some trick questions

1. false positive trandelenberg test--- costopelvic impingement
2. false negative tdbg test ---- suprapelvic muscle acting , patient tilting on one side
3.prerequisite---1.pat should be able to stand on affected side
2.there should not be any abduction or adduction deformity
3.pelvis should be free to move
4.able to flex both side up to 30 dig.
4.causes of tdb positive-- weakness in abductor --pollio
n/u tcnf #
hip dislocation, DDH, PERTHES, COXA VARA