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Orthopaedic Nursing:
doi: 10.1097/NOR.0b013e3182a3016a
Research

An Empirical Study Using Range of Motion and Pain Score as Determinants for Continuous Passive Motion: Outcomes Following Total Knee Replacement Surgery in an Adult Population

Tabor, Danielle

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Abstract

BACKGROUND:

The continuous passive motion (CPM) machine is one means by which to rehabilitate the knee after total knee replacement surgery.

PURPOSE:

This study sought to determine which total knee replacement patients, if any, benefit from the use of the CPM machine.

METHODS:

For the study period, most patients received active physical therapy. Patients were placed in the CPM machine if, on postoperative day 1, they had a range of motion less than or equal to 45° and/or pain score of 8 or greater on a numeric rating scale of 0–10, 0 being no pain and 10 being the worst pain.

RESULTS:

Both groups of patients healed at similar rates. The incidence of adverse events, length of stay, and functional outcomes was comparable between groups.

CONCLUSION:

Given the demonstrated lack of relative benefit to the patient and the cost of the CPM, this study supported discontinuing the routine use of the CPM.

© 2013 by National Association of Orthopaedic Nurses

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