Prone Instability Test for Hip Microinstability Hip microinstability is a relatively new clinical entity of hip pathology in the young patient. Normal hip stability, as with other joints such as the shoulder, depends on the relationship between bony structures, muscles and ligaments. In the hip joint that would be the acetabulum, its’ labrum, the ligamentum teres, the capsuloligamentous complex and various muscles around the joint. While a direct cause for hip microinstability may not always be

PRONE PUSH-UP TEST FOR POSTEROLATERAL ROTATORY INSTABILITY (PLRI) OF THE ELBOW Regan et al. in the year 2006 did a diagnostic study on the prone push-up test and found a sensitivity of 87,5% with an unknown specificity. For this reason we give this test a questionable clinical value in practice. The push-up test makes use of the patient’s body weight to create an axial load, valgus torque at the elbow resulting in posterolateral subluxation of the elbow. Watch the video to learn how it's done! |

PRONE INSTABILITY TEST (PIT) FOR RADIOLOGICAL LUMBAR "INSTABILITY": Fritz et al. (2005) have evaluated the PIT regarding its validity and reliability in comparison with the "gold standard" of radiological lumbar "instability" and found a good reliability of 0.69 (kappa), but a low sensitivity of 61% and a low specificity of 57% (calculated). Be aware thought that radiological findings often don't correlate well with clinical findings. So while this test is not validated for radiological lumbar "