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Acute traumatic lateral patellar dislocation.

A M Carragher¹, A Todd, G Blake

¹Department of Surgery, Altnagelvin Area Hospital, Londonderry, Northern Ireland.

Annals of Emergency Medicine

|December 1, 1989

Summary

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An unusual patellar dislocation occurred laterally and rotated 90 degrees, becoming wedged. Standard closed reduction failed, necessitating surgical intervention for this acute extra-articular knee injury.

Area of Science:

Orthopedics
Traumatology
Sports Medicine

Background:

Patellar dislocations are common knee injuries.
Extra-articular dislocations are rare, especially with significant rotation.

Observation:

A patient presented with an acute lateral patellar dislocation.
The patella was rotated 90 degrees on its vertical axis.
The dislocated patella was wedged against the lateral femoral condyle.

Findings:

Closed reduction in the emergency department was unsuccessful.
Operative intervention was required for successful patellar realignment.

Implications:

This case highlights a rare variant of patellar dislocation.

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It underscores the need for prompt surgical evaluation in complex cases.

Understanding such mechanisms aids in orthopedic trauma management.