Internal Rotation Resistance Stress Test
- Internal Rotation Resistance Stress Test is used to Differentiate between internal and classic outlet impingement
- The test is performed with the patient seated and the examiner standing behind the patient.
- The patient’s arm is positioned in 90 degrees of abduction in the coronal plane and approximately 80 degrees of external rotation.
- A manual isometric muscle test is performed for external rotation and compared with one for internal rotation in the same position.
- If a patient with a positive impingement sign has good strength in external rotation and weakness in internal rotation, the test is positive.
- A positive internal rotation resistance stress test suggests internal impingement,
- and a negative test (more weakness in external rotation) suggests classic outlet impingement.
- Sensitivity: 88 %
- Specificity: 96 %
- Campbel's Operative Orthopaedics 13th Book
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