Scaphoid Fracture is a topic covered in the 5-Minute Emergency Consult.

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Basics

Description

  • The scaphoid is the most commonly fractured carpal bone.
  • This bone is the stabilizer between the distal and proximal carpal rows.
  • Injury may result in arthritis, avascular necrosis, or malunion.
  • Classified as:
    • Proximal 3rd (10–20%)
    • Middle 3rd (the waist, 70–80%)
    • Distal 3rd (the tuberosity)
    • Tubercle fractures
  • Fractures are missed on initial radiographs 10–15% of the time, and delayed diagnosis greatly increases risk of complications.
  • The blood supply to the scaphoid enters distally
  • The more proximal the fracture, the higher the likelihood for avascular necrosis
  • As the wrist is forcibly hyperextended, the volar aspect of the scaphoid fails in tension and the dorsal aspect fails in compression resulting in a fracture.

Etiology

Generally results from a fall on an outstretched (dorsiflexed) hand (FOOSH injury).

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Citation

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TY - ELEC T1 - Scaphoid Fracture ID - 307521 Y1 - 2016 PB - 5-Minute Emergency Consult UR - https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307521/all/Scaphoid_Fracture ER -