Review Question - QID 1146

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Meniscal Tears Treatment Operative QID: 1146 (OBQ05.260)

QID 1146 (Type "1146" in App Search)

Tears in the peripheral one-third of the meniscus have higher healing rates following meniscal repair than those in a more central location. This clinical observation is explained by which of the following anatomic factors?

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Increased blood supply

98%

1652/1693

Increased elesticity

5/1693

Increased type II collagen

7/1693

Increased type I collagen

7/1693

Increased glycosaminoglycan content

6/1693

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The meniscus recieves its blood supply from the geniculate vessels at its capsular attachment. The peripheral third of the meniscus is the most vascular part, and is known as the red-red zone. This has the best potential for healing following repair. The middle third (red-white zone) and the inner third (white-white zone) have lower healing rates. The distribution of collagen and GAGs is similar and has not been shown to affect healing. The paper by Henning describes improved healing rates of meniscal tears with up to 5mm of rim width by rasping the synovium. The Turman paper is a review which covers the fact that there is both a decreased vascularity and healing rate for repairs of tears with larger rim widths.