• Inhibits cell wall synthesis
• Inhibits protein synthesis at the 50S ribosomal subunit
• Blocks dihydrofolate reductase
• Forms toxic free radicals that damage DNA after reduction in anaerobic conditions (Correct answer)

Correct answer: Forms toxic free radicals that damage DNA after reduction in anaerobic conditions

Metronidazole is reduced by anaerobic organisms into reactive intermediates that form free radicals, causing lethal DNA strand breakage.

Question 53: A serum biochemistry panel shows markedly elevated ALT and AST with mildly elevated ALP in a dog. This pattern is MOST consistent with:

• Primary cholestasis
• Pancreatic disease
• Hepatocellular damage or necrosis (Correct answer)
• Renal failure

Correct answer: Hepatocellular damage or necrosis

ALT and AST are hepatocellular enzymes released when liver cells are damaged or necrotic, whereas ALP elevation is more pronounced with cholestasis.

Question 54: Which radiographic sign indicates free gas in the peritoneal cavity (pneumoperitoneum)?

• Dilated fluid-filled loops of intestine
• Serosal detail loss
• Gas opacity between the liver and diaphragm on a standing lateral or DV view (Correct answer)
• Uniform increased abdominal opacity

Correct answer: Gas opacity between the liver and diaphragm on a standing lateral or DV view

Free peritoneal gas rises to the highest point and is visible as a radiolucent stripe between the liver and diaphragm on a standing lateral or horizontal-beam view.

Question 55: Which of the following correctly describes the 'scrubbed' role versus the 'circulating' role in the surgical team?

• Both roles are sterile during the procedure
• The circulator passes sterile instruments directly to the surgeon
• The scrubbed technician is sterile and handles instruments; the circulator is non-sterile and handles non-sterile tasks (Correct answer)
• The scrubbed technician opens sterile packages from outside the field

Correct answer: The scrubbed technician is sterile and handles instruments; the circulator is non-sterile and handles non-sterile tasks

The scrubbed (sterile) technician is gowned and gloved, handling sterile instruments, while the circulator remains non-sterile to manage the OR environment and open supplies.

Question 56: What is the term for an abnormal tooth position or bite relationship in veterinary patients?

• Ankylosis
• Malocclusion (Correct answer)
• Hypodontia
• Oligodontia

Correct answer: Malocclusion

Malocclusion refers to any abnormal alignment or occlusal relationship between the upper and lower dental arcades.

Question 57: What does the term 'left shift' mean on a CBC differential?

• Decreased total white blood cell count
• Increased immature neutrophils (bands) in circulation (Correct answer)
• Increased eosinophil count
• Shift of platelets to smaller size

Correct answer: Increased immature neutrophils (bands) in circulation

A left shift refers to the presence of increased band neutrophils or earlier precursors in peripheral blood, indicating bone marrow release in response to increased demand.

Question 58: When using a standard refractometer in a veterinary clinic, which two measurements are most commonly performed?

• Urine pH and ketone levels
• Blood glucose and packed cell volume
• Blood urea nitrogen and creatinine
• Urine specific gravity and total protein (Correct answer)

Correct answer: Urine specific gravity and total protein

A clinical refractometer is a standard piece of equipment used to measure the refractive index of a fluid. In veterinary practice, its primary uses are to determine the urine specific gravity (USG), which assesses the concentrating ability of the kidneys, and the total protein (TP) or total solids in plasma or serum.

Question 59: Which component of the anesthetic machine is specifically designed to absorb exhaled carbon dioxide in a rebreathing circuit?

• The vaporizer
• The pop-off valve
• The oxygen flowmeter
• The soda lime canister (Correct answer)

Correct answer: The soda lime canister

The soda lime canister contains granules (such as soda lime or other absorbents) that chemically react with and remove carbon dioxide from the exhaled gases. This allows the patient to safely rebreathe the remaining gases, including oxygen and anesthetic vapor, conserving heat, moisture, and anesthetic agent.

Question 60: Which one of the following effectively disinfects surfaces?

• 1.6% solution of sodium hypochlorite
• 5.25% solution of sodium hypochlorite (Correct answer)
• 1:5 dilution of 5.25% solution of sodium hypochlorite
• 1:32 dilution of 5.25% solution of sodium hypochlorite

Correct answer: 5.25% solution of sodium hypochlorite

Cleaning the surface thoroughly is a prerequisite for effective surface disinfection. The surface disinfectant should also sufficiently cover the surface and remain in touch with it for an appropriate amount of time. Bleach's active ingredient, sodium hypochlorite, offers the best disinfection at 0.16% solution concentration. A 5.25% solution is diluted to a 1:32 dilution to get a 0.16% solution. Parvovirus, along with other bacteria and viruses, can be effectively treated with diluted sodium hypochlorite or bleach solutions.

Question 61: When collecting a urine sample by cystocentesis, which needle gauge and direction is most appropriate?

• 18-gauge needle, into the urethra
• 22-gauge needle, directed into the bladder body (Correct answer)
• 25-gauge needle, into the renal pelvis
• 16-gauge needle, directed toward the bladder neck

Correct answer: 22-gauge needle, directed into the bladder body

A 22-gauge needle directed into the body of the bladder is standard for cystocentesis to minimize trauma and obtain a sterile sample.

Question 62: When performing a pre-anesthetic physical exam, which ASA classification applies to a patient with a severe systemic disease that is a constant threat to life?

• ASA III
• ASA II
• ASA V
• ASA IV (Correct answer)

Correct answer: ASA IV

ASA IV describes a patient with severe systemic disease that is a constant life threat, representing very high anesthetic risk.

Question 63: Which blood chemistry panel finding is most consistent with Addison's disease (hypoadrenocorticism) in a dog?

• Hyperkalemia and hyponatremia (Correct answer)
• Hypoglycemia and elevated BUN only
• Hypercalcemia and hyperphosphatemia
• Hypokalemia and hypernatremia

Correct answer: Hyperkalemia and hyponatremia

Addison's disease causes decreased aldosterone, leading to sodium loss and potassium retention, resulting in hyponatremia and hyperkalemia.

Question 64: Which of the following accurately describes 'bioavailability'?

• Volume in which a drug is distributed in the body
• Fraction of administered drug that reaches systemic circulation unchanged (Correct answer)
• Ability of drug to cross the blood-brain barrier
• Rate of drug metabolism in the liver

Correct answer: Fraction of administered drug that reaches systemic circulation unchanged

Bioavailability refers to the proportion of a drug that enters the systemic circulation in its active form after administration.

Question 65: The zona contaminata in surgery refers to:

• The area beyond the sterile field that is considered non-sterile (Correct answer)
• The sterile draped area immediately around the incision
• The surgical site preparation zone
• The scrub technician's back table

Correct answer: The area beyond the sterile field that is considered non-sterile

The zona contaminata encompasses all areas outside the established sterile field, which are considered non-sterile and must not contact sterile items.

Question 66: What is the primary mechanism of action of acepromazine as a preanesthetic?

• Alpha-2 adrenergic agonism
• Opioid receptor agonism
• NMDA receptor antagonism
• Dopamine receptor antagonism (Correct answer)

Correct answer: Dopamine receptor antagonism

Acepromazine is a phenothiazine tranquilizer that works primarily by blocking dopamine receptors in the CNS, producing sedation and reducing anxiety.

Question 67: Which controlled substance schedule includes drugs with accepted medical use but high potential for abuse, such as morphine?

• Schedule II (Correct answer)
• Schedule IV
• Schedule III
• Schedule I

Correct answer: Schedule II

Schedule II drugs have accepted medical use but a high potential for abuse and severe psychological or physical dependence.

Question 68: What is the primary reason ethylene oxide (EtO) gas sterilization is used for certain surgical equipment?

• It is less expensive than all other methods
• It sterilizes heat- and moisture-sensitive items that cannot withstand steam (Correct answer)
• It does not require aeration time before use
• It is faster than autoclave sterilization

Correct answer: It sterilizes heat- and moisture-sensitive items that cannot withstand steam

EtO sterilization is used for items such as plastics, electronics, and rubber goods that would be damaged by the heat and moisture of steam autoclaving.

Question 69: What is the primary mechanism by which opioids provide analgesia in veterinary patients?

• Blocking sodium channels in peripheral nerves
• Inhibiting cyclooxygenase enzymes
• Binding to mu, kappa, and delta receptors in the CNS and periphery (Correct answer)
• Blocking NMDA receptors

Correct answer: Binding to mu, kappa, and delta receptors in the CNS and periphery

Opioids primarily act by binding to opioid receptors (mu, kappa, delta) in the brain, spinal cord, and peripheral tissues to inhibit pain transmission.

Question 70: Which of the following inhalant anesthetics has the LOWEST blood:gas partition coefficient, resulting in the fastest induction and recovery?

• Desflurane (Correct answer)
• Isoflurane
• Halothane
• Sevoflurane

Correct answer: Desflurane

Desflurane has the lowest blood:gas partition coefficient (0.42), meaning it equilibrates rapidly and produces the fastest induction and recovery.

Question 71: A patient's rectal temperature is 104.5°F (40.3°C). How is this classified in dogs?

• Severe hyperthermia
• Hypothermia
• Normal
• Mild to moderate hyperthermia (Correct answer)

Correct answer: Mild to moderate hyperthermia

Normal canine rectal temperature is 100.5–102.5°F; 104.5°F falls in the mild to moderate hyperthermia range, with severe hyperthermia typically above 106°F.

Question 72: Which MRI sequence produces images where fluid appears bright (hyperintense)?

• Gradient echo
• T2-weighted (Correct answer)
• T1-weighted
• STIR

Correct answer: T2-weighted

On T2-weighted sequences, fluids have long T2 relaxation times and therefore appear bright, making them useful for detecting edema, effusions, and CSF.

Question 73: When performing a final instrument count at the end of surgery, the scrub tech and circulating tech find one sponge is unaccounted for. What is the correct action?

• Document the missing sponge and monitor the patient post-operatively
• Proceed with closure and document the discrepancy post-operatively
• Recount only the sponges and close if the recount is unclear
• Alert the surgeon immediately and search the wound and surrounding field before closing (Correct answer)

Correct answer: Alert the surgeon immediately and search the wound and surrounding field before closing

A discrepancy in sponge count requires immediate notification of the surgeon and a thorough search of the wound before closure to prevent retained foreign body.

Question 74: Which drug is commonly used as a preanesthetic to reduce salivation and bradycardia in veterinary patients?

• Atropine (Correct answer)
• Acepromazine
• Diazepam
• Butorphanol

Correct answer: Atropine

Atropine is an anticholinergic drug that blocks muscarinic receptors, reducing secretions and preventing vagally-induced bradycardia.

Question 75: Which positioning aid is MOST appropriate for keeping a patient's limb in true lateral for an orthopedic radiograph?

• Lead gloves held by an assistant
• Tape only
• Sandbags (Correct answer)
• Foam wedges

Correct answer: Sandbags

Sandbags provide firm, moldable support to maintain limb position without personnel entering the primary beam, complying with ALARA principles.

Question 76: Which of the following suture removal timelines is appropriate for a routine skin closure on the trunk of a dog?

• 7–10 days (Correct answer)
• 28 days
• 14–21 days
• 3–5 days

Correct answer: 7–10 days

Skin sutures on the trunk of a dog are typically removed at 7–10 days once adequate tensile strength has been achieved by the healing tissue.

Question 77: A fecal flotation using zinc sulfate solution is BEST suited for detecting which parasite?

• Giardia cysts (Correct answer)
• Toxocara eggs
• Tapeworm proglottids
• Dipylidium proglottids

Correct answer: Giardia cysts

Zinc sulfate flotation preserves the morphology of Giardia cysts better than other flotation solutions.

Question 78: Which artifact on MRI appears as alternating bright and dark bands and is caused by motion during image acquisition?

• Susceptibility artifact
• Ghosting (motion artifact) (Correct answer)
• Aliasing (wraparound) artifact
• Chemical shift artifact

Correct answer: Ghosting (motion artifact)

Ghosting or motion artifact creates ghost images or banding in the phase-encode direction due to periodic motion (e.g., breathing, cardiac pulsation) during the MRI acquisition.

Question 79: During anesthesia, a cat's respiratory rate drops to 4 breaths per minute. Which intervention is MOST appropriate?

• Administer doxapram IV
• Assist or control ventilation manually (Correct answer)
• Increase the vaporizer setting
• Administer atropine IV

Correct answer: Assist or control ventilation manually

Severe hypoventilation requires immediate ventilatory support via manual or mechanical ventilation to prevent hypercapnia and hypoxemia.

Question 80: A lateral skull radiograph of a cat shows lysis of the tympanic bullae with soft tissue opacity filling the bulla. The most likely diagnosis is:

• Otitis media/interna with bulla involvement (Correct answer)
• Feline acromegaly
• Temporomandibular joint ankylosis
• Nasopharyngeal polyp without bony changes

Correct answer: Otitis media/interna with bulla involvement

Lysis of the tympanic bulla combined with soft tissue opacity filling the bulla cavity is characteristic of chronic otitis media/interna with secondary osteomyelitis.

Question 81: In a cat with hypertrophic cardiomyopathy (HCM), which anesthetic protocol component should be AVOIDED?

• Opioid premedication
• Tachycardia-inducing agents (Correct answer)
• Local nerve blocks
• Isoflurane maintenance

Correct answer: Tachycardia-inducing agents

Tachycardia reduces diastolic filling time in HCM patients, worsening obstruction and cardiac output; agents like ketamine or anticholinergics should be avoided.

Question 82: A dog is presented with pale mucous membranes, tachycardia, and weak pulses. These signs are most consistent with:

• Polycythemia
• Hypertension
• Hyperthermia
• Shock (Correct answer)

Correct answer: Shock

Pale mucous membranes, tachycardia, and weak pulses are classic signs of shock due to poor tissue perfusion.

Question 83: The preferred position for a patient in respiratory distress to maximize lung expansion is:

• Sternal recumbency (Correct answer)
• Dorsal recumbency
• Left lateral recumbency
• Trendelenburg position

Correct answer: Sternal recumbency

Sternal recumbency allows gravity to assist diaphragmatic movement and provides the greatest functional residual capacity in the lungs.

Question 84: An anesthetized patient's end-tidal CO2 (ETCO2) begins to rise and the inspiratory CO2 is also noted to be above zero. Which of the following is the most likely cause?

• Anesthetic overdose
• Exhausted soda lime (Correct answer)
• Decreased cardiac output
• Hypothermia

Correct answer: Exhausted soda lime

Exhausted soda lime in a rebreathing circuit can no longer absorb expired carbon dioxide. This leads to rebreathing of CO2, causing a rise in both inspiratory and end-tidal CO2 levels (hypercapnia).

Question 85: After a tooth extraction in a veterinary patient, what is the recommended post-operative instruction regarding feeding?

• Feed soft or moistened food and avoid hard chews for 10–14 days (Correct answer)
• Feed a high-fiber dry kibble immediately to stimulate healing
• Withhold all food for 48 hours
• Provide only liquid nutrition for 30 days

Correct answer: Feed soft or moistened food and avoid hard chews for 10–14 days

Soft or moistened food is recommended for 10–14 days post-extraction to avoid disrupting the healing alveolar socket and sutures.

Question 86: Which of the following correctly describes the effect of hypothermia on drug metabolism during anesthesia?

• It has no effect on drug pharmacokinetics
• It prolongs the duration of anesthetic drugs by slowing metabolism (Correct answer)
• It increases renal clearance of drugs
• It accelerates hepatic enzyme activity

Correct answer: It prolongs the duration of anesthetic drugs by slowing metabolism

Hypothermia decreases hepatic enzyme activity and reduces blood flow, slowing drug metabolism and prolonging the action of anesthetic agents.

Question 87: A quality control chart shows three consecutive values on the same side of the mean. This pattern is called a:

• Westgard 3s violation
• Trend or shift warning (Correct answer)
• Random error
• Coefficient of variation breach

Correct answer: Trend or shift warning

Three or more consecutive QC values on the same side of the mean suggest a systematic trend or shift in the assay, warranting investigation before patient results are reported.

Question 88: In small animal anesthesia, what is the primary purpose of using a cuffed endotracheal tube?

• To prevent aspiration and create a seal for positive-pressure ventilation (Correct answer)
• To increase dead space
• To deliver oxygen directly to the alveoli
• To facilitate CO2 absorption

Correct answer: To prevent aspiration and create a seal for positive-pressure ventilation

A cuffed endotracheal tube seals the trachea to prevent aspiration of oral fluids/regurgitation and allows effective positive-pressure ventilation.

Question 89: A 5-kg cat is anesthetized using a non-rebreathing circuit. Fifteen minutes into the procedure, the technician notes the patient's rectal temperature has dropped significantly. Which factor is the most likely primary contributor to this rapid heat loss?

• The clipping of the patient's fur for the surgical prep.
• The high flow rate of cool, dry gas required by the circuit. (Correct answer)
• The administration of an opioid as a premedication.
• The thermal conductivity of the stainless steel surgical table.

Correct answer: The high flow rate of cool, dry gas required by the circuit.

Non-rebreathing circuits require high fresh gas flow rates to flush out exhaled carbon dioxide. This high flow of un-warmed, non-humidified gas from the oxygen source causes significant evaporative and convective heat loss from the patient's respiratory tract, making it a primary contributor to perioperative hypothermia, especially in small patients.

Question 90: Which type of wound healing occurs when wound edges are directly apposed and the wound closes with minimal scar formation?

• Third intention
• Second intention
• First intention (primary closure) (Correct answer)
• Granulation closure

Correct answer: First intention (primary closure)

First intention (primary closure) healing occurs when wound edges are sutured together directly, resulting in rapid healing with minimal scarring.

Question 91: On an ultrasound of the canine abdomen, which structure typically appears as a hyperechoic line with acoustic shadowing in the right cranial abdomen?

• The right kidney cortex
• The gallbladder wall
• The portal vein wall
• Gas within the duodenum (Correct answer)

Correct answer: Gas within the duodenum

Gas within the duodenal lumen produces a hyperechoic interface with dirty acoustic shadowing, a normal finding that can limit visualization of structures behind it.

Question 92: Which nerve block technique would be MOST appropriate to provide dental analgesia for a maxillary canine tooth extraction in a dog?

• Retrobulbar block
• Mental nerve block
• Mandibular nerve block
• Infraorbital nerve block (Correct answer)

Correct answer: Infraorbital nerve block

The infraorbital nerve block desensitizes the maxillary teeth (rostral to the 4th premolar) and surrounding tissues, making it ideal for maxillary canine extraction.

Question 93: Which antibiotic class inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins?

• Fluoroquinolones
• Beta-lactams (Correct answer)
• Macrolides
• Aminoglycosides

Correct answer: Beta-lactams

Beta-lactam antibiotics (penicillins, cephalosporins) inhibit cell wall synthesis by binding to penicillin-binding proteins (PBPs).

Question 94: Which of the following contrast agents is used for gastrointestinal studies when perforation is suspected?

• Iodinated oil
• Barium sulfate
• Iohexol (Omnipaque) (Correct answer)
• Iopamidol (Isovue)

Correct answer: Iohexol (Omnipaque)

Water-soluble iodinated contrast such as iohexol is used when GI perforation is suspected because barium causes severe peritonitis if it leaks into the abdomen.

Question 95: A veterinarian prescribes enalapril for a dog with congestive heart failure. What drug class does enalapril belong to?

• ACE inhibitor (Correct answer)
• Calcium channel blocker
• Beta-blocker
• Diuretic

Correct answer: ACE inhibitor

Enalapril is an ACE (angiotensin-converting enzyme) inhibitor used to reduce cardiac workload in heart failure.

Question 96: A radiograph of a cat's abdomen reveals a 'string of pearls' pattern in the small intestine. This finding suggests:

• Normal gas distribution
• Intussusception
• Functional ileus
• Mechanical ileus with gas trapped in mucosal folds (Correct answer)

Correct answer: Mechanical ileus with gas trapped in mucosal folds

A 'string of pearls' pattern describes small oval gas bubbles trapped between mucosal folds, a classic sign of mechanical small intestinal obstruction.

Question 97: A technician receives a prescription for a Schedule III controlled substance. How long is this prescription valid in most US states?

• 30 days
• Indefinitely
• 6 months (Correct answer)
• 1 year

Correct answer: 6 months

Schedule III and IV prescriptions are typically valid for 6 months and may be refilled up to 5 times during that period.

Question 98: On a urinalysis, which finding is considered NORMAL in small animals?

• 4+ proteinuria
• 3+ glucosuria
• Occasional hyaline casts (0–2/lpf) (Correct answer)
• Numerous WBCs (>5/hpf)

Correct answer: Occasional hyaline casts (0–2/lpf)

Occasional hyaline casts (0–2 per low-power field) can be a normal finding, as they form from Tamm-Horsfall protein secreted by tubular cells.

Question 99: When reading a urine dipstick result for protein, which sample characteristic can cause a false-positive reaction?

• Yellow-colored urine
• Presence of glucose
• Highly alkaline urine (pH > 8) (Correct answer)
• Dilute urine (SG < 1.010)

Correct answer: Highly alkaline urine (pH > 8)

Highly alkaline urine can cause false-positive protein results on dipstick because the colorimetric reaction is pH-dependent.

Question 100: Which electrolyte imbalance is most commonly associated with urethral obstruction in cats?

• Hypocalcemia
• Hypomagnesemia
• Hyponatremia
• Hyperkalemia (Correct answer)

Correct answer: Hyperkalemia

Urethral obstruction prevents potassium excretion, leading to life-threatening hyperkalemia that can cause cardiac arrhythmias.

Question 101: What is the purpose of using a grid in radiography?

• To decrease patient dose
• To collimate the primary beam
• To increase the mAs required
• To reduce scatter radiation reaching the image receptor (Correct answer)

Correct answer: To reduce scatter radiation reaching the image receptor

A grid consists of lead strips that absorb scattered radiation produced in the patient, improving image contrast by reducing the scatter fog reaching the detector.

Question 102: If a patient presented with dry and retracted eyes, dry mucous membranes, weak and rapid pulses, and a significant loss of skin turgor, at what percentage of interstitial dehydration would you estimate the patient to be?

• 0–3%
• More than 11%
• 8–10% (Correct answer)
• 4–5%

Correct answer: 8–10%

It is possible to estimate that a patient has 8–10% interstitial dehydration if they have dry and retracted eyes, dry mucous membranes, weak and fast pulses, and a considerable loss of skin turgor.

Question 103: A neutered male pig's correct name is a?

• Wether
• Barrow (Correct answer)
• Gelding
• Gib

Correct answer: Barrow

A barrow is a male, neutered pig. Gib is the term for a neutered male ferret. A gelding is a male horse or llama that has been neutered. Sheep that have been neutered are wethers.

Question 104: What instrument is used to measure periodontal pocket depth during an oral examination?

• Dental scaler
• Periodontal probe (Correct answer)
• Explorer probe
• Curette

Correct answer: Periodontal probe

A periodontal probe, marked in millimeter increments, is inserted into the gingival sulcus to measure pocket depth and attachment loss.

Question 105: A dog under inhalant anesthesia shows a sudden decrease in end-tidal CO2 from 45 mmHg to 15 mmHg. What is the MOST likely cause?

• Hypoventilation
• Pulmonary thromboembolism or cardiac arrest (Correct answer)
• Excessive anesthetic depth
• Hyperthermia

Correct answer: Pulmonary thromboembolism or cardiac arrest

A sudden dramatic drop in EtCO2 is a classic sign of pulmonary thromboembolism or cardiac arrest, where CO2 delivery to the lungs ceases.

Question 106: During an abdominal ultrasound, a structure appears completely black on the monitor, indicating that it is free of echoes. Which of the following terms correctly describes this appearance?

• Hypoechoic
• Isoechoic
• Anechoic (Correct answer)
• Hyperechoic

Correct answer: Anechoic

The term 'anechoic' literally means 'without echo.' On an ultrasound image, structures that allow sound waves to pass through them without reflection, such as simple fluid within the urinary bladder or a cyst, appear black.

Question 107: During an abdominal ultrasound, the veterinarian points out the urinary bladder, which appears completely black on the screen. What is the correct term to describe this appearance?

• Hypoechoic
• Hyperechoic
• Isoechoic
• Anechoic (Correct answer)

Correct answer: Anechoic

The term 'anechoic' means without echo. Simple fluids, like urine in the bladder, do not reflect the ultrasound waves back to the transducer. Therefore, these structures appear black on the ultrasound image. 'Hyperechoic' means brighter than surrounding tissue (e.g., bone), 'hypoechoic' means darker than surrounding tissue (e.g., muscle), and 'isoechoic' means having the same brightness.

Question 108: A veterinary technician is setting up for a feline ovariohysterectomy (OHE). Which instrument is used to tent and elevate the uterine horn for ligature placement?

• Backhaus clamp
• Allis forceps
• Snook hook (spay hook) (Correct answer)
• Senn retractor

Correct answer: Snook hook (spay hook)

The Snook hook (spay hook) is specifically designed to locate and elevate the uterine horn through a small abdominal incision during an OHE.

Question 109: What is the withdrawal time of a drug in food-producing animals?

• Time needed for a drug to reach peak plasma concentration
• Time required for 50% of the drug to be eliminated from plasma
• Period after drug administration before the animal or its products are safe for human consumption (Correct answer)
• Duration of therapeutic effect after a single dose

Correct answer: Period after drug administration before the animal or its products are safe for human consumption

Withdrawal time is the mandatory period that must elapse after the last drug dose before the animal or its products (meat, milk, eggs) can enter the human food supply.

Question 110: A veterinary technician uses a handheld refractometer to measure a patient's urine specific gravity. What is the underlying physical principle that allows this instrument to provide a measurement?

• The electrical impedance created as cells pass through an aperture.
• The bending of light as it passes through a fluid containing dissolved solids. (Correct answer)
• The absorption of specific light wavelengths by solutes.
• The scattering of a light beam by suspended particles.

Correct answer: The bending of light as it passes through a fluid containing dissolved solids.

A refractometer operates on the principle of light refraction. It measures the angle at which light bends as it passes from the air through the liquid sample (the refractive index). The concentration of dissolved solids in the fluid (like solutes in urine or proteins in plasma) determines the degree of this bending. The instrument's scale is calibrated to correlate this angle of refraction to a specific gravity or total protein value.

Question 111: Which aminoglycoside is the most harmful to the kidneys?

• Neomycin (Correct answer)
• Streptomycin
• Tobramycin
• Amikacin

Correct answer: Neomycin

The most nephrotoxic aminoglycoside is neomycin. Nephrotoxicosis, ototoxicosis, and vestibulotoxicosis are three of the main side effects of aminoglycosides. With frequent and prolonged administration of aminoglycosides, especially when trough concentrations are chronically increased, nephrotoxicosis risk increases. According to articles in the veterinary literature, neomycin is the most kidney-damaging of the group.

Question 112: Which drug is the reversal agent for alpha-2 adrenergic agonists such as dexmedetomidine?

• Naloxone
• Atipamezole (Correct answer)
• Flumazenil
• Neostigmine

Correct answer: Atipamezole

Atipamezole (Antisedan) is a specific alpha-2 antagonist used to reverse the effects of medetomidine and dexmedetomidine.

Question 113: A veterinary technician examines a urine sediment sample from a 7-year-old male Dalmatian and observes numerous flat, six-sided, colorless crystals. This finding is most consistent with which type of crystal?

• Struvite
• Uric Acid (Correct answer)
• Calcium Carbonate
• Calcium Oxalate Dihydrate

Correct answer: Uric Acid

Dalmatians have a genetic defect in purine metabolism that leads to increased excretion of uric acid in their urine. This predisposes them to the formation of uric acid crystals and uroliths, which are characteristically diamond, rhomboid, or six-sided (hexagonal) plates.

Question 114: Monofilament suture material is preferred over multifilament in contaminated wounds primarily because:

• It ties more securely
• It has less capillarity and reduces bacterial wicking (Correct answer)
• It is absorbed faster
• It is stronger

Correct answer: It has less capillarity and reduces bacterial wicking

Monofilament suture has a smooth surface with no interstices, reducing capillarity and the risk of bacteria being wicked along the suture into the wound.

Question 115: Which radiographic sign describes air within the intestinal wall (intramural gas) seen in necrotizing enterocolitis or emphysematous gastritis?

• Pneumatosis intestinalis (Correct answer)
• Ileus pattern
• Pneumoperitoneum
• Mechanical obstruction

Correct answer: Pneumatosis intestinalis

Pneumatosis intestinalis refers to gas trapped within the intestinal wall layers, which is a grave sign indicating bowel necrosis or severe mucosal compromise.

Question 116: Which of the following best describes the role of the circulating nurse/technician during surgery?

• Monitors anesthesia exclusively
• Works within the sterile field and passes instruments directly to the surgeon
• Performs the surgical scrub alongside the surgeon
• Remains outside the sterile field, manages non-sterile supplies, and coordinates the OR environment (Correct answer)

Correct answer: Remains outside the sterile field, manages non-sterile supplies, and coordinates the OR environment

The circulating technician works outside the sterile field, managing non-sterile tasks such as opening supplies, adjusting lighting, and supporting the team.

Question 117: Propofol is classified as which type of anesthetic agent?

• Inhalant anesthetic
• Barbiturate
• Dissociative anesthetic
• Injectable short-acting hypnotic (Correct answer)

Correct answer: Injectable short-acting hypnotic

Propofol is a phenol-based injectable hypnotic/anesthetic with rapid onset and short duration, used for induction and total intravenous anesthesia (TIVA).

Question 118: When monitoring a patient under general anesthesia, which parameter BEST reflects the adequacy of ventilation?

• Pulse oximetry (SpO2)
• End-tidal CO2 (EtCO2) (Correct answer)
• Heart rate
• Blood pressure

Correct answer: End-tidal CO2 (EtCO2)

End-tidal CO2 directly reflects the patient's ventilatory status by measuring CO2 elimination at the end of each breath.

Question 119: A horse is treated with phenylbutazone. Which condition is a major concern with prolonged NSAID use in horses?

• Right dorsal colitis and gastric ulceration (Correct answer)
• Hepatic failure
• Neurological signs
• Respiratory depression

Correct answer: Right dorsal colitis and gastric ulceration

Prolonged or high-dose phenylbutazone use in horses can cause right dorsal colitis and gastrointestinal ulceration due to COX inhibition reducing protective prostaglandins.

Question 120: What is the purpose of a surgical drape fenestration?

• To provide a pocket for holding instruments
• To allow ventilation over the surgical site
• To expose only the prepared surgical site while covering surrounding areas (Correct answer)
• To mark the incision line

Correct answer: To expose only the prepared surgical site while covering surrounding areas

The fenestration (opening) in a surgical drape isolates the sterile operative field from the non-sterile surrounding patient area.

Question 121: Which of the following is the MOST accurate method to confirm correct endotracheal tube placement?

• Capnography showing a normal waveform (Correct answer)
• Visualization of the tube passing through the larynx
• Auscultation of breath sounds bilaterally
• Watching chest rise

Correct answer: Capnography showing a normal waveform

Capnography demonstrating a consistent CO2 waveform is the gold standard for confirming endotracheal intubation, as esophageal placement will not produce a waveform.

Question 122: A radiograph shows a 'ground glass' opacity diffusely throughout the lung fields of a cat. This pattern is most consistent with which condition?

• Pneumothorax
• Pulmonary edema or early consolidation (Correct answer)
• Pleural effusion
• Diaphragmatic hernia

Correct answer: Pulmonary edema or early consolidation

A diffuse ground glass opacity indicates partial alveolar filling, most commonly seen with pulmonary edema, hemorrhage, or early infectious consolidation.

Question 123: Which of the following correctly describes the pharmacokinetic term 'half-life'?

• The volume in which a drug distributes in the body
• The time required for the plasma concentration of a drug to decrease by 50% (Correct answer)
• The fraction of administered drug that reaches systemic circulation
• The time for a drug to reach maximum plasma concentration

Correct answer: The time required for the plasma concentration of a drug to decrease by 50%

Half-life (t½) is the time required for the drug's plasma concentration to decrease by 50%, determining dosing intervals and time to steady state.

Question 124: A patient with suspected thrombocytopenia requires a temperature assessment. Which method should be used with caution due to bleeding risk?

• Axillary temperature
• Tympanic temperature
• Rectal temperature (Correct answer)
• Temporal artery temperature

Correct answer: Rectal temperature

Rectal temperature measurement carries a risk of mucosal bleeding in thrombocytopenic patients due to low platelet counts and impaired hemostasis.

Question 125: A cat receiving enrofloxacin at high doses is at risk for which serious adverse effect?

• Bone marrow suppression
• Nephrotoxicity
• Retinal degeneration and blindness (Correct answer)
• Hepatotoxicity

Correct answer: Retinal degeneration and blindness

High doses of enrofloxacin in cats can cause acute retinal degeneration leading to blindness due to fluoroquinolone toxicity specific to feline photoreceptors.

Question 126: Which statement about nuclear scintigraphy (gamma scintigraphy) is CORRECT?

• It uses radioactive tracers to evaluate physiologic function (Correct answer)
• It provides superior anatomical detail compared to MRI
• It is primarily used for soft tissue mass biopsy guidance
• It does not produce ionizing radiation

Correct answer: It uses radioactive tracers to evaluate physiologic function

Nuclear scintigraphy uses radiopharmaceuticals (radioactive tracers) that localize to specific tissues or organs, allowing functional assessment such as thyroid activity or bone metabolism.

Question 127: Which drug class is used to treat heartworm disease (Dirofilaria immitis) adulticide therapy in dogs?

• Macrocyclic lactones
• Melarsomine (Correct answer)
• Piperazine
• Benzimidazoles

Correct answer: Melarsomine

Melarsomine dihydrochloride (Immiticide) is the only FDA-approved adulticide for treating adult heartworms in dogs.

Question 128: The normal capillary refill time (CRT) in a healthy dog or cat is:

• 3–4 seconds
• Greater than 4 seconds
• 2–3 seconds
• Less than 2 seconds (Correct answer)

Correct answer: Less than 2 seconds

A CRT of less than 2 seconds indicates adequate peripheral perfusion in dogs and cats.

Question 129: When performing a surgical hand scrub, the technician should scrub their hands and arms in a way that ensures:

• A non-antiseptic soap is used to preserve normal skin flora.
• The fingers and hands are scrubbed last, after the forearms.
• Water runs from the fingertips down to the elbows. (Correct answer)
• The hands are held below the level of the elbows at all times.

Correct answer: Water runs from the fingertips down to the elbows.

During a surgical scrub, hands must be held higher than the elbows to allow water to flow from the cleanest area (the fingertips) down towards the less clean area (the elbows), preventing contamination of the hands. An antiseptic agent should be used, and the scrubbing process should proceed from the fingertips down to the forearms.

Question 130: Which coagulation test evaluates the extrinsic pathway of the clotting cascade?

• Activated clotting time (ACT)
• Prothrombin time (PT) (Correct answer)
• Bleeding time
• Activated partial thromboplastin time (aPTT)

Correct answer: Prothrombin time (PT)

PT evaluates Factor VII and the common pathway (Factors X, V, II, I), reflecting the extrinsic coagulation cascade.

Question 131: Which of the following instruments would be classified as a self-retaining retractor, commonly used to hold abdominal wall incisions open during a laparotomy?

• Senn Retractor
• Hohmann Retractor
• Army-Navy Retractor
• Balfour Retractor (Correct answer)

Correct answer: Balfour Retractor

The Balfour retractor is a self-retaining instrument with blades and a frame that holds the abdominal incision open, freeing the surgeon's and assistant's hands. Senn, Army-Navy, and Hohmann retractors are all hand-held retractors that require a person to physically hold them in place.

Question 132: Which of the following drugs is an alpha-2 adrenergic agonist that provides sedation, analgesia, and muscle relaxation but can also cause significant cardiovascular side effects such as bradycardia and initial hypertension?

• Dexmedetomidine (Correct answer)
• Ketamine
• Atropine
• Propofol

Correct answer: Dexmedetomidine

Dexmedetomidine is a potent alpha-2 adrenergic agonist commonly used in veterinary medicine. Its primary effects are sedation, analgesia, and muscle relaxation. However, it is known to cause profound cardiovascular effects, including an initial hypertension followed by a decrease in blood pressure, and a significant, centrally-mediated bradycardia.

Question 133: What is the antidote for organophosphate toxicity?

• Atropine and pralidoxime (2-PAM) (Correct answer)
• Naloxone and activated charcoal
• Flumazenil and pralidoxime
• N-acetylcysteine and vitamin K1

Correct answer: Atropine and pralidoxime (2-PAM)

Atropine counteracts excessive muscarinic stimulation (SLUDGE signs), while pralidoxime (2-PAM) reactivates acetylcholinesterase if given early before aging occurs.

Question 134: Which electrolyte abnormality is most commonly associated with urethral obstruction in cats?

• Hypochloremia
• Hypernatremia
• Hypokalemia
• Hyperkalemia (Correct answer)

Correct answer: Hyperkalemia

Urethral obstruction causes post-renal azotemia and inability to excrete potassium, leading to life-threatening hyperkalemia that can cause cardiac arrhythmias.

Question 135: A sample requiring immediate serum separation should ideally be centrifuged within how many minutes of collection?

• 5 minutes
• 4 hours
• 30 minutes (Correct answer)
• 2 hours

Correct answer: 30 minutes

Serum should be separated from the clot within 30 minutes of collection to prevent analyte shifts (e.g., potassium leaking from RBCs, glucose consumption).

Question 136: What is the primary safety concern when performing radiographs on a patient with suspected pneumothorax?

• Contrast medium reaction
• Patient positioning stress exacerbating dyspnea (Correct answer)
• Radiation exposure to staff
• Film fogging from oxygen lines

Correct answer: Patient positioning stress exacerbating dyspnea

Patients with pneumothorax are already dyspneic, and the stress and positioning required for radiography can worsen respiratory compromise or cause decompensation.

Question 137: What shouldn't fluoroquinolones be used in?

• Older animals because they cause arthropathy
• Young animals because they cause arthropathy (Correct answer)
• Growing animals because they cause heart conduction disturbance
• Pregnant animals because they cause abortion

Correct answer: Young animals because they cause arthropathy

Chondrocytes are poisoned by fluoroquinolones. Vesicles are formed by damaged chondrocytes on the surfaces of joints. Arthritis damage from fluoroquinolones is more likely to occur at higher doses. Animals infected develop lameness.

Question 138: What is the purpose of using a grid during radiographic exposure?

• To collimate the primary beam to the area of interest
• To filter out low-energy photons before they reach the patient
• To reduce scatter radiation reaching the image receptor (Correct answer)
• To increase patient dose while reducing exposure time

Correct answer: To reduce scatter radiation reaching the image receptor

A grid absorbs scatter radiation produced within the patient, improving image contrast and reducing fog on the final radiograph.

Question 139: Which inhalant anesthetic has the highest blood:gas partition coefficient among those commonly used?

• Desflurane
• Halothane (Correct answer)
• Sevoflurane
• Isoflurane

Correct answer: Halothane

Halothane has the highest blood:gas partition coefficient (~2.4) among common inhalants, resulting in slower induction and recovery compared to newer agents.

Question 140: Which vaccine adjuvant is most commonly associated with injection-site sarcoma in cats?

• Oil-in-water emulsions
• Modified live virus particles
• Aluminum salts (aluminum hydroxide/phosphate) (Correct answer)
• Carbopol polymer

Correct answer: Aluminum salts (aluminum hydroxide/phosphate)

Aluminum-based adjuvants in killed vaccines are associated with feline injection-site sarcoma (FISS), prompting recommendations to use non-adjuvanted vaccines in cats when possible.

Question 141: The pace at which isotonic replacement crystalloid fluids should be administered intravenously to a dog in compensatory shock is?

• 90 (mL/kg)/hr (Correct answer)
• 30 (mL/kg)/hr
• 60 (mL/kg)/hr
• 45 (mL/kg)/hr

Correct answer: 90 (mL/kg)/hr

Dogs exhibiting compensatory shock or early decompensatory shock should be given 90 mL/kg of isotonic crystalloid replacement fluid per hour. It is standard procedure to provide 1/3 of the volume as a quick bolus before rechecking vital signs (such blood pressure). Give the next third of the volume if the patient is still exhibiting indications of shock, then reevaluate and give the final third if necessary.

Question 142: During an abdominal exploratory, a non-scrubbed circulating nurse accidentally leans over the sterile instrument table, and their arm makes brief contact with a sterile drape covering a section of unused instruments. What is the most appropriate immediate action?

• Immediately notify the surgeon and cover the contaminated drape and instruments with another sterile drape. (Correct answer)
• Ignore the contact as it was brief and unlikely to cause contamination.
• Remove all instruments from the table and replace them with a new sterile pack.
• Spray the area with sterile saline and continue the procedure.

Correct answer: Immediately notify the surgeon and cover the contaminated drape and instruments with another sterile drape.

Any contact between a non-sterile object and a sterile field results in contamination. The correct protocol is to acknowledge the break in asepsis immediately and isolate the contaminated area by covering it with another sterile barrier, thereby preserving the sterility of the rest of the field. Ignoring it is a major breach, and replacing the entire setup is often unnecessary and inefficient if the contamination is localized.

Question 143: A veterinary technician takes a thoracic radiograph of a dyspneic cat without sedation. The resulting image is blurry, and the cardiac silhouette and lung margins are indistinct. This loss of detail is most likely caused by which artifact?

• Grid lines
• Quantum mottle
• Foreshortening
• Motion artifact (Correct answer)

Correct answer: Motion artifact

Motion artifact is a common cause of blurry radiographs and loss of detail. It occurs when the patient moves during the X-ray exposure, which is particularly common in awake, panting, or dyspneic animals. This movement causes the anatomical structures to be recorded across a range of positions, resulting in a blurred image.

Question 144: A common and potentially life-threatening complication during the immediate post-anesthetic recovery period for dogs and cats is:

• Hypertension
• Hyperglycemia
• Hypothermia (Correct answer)
• Polyuria

Correct answer: Hypothermia

Hypothermia is one of the most common complications during anesthesia and recovery. Anesthetic drugs depress the thermoregulatory center in the brain, and patients lose body heat to the environment. Severe hypothermia can lead to prolonged recovery, cardiac arrhythmias, and impaired drug metabolism.

Question 145: Which crystalloid fluid is MOST commonly recommended as the standard maintenance fluid during routine anesthesia in dogs and cats?

• 3% Hypertonic saline
• 0.9% Normal saline
• 5% Dextrose in water (D5W)
• Lactated Ringer's solution (LRS) (Correct answer)

Correct answer: Lactated Ringer's solution (LRS)

Lactated Ringer's solution is the most commonly recommended balanced isotonic crystalloid for routine anesthetic maintenance fluid therapy in small animals.

Question 146: A veterinarian orders 250 mg of cephalexin to be administered orally every 8 hours for 10 days. The in-house pharmacy has 500 mg tablets and 250 mg capsules. To ensure compliance and accurate dosing, which of the following should the veterinary technician dispense?

• 30 capsules, labeled 'Give 1 capsule every 8 hours'
• 30 tablets, labeled 'Give 1 tablet every 8 hours'
• 15 capsules, labeled 'Give 1/2 capsule every 8 hours'
• 15 tablets, labeled 'Give 1/2 tablet every 8 hours' (Correct answer)

Correct answer: 15 tablets, labeled 'Give 1/2 tablet every 8 hours'

The order is for 250 mg, and the 500 mg tablets are scored, allowing them to be accurately split in half to provide the correct 250 mg dose. Dispensing 15 tablets covers the 10-day (30 doses) treatment period (30 doses * 0.5 tablets/dose = 15 tablets). Capsules should not be split, and dispensing whole 500 mg tablets would be an overdose.

Question 147: Which antibiotic is bacteriostatic and works by binding the 30S ribosomal subunit to inhibit protein synthesis?

• Clindamycin
• Amoxicillin
• Enrofloxacin
• Doxycycline (Correct answer)

Correct answer: Doxycycline

Doxycycline (a tetracycline) is bacteriostatic and inhibits bacterial protein synthesis by binding the 30S ribosomal subunit, preventing aminoacyl-tRNA binding.

Question 148: Which alpha-2 adrenergic agonist is most commonly used in small animal anesthesia for sedation and can be reversed with atipamezole?

• Detomidine
• Xylazine
• Dexmedetomidine (Correct answer)
• Romifidine

Correct answer: Dexmedetomidine

Dexmedetomidine is widely used in small animal anesthesia and can be specifically reversed with atipamezole (Antisedan).

Question 149: During ultrasound-guided fine-needle aspiration, the needle appears as a bright hyperechoic line because of:

• The needle's high water content
• Refraction artifact
• Specular reflection of sound waves off the metal surface (Correct answer)
• Acoustic enhancement distal to the needle

Correct answer: Specular reflection of sound waves off the metal surface

The smooth metal surface of the needle acts as a specular reflector, returning nearly all ultrasound energy back to the transducer, creating a bright hyperechoic appearance.

Question 150: What is the mechanism of action of furosemide?

• Blocks aldosterone receptors in the distal tubule
• Blocks sodium channels in the collecting duct
• Inhibits carbonic anhydrase in the proximal tubule
• Inhibits the Na-K-2Cl cotransporter in the loop of Henle (Correct answer)

Correct answer: Inhibits the Na-K-2Cl cotransporter in the loop of Henle

Furosemide is a loop diuretic that inhibits the Na-K-2Cl cotransporter in the ascending limb of the loop of Henle, reducing sodium and water reabsorption.

Question 151: A serum chemistry panel shows markedly elevated ALT and AST with only mildly elevated ALP in a dog. This pattern most suggests:

• Primary bone disease
• Pancreatic disease
• Hepatocellular damage (Correct answer)
• Cholestasis

Correct answer: Hepatocellular damage

ALT and AST are hepatocellular enzymes; marked elevation of both with minimal ALP elevation is most consistent with hepatocellular injury rather than cholestasis.

Question 152: A rabbit is to receive enrofloxacin 5 mg/kg SID. The rabbit weighs 2.2 kg. The available concentration is 22.7 mg/mL. How many mL per dose?

• 0.25 mL
• 0.48 mL (Correct answer)
• 0.40 mL
• 0.50 mL

Correct answer: 0.48 mL

2.2 kg × 5 mg/kg = 11 mg; 11 mg ÷ 22.7 mg/mL ≈ 0.48 mL.

Question 153: Which organ is considered the acoustic window used to visualize the heart during echocardiography in most small animals?

• Lung
• Liver
• Chest wall and intercostal spaces (Correct answer)
• Spleen

Correct answer: Chest wall and intercostal spaces

The ultrasound probe is placed in the intercostal spaces of the chest wall where air-filled lungs are displaced, providing a direct acoustic window to the heart.

Question 154: A double-contrast gastrogram is performed by introducing iodinated contrast followed by air. The purpose of the air is to:

• Dilute the iodinated contrast
• Reduce peristalsis
• Distend the stomach lumen to coat the mucosal surface with contrast (Correct answer)
• Lower the risk of aspiration

Correct answer: Distend the stomach lumen to coat the mucosal surface with contrast

Air distends the stomach so that the positive contrast agent coats the mucosal folds, allowing mucosal detail and wall lesions (e.g., ulcers, masses) to be seen clearly.

Question 155: A surgical patient develops a temperature of 40.5°C (104.9°F) 36 hours after surgery. Which post-operative complication should be considered FIRST?

• Hypothyroidism
• Malignant hyperthermia
• Surgical site infection (Correct answer)
• Anesthetic reaction

Correct answer: Surgical site infection

Fever developing 24–72 hours post-operatively is classically associated with surgical site infection or systemic infection.

Question 156: Which of the following instruments is classified as a needle holder?

• Allis
• Gelpi
• Metzenbaum
• Mayo-Hegar (Correct answer)

Correct answer: Mayo-Hegar

The Mayo-Hegar needle holder is a standard needle driver used to grasp and pass suture needles through tissue during wound closure.

Question 157: Which of the following correctly describes the purpose of a surgical lavage during an abdominal procedure?

• To irrigate the abdominal cavity to dilute and remove contamination (Correct answer)
• To test for intestinal leaks post-anastomosis
• To cool the abdominal organs during prolonged surgery
• To hydrate the patient intraoperatively

Correct answer: To irrigate the abdominal cavity to dilute and remove contamination

Surgical lavage uses warm sterile saline to dilute bacteria and debris from the abdominal cavity, reducing the risk of septic peritonitis.

Question 158: Which fecal egg flotation solution has the highest specific gravity and is best for recovering heavy parasite eggs such as Taenia spp.?

• Zinc sulfate (SG 1.18)
• Sodium chloride (SG 1.20)
• Sugar (Sheather's) solution (SG 1.27) (Correct answer)
• Sodium nitrate (SG 1.20)

Correct answer: Sugar (Sheather's) solution (SG 1.27)

Sheather's sugar solution has a specific gravity of approximately 1.27, making it capable of floating heavier eggs including tapeworm eggs that may sink in lower SG solutions.

Question 159: Which opioid is considered a full mu-receptor agonist and is commonly used intraoperatively as a constant rate infusion (CRI) for analgesia?

• Buprenorphine
• Butorphanol
• Fentanyl (Correct answer)
• Naloxone

Correct answer: Fentanyl

Fentanyl is a potent full mu-agonist with rapid onset and short duration, making it ideal for intraoperative CRI analgesia.

Question 160: A patient recovering from anesthesia is shivering. Why is postanesthetic shivering clinically significant?

• It confirms the patient is in a light plane of anesthesia
• It is a normal finding with no clinical consequence
• It indicates adequate pain control
• It increases oxygen consumption and cardiac workload (Correct answer)

Correct answer: It increases oxygen consumption and cardiac workload

Shivering significantly increases oxygen demand and metabolic rate, which can be dangerous in compromised cardiac or respiratory patients.

Question 161: The term 'regenerative anemia' in veterinary hematology means the bone marrow is responding by releasing:

• Eosinophils into circulation
• Platelets at an accelerated rate
• Immature red blood cells (reticulocytes) (Correct answer)
• Mature neutrophils in excess

Correct answer: Immature red blood cells (reticulocytes)

In regenerative anemia, the bone marrow releases reticulocytes (immature RBCs) into circulation as a compensatory response to RBC loss or destruction.

Question 162: According to the most recent RECOVER guidelines for veterinary CPR, what is the recommended rate and depth for chest compressions in most dogs and cats?

• 100-120 compressions per minute, compressing the chest by 1/3 to 1/2 its width. (Correct answer)
• 80-100 compressions per minute, compressing the chest by 1/4 to 1/3 its width.
• 120-150 compressions per minute, compressing the chest by 1/2 to 2/3 its width.
• 60-80 compressions per minute, compressing the chest by at least 1/2 its width.

Correct answer: 100-120 compressions per minute, compressing the chest by 1/3 to 1/2 its width.

The RECOVER (Reassessment Campaign on Veterinary Resuscitation) initiative has established evidence-based guidelines for CPR. The recommended rate for chest compressions is 100-120 per minute, and the depth should be 1/3 to 1/2 the width of the chest, allowing for full chest recoil between compressions.

Question 163: Which of the following statements DOES NOT describe strangles?

• In dogs, it is also known as distemper (Correct answer)
• A bacterial disease of horses that can be prevented with vaccination
• An autoimmune disease of dogs causing a skin disorder
• A contagious disease of horses caused by Streptococcus equi var equi

Correct answer: In dogs, it is also known as distemper

Streptococcus equi var equi can be transmitted directly or indirectly and causes an inflammatory response that results in fever, dysphagia, anorexia, stridor, nasal discharge, and lymphadenopathy, though associated symptoms are not always present. Vaccines are available and advised where strangles is endemic or when horses are expected to be at high risk. Puppy strangles, also known as juvenile cellulitis, sterile granulomatous dermatitis, and lymphadenitis, is a rare immune system disorder that affects pups between the ages of 3 weeks and 4 months. The face swells noticeably. The disease requires high doses of corticosteroids to be treated. The illness does not return after it has been treated. Canine distemper is not bacterial; it is viral.

Question 164: Which of the following is an example of a compounded medication in veterinary medicine?

• An FDA-approved injectable solution drawn into a syringe
• A commercially available antibiotic tablet given at the labeled dose
• A flavored liquid suspension made from a tablet for a cat that refuses pills (Correct answer)
• A human drug used at its human labeled dose in a dog

Correct answer: A flavored liquid suspension made from a tablet for a cat that refuses pills

Compounding involves preparing a customized formulation (such as a flavored liquid) from an existing drug when a commercially suitable form is unavailable.

Question 165: Which radiographic view is best for evaluating intervertebral disc disease in the thoracolumbar spine of a dog?

• Lateral recumbent (Correct answer)
• Dorsoventral
• Oblique
• Ventrodorsal

Correct answer: Lateral recumbent

The lateral recumbent view provides the best visualization of intervertebral disc spaces and any narrowing or mineralization in the thoracolumbar spine.

Question 166: A 20 kg dog is assessed to be 10% dehydrated. What is the calculated fluid deficit that should be replaced?

• 500 mL
• 200 mL
• 20 mL
• 2,000 mL (Correct answer)

Correct answer: 2,000 mL

Fluid deficit = body weight (kg) × % dehydration × 1,000 mL = 20 × 0.10 × 1,000 = 2,000 mL.

Question 167: A 10 kg dog is diagnosed with severe dehydration and hypovolemic shock. The veterinarian orders an initial fluid bolus of isotonic crystalloids to be administered over 15 minutes. Based on standard resuscitation protocols, what is the most appropriate volume for this initial bolus?

• 100 mL
• 900 mL
• 500 mL
• 225 mL (Correct answer)

Correct answer: 225 mL

The standard shock dose of isotonic crystalloids for a dog is approximately 90 mL/kg. The total shock volume for a 10 kg dog would be 900 mL. An initial bolus is typically one-quarter (1/4) of the total shock dose. Therefore, 900 mL / 4 = 225 mL. This initial bolus is given rapidly, usually over 15-20 minutes, before the patient is reassessed.

Question 168: A urine specific gravity of 1.045 in a dog most likely indicates:

• Diabetes insipidus
• Concentrated urine with possible dehydration (Correct answer)
• Hyposthenuria
• Isosthenuria

Correct answer: Concentrated urine with possible dehydration

A specific gravity of 1.045 is highly concentrated and may indicate dehydration or renal compensatory response in dogs.

Question 169: A 7-year-old Doberman Pinscher presents for collapse. An ECG reveals a heart rate of 180 bpm with wide, bizarre QRS complexes that do not have associated P waves. This arrhythmia is best identified as:

• Third-degree AV block
• Sinus tachycardia
• Atrial fibrillation
• Ventricular tachycardia (Correct answer)

Correct answer: Ventricular tachycardia

Ventricular tachycardia (V-tach) is a life-threatening arrhythmia characterized by a rapid heart rate originating from an ectopic focus within the ventricles. The classic ECG findings are a rapid rate with wide and bizarrely shaped QRS complexes and a lack of association with P waves (AV dissociation).

Question 170: A radiograph shows increased opacity in the lung fields with an air bronchogram sign. This finding is MOST consistent with:

• Vascular congestion only
• Pneumothorax
• Pleural effusion
• Alveolar lung disease (Correct answer)

Correct answer: Alveolar lung disease

Air bronchograms form when fluid or soft tissue fills the alveoli but air remains in the bronchi, creating a visible bronchial pattern — classic for alveolar (consolidating) lung disease.

Question 171: Which of the following drugs is classified as a phenothiazine tranquilizer used in veterinary medicine?

• Acepromazine (Correct answer)
• Xylazine
• Ketamine
• Medetomidine

Correct answer: Acepromazine

Acepromazine is a phenothiazine derivative used as a sedative and preanesthetic tranquilizer in veterinary patients.

Question 172: Which of the following is NOT a clause in the code of ethics for veterinary technicians?

• “Veterinary technicians shall remain competent through commitment to life-long learning.”
• “Veterinary technicians shall assume accountability for their professional actions as well as those with whom they work.” (Correct answer)
• “Veterinary technicians shall safeguard the public and the profession against individuals deficient in professional competence or ethics.”
• “Veterinary technicians shall represent their credentials or identify themselves with specialty organizations only if the designation has been awarded or earned.”

Correct answer: “Veterinary technicians shall assume accountability for their professional actions as well as those with whom they work.”

The obligations, ethical responsibilities, and ideals of veterinary technicians are covered in full in the NAVTA Veterinary Technician Code of Ethics. The NAVTA Ethics Committee created the eleven statements that make up the Code of Ethics. Correctly translated, the sentence says, "Veterinary technicians shall assume accountability for individual professional actions and judgments."

Question 173: A sample for blood glucose measurement is collected in a gray-top tube. What additive does it contain?

• Lithium heparin
• Sodium fluoride and potassium oxalate (Correct answer)
• Sodium citrate
• EDTA and thrombin

Correct answer: Sodium fluoride and potassium oxalate

Gray-top tubes contain sodium fluoride (a glycolytic inhibitor) and potassium oxalate (an anticoagulant), preserving glucose levels for accurate measurement.

Question 174: What is the recommended action if a patient shows signs of a contrast reaction (vomiting, urticaria, hypotension) during an IV urogram?

• Discontinue contrast administration and treat symptomatically (Correct answer)
• Increase the injection rate to speed up the study
• Administer more contrast to flush the kidneys
• Continue the study and monitor

Correct answer: Discontinue contrast administration and treat symptomatically

Signs of contrast reaction require immediate discontinuation of the contrast agent and symptomatic treatment including IV fluids, antihistamines, and epinephrine if anaphylaxis develops.

Question 175: Fluoroscopy is most appropriate for evaluating which of the following conditions?

• Bone density and cortical integrity
• Static cardiac chamber dimensions
• Real-time swallowing function (esophagram) (Correct answer)
• Renal cortical thickness

Correct answer: Real-time swallowing function (esophagram)

Fluoroscopy provides real-time dynamic imaging, making it ideal for evaluating swallowing mechanics, esophageal motility, and contrast agent movement through the GI tract.

Question 176: When performing a bone marrow biopsy cytology evaluation, a myeloid:erythroid (M:E) ratio greater than 3:1 suggests:

• Pure red cell aplasia
• Granulocytic hyperplasia or erythroid hypoplasia (Correct answer)
• Megakaryocyte hypoplasia
• Erythroid hyperplasia

Correct answer: Granulocytic hyperplasia or erythroid hypoplasia

A high M:E ratio (>3:1) indicates either increased granulocytic production (e.g., infection, inflammation) or decreased erythroid production.

Question 177: A 4-year-old Golden Retriever is scheduled for a tibial plateau leveling osteotomy (TPLO) on its right hind limb. When preparing the surgical site, what is the most appropriate area to clip and aseptically prepare?

• The area from the stifle to the foot, including the paw.
• A full circumferential clip from the level of the hip to the tarsus. (Correct answer)
• A small square patch directly over the stifle joint.
• From the mid-femur to the mid-tibia, clipping only the lateral aspect.

Correct answer: A full circumferential clip from the level of the hip to the tarsus.

Orthopedic procedures like a TPLO require a very large and wide sterile field to allow for manipulation of the limb during surgery and to minimize the risk of contamination. The standard practice is to perform a full circumferential clip from the joint above (hip/coxofemoral joint) to the joint below (hock/tarsus).

Question 178: Which urinalysis finding is MOST consistent with a urinary tract infection (UTI)?

• Hyposthenuria with no cells
• Glucosuria with ketonuria
• Pyuria, bacteriuria, and hematuria (Correct answer)
• Presence of granular casts only

Correct answer: Pyuria, bacteriuria, and hematuria

Pyuria (WBCs in urine), bacteriuria, and hematuria together strongly indicate an active bacterial urinary tract infection.

Question 179: A cat anesthetized with isoflurane develops a heart rate of 240 bpm. Which drug is most appropriate to treat this tachycardia?

• Dexmedetomidine (Correct answer)
• Atropine
• Dopamine
• Epinephrine

Correct answer: Dexmedetomidine

Dexmedetomidine causes bradycardia via alpha-2 agonism and can be used to slow an anesthetic-induced tachycardia in cats.

Question 180: What is the normal gingival sulcus depth in a healthy cat?

• 1–3 mm (Correct answer)
• 3–5 mm
• 5–7 mm
• 0–1 mm

Correct answer: 1–3 mm

In cats, a normal gingival sulcus depth is 0–1 mm; depths greater than 1 mm suggest periodontal pocketing.

Question 181: Which QC procedure should be performed each time a new lot of reagent strips is opened for urinalysis?

• Run a serum control sample
• Recalibrate the spectrophotometer
• Run positive and negative control solutions (Correct answer)
• Perform a specific gravity comparison with a refractometer

Correct answer: Run positive and negative control solutions

Running both positive and negative controls verifies that the new reagent strip lot is performing correctly before patient samples are tested.

Question 182: What are the standard time, temperature, and pressure settings for sterilizing most routine surgical packs in a gravity-displacement steam autoclave?

• 20 minutes at 100°C (212°F) and 20 psi
• 5 minutes at 132°C (270°F) and 30 psi
• 10 minutes at 115°C (240°F) and 10 psi
• 15 minutes at 121°C (250°F) and 15 psi (Correct answer)

Correct answer: 15 minutes at 121°C (250°F) and 15 psi

The generally accepted standard for steam sterilization in a gravity-displacement autoclave is exposure to 121°C (250°F) at a pressure of 15 psi for a minimum of 13-15 minutes. The 5-minute cycle is typically reserved for "flash" sterilization of unwrapped instruments in a pre-vacuum sterilizer.

Question 183: Which instrument is used to retract and hold open the edges of a surgical incision to improve visualization of deeper structures?

• Thumb forceps
• Metzenbaum scissors
• Mayo scissors
• Gelpi retractor (Correct answer)

Correct answer: Gelpi retractor

The Gelpi retractor is a self-retaining instrument with sharp prongs that hold wound edges apart, providing hands-free exposure of deeper tissues.

Question 184: Which of the following fecal flotation solutions has the highest specific gravity and is therefore most effective at floating heavy parasite eggs, such as Trichuris vulpis?

• Sodium chloride solution
• Sheather's sugar solution (Correct answer)
• Sodium nitrate solution
• Zinc sulfate solution

Correct answer: Sheather's sugar solution

Sheather's sugar solution typically has a specific gravity of around 1.27, which is higher than most standard salt solutions like zinc sulfate (1.18-1.20) or sodium nitrate (1.18-1.20). This higher density is more effective for floating heavier parasite eggs, like those of the whipworm (Trichuris spp.), which might be missed with solutions of lower specific gravity.

Question 185: What does a PaO2 of 60 mmHg indicate in a patient breathing 100% oxygen?

• Normal oxygenation
• Severe respiratory impairment (Correct answer)
• Mild hypoxemia
• Acceptable for induction

Correct answer: Severe respiratory impairment

A PaO2 of 60 mmHg while breathing 100% oxygen indicates severe pulmonary dysfunction, as a normal patient should achieve PaO2 values of 450–600 mmHg.

Question 186: Which of the following describes the Guedel classification Stage III, Plane 2 of anesthesia?

• Excitement, breath-holding, and struggling
• Loss of consciousness with retained reflexes
• Surgical anesthesia with regular respiration and loss of palpebral reflex (Correct answer)
• Respiratory arrest with fixed dilated pupils

Correct answer: Surgical anesthesia with regular respiration and loss of palpebral reflex

Stage III, Plane 2 represents surgical anesthesia characterized by regular respiration, loss of the palpebral reflex, and absent response to surgical stimulation.

Question 187: An 8-year-old Poodle with a history of congestive heart failure and a significant heart murmur is scheduled for a mass removal. According to the American Society of Anesthesiologists (ASA) physical status classification system, which grade is most appropriate for this patient?

• ASA V
• ASA I
• ASA IV (Correct answer)
• ASA II

Correct answer: ASA IV

The ASA physical status classification system grades a patient's pre-anesthetic risk. An ASA IV classification is for a patient with severe systemic disease that is a constant threat to life. A dog with decompensated heart disease fits this category, signifying a high anesthetic risk that requires advanced planning and monitoring.

Question 188: A dog has a suspected portosystemic shunt. Which imaging modality provides the MOST definitive pre-surgical mapping of shunt vasculature?

• Survey abdominal radiography
• Abdominal ultrasound with Doppler
• CT angiography (Correct answer)
• Nuclear scintigraphy

Correct answer: CT angiography

CT angiography provides three-dimensional vascular mapping with high spatial resolution, allowing precise identification of shunt location, number, and anatomy critical for surgical planning.

Question 189: A patient undergoing abdominal surgery has a heart rate of 140 bpm and pale mucous membranes. The FIRST priority action by the veterinary technician is to:

• Increase the anesthetic depth
• Reposition the patient
• Alert the surgeon and prepare IV fluids (Correct answer)
• Apply warming blankets

Correct answer: Alert the surgeon and prepare IV fluids

Tachycardia with pale mucous membranes suggests hemorrhagic shock, requiring immediate communication with the surgeon and fluid resuscitation.

Question 190: Which of the following is a reversal agent for benzodiazepine sedation?

• Atipamezole
• Yohimbine
• Flumazenil (Correct answer)
• Naloxone

Correct answer: Flumazenil

Flumazenil competitively antagonizes benzodiazepine receptors and can reverse sedation caused by diazepam or midazolam.

Question 191: A veterinary technician produces a radiograph of a large dog's abdomen that appears gray and has very low contrast, obscuring detail. The patient measured 15 cm at the level of the umbilicus. Which of the following is the most likely cause and solution for this poor image quality?

• Underexposure; the milliamperage-seconds (mAs) should be increased.
• Foreshortening; the x-ray beam was not perpendicular to the cassette.
• Scatter radiation; a grid should be used for the retake. (Correct answer)
• Motion artifact; the patient should be sedated for a retake.

Correct answer: Scatter radiation; a grid should be used for the retake.

For body parts measuring 10 cm or greater in thickness, significant scatter radiation is produced, which degrades image quality by reducing contrast and creating a foggy appearance. Using a grid absorbs this scatter before it reaches the image receptor, resulting in a higher-contrast, more detailed image.

Question 192: Which antiparasitic drug works by disrupting the nervous system of invertebrates by potentiating glutamate-gated chloride channels?

• Praziquantel
• Pyrantel pamoate
• Ivermectin (Correct answer)
• Fenbendazole

Correct answer: Ivermectin

Ivermectin (a macrocyclic lactone) potentiates glutamate-gated chloride channels in invertebrates, causing hyperpolarization and paralysis of parasites.

Question 193: A veterinary technician notices that a sterile instrument tray was opened on the back table and then left unattended for 45 minutes while the team attended to a patient emergency. What should be done?

• Use the tray if it was not touched during the waiting period
• Consider the field contaminated and re-sterilize or replace all items (Correct answer)
• Re-sterilize only the instruments that were near the edge of the field
• Cover the tray with a sterile drape and use it immediately

Correct answer: Consider the field contaminated and re-sterilize or replace all items

An unattended sterile field cannot be guaranteed to remain sterile; all items must be considered contaminated and replaced before surgery proceeds.

Question 194: Which adverse effect is most associated with chronic NSAID use in dogs?

• Respiratory depression
• Gastrointestinal ulceration (Correct answer)
• Cardiac arrhythmias
• Hyperthyroidism

Correct answer: Gastrointestinal ulceration

Chronic NSAID use inhibits COX-1, reducing protective prostaglandins in the GI tract and predisposing patients to ulcers.

Question 195: What does a left shift on a CBC indicate?

• Presence of immature neutrophils (bands) in peripheral blood (Correct answer)
• Decreased platelet count
• Increased mature lymphocytes in circulation
• Shift of red blood cells to the left side of the smear

Correct answer: Presence of immature neutrophils (bands) in peripheral blood

A left shift refers to the release of immature neutrophils (band cells and earlier forms) into the circulation, suggesting significant demand or bone marrow response.

Question 196: Which of the following best describes 'balanced anesthesia'?

• Maintaining equal inhalant concentration throughout the procedure
• Combining multiple drug classes to provide analgesia, sedation, and muscle relaxation while minimizing individual drug doses (Correct answer)
• Using equal doses of two inhalant agents simultaneously
• Using the same drug protocol regardless of patient species

Correct answer: Combining multiple drug classes to provide analgesia, sedation, and muscle relaxation while minimizing individual drug doses

Balanced anesthesia combines analgesics, sedatives, and muscle relaxants at lower individual doses to achieve better anesthesia with fewer side effects than relying on a single agent.

Question 197: A veterinarian prescribes Clomicalm® (clomipramine hydrochloride) for a dog with separation anxiety. Which of the following is a potential side effect that the owner should be counseled about?

• Hyperactivity
• Polyphagia
• Increased aggression
• Lethargy or sedation (Correct answer)

Correct answer: Lethargy or sedation

Clomipramine is a tricyclic antidepressant. One of the most common side effects, especially during the initial phase of treatment, is lethargy or sedation. While other side effects like vomiting or changes in appetite can occur, sedation is frequently observed as the animal adjusts to the medication. Increased aggression is not a typical side effect and the drug is not recommended for treating aggression.

Question 198: Which type of drug interaction occurs when two drugs compete for the same plasma protein binding sites, potentially increasing free drug levels?

• Pharmacodynamic synergism
• Protein binding displacement (Correct answer)
• Receptor downregulation
• Enzyme induction

Correct answer: Protein binding displacement

Protein binding displacement occurs when one drug displaces another from albumin binding sites, increasing the free (active) concentration of the displaced drug.

Question 199: Why is dental polishing performed after ultrasonic scaling in veterinary dental procedures?

• To apply fluoride treatment
• To check for fractures
• To whiten the teeth cosmetically
• To smooth enamel micro-scratches and reduce plaque adhesion (Correct answer)

Correct answer: To smooth enamel micro-scratches and reduce plaque adhesion

Polishing smooths the micro-scratches left by scaling instruments, creating a surface less hospitable to bacterial plaque adhesion.

Question 200: In urinalysis, the presence of bilirubin in a cat's urine is considered:

• Only significant if accompanied by glucosuria
• Normal only in male cats
• Normal up to 3+ in cats
• Always abnormal and clinically significant (Correct answer)

Correct answer: Always abnormal and clinically significant

Unlike dogs, cats have a very high renal threshold for bilirubin, so any bilirubinuria in cats is considered abnormal and clinically significant.

Question 201: A dog presents to the emergency service after ingesting a large amount of dark chocolate. Which of the following clinical signs is most commonly associated with methylxanthine toxicity?

• Bradycardia and lethargy
• Hypothermia and ataxia
• Anemia and jaundice
• Tachycardia and hyperactivity (Correct answer)

Correct answer: Tachycardia and hyperactivity

The toxic compounds in chocolate are methylxanthines (theobromine and caffeine), which act as stimulants. They primarily affect the central nervous and cardiovascular systems, leading to signs such as restlessness, hyperactivity, tremors, tachycardia, and arrhythmias.

Question 202: In ultrasound terminology, a structure that appears brighter (whiter) than surrounding tissue is described as:

• Hyperechoic (Correct answer)
• Hypoechoic
• Isoechoic
• Anechoic

Correct answer: Hyperechoic

Hyperechoic structures reflect more sound waves back to the transducer, appearing brighter white relative to surrounding tissue on the ultrasound image.