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Related Experiment Videos

Capitate-lunate instability: recognition by manipulation under fluoroscopy.

S J White, D S Louis, E M Braunstein

    AJR. American Journal of Roentgenology
    |August 1, 1984
    PubMed
    Summary

    Videotape fluoroscopy identified a new carpal instability pattern, capitate-lunate instability, in patients with wrist pain. This imaging technique proved superior to standard radiography and arthrography for diagnosis.

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    Area of Science:

    • Orthopedics
    • Radiology
    • Hand Surgery

    Background:

    • Carpal dissociation can cause midcarpal pain and clicking.
    • Conventional imaging methods may not reliably diagnose certain carpal instabilities.

    Purpose of the Study:

    • To describe a novel carpal dissociation pattern: capitate-lunate instability.
    • To evaluate the diagnostic utility of videotape fluoroscopy for this condition.

    Main Methods:

    • Eight patients with midcarpal pain underwent a specific maneuver under fluoroscopic control.
    • The maneuver involved applying pressure to the scaphoid tuberosity with wrist traction and flexion.
    • Videotape fluoroscopy was used to visualize dynamic carpal motion.

    Main Results:

    Related Experiment Videos

    • The described maneuver revealed dorsal subluxation of the proximal carpal row and capitate-lunate subluxation in all eight patients.
    • Plain radiography and arthrography were inconclusive in diagnosing this instability pattern.
    • Conservative management was successful for all eight cases.

    Conclusions:

    • Capitate-lunate instability is a previously undescribed carpal dissociation pattern.
    • Videotape fluoroscopy is the optimal radiologic method for diagnosing capitate-lunate instability.
    • Conservative treatment is effective for this condition.