• Rationale and Comments

    Two high-quality studies (Beaupre 2001, Denis 2006) and five moderate-quality studies (Can 2003, Chen 2013, Herbold 2014, MacDonald 2000, Montgomery 1996) compared the utilization of continuous passive motion during hospital stay to no utilization of continuous passive motion. The combined results provide strong evidence that the surgical outcomes for those who used continuous passive motion are not better than for those who did not use continuous passive motion. Five of the seven studies measured outcomes of physical function and quality of life. Beaupre, Denis, Herbold, and MacDonald found no significant differences in a gamut of outcomes (Western Ontario and McMaster Universities Osteoarthritis Index, 36-Item Short Form Health Survey, Timed “up + go”, functional independence measure, and Knee Society Score). Chen reported better quality of life in the group that did not use continuous passive motion. Knee range of motion was investigated by Beaupre, Denis, and Chen. Meta-analysis showed no differences in knee range of motion. Complications were evaluated by Beaupre and Denis and were not statistically different between groups. Beaupra, Can, Chen, MacDonald, and Montgomery demonstrated that pain and stiffness were not decreased by continuous passive motion, whereas Denis reported significantly less pain in the continuous passive motion group (12 points difference in visual analog scale ranging from 0 to100). Meta-analysis from Denis, Herbold, and Montgomery showed no differences in length of hospital stay. One high-quality study (Lenssen 2008) demonstrated no statistically significant benefits in functional outcome scores or range of motion with the use of continuous passive motion in conjunction with physical therapy compared to physical therapy alone. The continuous passive motion was used for 17 consecutive days after surgery (about two weeks after discharge). Continuous passive motion should not be used routinely for every knee arthroplasty, as there have been no differences in active knee range of motion, pain, function, or quality of life (Harvey 2014). Continuous passive motion has been used after manipulation under anesthesia performed after knee surgery, although there are no studies to support this in the arthroplasty literature (Bram 2019).

    Sponsoring Organizations

    • American Academy of Orthopaedic Surgeons


    • Cochrane Database of Systematic Reviews


    • Orthopedic


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    • Bram JT, Gambone AJ, DeFrancesco CJ, Striano BM, Ganley TJ. Use of continuous passive motion reduces rates of arthrofibrosis after anterior cruciate ligament reconstruction in a pediatric population. Orthopedics. 2019;42:81-85.
    • Can F, Alpaslan M. Continuous passive motion on pain management in patients with total knee arthroplasty. Pain Clinic. 2003;4:479-485.
    • Chen LH, Chen CH, Lin SY, Chien SH, Su JY, Huang CY, Wang HY, Chou CL, Tsai TY, Cheng YM, Huang HT. Aggressive continuous passive motion exercise does not improve knee range of motion after total knee arthroplasty. J Clin Nurs. 2013;3:389-394.
    • Denis M, Moffet H, Caron F, Ouellet D, Paquet J, Nolet L. Effectiveness of continuous passive motion and conventional physical therapy after total knee arthroplasty: a randomized clinical trial. Phys Ther. 2006;2:174-185.
    • Harvey LA, Brosseau L, Herbert RD. Continuous passive motion following total knee arthroplasty in people with arthritis. Cochrane Database Syst Rev. 2014;6(2).
    • Herbold JA, Bonistall K, Blackburn M, Agolli J, Gaston S, Gross C, Kuta A, Babyar S. Randomized controlled trial of the effectiveness of continuous passive motion after total knee replacement. Arch Phys Med Rehabil. 2014;7:1240-1245.
    • MacDonald SJ, Bourne RB, Rorabeck CH, McCalden RW, Kramer J, Vaz M. Prospective randomized clinical trial of continuous passive motion after total knee arthroplasty. Clin Orthop Relat Res. 2000;380:30-35.
    • Montgomery F, Eliasson M. Continuous passive motion compared to active physical therapy after knee arthroplasty: similar hospitalization times in a randomized study of 68 patients. Acta Orthop Scand. 1996;1:7-9.