Canis ISSN: 2398-2942

Carpus: collateral ligament rupture

Contributor(s): Prof Walter Renberg

Introduction

  • Rare (ulnar collateral ligament).
  • Rupture of radial collateral ligament causes medial instability of antebrachiocarpal joint - radius may be rotated externally and antebrachiocarpal joint space opened medially.
  • Cause: trauma.
  • Signs: acute onset forelimb lameness.
  • Diagnosis: signs, stress radiographs.
  • Treatment: surgical repair
  • Prognosis: always some loss of carpal flexion.

Pathogenesis

Etiology

  • Trauma (jumps, falls, vehicular trauma).

Pathophysiology

  • Carpus is hyperextended 10° and has up to 15° of valgus deviation during weight-bearing - together with cranial angulation of distal radius leads to increased tension on radial collateral ligament and predisposes it to injury.

Timecourse

  • Acute (within hours).

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers


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