Preliminary development of an advanced modular pressure relief cushion: Testing and user evaluation

Area of Science:

• Biomedical Engineering
• Rehabilitation Engineering
• Assistive Technology Design

Background:

• Effective pressure relief cushions are a critical assistive technology need identified by the World Health Organization.
• Affordable, high-quality wheelchair cushions are essential for individuals with limited access to advanced mobility aids.

Purpose of the Study:

• To develop and evaluate a prototype modular wheelchair cushion using value-driven engineering (VdE) principles.
• To assess the performance, user satisfaction, and cost-effectiveness of the novel modular cushion compared to existing market options.

Main Methods:

• A modular cushion prototype was created using low-cost, dynamically responsive gel balls in a bilayer foam.
• Cushion performance was evaluated using ISO 16480-2 biomechanical standardized tests.
• User satisfaction was assessed via a Quebec User Evaluation of Satisfaction with Assistive Technology (QUEST 2.0) based questionnaire with 12 participants.

Main Results:

• The modular cushions demonstrated performance on par with or exceeding widely prescribed commercial cushions under standardized biomechanical testing.
• Participants reported high satisfaction with the modular cushion's appearance, comfort, safety, and ease of use.
• Preliminary cost analysis indicated significant cost-efficacy over the cushion's lifecycle, with components replaceable multiple times.

Conclusions:

• The value-driven engineering (VdE) modular cushion shows potential for providing effective pressure relief.
• This innovative design offers a low lifetime cost solution for wheelchair users.
• The study highlights the feasibility of developing advanced, affordable assistive technology.