Podcast
Questions and Answers
What is the main cause of injury to ligamentous supports of triquetrolunate and midcarpal joints?
What is the main cause of injury to ligamentous supports of triquetrolunate and midcarpal joints?
Which side of the wrist does triquetrolunate instability commonly cause pain on?
Which side of the wrist does triquetrolunate instability commonly cause pain on?
What type of examination is usually diagnostic for triquetrolunate injuries?
What type of examination is usually diagnostic for triquetrolunate injuries?
What type of instability is manifested by the laxity of the ulnar arm of the arcuate ligament?
What type of instability is manifested by the laxity of the ulnar arm of the arcuate ligament?
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What is the common radiographic finding in patients with midcarpal instability?
What is the common radiographic finding in patients with midcarpal instability?
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Study Notes
- Axial loading of a hyperextended pronated wrist causes injury to ligamentous supports of triquetrolunate and midcarpal joints.
- Disruption of ligaments leads to laxity on ulnar side of wrist.
- Patients with triquetrolunate instability report pain on ulnar aspect of wrist, with or without wrist click in radial and ulnar deviation.
- Physical examination reveals tenderness over ulnar aspect of wrist in region of triquetrolunate joint.
- Ballottement of lunotriquetral joint helps diagnose instability.
- Arthroscopic examination is usually diagnostic for triquetrolunate injuries.
- Palmar instability in midcarpal region is a manifestation of laxity of ulnar arm of arcuate ligament.
- Defects in dorsal intercarpal and radiotriquetral ligaments may contribute to static malpositioning.
- Patients with midcarpal instability have a painful "clunk" with ulnar deviation and pronation of wrist.
- Radiographic examination usually reveals volar intercalated segmental instability.
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Description
Test your knowledge on wrist instability with this informative quiz! Learn about the different types of ligament injuries that can cause wrist instability, their symptoms, and how they are diagnosed. Keywords include axial loading, triquetrolunate instability, midcarpal instability, and radiographic examination. Challenge yourself and see how much you know about this common condition.
