Question

How to find true leg length discrepancy?

a) Measure from ASIS to medial malleolus
b) Assess heel height in standing position
c) Perform a visual inspection of leg length
d) Palpate for bony landmarks in supine position

Answer 1

True leg length discrepancy is most accurately measured from the anterior superior iliac spine (ASIS) to the medial malleolus and by palpating for bony landmarks in the supine position.

Step-by-step explanation:

To find true leg length discrepancy (LLD), one commonly used and reliable method is to measure the distance from the anterior superior iliac spine (ASIS) to the medial malleolus. This is done while the patient is in a supine position to ensure an accurate measurement. The process involves:

1. Having the patient lie flat on their back on an examination table.
2. Identifying and palpating the ASIS and medial malleolus bony landmarks.
3. Using a tape measure to measure the distance between these two points.
4. Comparing the measurements of both legs to determine if there is a discrepancy.

Visual inspection of leg length and assessing heel height in the standing position provide more general information, which can lead to false estimation due to postural issues or differences in muscle mass. Palpation in supine position helps in identifying the ASIS for accurate measurement.