Low-grade partial meniscectomy
For a low-grade partial meniscectomy, where less than 25% of the meniscus is removed, the postoperative evaluation uses the same criteria as the preoperative assessment, achieving up to 90% accuracy.
To identify a tear in both preoperative and postoperative scenarios, the criteria include:
- A linear intrasubstance signal increase that reaches the articular surface visible on two images. These images can be consecutive in the same orientation or in the same area but on two different planes.
- A displaced meniscal fragment, assuming images are taken at 3mm intervals.
A tear is considered possible if there's a definitive signal surfacing or distortion on only one image.
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