What is a Varus Stress Test?
The Varus Stress Test is a crucial component of orthopedic examinations used to evaluate the integrity of the lateral collateral ligament (LCL) in the knee and elbow. By applying a varus force to the joint, this test assesses ligament injuries, varus instability, and lateral joint line gapping, which are often associated with conditions like knee instability, excessive gapping, or a complete posterolateral corner injury. It is particularly useful in cases involving sports medicine, physical examinations, and preoperative evaluations.
Performed with the patient's knee, either flexed or extended, the test may help detect damage to structures such as the fibular collateral ligament, popliteus tendon, and popliteofibular ligament. Varus gapping and lateral compartment gapping are key indicators of injury, often accompanied by instability or pain on the lateral side of the knee. For elbow assessments, it helps assess the integrity of the lateral collateral ligament of the elbow. This test is commonly used to diagnose ligament injuries, such as sprains or tears, which can result from trauma or repetitive stress. By applying a varus force to the elbow while it's slightly flexed, the test evaluates the stability of the joint.
The Varus Stress Test is frequently used alongside the Valgus Stress Test to provide a comprehensive evaluation of lateral and medial collateral ligament structures. Stress radiographs or arthroscopy may complement the physical examination for increased diagnostic accuracy.










