Plantar pressure changes using a novel negative pressure wound therapy technique

J Am Podiatr Med Assoc. 2004 Sep-Oct;94(5):456-60. doi: 10.7547/0940456.

Abstract

This study evaluated changes in pressure imparted to diabetic foot wounds using a novel negative pressure bridging technique coupled with a robust removable cast walker. Ten patients had plantar pressures assessed with and without a bridged negative pressure dressing on the foot. Off-loading was accomplished with a pressure-relief walker. Plantar pressures were recorded using two pressure-measurement systems. The location and value of peak focal pressure (taken from six midgait steps) were recorded at the site of ulceration. Paired analysis revealed a large difference (mean +/- SD, 74.6% +/- 6.0%) between baseline barefoot pressure and pressure within the pressure-relief walker (mean +/- SD, 939.1 +/- 195.1 versus 235.7 +/- 66.1 kPa). There was a mean +/- SD 9.9% +/- 5.6% higher pressure in the combination device compared with the pressure-relief walker alone (mean +/- SD, 258.0 +/- 69.7 versus 235.7 +/- 66.1 kPa). This difference was only 2% of the initial barefoot pressure imparted to the wound. A modified negative pressure dressing coupled with a robust removable cast walker may not impart undue additional stress to the plantar aspect of the foot and may allow patients to retain some degree of freedom (and a potentially reduced length of hospital stay) while still allowing for the beneficial effects of negative pressure wound therapy and sufficient off-loading.

Publication types

  • Clinical Trial
  • Comparative Study

MeSH terms

  • Bandages
  • Combined Modality Therapy
  • Diabetic Foot / physiopathology*
  • Diabetic Foot / therapy*
  • Female
  • Foot / physiopathology
  • Humans
  • Male
  • Middle Aged
  • Orthotic Devices
  • Pressure
  • Treatment Outcome
  • Vacuum
  • Weight-Bearing
  • Wound Healing*