I recently read about a Finish study published in the New England Journal of Medicine suggesting that one of the most common types of knee surgery (a meniscectomy) is worthless. The meniscus (see photo), by the way, is the cartilage of the knee located on either side of what is popularly known as the “knee cap” (patella). It acts as a shock absorber.
The removal of (either part of or the entire) meniscus, known as a “meniscectomy”, is a simple operation: Small incisions are made for inserting the arthroscope (a small surgical camera) inside the knee. A tool called a “shaver”, guided by the surgeon, then trims torn meniscus and smooths the edges.
In the study, 146 patients with torn menisci were divided into two groups, one to receive real meniscectomies, and the other to receive a “fake surgery”, in which blade-less shavers were rubbed against the outside of the knee cap to simulate the sensation of having an actual meniscectomy.