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<title>Continuous passive motion</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Continuous passive motion</span></span>

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</style><table class="infobox"><tbody><tr><th colspan="2" class="infobox-above" style="background-color: #00BFFF">Continuous passive motion</th></tr><tr><td colspan="2" class="infobox-image"><div class="infobox-caption">A continuous passive motion machine for knee joint recovery</div></td></tr><tr><td colspan="2" class="infobox-full-data"><div style="text-align: right;">[<a href="https://www.wikidata.org/wiki/Q4379950" class="extiw external" title="d:Q4379950">edit on Wikidata</a>]</div></td></tr></tbody></table>

<p><b>Continuous passive motion</b> (CPM) devices are used during the first phase of rehabilitation following a soft tissue surgical procedure or trauma. The goals of phase 1 rehabilitation are: control post-operative pain, reduce inflammation, provide passive motion in a specific plane of movement, and protect the healing repair or tissue. CPM is carried out by a CPM device, which constantly moves the joint through a controlled <a href="Range_of_motion" title="Range of motion">range of motion</a>; the exact range is dependent upon the joint, but in most cases the range of motion is increased over time.

</p><p>CPM is used following various types of reconstructive joint surgery such as <a href="Knee_replacement" title="Knee replacement">knee replacement</a> and <a href="ACL_reconstruction" class="mw-redirect" title="ACL reconstruction">ACL reconstruction</a>. Its mechanisms of action for aiding joint recovery are dependent upon what surgery is performed. One mechanism is the movement of <a href="Synovial_fluid" title="Synovial fluid">synovial fluid</a> to allow for better diffusion of nutrients into damaged <a href="Cartilage" title="Cartilage">cartilage</a>, and <a href="Diffusion" title="Diffusion">diffusion</a> of other materials out; such as blood and metabolic waste products. Another mechanism is the prevention of fibrous <a href="Scar" title="Scar">scar</a> tissue formation in the joint, which tends to decrease the range of motion for a joint. The concept was created by <a href="Robert_B._Salter" title="Robert B. Salter">Robert B. Salter</a> M.D in 1970 and, along with help from engineer <a href="John_Saringer" title="John Saringer">John Saringer</a>, a device was created in 1978.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="CPM_Following_Knee_Arthroplasty">CPM Following Knee Arthroplasty</h2></div>

<p>For people who have had total knee replacement without complications, continuous passive motion has been shown to provide clinically relevant benefits. CPM does improve long-term function, long-term knee flexion, knee extension in the short or long term. In unusual cases where the person has problems which prevent standard mobilization treatment, then CPM is found useful.

</p><p>Although studies in the past have shown a benefit of the use of CPM in those individuals having undergone a TKA, recent research has shown that the benefits are questionable.<sup id="cite_ref-Yang_Li_Wang_Wang_2019_3-0" class="reference"><a href="#cite_note-Yang_Li_Wang_Wang_2019-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Dávila_Castrodad_Recai_Abraham_et_al_2019_4-0" class="reference"><a href="#cite_note-Dávila_Castrodad_Recai_Abraham_et_al_2019-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> When groups that only received standard mobilization therapies were compared to groups that received CPM treatment in addition to this same therapy, the results suggest that there is no significant increase in functional outcomes or length of hospital stay, or a decrease in adverse affects related to the surgery.<sup id="cite_ref-Yang_Li_Wang_Wang_2019_3-1" class="reference"><a href="#cite_note-Yang_Li_Wang_Wang_2019-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> These results weren't adequate for supporting the use of CPM over potentially more successful interventions, such as active exercise that is both high in intensity and velocity.<sup id="cite_ref-Yang_Li_Wang_Wang_2019_3-2" class="reference"><a href="#cite_note-Yang_Li_Wang_Wang_2019-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Given the lack of support in current literature, the use of CPM over other treatment is not advised for most patients having undergone a TKA, nor is its use recommended as a standard procedure in clinical practice.<sup id="cite_ref-Yang_Li_Wang_Wang_2019_3-3" class="reference"><a href="#cite_note-Yang_Li_Wang_Wang_2019-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Dávila_Castrodad_Recai_Abraham_et_al_2019_4-1" class="reference"><a href="#cite_note-Dávila_Castrodad_Recai_Abraham_et_al_2019-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>

</p><p>Patient compliance is key to rehabilitation. Furthermore, with patients attempting at-home therapies, must follow orders with proper form

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<div class="mw-heading mw-heading2"><h2 id="CPM_Following_Strokes">CPM Following Strokes</h2></div>

<p>There are limited occupational therapies that are fully supported across a spectrum of patients. The fundamental movements provided by the CPM units, potentially allows for a remedial and fast progressing therapy.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> This is according to the University of California. This is an untapped potential for stroke patients that needs to be further explored, according to the same source. CPM units are a rare form of therapy that directly correlates the amount of use to the amount of progress. It is easy to neglect at-home therapeutic exercises for various reasons, but CPMs can be used while watching television or doing anything stationary. This ability to multi-task therapy with recreational activities hold higher promise for patients completing the therapy at home. Completing the therapy at home is just as important as prescribing it. That is why some studies suggest physical and occupational therapy yield better results than CPM units. CPM units should be used supplementary; also, these studies have fully compliant PT and OT patients whereas most patients do not fulfill their at-home exercises as often or with proper form that is suggested in these studies.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFSalter1989" class="citation journal cs1">Salter, Robert B. (May 1989). "The Biologic Concept of Continuous Passive Motion of Synovial Joints: The First 18 Years of Basic Research and Its Clinical Application". <i>Clinical Orthopaedics and Related Research</i>. <b>242</b>: <span class="nowrap">12–</span>25. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1097%2F00003086-198905000-00003">10.1097/00003086-198905000-00003</a>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/2650945">2650945</a>.</cite></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite id="CITEREFSalterHamiltonWedgeTile1983" class="citation journal cs1">Salter, Robert B; Hamilton, Henry W; Wedge, John H; Tile, Marvin; Torode, Ian P; O'Driscoll, Shawn W; Murnaghan, John J; Saringer, John H (1983). "Clinical application of basic research on continuous passive motion for disorders and injuries of synovial joints: A preliminary report of a feasibility study". <i>Journal of Orthopaedic Research</i>. <b>1</b> (3): <span class="nowrap">325–</span>342. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fjor.1100010313">10.1002/jor.1100010313</a>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/6481515">6481515</a>. <a href="S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:73955247">73955247</a>.</cite></span>

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<li id="cite_note-Yang_Li_Wang_Wang_2019-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Yang_Li_Wang_Wang_2019_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Yang_Li_Wang_Wang_2019_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Yang_Li_Wang_Wang_2019_3-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Yang_Li_Wang_Wang_2019_3-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text"><cite id="CITEREFYangLiWangWang2019" class="citation journal cs1">Yang, Xia; Li, Guo-hong; Wang, Hui-jie; Wang, Cao-yuan (September 2019). "Continuous Passive Motion After Total Knee Arthroplasty: A Systematic Review and Meta-analysis of Associated Effects on Clinical Outcomes". <i>Archives of Physical Medicine and Rehabilitation</i>. <b>100</b> (9): <span class="nowrap">1763–</span>1778. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.apmr.2019.02.001">10.1016/j.apmr.2019.02.001</a>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/30831093">30831093</a>.</cite></span>

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<li id="cite_note-Dávila_Castrodad_Recai_Abraham_et_al_2019-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-Dávila_Castrodad_Recai_Abraham_et_al_2019_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Dávila_Castrodad_Recai_Abraham_et_al_2019_4-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite id="CITEREFDávila_CastrodadRecaiAbrahamEtcheson2019" class="citation journal cs1">Dávila Castrodad, Iciar M.; Recai, Thea M.; Abraham, Megha M.; Etcheson, Jennifer I.; Mohamed, Nequesha S.; Edalatpour, Armin; Delanois, Ronald E. (October 2019). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829007">"Rehabilitation protocols following total knee arthroplasty: a review of study designs and outcome measures"</a>. <i>Annals of Translational Medicine</i>. <b>7</b> (S7): S255. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.21037%2Fatm.2019.08.15">10.21037/atm.2019.08.15</a></span>. <a href="PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829007">6829007</a></span>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/31728379">31728379</a>.</cite></span>

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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite id="CITEREFMarti2011" class="citation web cs1">Marti, Jill (7 May 2011). <a rel="nofollow" class="external text" href="https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=279def1b6bf2e5454b6dce933fb0936925fe39a1">"The Effects of Continuous Passive Motion Interventions on Function in Patients Following Hemiplegic Stroke"</a>.</cite></span>

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<li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><cite id="CITEREFCampbell2001" class="citation journal cs1">Campbell, R (2001). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1731838">"Why don't patients do their exercises? Understanding non-compliance with physiotherapy in patients with osteoarthritis of the knee"</a>. <i>Journal of Epidemiology & Community Health</i>. <b>55</b> (2): <span class="nowrap">132–</span>138. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fjech.55.2.132">10.1136/jech.55.2.132</a>. <a href="PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1731838">1731838</a></span>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/11154253">11154253</a>.</cite></span>

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<li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><cite id="CITEREFSluijsKnibbe1991" class="citation journal cs1">Sluijs, E.M.; Knibbe, J.J. (June 1991). <a rel="nofollow" class="external text" href="https://www.nivel.nl/nl/publicaties/3860">"Patient compliance with exercise: Different theoretical approaches to short-term and long-term compliance"</a>. <i>Patient Education and Counseling</i>. <b>17</b> (3): <span class="nowrap">191–</span>204. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2F0738-3991%2891%2990060-I">10.1016/0738-3991(91)90060-I</a>.</cite></span>

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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><cite id="CITEREFO'DriscollGiori2000" class="citation journal cs1">O'Driscoll, S. W.; Giori, N. J. (2000). <a rel="nofollow" class="external text" href="https://www.rehab.research.va.gov/jour/00/37/2/pdf/odriscoll.pdf">"Continuous passive motion (CPM): Theory and principles of clinical application"</a> <span class="cs1-format">(PDF)</span>. <i>Journal of Rehabilitation Research and Development</i>. <b>37</b> (2): <span class="nowrap">179–</span>88. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/10850824">10850824</a>. <a href="ProQuest" title="ProQuest">ProQuest</a> <a rel="nofollow" class="external text" href="https://www.proquest.com/docview/215293752">215293752</a>.</cite></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20060827235841/http://www.arthroscopy.com/sp06000.htm">CPM — CONTINUOUS PASSIVE MOTION</a></li>

<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20100124095911/http://www.continuouspassivemotion.org/">CPM — Robert B. Salter</a></li>

<li><cite id="CITEREFSluijsKnibbe1991" class="citation journal cs1">Sluijs, E.M; Knibbe, J.J (1991). <a rel="nofollow" class="external text" href="http://postprint.nivel.nl/PPpp3860.pdf">"Patient compliance with exercise: Different theoretical approaches to short-term and long-term compliance"</a> <span class="cs1-format">(PDF)</span>. <i>Patient Education and Counseling</i>. <b>17</b> (3): <span class="nowrap">191–</span>204. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2F0738-3991%2891%2990060-I">10.1016/0738-3991(91)90060-I</a>. <a href="S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:71609643">71609643</a>.</cite></li>

<li><cite id="CITEREFCampbell2001" class="citation journal cs1">Campbell, R (2001). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1731838">"Why don't patients do their exercises? Understanding non-compliance with physiotherapy in patients with osteoarthritis of the knee"</a>. <i>Journal of Epidemiology & Community Health</i>. <b>55</b> (2): <span class="nowrap">132–</span>138. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fjech.55.2.132">10.1136/jech.55.2.132</a>. <a href="PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1731838">1731838</a></span>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/11154253">11154253</a>.</cite></li>

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