Leg Length Measurement

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Patient supine with legs extended and arms relaxed. Legs should be in the same degree of abduction/adduction and internal/external rotation for reliability.

For True Leg Length, the measurement is from the ASIS to the distal medial malleolus on the same side. A difference of 1.0-1.5 cm is considered normal, but can still be a cause of symptoms.

For Apparent Leg Length, the measurement is from the umbilicus to the medial malleolus on both sides. This test is performed after true leg length discrepancy is ruled out. Apparent leg length discrepancy may be due to a flexion or adduction deformity of the
hip joint, or a tilting of the pelvis.

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How does this rule out pelvic tilt issues? My orthopedic surgeon recommends doing segmented measurements for that--Measuring the femur/thigh then leg.

carolejackson