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Video 1. Arthroscopic medial release for medial abrasion phenomenon. An example of stage III medial compartment osteoarthritic knee with medial abrasion phenomenon treated by arthroscopic medial release is shown in this video clip. This is a 78 years old female suffering from left knee pain for more than 10 years. The arthroscopic examination revealed tightness of the medial facet of the patellofemoral joint and obliteration of the inferomedial region of the patella by hypertrophied medial plica and synovitis tissue. The abrasion phenomenon between fibrotic medial plica and medial femoal condyle could be reproduced by manipulation. After arthroscopic medial release, the medial gutter and the damaged medial femoral condyle could be clearly visualized and the medial abrasion phenomenon was also eliminated.

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Lyu et al. BMC Musculoskeletal Disorders 2012 13:226   doi:10.1186/1471-2474-13-226