Knee Stability Tests: How Doctors Check Your Knee's Strength

What's This About?

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.
Knee stability tests are diagnostic methods used to evaluate the integrity of knee ligaments, including medial, lateral, anterior, and posterior ligaments.
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.
TL;DR · FAQs
  • Q: Do these tests hurt?
    A: They may cause mild discomfort but shouldn't be very painful.
  • Q: Are these tests always accurate?
    A: They're helpful but not 100% accurate; imaging may be needed for confirmation.
  • Q: What happens if a test is positive?
    A: Your doctor will likely recommend further tests or treatment options.
  • Q: Can I do these tests on myself?
    A: It's best to have a trained professional perform these tests.
  • Q: How long do these tests take?
    A: 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.
Concerned about your knee's stability? Consult with Doctronic to learn more about these tests and whether you might need them.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic.
Additional References
  1. 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.
  2. 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.