Putnam M D, Meyer N J, Nelson E W, Gesensway D, Lewis J L
Hand Surgical Service, Department of Orthopaedic Surgery, University of Minnesota, Minneapolis 55455, USA.
J Hand Surg Am. 2000 May;25(3):469-75. doi: 10.1053/jhsu.2000.6915.
The purpose of this study was to establish the relationship between force at the distal radius and power grip force of the hand, a common functional and rehabilitation maneuver. This information will provide limits of allowable grip forces during postfixation rehabilitation and guide design requirements for fixation systems. By designing a model of power grip using the extrinsic hand musculotendinous units, we were able to compare grip force with force at the distal radius. Our results show that to obtain 10 N of grip force, approximately 26.3 N of force is transmitted through the distal radius, 52.4 N is transmitted through the radius and ulna combined, and 30.0 N needs to be applied to the flexor tendons. Fifty-one percent of the total forearm force was transmitted through the distal radius in this model. If all forearm forces were transmitted through the radius, 52 N of force would be transmitted through the distal radius to obtain 10 N of grip force. The clinical application of this model suggests that since failure forces of tested distal radius fixation systems range from 55 to 825 N, rehabilitation grip force should not exceed 10 to 159 N, depending on the type of fixation.
本研究的目的是建立桡骨远端受力与手部强力握力之间的关系，这是一种常见的功能和康复动作。该信息将为固定术后康复期间允许的握力提供限度，并指导固定系统的设计要求。通过使用手部外在肌腱单位设计一个强力握力模型，我们能够将握力与桡骨远端的受力进行比较。我们的结果表明，要获得10 N的握力，约26.3 N的力通过桡骨远端传递，52.4 N的力通过桡骨和尺骨共同传递，30.0 N的力需要施加到屈肌腱上。在该模型中，前臂总受力的51%通过桡骨远端传递。如果所有前臂力都通过桡骨传递，那么要获得10 N的握力，52 N的力将通过桡骨远端传递。该模型的临床应用表明，由于测试的桡骨远端固定系统的失效力范围为55至825 N，康复握力不应超过10至159 N，具体取决于固定类型。
