Which step of the Cluster of Laslett involves lifting under the ischial tuberosity?

• A. Sacral Thrust
• B. Thigh Thrust
• C. Distraction
• D. Compression

Answer: (B)

The step of the Cluster of Laslett that involves lifting under the ischial tuberosity is known as the Thigh Thrust. This assessment technique is employed to examine for sacroiliac joint dysfunction. During this maneuver, the examiner places a hand under the ischial tuberosity while applying a posteriorly directed force on the thigh, essentially assessing the integrity of the sacroiliac joint and any associated pain that may indicate dysfunction.

Lifting under the ischial tuberosity directly targets the area where the pelvis and sacrum meet, making it a crucial step in evaluating lower back and pelvic pain. The presence of pain during this test can be indicative of issues such as sacroiliitis or dysfunction in the surrounding structures. This method stands out from the other options, which each focus on different testing positions or techniques that target various anatomical components or joint interactions.