Rempel D, Manojlovic R, Levinsohn D G, Bloom T, Gordon L
Ergonomics Laboratory, University of California, Richmond 94804.
J Hand Surg Am. 1994 Jan;19(1):106-10. doi: 10.1016/0363-5023(94)90231-3.
We investigated how repetitive hand activity normally affects carpal tunnel pressure and whether a flexible wrist splint can influence this effect. Nineteen healthy subjects were evaluated under four test conditions: at rest with and without a wrist splint (baseline) and while performing a repetitive task with and without a wrist splint. The task involved loading and unloading 1 lb. cans from a box at a rate of 20 cans per minute for period of 5 minutes. Carpal tunnel pressure and wrist angles were continuously monitored by means of a fluid-filled catheter inserted into the carpal canal and a two-channel electrogoniometer mounted on the dorsum of the hand and forearm. Without the splint, carpal tunnel pressure rose from a median baseline level of 8 +/- 6 mmHg to 18 +/- 13 mmHg during activity. With the splint, carpal tunnel pressure rose from a baseline of 13 +/- 5 mmHg to 21 +/- 12 mmHg during activity. Median carpal tunnel pressure during activity with the splint was no different from that without the splint. Our data indicate that the median nerve is subjected to increased pressure within the carpal tunnel during repetitive hand activity. Wearing a flexible wrist splint during activity limits the range of wrist motion but has no significant effect on carpal tunnel pressure.
我们研究了重复性手部活动通常如何影响腕管压力，以及柔性腕部支具是否会影响这种效应。对19名健康受试者在四种测试条件下进行了评估：佩戴和不佩戴腕部支具时的静息状态（基线），以及佩戴和不佩戴腕部支具时进行重复性任务期间。该任务包括以每分钟20罐的速度从一个盒子中装卸1磅重的罐头，持续5分钟。通过插入腕管的充液导管和安装在手背及前臂上的双通道电子测角仪连续监测腕管压力和腕部角度。不佩戴支具时，活动期间腕管压力从中位基线水平8±6 mmHg升至18±13 mmHg。佩戴支具时，活动期间腕管压力从基线水平13±5 mmHg升至21±12 mmHg。佩戴支具活动期间的中位腕管压力与不佩戴支具时无差异。我们的数据表明，重复性手部活动期间，正中神经在腕管内承受的压力增加。活动期间佩戴柔性腕部支具会限制腕部运动范围，但对腕管压力无显著影响。
