Mixed Deck — All CSFA Topics Flashcards

During an appendectomy via McBurney's incision, which three muscle layers are split in sequence after incising the skin?

Answer: External oblique, internal oblique, transversus abdominis

The McBurney incision splits the external oblique aponeurosis, then bluntly splits the internal oblique and transversus abdominis muscle fibers.

In vascular surgery, which action by the surgical first assistant best prevents intimal injury when handling a vessel graft?

Answer: Handling only the adventitial surface and avoiding forceps on the intimal surface

Intimal injury promotes thrombosis; grafts should be handled by the outer adventitia only to preserve the inner lining.

The surgical first assistant is asked to irrigate the peritoneal cavity at the end of a bowel resection. Which irrigant is most appropriate?

Answer: Warm normal saline or Ringer's lactate

Warm isotonic saline or Ringer's lactate effectively dilutes contaminants without damaging peritoneal tissue.

The scrub person and circulator are performing the final count for a major abdominal procedure. A single ray-tec sponge is missing. After a thorough search of the sterile field, linen, and trash, it is not found. What is the most appropriate next step?

Answer: The surgeon performs a manual exploration of the wound while an intraoperative x-ray is ordered.

When a surgical item is missing and cannot be located after a thorough search, the surgeon must be notified to perform a manual exploration of the wound. Concurrently, an intraoperative x-ray must be ordered to rule out a retained foreign body before the final closure of the wound cavity.

The surgical skin preparation (prep) area should extend well beyond the anticipated incision site in order to:

Answer: Provide a sterile margin if incision boundaries need to change during surgery

Prepping a wide area beyond the planned incision provides a margin of sterility in case the incision must be extended or additional access sites are needed unexpectedly.

Topical thrombin works by converting which clotting factor to its active form?

Answer: Fibrinogen

Topical thrombin directly converts fibrinogen to fibrin, forming a clot at the site of application.

A critical, non-porous, non-lumened surgical instrument is accidentally dropped on the floor mid-procedure. The surgeon states it is urgently needed to complete the case. According to AORN and AAMI guidelines, what is the most appropriate course of action?

Answer: Process the instrument using an Immediate-Use Steam Sterilization (IUSS) cycle, ensuring it is first cleaned, placed in a validated rigid container, and transported aseptically.

Immediate-Use Steam Sterilization (IUSS), formerly known as 'flash sterilization,' should be kept to a minimum and used only in urgent situations. The complete, proper procedure must be followed, which includes thorough cleaning and decontamination, placement in a closed, rigid sterilization container validated for IUSS, running the manufacturer-specified cycle, and aseptic transfer to the sterile field.

Which fascial layer encloses the thyroid gland and forms a surgical plane separating it from the strap muscles?

Answer: Pretracheal fascia

The pretracheal (middle cervical) fascia envelops the thyroid gland as a true surgical capsule and forms the anatomical plane used when retracting strap muscles during thyroidectomy.

The triangle of Calot, critical for safe cholecystectomy, is bounded superiorly by which structure?

Answer: Liver (visceral surface)

The triangle of Calot is bounded superiorly by the visceral surface of the liver, medially by the common hepatic duct, and inferiorly by the cystic duct.

Following a laparoscopic cholecystectomy, a patient complains of severe right shoulder pain. What is the most likely cause?

Answer: Referred pain from residual CO2 irritating the diaphragm

Residual carbon dioxide trapped under the diaphragm causes phrenic nerve irritation, which refers pain to the shoulder tip postoperatively.

A patient undergoing open abdominal surgery develops a sudden drop in SpO2 and elevated peak airway pressures. The surgical first assistant should first:

Answer: Notify the anesthesia provider immediately

Sudden SpO2 drop with elevated airway pressures suggests a ventilatory emergency requiring immediate anesthesia intervention.

Immediate-use steam sterilization (IUSS), formerly called 'flash sterilization,' should be used:

Answer: Only as a last resort for an item needed immediately that cannot be processed otherwise

IUSS is intended only as a last resort when no sterile alternative is available, not as routine practice due to the lack of full quality controls.

Which benzodiazepine is most commonly used for preoperative anxiolysis and procedural sedation due to its short duration and amnestic properties?

Answer: Midazolam

Midazolam is preferred for perioperative use because of its short half-life, reliable anxiolysis, and potent anterograde amnesia.

The surgical first assistant is controlling hemorrhage from a mesenteric vessel. Which maneuver provides immediate proximal control?

Answer: Digital pressure proximal to the bleeding point while suture ligature is prepared

Digital compression proximal to the bleeding vessel controls hemorrhage and allows time to prepare definitive hemostatic measures.

Which physiologic principle explains why a tourniquet applied to a limb causes metabolic acidosis upon release?

Answer: Ischemic tissue accumulates lactic acid which washes into circulation on deflation

Anaerobic metabolism in the ischemic limb produces lactic acid, which rapidly enters systemic circulation when the tourniquet is deflated, causing transient metabolic acidosis.

In a Whipple procedure (pancreaticoduodenectomy), which anastomosis is typically performed first?

Answer: Pancreaticojejunostomy

The pancreaticojejunostomy is technically the most challenging and is typically constructed first when the field is least fatigued.

Which volatile anesthetic agent is CONTRAINDICATED in patients with a known or suspected susceptibility to malignant hyperthermia?

Answer: Sevoflurane

Sevoflurane (and all halogenated volatile agents) can trigger malignant hyperthermia in susceptible patients and must be avoided.

A wrapped set of heavy orthopedic instruments needs to be sterilized for a case later in the day. Which of the following represents the minimum exposure time and temperature for a gravity displacement steam sterilization cycle?

Answer: 30 minutes at 250°F (121°C)

For wrapped instruments in a gravity displacement sterilizer, the steam must adequately penetrate the packaging and the dense instrument load. The recognized minimum exposure time to achieve sterilization under these conditions is 30 minutes at 121°C (250°F).

A patient develops sudden dyspnea, hypotension, and jugular venous distension after a central line placement. What is the most likely emergency?

Answer: Tension pneumothorax

Tension pneumothorax after central line insertion presents with dyspnea, hypotension, JVD, and absent breath sounds on the affected side, requiring immediate needle decompression.

What is the primary purpose of surgical draping?

Answer: To create and maintain a sterile field around the operative site

Surgical draping establishes and maintains a sterile field by covering all areas except the operative site, directly reducing the risk of surgical site infection.