Video – Thessaly Test (Merke’s Test)

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Thessaly Test (Merke’s Test)

The Thessaly’s test test is used to detect instability of the knee and meniscal tears. This test is also called Merke’s test, the disco test, Losee’s disco test, and the weight-bearing rotation meniscal test.

To perform this test, with the support of the examiner, the patient stands on the involved limb with the knee flexed to about 20 degrees. The patient is then asked to twist into internal and then external rotation a number of times.

A positive test is indicated by pain and apprehension, suggesting ligamentous instability while pain and clicking are suggestive of meniscal tears.

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