20260324 Microvascular Surgery Dr Charlene

Which of the following flaps has a defined vascular pedicle?

• A. Random pattern flap

• B. Axial pattern flap

• C. Split-thickness graft

• D. Composite graft

During free flap monitoring, a flap becomes congested, tense, and dark within 12 hours post-op. Capillary refill is brisk. What is the most likely underlying issue?

• A. Arterial insufficiency

• B. Venous thrombosis

• C. Vasospasm

• D. Fat necrosis

What is the most common cause of skin graft failure?

• A. Infection

• B. Haematoma

• C. Early motion

• D. Poor vascularity

28-year-old man presents with a traumatic amputation of the thumb tip with exposed distal phalanx. The defect is volar, and preservation of sensation is critical. Which of the following is the most appropriate reconstructive option?

• A. Thenar flap

• B. Cross-finger flap

• C. V-Y advancement flap (Atasoy)

• D. Moberg volar advancement flap

Increasing the angle of a Z-plasty beyond 60° will:

• A. Decrease length gain and increase tension

• B. Increase length gain but risk vascular compromise

• C. Have no effect on flap viability

• D. Reduce risk of tip necrosis