Why is the scaphoid susceptible to avascular necrosis?

Why is the scaphoid susceptible to avascular necrosis?

Avascular necrosis (AVN) is one complication of scaphoid fracture. Since the scaphoid receives its arterial supply in a retrograde fashion (i.e. from distal to proximal pole), the part proximal to the fracture is usually affected.

What number points out the scaphoid bone?

The scaphoid bone is one of the carpal bones of the wrist. It is situated between the hand and forearm on the thumb side of the wrist (also called the lateral or radial side). It forms the radial border of the carpal tunnel….

Scaphoid bone
Latin os scaphoideum, os naviculare manus
MeSH D021361
TA98 A02.4.08.003
TA2 1250

Which location of the scaphoid is most prone to injury?

About 80 percent of scaphoid fractures happen at the waist, 20 percent at the proximal pole, and 10 percent at the distal pole. The site of the fracture affects how it will heal. Fractures in the distal pole and waist usually heal quickly because they have a good blood supply.

How do you test for scaphoid FX?

There are several different diagnostic modalities to detect a scaphoid fracture. These include conventional radiographs, computed tomography (CT scans), magnetic resonance examination, bone scintigraphy and sonograms.

How do I strengthen my scaphoid bone?

Stretching exercises

  1. Flexion: Gently bend your wrist forward. Hold for 5 seconds. Do 2 sets of 15.
  2. Extension: Gently bend your wrist backward. Hold this position 5 seconds. Do 2 sets of 15.
  3. Side to side: Gently move your wrist from side to side (a handshake motion). Hold for 5 seconds in each direction. Do 2 sets of 15.

What is avascular necrosis of the scaphoid called?

Preiser’s Disease is a condition caused by avascular necrosis of the scaphoid which can lead to progressive radial-sided wrist pain.

What is the bone that sticks out on the wrist?

The pisiform bone (/ˈpaɪsɪfɔːrm/ or /ˈpɪzɪfɔːrm/), also spelled pisiforme (from the Latin pisifomis, pea-shaped), is a small knobbly, sesamoid bone that is found in the wrist.

What does a positive Watson test mean?

Uses. Watson’s test is used by physicians to diagnose scapholunate instability. This test has a low specificity and sometimes is positive for capito-lunate instability. As many as 20% of normal wrists will also have a ‘clunk’.

Do you need to Immobilise thumb for scaphoid fracture?

Numerous studies to date have demonstrated that immobilizing the wrist is necessary to facilitate scaphoid fracture healing [2, 4, 6, 11, 12, 16]. Our results concur, noting a significant increase in fracture stability when immobilizing the wrist.

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