What condition does the Thomas test help evaluate?

The Thomas test is specifically designed to evaluate for a flexion contracture of the iliopsoas muscle. During this test, a patient lies supine on an examination table and brings one knee towards their chest while the other leg remains extended on the table. If the extended leg does not stay flat on the table and instead lifts off, this indicates tightness or contracture of the iliopsoas muscle.

In assessing hip flexor tightness, the Thomas test provides valuable information about the range of motion and function of the hip joint. If the iliopsoas is tight, it can lead to an inability to fully extend the hip, making this test a crucial part of a physical examination when evaluating conditions that may be related to hip flexor tightness or dysfunction.

The relationship between the iliopsoas and hip mobility highlights why this test is particularly relevant for diagnosing conditions associated with flexion contractures, distinguishing it from the other potential conditions listed.