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. 2013 Jan;471(1):258-63.
doi: 10.1007/s11999-012-2591-1.

Predictors of range of motion in patients undergoing manipulation after TKA

Harpreet S Bawa  1 , Glenn D Wera, Matthew J Kraay, Randall E Marcus, Victor M Goldberg
Affiliations

Predictors of range of motion in patients undergoing manipulation after TKA

Harpreet S Bawa et al. Clin Orthop Relat Res. 2013 Jan.

Abstract

Background: Knee stiffness or limited range of motion (ROM) after total knee arthroplasty (TKA) may compromise patient function. Patients with stiffness are usually managed with manipulation under anesthesia (MUA) to improve ROM. However, the final ROM obtained is multifactorial and may depend on factors such as comorbidities, implant type, or the timing of MUA.

Questions/purposes: We asked whether diabetes mellitus, implant type, and the interval between TKA and MUA influenced post-MUA ROM.

Methods: From a group of 2462 patients with 3224 TKAs performed between 1999 and 2007 we retrospectively reviewed 96 patients with 119 TKAs (4.3%) who underwent MUA. We determined the presence of diabetes mellitus, implant type, and the interval between TKA and MUA.

Results: The average increase in ROM after MUA was 34°. Patients with diabetes mellitus experienced lower final ROM after MUA (87.5° versus 100.3°) as did patients with cruciate-retaining (CR) prostheses versus posterior-stabilized (92.3° versus 101.6°). The interval between TKA and MUA inversely correlated with final ROM with a decrease after 75 days.

Conclusions: Most patients experience improvements in ROM after MUA. Patients with diabetes mellitus or CR prostheses are at risk for lower final ROM after MUA. Manipulation within 75 days of TKA is associated with better ROM.

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Figures

Fig. 1
Fig. 1
Final, pre-MUA, and gain in ROM based on followup intervals between TKA and MUA are shown.
See this image and copyright information in PMC

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