Poster 265: The Risk of Iatrogenic Posterior Neurovascular Injury in Lateral Meniscal Repair Based on Real Arthroscopic Position: An MRI Study

Objectives: Posterior horn of lateral meniscal repair using an all-inside device involves a risk iatrogenic posterior neurovascular injury. Some studies have evaluating the injury in this area but most were based on preoperative MRIs and landmarks which are difficult to clearly see under actual arthroscopic surgery. To our knowledge, there been no date with knee standard operational figure-of-4 position joint dilatation related border root is easy identify during The objective study was evaluate compare establish safe danger zones repairing meniscus through anterolateral anteromedial portals relation medial borders (LMR) MRIs. Methods: This descriptive laboratory study. Using 29 axial magnetic resonance imaging (MRI) knees fluid at level meniscus, direct lines drawn simulate straight deployed from LMR extending 14 mm beyond capsule. If line passed or touched structure, noted, measurements made determine LMR. Results: Repairing portal had significantly greater than portal, incidences 68.97% 10.35%, respectively (p-value = 0.001). “safe zones” 4.15 ± 1.87 6.57 0.98 LMR, respectively. Conclusions: Our found when tissue both repairs having portal. reduce risk, surgeon can use as described decrease potential repair. Clinical Relevance: Iatrogenic always concern any surgery, results be guide reducing