title: Randomized controlled trial of the effectiveness of continuous passive motion after total knee replacement.
abstract: OBJECTIVE
  To determine the effects of using a continuous passive motion (CPM) device for individuals with poor range of motion (ROM) after a total knee replacement (TKR) admitted for postacute rehabilitation.
  
  
  METHODS
  Randomized controlled trial.
  
  
  METHODS
  Inpatient rehabilitation facility (IRF).
  
  
  METHODS
  Adults (N=141) after TKR with initial active knee flexion <75° on admission to the IRF.
  
  
  METHODS
  Two randomized groups: group 1 (n=71) received the conventional 3 hours of therapy per day, and group 2 (n=70) received the addition of daily CPM use for 2 hours throughout their length of stay.
  
  
  METHODS
  The primary outcome measure was active knee flexion ROM. Secondary outcome measures included active knee extension ROM length of stay, estimate of function using the FIM and Timed Up and Go test, girth measurement, and self-reported Western Ontario and McMaster Universities Osteoarthritis Index scores.
  
  
  RESULTS
  All subjects significantly improved from admission to discharge in all outcome measures. However, there were no statistically significant differences in any of the discharge outcome measures of the CPM group compared with the non-CPM group.
  
  
  CONCLUSIONS
  CPM does not provide an additional benefit over the conventional interventions used in an IRF for patient after TKR, specifically in patients with poor initial knee flexion ROM after surgery.
authors.affiliation: Department of Outcomes and Clinical Research, Burke Rehabilitation Hospital, White Plains, NY; Department of Physical Therapy, Nova Southeastern University, Fort Lauderdale, FL. Electronic address: jherbold@burke.org.
authors.forename: Janet A
authors.initials: JA
authors.lastname: Herbold
authors.affiliation: Department of Outcomes and Clinical Research, Burke Rehabilitation Hospital, White Plains, NY.
authors.forename: Kristen
authors.initials: K
authors.lastname: Bonistall
authors.affiliation: Department of Outcomes and Clinical Research, Burke Rehabilitation Hospital, White Plains, NY.
authors.forename: Marielle
authors.initials: M
authors.lastname: Blackburn
authors.affiliation: Department of Physical Therapy, Hunter College/Graduate Center of City, University of New York, New York, NY.
authors.forename: Jonila
authors.initials: J
authors.lastname: Agolli
authors.affiliation: Department of Physical Therapy, Hunter College/Graduate Center of City, University of New York, New York, NY.
authors.forename: Shawn
authors.initials: S
authors.lastname: Gaston
authors.affiliation: Department of Physical Therapy, Hunter College/Graduate Center of City, University of New York, New York, NY.
authors.forename: Chana
authors.initials: C
authors.lastname: Gross
authors.affiliation: Department of Physical Therapy, Hunter College/Graduate Center of City, University of New York, New York, NY.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Kuta
authors.affiliation: Department of Physical Therapy, Hunter College/Graduate Center of City, University of New York, New York, NY.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Babyar
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000534:rehabilitation*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D015915:Motion Therapy, Continuous Passive / Q000379:methods*; D020370:Osteoarthritis, Knee / Q000601:surgery*; D016059:Range of Motion, Articular; D012047:Rehabilitation Centers
keywords: Knee replacement arthroplasty; Rehabilitation