Arthroscopic closure release includes arthroscopic lateral patella retinaculum releasing (LPRR) either outside synovial membrane (OSM) or through synovial membrane (TSM). At present, there is no research to compare the clinical efficacy of the above two methods for the treatment of lateral patellar compression syndrome (LPCS). So, the goal of this study was to investigate the method and overcome of arthroscopic LPRR either OSM or TSM for the treatment of LPCS. From September 2014 to December 2017, 125 patients of LPCS underwent arthroscopic LPRR either OSM or TSM combined with joint debridement. In the OSM group, knee joint was cleaned first. The surface of lateral patella retinaculum (LPR) was created the chamber for arthroscopic operation to release LPR. Synovial membrane was retained. In the TSM group, knee joint was cleaned first. Then synovial membrane, joint capsule and LPR, and superficial fascia were gradually incised from the joint cavity to subcutaneous tissue. The synovial membrane was cut open. Before and after surgery, Lysholm score, patella medial shift, Kujala score, VAS score and surgical complications were collected for evaluating clinical overcomes. All patients were followed up for 1.5–5 years. All patients had significant reduction in knee pain and improved function after 1 month and 1 year. The Lysholm score, the distance of patella medial shift, Kujala score, and VAS score in the OSM group and the TSM group were significantly improved in the final follow-up compared with before surgery (All P < 0.001), but these observed targets before surgery and at the last follow-up were compared between the OSM group and the TSM group with no statistical differences. However, the number of occurrences of joint hematoma and adhesion was significantly higher in the TSM group than the OSM group (P = 0.024). Arthroscopic closing LPRR for the treatment of LPCS can effectively improve the function and symptoms of patellofemoral joint with the advantages of small trauma, rapid recovery and less complications. But, the number of occurrences of hemarthrosis and joint adhesion were significantly higher in the TSM group than in the OSM group. The trial registration number (IRCT): IRCT20200205046378N1 and date of registration: February 10, 2020 (retrospectively registered).

中文翻译：

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关节镜下外侧骨膜通过滑膜外侧/外侧滑膜释放治疗for骨外侧压迫综合征的疗效和经验

关节镜闭合释放包括在滑膜外（OSM）或通过滑膜（TSM）的关节镜外侧lateral骨视网膜释放（LPRR）。目前，尚无研究比较上述两种方法治疗lateral骨外侧压缩综合征（LPCS）的临床疗效。因此，本研究的目的是研究OSM或TSM关节镜下LPRR治疗LPCS的方法和克服方法。2014年9月至2017年12月，对125例LPCS进行OSM或TSM联合关节清创术的LPRR关节镜检查。在OSM组中，首先清洁膝关节。外侧of骨视网膜（LPR）的表面被创建用于关节镜手术室释放LPR。滑膜被保留。在TSM组中，首先清洁膝关节。然后将滑膜，关节囊和LPR以及浅筋膜从关节腔逐渐切入皮下组织。将滑膜切开。收集手术前后的Lysholm评分，骨内侧移位，Kujala评分，VAS评分和手术并发症，以评估临床克服情况。所有患者均接受了1.5-5年的随访。所有患者在1个月和1年后膝关节疼痛明显减轻，功能改善。与手术前相比，OSM组和TSM组的Lysholm评分，of骨内侧移位距离，Kujala评分和VAS评分在最终随访中均显着改善（所有P <0.001），但是在OSM组和TSM组之间比较了这些手术前和最后一次随访时观察到的目标，无统计学差异。然而，TSM组的关节血肿和粘连的发生次数显着高于OSM组（P = 0.024）。关节镜下LPRR治疗LPCS可有效改善of股关节的功能和症状，创伤小，恢复快，并发症少。但是，TSM组的血栓形成和关节粘连的发生率显着高于OSM组。试用注册号（IRCT）：IRCT20200205046378N1，注册日期：2020年2月10日（追溯注册）。TSM组关节血肿和粘连的发生率显着高于OSM组（P = 0.024）。关节镜下LPRR治疗LPCS可有效改善of股关节的功能和症状，创伤小，恢复快，并发症少。但是，TSM组的血栓形成和关节粘连的发生率显着高于OSM组。试用注册号（IRCT）：IRCT20200205046378N1，注册日期：2020年2月10日（追溯注册）。TSM组关节血肿和粘连的发生率显着高于OSM组（P = 0.024）。关节镜下LPRR治疗LPCS可有效改善of股关节的功能和症状，创伤小，恢复快，并发症少。但是，TSM组的血栓形成和关节粘连的发生率显着高于OSM组。试用注册号（IRCT）：IRCT20200205046378N1，注册日期：2020年2月10日（追溯注册）。TSM组的血栓形成和关节粘连的发生率显着高于OSM组。试用注册号（IRCT）：IRCT20200205046378N1，注册日期：2020年2月10日（追溯注册）。TSM组的血栓形成和关节粘连的发生率显着高于OSM组。试用注册号（IRCT）：IRCT20200205046378N1，注册日期：2020年2月10日（追溯注册）。