A 25/M suffers from disease process involving right hip causing hip instability. He is asked to bear weight on left lower limb since this hip is normal his muscles/joint on left side (G. medius and minimum) can prevent drop of hemipelvis on right side but when he bears weight on right side his muscles/joint are affected and cannot prevent drop of hemipelvis on left side so for normal trendelenburg test – femoral head/neck / joint/G. medius/minimum (supplied by superior gluteal nerve) should be intact. Trendelenburg test is positive in a/e:
- Dislocation hip
- Non union neck femur
- Superior gluteal nerve palsy
- T.B hip
T.B hip Trendelenburg is usually negative except stage 4 and 5 ,all other conditions here trendelenburg test is positive.