The search was based on combinations of the following items: continuous passive motion (or CPM), total knee arthroplasty, range of motion and range of movement. Publications related to CPM and TKA were retrieved by searching the electronic databases of PubMed, Cochrane library and Excerpt Medical Database (EMBASE) up to May 2014.

Under the preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement ( 15), a searching strategy was developed for present meta-analysis. In present review, a series of randomized controlled trials (RCTs) were retrieved to determine the association between CPM and ROM (including both active knee flexion and active knee extension) following TKA before May 2014 and a meta-analysis was performed to evaluate the effectiveness of CPM following TKA. Thus a meta-analysis is needed to integrate these data to better evaluate the therapeutic effect of CPM following TKA. Although many studies had been performed to evaluate the effectiveness of CPM following TKA, the results of these studies always seem inconsistent and inconclusive because of small sample size and uncertainties of the research subjects ( 14). Since CPM had a lot of uncertainties about the treatment effects after TKA, it is necessary to determine the effectiveness of CPM. However, a randomized, controlled trial (including 160 patients) of CPM following TKA showed that CPM provided no benefit to patients recovering from TKA ( 13). Moreover, CPM was also considered to decrease narcotic analgesics uses, to reduce the length of hospital stay ( 11) and to improve muscle strength ( 12). They found that range of knee flexion was significant greater at 48 hour in CPM group than in non-CPM group ( 10). conducted a study to determine the effects of a CPM device on knee ROM after operation of intra-articular fractures around knee on 40 patients within 48 hours after surgery. CPM is a way to provide regular movement by a machine ( 7), and is usually identified to increase knee range of motion (ROM) ( 9). Then, Salter invented the concept of CPM based on a series of experiments and theories ( 8). In 1926, Von Riemke firstly stated that movement should be conducted slowly and continuously from the first day after surgery ( 7). Due to knee stiffness after TKA, rehabilitation therapy plays an important role during the following treatments, which often includes continuous passive motion (CPM) ( 6). Total knee arthroplasty (TKA) is considered a clinically effective intervention in recent years with high rates of success in treatment of chronic knee pain and disability ( 4, 5). Īrthroplasty is an orthopedic surgery done to restore the integrity and function of a joint, which can be restored by resurfacing the bones or be replaced by an artificial joint ( 1- 3). Received: 05 February 2016 Accepted: 07 March 2016 Published. Keywords: Continuous passive motion (CPM) total knee arthroplasty (TKA) range of motion (ROM) meta-analysis Subgroup analyses showed no differences between CPM group and standard physiotherapy group.Ĭonclusions: CPM following TKA does not have clinical effects on postoperative recovery in aspect of active knee flexion ROM and active knee extension ROM at different treated times. Meta-analysis showed that there were no significant differences between CPM and non-CPM treated patients in terms of active knee flexion ROM and active knee extension ROM at time of discharge from hospital, 6 weeks, 3 months, and more than 6 months respectively. Results: Totally, nine RCTs were retrieved in this study. Publication bias was analyzed by Egger’s test. Sub-group analyses were performed based on CPM and standard physiotherapy. Heterogeneity was assessed using the I 2 statistic with significance set at a P value less than 0.10. A random-effect model was selected to calculate the pooled SMD. Effect size was measured as standardized mean differences (SMD) with 95% confidence intervals (CIs). All analyses were conducted by Stata 12.0 software.

Methods: Randomized controlled trials (RCTs) describing CPM and ROM were obtained from the databases PubMed, Cochrane library and Excerpt Medical Database (EMBASE) up to May 2014.

Thus it is necessary to determine the effectiveness of CPM on ROM following TKA. Although many clinical trials have conducted, the results were controversial. Continuous passive motion (CPM), one kind of rehabilitations following TKA, is usually identified to increase knee range of motion (ROM) and promote postoperative recovery of patients.

Policy of Dealing with Allegations of Research Misconductīackground: Total knee arthroplasty (TKA) is considered a clinically effective intervention for knee arthritis.

Policy of Screening for Plagiarism Process.

Knee passive range of motion