Objective: To retrospective study the results of arthroscopic resection of articular capsule valvular treated popliteal cysts and examined the incidence of complication.
Methods: From July 2007 to July 2010, 45 patients with symptomatic popliteal cysts such as knee pain and limitation of motion were treated with arthroscopic technique to resect the connecting valvular mechanism at posteromedial compartment of articular capsule. Through the posteromedial viewing portal and cyst resection working portal, resected the valvular mechanism by shaver and plasma cutter, associated intra-articular pathology was treated simultaneously. The functional outcome was evaluated by employed Rauschning and Lindgren score before the surgery and the last follow-up. By using of Wilcoxon rank sum test to statistics analyze the clinic outcome.
Result: In all cases, 40 patients were found the associated intra-articular pathology, the incidence was 88.9%.The intra-articular pathology was medial meniscus tear (27 cases, 60.0%), lateral meniscus tear (20 cases, 44.4%), cartilage lesion (28 cases, 62.2%), which composed with patellofemoral joint (12 cases, 26.7%),medial condyles of femur (10 cases, 22.2%),lateral condyles of femur (6 cases, 13.3%). The anterior cruciate ligment injury was found in 2 cases, the incidence was 4.4%. All the patients achieved symptoms relief postoperative, such as posterior knee discomfort and swelling after activities.The Rauschning and Lindgren score was improved 1-2 grade in average (Z = -6.092, P = 0.00). The recurrence rate was 2.2%. All the incision healed good. No major complications were encountered such as saphenous nerve, great saphenous vein, blood vessel in popliteal injury.
Conclusions: Arthroscopic resection of articular capsule valvular treatment of popliteal cyst and treatment of associated intra-articular pathology are effective and safe. This surgery technique has more minimally trauma and lower recurrence rate.The clinic results in short term are excellent.
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