The valgus stress test (photo A) is used to assess the integrity of the medial collateral ligament, while the varus stress test (photo B) is used to assess the lateral collateral ligament.
What does valgus and varus test?
Valgus and varus tests: checks the lateral and medial collateral ligaments (ligaments on either side of the knee joint that help in back and forth movement of knee). In this test, your doctor holds your knee joint with one hand and the ankle joint with the other, and moves your leg sideways.
What is the valgus maneuver?
It involves placing the leg into extension, with one hand placed as a pivot on the knee. With the other hand placed upon the foot applying an abducting force, an attempt is then made to force the leg at the knee into valgus.
What does a positive varus test mean?
If the varus stress test is positive at 20°, but negative at 0°, only the LCL is torn. A positive result at both 0° and 20° indicate cruciate ligament involvement.
What is a positive valgus stress test knee?
The test is then repeated with 30 degrees of knee flexion. The Valgus Stress test is positive if abduction and gapping is greater than the uninvolved side, with or without pain. Also, observe for an indentation of the skin over the medial joint line called the ‘suction sign’.
What is the difference between varus and valgus?
Whenever the distal part is more lateral, it is called valgus. Whenever the distal part is more medial, it is called varus. Therefore, when the apex of a joint points medially, the deformity, if any, would be called valgus, as the distal part points laterally.
What is varus and valgus at the knee?
In a varus (bow-leg) knee, this line passes medial to the center of the knee, increasing force across the medial tibiofemoral compartment. In a valgus (knock-knee) knee, the axis passes lateral to knee center, increasing force across the lateral compartment.
What is Lachman knee test?
The Lachman test is a specific clinical exam technique used to evaluate patients with a suspected anterior cruciate ligament (ACL) injury. The test relies on proper positioning and technique and is regarded as the most sensitive and specific test for diagnosing acute ACL injuries.
What is the McMurray test used for?
The eponymous test that is commonly performed as part of the routine knee examination in order to test for the presence of a meniscus tear is McMurray’s test, which was described by McMurray in 1942 in the British Journal of Surgery (5).
How do you perform a McMurray test?
McMurray’s test is performed with the patient supine and relaxed. The examiner grasps the patient’s heel with one hand and the joint line of the knee with the other hand. The knee is flexed maximally, with external tibial rotation (medial meniscus) or internal tibial rotation (lateral meniscus).
What is a valgus stress test of the elbow?
To perform the moving valgus stress test, the examiner applies and maintains a constant moderate valgus torque to the fully flexed elbow and then quickly extends the elbow. The test is positive if the medial elbow pain is reproduced at the medial collateral ligament and is at maximum between 120 degrees and 70 degrees.
What is ACL test?
The Anterior Drawer Test for anterior cruciate ligament (ACL) stability is a special test for your knee. It is designed to help you or your healthcare provider determine if you have sprained or torn your ACL. (A sprain is a tear to a ligament. The terms “ligament tear” and “sprain” are used interchangeably.)
What causes valgus deformity?
Osteoarthritis is the most common cause, however, other causes include post-traumatic arthritis, rheumatoid arthritis, rickets, and renal osteodystrophy. Regardless of etiology, the valgus malalignment can be corrected with careful analysis of the deformity and a systematic surgical approach.
