Patella Apprehension Test for cruciate injury of the knee

Perth Chiropractor Dr. Sarah Pye demonstrates how to perform Patella Apprhension Stress Test. The Acute Patella Injury Test (aka Apprehension Test) is used to assess the possibility that the patient may have sustained a patellar dislocation which spontaneously reduced. This test provokes the same sensations which would have been present when the dislocation occured and therefore will elicit a reactive contraction of the quadriceps muscles by the patient in an attempt to avoid a recurrance of the dislocation. This reaction is referred to as an apprehension sign. The patient lies supine on the table with the knee in 20-30 degrees of flexion and the quadriceps relaxed. The examiner carefully glides the patella laterally observing for the apprehension sign. A positive test is the presence of this reaction by the patient.




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