CSFA Basics Flashcards: 70 Practice Questions & Answers

The standard sequence is: 1. Four towels (secured with towel clips or adhesive), 2. Bottom (foot) sheet, 3. Top (head) sheet, 4. Fenestrated laparotomy sheet. Rationale: Draping proceeds from the operative site to the periphery. The CSFA must ensure the fenestration is centered over the intended incision. Clinical Pearl: Always cuff the hands within the drape to prevent contamination and avoid reaching over a non-sterile area. CSFA Strategy: NBSTSA often tests the specific order of application; remember Site to Periphery.

Braided sutures like Vicryl offer superior knot security and handling (less memory). However, the interstices between fibers can harbor bacteria (capillarity), making them less ideal for contaminated wounds compared to monofilaments like PDS or Monocryl. Vicryl is typically coated (calcium stearate/lactide) to reduce tissue drag. NBSTSA Focus: Differentiating Vicryl (braided) from Monocryl (monofilament) in terms of wicking potential in infected fields.

In the USP system, as the number of zeros increases, the diameter of the suture decreases (e.g., 2-0 is smaller than 0; 4-0 is smaller than 2-0). Tensile strength is defined as the maximum amount of weight/force the suture strand can withstand before breaking. NBSTSA Exam Tip: The CSFA's goal is to use the smallest diameter suture that will adequately support the tissue until wound healing provides sufficient strength, thereby minimizing foreign body reaction.

Robotic arms must be draped using specific sterile barriers. The CSFA must ensure that the non-sterile robotic arm does not touch the sterile drape's exterior during docking. If a breach occurs, the drape must be replaced. Clinical Pearl: CSFAs are often responsible for docking. The most common contamination point is the camera port or the instrument drive interface. 2026 guidelines emphasize visual verification by the assistant during the entire docking phase.

The pack must be considered contaminated and returned for reprocessing. The primary concern is wicking, where moisture acts as a pathway for microorganisms to migrate from the outside of the package to the sterile instruments. Causes include improper loading (e.g., stacking trays), clogged chamber drains, or incorrect cooling.