In scaphoid fractures, which location has the highest risk of avascular necrosis?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the APEA Management Orthopedics Test using flashcards and multiple choice questions, complete with hints and explanations for effective learning. Gear up for your test now!

Multiple Choice

In scaphoid fractures, which location has the highest risk of avascular necrosis?

Explanation:
Understanding where the blood supply to the scaphoid travels helps explain AVN risk. The scaphoid’s arteries enter mainly at the distal pole and run retrogradely toward the proximal pole. If a fracture is at the proximal pole, these vessels are easily disrupted to the fragment, cutting off its blood supply and making avascular necrosis more likely. Fractures at the distal pole or in the waist are less likely to sever the critical retrograde flow to the proximal fragment, so AVN risk is lower. Non-displaced fractures keep alignment and blood flow intact, further reducing AVN risk.

Understanding where the blood supply to the scaphoid travels helps explain AVN risk. The scaphoid’s arteries enter mainly at the distal pole and run retrogradely toward the proximal pole. If a fracture is at the proximal pole, these vessels are easily disrupted to the fragment, cutting off its blood supply and making avascular necrosis more likely. Fractures at the distal pole or in the waist are less likely to sever the critical retrograde flow to the proximal fragment, so AVN risk is lower. Non-displaced fractures keep alignment and blood flow intact, further reducing AVN risk.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy