Ritter M A, Gandolf V S, Holston K S
Center for Hip and Knee Surgery, Mooresville, Indiana 46158.
Clin Orthop Relat Res. 1989 Jul(244):239-43.
To determine the justification of a continuous passive motion machine in the treatment of postoperative total knee arthroplasties, a comparative study of 50 consecutive patients with simultaneous bilateral total knee arthroplasties was undertaken. The patients served as their own controls because one randomly selected knee was placed in the machine while the remaining knee was treated with physical therapy only. There was no significant difference in the range of motion during the eight days of hospitalization or the follow-up visits at two weeks, two months, six months, and one year. There was a significant decrease in the swelling about the knee. The continuous passive motion treated knees appeared to be generally weaker as revealed by more extensor lags and flexor tightness at discharge from the hospital. Also, increased costs incurred from the need for additional equipment and increased staff time made the machine neither cost-effective nor beneficial.
为了确定持续被动运动机在全膝关节置换术后治疗中的合理性，对50例连续进行双侧全膝关节置换术的患者进行了一项对照研究。这些患者自身作为对照，因为随机选择一侧膝关节置于持续被动运动机中，而另一侧膝关节仅接受物理治疗。在住院的8天期间以及术后2周、2个月、6个月和1年的随访中，两侧膝关节的活动范围没有显著差异。膝关节周围的肿胀有显著减轻。从医院出院时的情况来看，持续被动运动治疗的膝关节通常显得更弱，表现为更多的伸肌滞后和屈肌紧张。此外，因需要额外设备和增加工作人员时间而导致的成本增加，使得该机器既不具有成本效益也无益处。
