To determine the effect of noncontact normothermic wound therapy (NNWT) versus standard wound care on chronic full-thickness pressure ulcers.
Prospective, randomized, controlled trial
Veterans administration medical center and 7 long-term-care facilities
40 inpatients with 43 Stage III and IV pressure ulcers
A sterile noncontact wound dressing was applied to 21 wounds for 24 hours per day, 7 days per week. Each day after the wound was irrigated and the noncontact dressing was changed, a heating element in the dressing was activated for 3 1-hour periods for 12 weeks or until wound closure. Twenty-two control wounds were treated with standard, moisture-retentive dressings 24 hours per day, 7 days per week for 12 weeks or until wound closure.
Measurement of wound surface area
Healing rate for the NNWT group was significantly greater than for the control group (0.52 cm2 per week and 0.23 cm2 per week, respectively;P <.02). A clinically significant increase was seen among the NNWT group in the incidence of closure among wounds that completed the entire 12-week protocol compared with controls (11 of 14 or 79% and 8 of 16 or 50%, respectively; not significant). The mean slope of the individual regression analyses for the NNWT group was significantly different from the mean slope for the control group (−0.07 and −0.033, respectively;P <.05). Large wounds in the NNWT group demonstrated a significantly greater healing rate than large wounds in the control group (P <.05).
Wounds treated with NNWT healed significantly faster than wounds in the control group. The healing rate was greatest for larger wounds treated with NNWT.
Luther C. Kloth, MS, PT, CWS, FAPTA, is Professor; Joseph E. Berman, PT, ATC, MHS, is Research Associate; Marilyn Nett, MPT, was Research Assistant at the time of the study; and Paula E. Papanek, PhD, MPT, FACSM, is Director of the Program in Exercise Science; Department of Physical Therapy, College of Health Sciences, Marquette University, Milwaukee, WI. Sonia Dumit-Minkel, MD, PT, is Senior Physical Therapist, Department of Physical Therapy, Zablocki Veterans Administration Medical Center, Milwaukee, WI.
The authors have disclosed that they have received grant/research support from Augustine Medical, Inc, Eden Prairie, MN.
Submitted November 15, 2001; accepted in revised form May 3, 2002.
The authors acknowledge Roumyana Kirova, MSCS, Marquette University, Milwaukee, WI, for statistical assistance and George W. Cherry, DPhil (Oxon), the Oxford Wound Healing Institute, Oxford, UK, for review of the manuscript.