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ABFAS Practice exam 2025 Questions and Answers A 45-year-old male sustained a crush-type injury with early soft tissue necrosis to the left foot. Radiographs are negative for fracture or dislocation. Which of the following tests would be most helpful for determining skin-flap viability? fluorescein dye study. distal plethysmography. segmental pressure gradients. indium scan. - ....ANSWER ...-Rationale: Fluorescein dye studies might not be routinely ordered, but of the available answer choices, this would provide the best information on soft tissue viability following a crush injury. Digital plethysmography and segmental pressure gradient would provide information about macrovascular perfusion, but not microvascular skin-flap tissue viability. An indium scan is non-specific for skin-flap viability. A patient presents eight weeks after sustaining a fracture through the talar neck. Which finding is a prognostic indicator that the vascular supply is intact? resorption of subchondral bone of the talar dome. increased trabecular pattern across the fracture. increased sclerosis of the talar body. …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1