Thomas’s Test (for fixed flexion deformity)

With the patient lying supine on a firm surface:

1. Place your left hand under the patient’s lumbar spine
2. Passively flex both hips and knees as far as possible (the normal lumbar lordosis should disappear).
3. Keeping the non-test hip flexed, ask the patient to extend the test leg.
   1. The lumber lordosis should remain absent
   2. An inability to fully extend the test leg indicates a fixed flexion deformity of the hip on that side.

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