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Influences of the protected passive mobilization interval on flexor tendon healing. A prospective randomized clinical study
Gelberman RH, Nunley JA II, Osterman AL, Breen TF, Dimick MP, Woo SL
Clinical Orthopaedics and Related Research 1991 Mar;(264):189-196
clinical trial
3/10 [Eligibility criteria: Yes; Random allocation: No; Concealed allocation: No; Baseline comparability: No; 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*

A prospective multicenter clinical study was carried out to determine whether improved tendon gliding could be achieved with greater durations of daily passive-motion rehabilitation after flexor tendon repair. Fifty-one patients were placed randomly into two controlled passive-motion protocols. Group 1 patients received greater intervals of passive-motion rehabilitation using a continuous passive-motion device. Group 2 patients were treated with a traditional early passive-motion protocol for tendon rehabilitation. For group 1 patients, the mean interval of controlled motion rehabilitation was 75 hours a week, and the mean number of cycles was 12,000. For group 2 patients the mean interval of controlled passive motion was four hours a week, and the mean number of cycles was 1,000. The minimum follow-up time was six months (mean 10.8 months). Using Strickland and Glogovac's formula, the mean active motion for digits in group 1 was 138 degrees +/- 6 degrees. Mean motion for tendons in group 2 was 119 degrees +/- 8 degrees. The difference between groups 1 and 2 was statistically significant. The effect of the number of tendons injured per digit within each group was not significant. The data from this experiment indicate that the duration of the daily controlled motion interval is a significant variable insofar as postrepair flexor tendon function is concerned.
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