A randomized control trial to evaluate pressure-reducing seat cushions for elderly wheelchair users

Area of Science:

• Gerontology
• Biomedical Engineering
• Wound Care

Background:

• Elderly nursing home residents using wheelchairs are at high risk for developing pressure ulcers.
• Current seating interventions, including foam cushions, may not adequately prevent pressure ulcer development.
• Pressure-reducing cushions aim to mitigate tissue damage from prolonged sitting.

Purpose of the Study:

• To compare the effectiveness of pressure-reducing cushions versus foam cushions in preventing pressure ulcers in high-risk elderly wheelchair users.
• To assess differences in pressure ulcer incidence, time to ulceration, and peak interface pressures.
• To determine the feasibility of a larger, definitive clinical trial.

Main Methods:

• A randomized controlled trial was conducted in skilled nursing facilities.
• Participants included 32 at-risk elderly wheelchair users (age ≥ 65) with Braden Scale scores ≤ 18.
• Interventions involved seating evaluation and prescription of either foam or pressure-reducing cushions, with weekly assessments.

Main Results:

• No significant differences were found between cushion types for overall pressure ulcer incidence or time to ulceration.
• Pressure-reducing cushions demonstrated superior effectiveness in preventing ischial pressure ulcers (P<.005).
• Higher interface pressures correlated with increased pressure ulcer incidence (P<.001).

Conclusions:

• A definitive multicenter randomized controlled trial on wheelchair cushions is feasible with 50-100 participants per group.
• Future trials should specifically define sitting-acquired pressure ulcers as lesions over the ischial tuberosities.
• While overall incidence was similar, pressure-reducing cushions offer targeted benefits for ischial pressure ulcer prevention.