依据三维空间测量原理设计的关节角度测量器

背景：Cybex NORM^TM型等速测试仪测量结果精确度较高，但其操作方法复杂，检查费用昂贵，不适用于常规临床检查。目的：比较OTMA和Cybex NORM^TM型等速测试仪测量肩、髋、膝关节疾病治疗前后关节活动度，验证科技专利成果关节角度测量器（Orthopedics Tool Measurement Apparatus，OTMA）的科学性和实用价值。设计、时间及地点：临床随机对照试验，2004—10／2005—03北京协和医院骨科人工关节中心。对象：将121例患者随机分成①OTMA组：肩周炎患者22例22肩；股骨头缺血性坏死患者15例21髋；膝关节骨关节炎患者24例33膝。②Cybex组：肩周炎患者21例21肩；股骨头缺血性坏死患者16例21髋；膝关节骨关节炎患者23例33膝。方法：分别应用OTMA和Cybex NORM^TM型等速测试仪对两组患者进行治疗前、治疗后3个月和1年随访时关节活动度测量；将测量数据分别在（膝关节）HSS评估量表，（肩关节）Karlsson疗效标准评估量表和（髋关节）Harris疗效标准评估量表中应用，填写VAS疼痛量表和SF-36等评估量表。主要观察指标：肩、髋和膝关节的活动度值；Karlsson、Harris和HSS评分；VAS和SF-36评分。结果：OTMA的测量结果与Cybex NORM^TM测量结果之间的符合率为98-3％;测量过程能够被所有患者接受，测量操作方法的完成率100％。关节活动度与HSS、Kaflsson、Harris的评分值有相关性（P=0．002）。结论：在三维空间测量原理指导下设计的数字化OTMA，获取结果与Cybex NORM^TM型等速测试仪相近，在测量过程中能够获得更接近于真实角度的测量值。

Orthopedics tool measurement apparatus based on three-dimensional space measurement

BACKGROUND:Cybex NORMTM isokinetic dynamometer exhibits precise measurement,but the operation is too complex and the cost is too high to apply on routine examination.OBJECTIVE:To compare orthopedics tool measurement apparatus(OTMA)and Cybex NORMTM dynamometer in evaluating the range of motion after the treatment of shoulder.hip and knee joint diseases,and to verify tlle practical value of OTMA as a scientitic patent achievement.DESIGN,TIME AND SETTING:Clinical randomized control trial was carried out in the Rcsearch Center for Orthopaedics and Artificial Joint.Peking Union Medical College Hospital from October 2004 to March 2005.PARTICIPANTS:A total of 121 patients were randomly divided into two groups.OTMA group comprised 22 patients with shoulder periarthritis(22 shoulders).1 5 patients with avascular necrosis of the femoral head(21 hips),and 24 patients with knee osteoarthritis(33 knees).Cybex group comprised 21 patients with shoulder periarthritis(21 shoulders),16 patients with avascular necrosis of the femoral head(21 hips),and 23 patients with knee osteoarthritis(33 knees).METHODS:Two groups patients were treated with OTMA or Cybex NORMTM dynamometer,respectively,the range of motion was measured before treatment and 3 months,1 year after treatment.The Hospital for Special Surgery(HSS)knee rating scale,Karisson evaluation criterion of shoulder function and Harris hip score were applied to evaluate the patients,Visual analog scale(VAS)pain scale and short-form health survey(SF-36)were also used in this study.MAIN OUTCOME MEASURES:The range of motion in shoulder,hip and knee;Karlsson,Harris and HSS scores;VAS pain score and SF-36 score.RESULTS:OTMA measurement had a coincidence with Cybex NORMTM dynamometer measurement as 98.3%.All patients accepted and completed the measurement.The range of motion Was associated with HSS.Karlsson and Harris scores (P=0.002).CONCLUSION:According to three-dimensional space measurement,the digital OTMA may obtain the outcomes similarly with Cybex NORMTM dynamometer,it is also near to the practical value of joint angles.