The 'Delhi active test' for detection of anterior cruciate ligament tears.

All the described tests for the detection of anterior cruciate ligament (ACL) tear are passive tests. For obese or muscular built patients these tests are cumbersome and often unsuitable. We describe for the first time a new method, the 'Delhi active test', by which a torn ACL can be detected irrespective of the size or build of the patient. The results of this test are reproducible and the diagnostic accuracy is comparable with other tests. We suggest that the 'Delhi active test' be used as one of the routine clinical methods to detect the torn ACL.