Trendelenburg Sign
Pronunciation: TREN-del-en-berg sign
A physical examination finding indicating hip abductor weakness, where the pelvis drops on the unaffected side during single-leg stance.
Full Definition
The Trendelenburg sign is a clinical test used to assess hip abductor muscle function, particularly the gluteus medius and minimus. Named after German surgeon Friedrich Trendelenburg, the test involves having the patient stand on one leg while the examiner observes pelvic alignment. A positive sign occurs when the pelvis drops on the side opposite to the standing leg, indicating weakness of the hip abductors on the stance side. This can result from various conditions including hip dysplasia, superior gluteal nerve injury, or hip abductor muscle weakness. The sign is distinguished from Trendelenburg gait, which is the compensatory walking pattern that develops.
Usage
Usage note: Named after Friedrich Trendelenburg; capitalize as eponym. Distinguish from Trendelenburg gait pattern.
In Context
- "Physical examination revealed a positive Trendelenburg sign on the right side." — Clinical assessment
- "The patient's Trendelenburg sign resolved following hip abductor strengthening." — Physical therapy progress note