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Knee Stability Tests: How Doctors Check Your Knee's Strength
Published: Oct 11, 2023
Knee stability tests are crucial for diagnosing ligament injuries. These hands-on exams help doctors determine if your knee is functioning properly.
The Valgus and Varus Stress Tests
These tests check the medial and lateral collateral ligaments. The doctor applies gentle pressure to the side of your knee while supporting it. Any excessive movement or pain could indicate a ligament injury. These tests are usually done with the knee straight and slightly bent.
Anterior and Posterior Drawer Tests
These tests assess the anterior and posterior cruciate ligaments. The doctor moves your shin bone forward and backward while your knee is bent. Abnormal movement may suggest a ligament tear. The Lachman test is a variation that's often more accurate for anterior cruciate ligament injuries.
The Pivot Shift Test
This test checks for rotational stability of the knee. It's particularly useful for diagnosing anterior cruciate ligament injuries. The doctor manipulates your leg in a specific way to recreate a 'giving way' sensation. A positive test may indicate ligament damage.
Frequently Asked Questions
They may cause mild discomfort but shouldn't be very painful.
They're helpful but not 100% accurate; imaging may be needed for confirmation.
Your doctor will likely recommend further tests or treatment options.
It's best to have a trained professional perform these tests.
Usually just a few minutes each as part of a complete knee exam.
Wrapping Up
Knee stability tests are valuable tools that help doctors assess ligament injuries and guide treatment decisions.
References
- Malanga GA, et al. Physical examination of the knee: a review of the original test description and scientific validity of common orthopedic tests. Arch Phys Med Rehabil 2003; 84:592.
- Solomon DH, et al. The rational clinical examination. Does this patient have a torn meniscus or ligament of the knee? Value of the physical examination. JAMA 2001; 286:1610.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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