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Updated: May 21, 2026

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

Published on: July 22, 2019

[Effectiveness of continuous passive motion after total knee replacement].

Tomasz Trzeciak¹, Magdalena Richter, Krzysztof Ruszkowski

¹Katedra i Klinika Ortopedii i Traumatologii, Uniwersytet Medyczny im. Karola Marcinkowskiego w Poznaniu. trzeciak@orsk.ump.edu.pl

Chirurgia Narzadow Ruchu I Ortopedia Polska

|June 20, 2012

Summary

Continuous passive motion (CPM) did not significantly improve clinical outcomes after total knee replacement. However, it offered some benefits in subjective pain and function assessments for patients undergoing knee surgery rehabilitation.

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Area of Science:

Orthopedics
Rehabilitation Medicine
Biomedical Engineering

Background:

Continuous passive motion (CPM) is a common early rehabilitation technique post-knee surgery.
Its effectiveness following primary total knee arthroplasty requires further clinical evaluation.
Assessing CPM's impact on clinical scores and functional recovery is crucial for optimizing patient outcomes.

Purpose of the Study:

To evaluate the efficacy of continuous passive motion (CPM) in early post-operative rehabilitation after primary total knee arthroplasty.
To compare clinical scores and functional recovery between patients receiving CPM plus active exercises and those receiving conventional physical therapy.
To determine if CPM provides a significant advantage over standard physical therapy in knee replacement recovery.

Main Methods:

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The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

Published on: July 22, 2019

A randomized controlled trial involving 93 patients (101 knee joints) undergoing total knee replacement.
The experimental group received CPM and active exercises; the control group received conventional physical therapy.
CPM was initiated on postoperative day 1, with a progressive range of motion protocol.

Main Results:

No statistically significant differences were observed in Knee Society Score (KSS) or WOMAC scores between the CPM and control groups.
The CPM group showed a slightly greater mean range of motion (83° vs. 77°), but this was not statistically significant.
Subjective assessments indicated potential benefits in pain level, joint stiffness, and functional ability for the CPM group, though overall scores showed no statistical difference.

Conclusions:

Continuous passive motion (CPM) does not demonstrate a significant advantage in improving objective clinical measurements after primary total knee arthroplasty.
CPM may offer some benefits in the subjective experience of pain, stiffness, and function for patients post-knee surgery.
Further research may be needed to clarify the specific role and optimal application of CPM in knee replacement rehabilitation protocols.