CSFA Procedures Practice Questions (560 Flashcards)

The membranous urethra is the most vulnerable segment. It is the shortest (approx. 1-2 cm) and least dilatable portion, passing through the urogenital diaphragm (external sphincter). Because it is fixed, whereas the bulbar and pendulous urethra are mobile, aggressive catheter advancement against resistance here often leads to urethral rupture or false passages. CSFA Exam Tip: The NBSTSA often tests the four segments: preprostatic, prostatic, membranous, and spongy (bulbar/pendulous). Distractors often include the prostatic urethra, which is wider and more distensible.

The CSFA must use two pairs of Adson tissue forceps with teeth to evert the skin edges (forming a chimney or tent shape) before the staple is fired. \n\nRationale: Inversion of skin edges leads to delayed healing and increased scarring because the epidermal layers are not in direct contact. Proper eversion allows for edge-to-edge healing. \n\nExam Tip: NBSTSA frequently asks about the assistant's role in stapling; the primary role is tissue eversion and maintaining alignment while the surgeon or assistant fires the stapler.

Between the subcutaneous fat (superficial fascia) and the breast parenchyma (deep fascia/pectoralis fascia).\n\n**Technical Details:** The flaps should be approximately 5mm to 1cm thick, depending on the patient's body habitus. If the plane is too superficial, skin necrosis may occur due to disruption of the subdermal vascular plexus. If too deep, breast tissue is left behind, increasing recurrence risk.\n\n**Exam Tip:** Skin-sparing techniques require meticulous dissection to preserve the subdermal plexus while removing all glandular tissue.

The tubular system utilizes a muscle-splitting (muscle-dilating) technique rather than muscle stripping. This preserves the attachment of the multifidus muscle to the spinous processes, reducing postoperative dead space, decreasing ischemic necrosis, and minimizing post-laminectomy pain syndrome. \n\n**Exam Focus:** NBSTSA emphasizes the minimally invasive trend. Focus on the preservation of the posterior tension band and reduced blood loss as key benefits.

Trash foot refers to distal digital ischemia caused by micro-embolization of plaque or thrombus dislodged during clamp manipulation or anastomosis. Rationale: Atherosclerotic debris from the proximal femoral artery travels distally upon reperfusion. Prevention: The surgeon should flush the graft and the native vessels (proximal, then distal) before completing the final sutures. CSFA Role: Assist in the flushing maneuver by holding the suction and ensuring the basin is ready to catch the blood and debris.