Free Certified Phlebotomy Technician (CPT): Specimen Collection Questions and Answers — Questions and Answers

Question 1: What is the circulatory system's primary purpose?

Receives blood supply from the body
Returns deoxygenated blood from tissues
To pump blood
Carries oxygen and food to the cells of the body (Correct answer)

Correct answer: Carries oxygen and food to the cells of the body

The circulatory system, primarily composed of the heart, blood vessels, and blood, is responsible for transporting essential substances throughout the body. Its main purpose is to deliver oxygen and nutrients to all body cells and remove waste products like carbon dioxide. This continuous circulation is vital for cellular metabolism and overall bodily function.

Question 2: Which two of the following are the circulatory system's primary purposes?

Pulmonary circulation and systemic circulation
Lymphatic vessels and Lymph nodes
Cardiovascular system and lymphatic system (Correct answer)
Heart and Blood vessels

Correct answer: Cardiovascular system and lymphatic system

The circulatory system is broadly divided into two main components: the cardiovascular system and the lymphatic system. The cardiovascular system circulates blood, oxygen, and nutrients, while the lymphatic system collects excess fluid, filters waste, and plays a crucial role in immune function. These two systems work in conjunction to maintain fluid balance and transport substances throughout the body.

Question 3: How much blood does a human body typically contain?

5 Liters (Correct answer)
8 Liters
2 Liters
10 Liters

Correct answer: 5 Liters

The average adult human body typically contains approximately 4.5 to 5.5 liters of blood. This volume constitutes about 7-8% of total body weight and is essential for maintaining blood pressure, transporting substances like oxygen and nutrients, and regulating body temperature.

Question 4: There are various techniques for drawing blood from a patient. What kind of blood collection procedure is most typical?

Hand
Arterial
Venous (Correct answer)
Foot

Correct answer: Venous

Venous blood collection, or venipuncture, is the most common and typical method for drawing blood samples for diagnostic testing. It involves drawing blood from a vein, usually in the arm, because veins are easily accessible, have lower pressure than arteries, and provide sufficient blood volume for most laboratory tests.

Question 5: The integrity of the specimen is crucial. Which of the following can compromise the integrity of the specimen?

Method of transport (Correct answer)
Time of collection
Initials of specimen collector
Hemolyzed specimens

Correct answer: Method of transport

The method of transport can significantly compromise specimen integrity, leading to inaccurate test results. Factors such as extreme temperatures, excessive agitation, or delays in transport can cause hemolysis, cellular degradation, or alteration of analytes within the specimen. Adhering to proper transport protocols is essential to maintain the specimen's quality and ensure reliable diagnostic outcomes.

Question 6: The description of each sort of blood draw is different. What word best sums up a Venus blood test?

Blood is bright red, pulsating flow, and harder to control.
Blood is bright red, flow is pulsating, and easily controlled.
Flow is slow and even, easily controlled.
Blood is dark red, flow is steady and easily controlled. (Correct answer)

Correct answer: Blood is dark red, flow is steady and easily controlled.

Venous blood is deoxygenated, giving it a darker red color compared to arterial blood. When a vein is punctured, the blood flow is typically steady and even, not pulsating, and is generally easy to control. This contrasts with arterial blood, which is bright red, pulsates, and is harder to control due to higher pressure.

Question 7: Hemolyzing blood samples is a simple process. What is a sample that has been hemolyzed?

When RBCs are lysed (Correct answer)
Increased WBC's
Improper phlebotomy techniques
Increased fats and lipids

Correct answer: When RBCs are lysed

Hemolysis refers to the rupture or destruction of red blood cells (RBCs), which releases hemoglobin into the surrounding plasma or serum. This can occur due to improper phlebotomy techniques, incorrect specimen handling, or certain medical conditions. Hemolyzed specimens appear pink or red and can interfere with the accuracy of many laboratory tests.

Question 8: Specimens may potentially be lipemic due to the health of the patient. A lipemic sample is defined as?

Deep yellow, brown, or green
A thickened buffy coat
Pink or red in color
Hazy, opaque, or milky white (Correct answer)

Correct answer: Hazy, opaque, or milky white

A lipemic sample appears hazy, opaque, or milky white due to a high concentration of lipids, typically triglycerides, in the blood. This condition often occurs when a patient has not fasted before a blood draw or has certain metabolic disorders. Lipemia can interfere with various laboratory tests, similar to how hemolysis affects results.

Question 9: What are the four guidelines for specimen collection?

Amount, money, etc
Right specimen, time, amount and container (Correct answer)
Temperature, state and amount
All of the above

Correct answer: Right specimen, time, amount and container

The four key guidelines for specimen collection to ensure accurate results are: collecting the right specimen type, at the correct time (e.g., fasting, timed), in the appropriate amount, and using the correct container with the proper additives. Adhering to these guidelines is crucial for diagnostic accuracy, patient safety, and preventing the need for recollection.

Question 10: When should you wash your hands after taking a sample?

Before and after (Correct answer)
Only after
Only before
None of the above

Correct answer: Before and after

Hand hygiene is a fundamental principle of infection control in healthcare. Phlebotomists must wash their hands or use an alcohol-based hand rub both before and after contact with each patient, before and after wearing gloves, and before and after handling specimens. This practice prevents the spread of microorganisms and protects both the patient and the healthcare worker.

Question 11: When should gloves be worn?

Before only touching the patient
Before only touching the specimen
Before touching bedpan, patient, or specimen (Correct answer)
None of the above

Correct answer: Before touching bedpan, patient, or specimen

Gloves are a crucial component of standard precautions and should be worn whenever there is a potential for contact with blood, body fluids, non-intact skin, or contaminated items. This includes before touching a patient, handling a bedpan, or collecting and handling specimens. Wearing gloves protects both the healthcare worker and the patient from pathogen transmission.

Question 12: A standard specimen needs to be taken:

Anytime (Correct answer)
At 7 a.m.
First thing when the client awakens
Before a meal

Correct answer: Anytime

A 'standard specimen' typically refers to a routine blood draw that does not require specific timing relative to meals or time of day, unlike fasting blood tests or timed medication levels. Therefore, it can be taken at any time during the day. This flexibility allows for convenience in scheduling routine lab work.

Question 13: What happens to the urine collected on the first day at 7 a.m. of a 24-hour urine sample?

Scale
Saved
Discard (Correct answer)
None of the above

Correct answer: Discard

When collecting a 24-hour urine sample, the first urine voided at the start of the collection period (e.g., 7 a.m. on day one) is discarded. This ensures that the collection begins with an empty bladder, and all subsequent urine produced over the next 24 hours is included. Discarding the initial void provides an accurate measure of substances excreted over that specific timeframe.

Question 14: When obtaining a sample of 24-hour urine: What is the biggest potential issue with removing urine from an implanted Foley catheter?

Incorrect amount of specimen collected
Urinary infection from contamination (Correct answer)
Incorrect dilution of the specimen
None of the above

Correct answer: Urinary infection from contamination

The biggest potential issue with removing urine from an implanted Foley catheter for a 24-hour collection is the risk of contamination, which can lead to a urinary infection. Breaking the closed system of the catheter to collect urine introduces a pathway for bacteria to enter the urinary tract. Therefore, specific sterile techniques are required, or urine is collected from the port to minimize this risk.

Question 15: What happens to the pee that was taken at 7 a.m. on the final day of a 24-hour urine sample?

Discarded
Dilute
Saved (Correct answer)
None of the above

Correct answer: Saved

For a 24-hour urine collection, the final urine voided at the end of the 24-hour period (e.g., 7 a.m. on the final day) must be saved and added to the collection. This ensures that all urine produced within the exact 24-hour timeframe is included. Saving this last sample makes the total volume and analyte measurements accurate and representative of the full collection period.

Question 16: In order to create a specimen, _______________ of stool is required.

2 ml
2 kg
1-2 tbsp (Correct answer)
2 g

Correct answer: 1-2 tbsp

For most stool specimens, a sufficient amount for laboratory analysis is typically 1-2 tablespoons, or approximately 30-60 mL if liquid. This quantity allows for adequate testing to be performed by the laboratory while not requiring an excessively large or inconvenient sample from the patient.

Free Certified Phlebotomy Technician (CPT): Specimen Collection Questions and Answers

What is the circulatory system's primary purpose?