Department of Orthopaedic Surgery, David Geffen School of Medicine at UCLA, University of California Los Angeles, Los Angeles, California 90095-6902, USA.
Arthroscopy. 2011 Nov;27(11):1584-7. doi: 10.1016/j.arthro.2011.06.014. Epub 2011 Sep 1.
The "50% rule" is used commonly to guide treatment of partial tears of tendons and ligaments. The purpose of this study was to examine the history and validity of the 50% rule in arthroscopic and orthopaedic surgery. A PubMed search yielded 1,039 articles that were reviewed to identify the origins of the 50% rule for hand flexor tendon lacerations, partial anterior cruciate ligament tears, partial-thickness rotator cuff tears, and partial injuries of the long head of the biceps tendon. The rule appears to have evolved from the hand literature toward somewhat arbitrary application for other orthopaedic conditions. Little scientific information is available to support the 50% rule for these disparate entities. In our Level V opinion, the 50% rule allows surgeons to use subjective discretion in the management of prevalent orthopaedic conditions but there is very little scientific support for this ubiquitous decision-making criterion.
“50% 规则”常用于指导肌腱和韧带部分撕裂的治疗。本研究旨在检查关节镜和骨科手术中 50% 规则的历史和有效性。通过 PubMed 搜索得到了 1039 篇文章，对其进行了回顾，以确定 50% 规则在手部屈肌腱撕裂、部分前交叉韧带撕裂、部分肩袖撕裂和肱二头肌长头肌腱部分损伤中的起源。该规则似乎是从手部文献中演变而来，然后被随意应用于其他骨科疾病。对于这些不同的实体，几乎没有科学信息支持 50% 规则。在我们的 5 级意见中，50% 规则允许外科医生在管理常见的骨科疾病时使用主观判断，但几乎没有科学依据支持这一普遍的决策标准。
