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The effect of continuous passive motion after total knee arthroplasty on joint function
Huang D, Peng Y, Su P, Ye W, Liang A
Zhongguo Linchuang Kangfu [Chinese Journal of Clinical Rehabilitation] 2003 May 25;7(11):1661-1662
clinical trial
5/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

AIM: To evaluate the role of continuous passive motion (CPM) after total knee arthroplasty (TKA) through a comparative clinical study. METHODS: 44 patients who accepted a primary TKA in our hospital were randomly assigned to one of the two groups by drawing cuts: 23 cases were treated with CPM and physical therapy among 2 weeks after operation, 21 cases received physical therapy only. All patients were followed up and the range of motion (ROM) was recorded on the seventh, tenth and fourteenth day. ROM was also measured at six weeks, three months, six months and one year after TKA. RESULTS: ROM was average 19 degrees, 15 degrees, 10 degrees, 8 degrees, 8 degrees, 2 degrees and 5 degrees greater in CPM group than that in no CPM group at 7, 10, 14 days, 6 weeks, 3, 6 months and one year after TKA (t = 4.763, 3.621, 3.529, 2.614, 2.507, 2.178, 2.117, p < 0.05). CONCLUSION: CPM is a useful machine in the rehabilitation after total knee arthroplasty which can help the patients regain the range of motion of the knee joint more quickly.

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