This procedure implies that the surgeon looked into the knee via small incisions, using arthroscopic equipment, but did not actually perform a surgical procedure on the internal problem.
This was common in the early days of arthroscopy, and the surgeon generally went on to make a wide incision and fix the problem during 'open surgery'.
Relevant resources on this site:
This course gives one an overview of the anatomy of the knee as the surgeon sees it during arthroscopy. The reader will get an idea of how the surgeon's view inside the knee is dependent upon the positioning of the portals and instruments.
A surgical procedure when a plug (or several) of normal joint cartilage are cored out and used to replace damaged cartilage.
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