Liu Chien-Hsiou, Yip Kai-Shun, Fan Shih-Chen
Chien-Hsiou Liu, PhD, is Associate Professor, Department of Occupational Therapy, College of Medicine, Fu Jen Catholic University, Taipei, Taiwan.
Kai-Shun Yip, is Occupational Therapist, Department of Rehabilitation, Cardinal Tien Hospital, New Taipei, Taiwan.
Am J Occup Ther. 2017 Jan/Feb;71(1):7101190010p1-7101190010p9. doi: 10.5014/ajot.2017.017681.
The objectives of this study were to investigate whether people with rheumatoid arthritis (RA) require greater muscle loads to equal the grip strength of healthy adults and to find the optimal grip distance for people with RA using carpometacarpal and metacarpophalangeal immobilization orthoses as measured by electromyography of the forearm muscles.
A 2 × 2 (Group × Orthosis) experiment and a 2 × 3 (Orthosis × Grasp Distance) factorial were conducted. Grip strength and muscle load were measured.
Grip strength was significantly lower, and muscle load was greater, in 18 participants with RA than in 18 healthy adults. No effect of orthosis use on grip strength and muscle load was found. Muscle load was lower for the 42.25-mm diameter dynamometer handle than for handles with larger diameters.
People with RA require more muscle load than healthy adults to produce the same exertion, and 42.25 mm is recommended for people with RA as the optimal grasp distance.
本研究的目的是调查类风湿性关节炎（RA）患者是否需要更大的肌肉负荷才能达到与健康成年人相同的握力，以及使用腕掌关节和掌指关节固定矫形器时，通过前臂肌肉肌电图测量，找出RA患者的最佳握距。
进行了一项2×2（组×矫形器）实验和一项2×3（矫形器×握距）析因实验。测量了握力和肌肉负荷。
18名RA患者的握力显著低于18名健康成年人，且肌肉负荷更大。未发现使用矫形器对握力和肌肉负荷有影响。直径42.25毫米的测力计手柄的肌肉负荷低于直径较大的手柄。
RA患者产生相同的用力需要比健康成年人更多的肌肉负荷，建议RA患者将42.25毫米作为最佳握距。
