CSFA Surgical Anatomy and Physiology 2

Question 1

Which layer of the abdominal wall is avascular and serves as a surgical landmark during laparotomy closures?

Accepted Answer

Scarpa's fascia

Answer

Scarpa's fascia is the deep membranous layer of the superficial fascia that is relatively avascular and is often reapproximated during closure.

Question 2

During a right hemicolectomy, which structure is at greatest risk of injury at the hepatic flexure?

Accepted Answer

Duodenum

Answer

The duodenum lies in close proximity to the hepatic flexure and is at risk during mobilization of the right colon.

Question 3

The ansa cervicalis nerve supplies which group of muscles relevant to anterior neck dissection?

Accepted Answer

Infrahyoid strap muscles

Answer

The ansa cervicalis (C1–C3) innervates the infrahyoid strap muscles including the sternohyoid, sternothyroid, and omohyoid.

Question 4

Which physiologic mechanism primarily maintains mean arterial pressure when a patient transitions from supine to upright positioning on the operating table?

Accepted Answer

Baroreceptor-mediated sympathetic vasoconstriction

Answer

Baroreceptors in the carotid sinus and aortic arch detect pressure drops and trigger sympathetic vasoconstriction to maintain MAP.

Question 5

The fascial compartment containing the carotid artery, internal jugular vein, and vagus nerve is called the:

Accepted Answer

Carotid sheath

Answer

The carotid sheath is a condensation of cervical fascia enclosing the carotid artery, internal jugular vein, and vagus nerve.

CSFA - Certified Surgical First Assistant Practice Test

CSFA - Certified Surgical First Assistant Practice Test

CSFA Surgical Anatomy and Physiology 2