Which of the following tests focuses on functional stability of the sacroiliac joint?

• A. Mennell Test
• B. Gaenslen's Test
• C. Single Leg Stand Test
• D. Patrick Test

Answer: (B)

Gaenslen's Test is specifically designed to assess the functional stability of the sacroiliac joint. This test involves having the patient lie supine and performing a combination of hip flexion and extension on opposite legs. This movement creates stress on the sacroiliac joint, allowing the examiner to evaluate the integrity and stability of the joint through the elicitation of pain or discomfort, which may indicate possible dysfunction or instability.

Other tests listed may evaluate other aspects of the lower extremity or joint function but do not specifically target the sacroiliac joint in terms of functional stability. For instance, the Mennell Test is used to assess for sacroiliac joint dysfunction but focuses more on movement assessments rather than functional stability under load. The Single Leg Stand Test assesses balance and stability in general rather than targeting the sacroiliac joint directly. Similarly, the Patrick Test evaluates hip joint function and mobility, not directly assessing the stability of the sacroiliac joint.