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Biomechanical Efficacy of Air-Cell-Based Cushions in Preventing Recurrence of Pressure Ulcers

This study evaluates the effectiveness of air-cell-based cushions in protecting individuals with spinal cord injury and previous pressure ulcers. Computer simulations using finite element buttock models were used to analyze the effects of scars on soft tissue stresses during sitting on the cushions, and the theoretical risk for pressure ulcer recurrence.

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Biomechanical Efficacy of Air-Cell-Based Cushions in Preventing Recurrence of Pressure Ulcers

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  1. Computer simulations of efficacy of air-cell-based cushions in protecting against reoccurrence of pressure ulcers Ayelet Levy, MSc; Kara Kopplin, BS; Amit Gefen, PhD

  2. Aim • Evaluate biomechanical efficacies of air-cell-based (ACB) cushion for individuals with spinal cord injury (SCI) with previous pressure ulcers (PUs) that healed but left scars in their soft tissues. • Relevance • For individuals with SCI who depend on a wheelchair for mobility, sitting-acquired PUs are common and life endangering.

  3. Method • Used 11 finite element buttock model variants describing various scar shapes and severities to study: • Effects of scars on soft tissue stresses during sitting on ACB cushion. • Resulting theoretical risk for PU reoccurrence.

  4. Results • ACB cushion induced lower peak stress values in soft tissues of buttocks when scarring was present with respect to stress levels in (nonscarred) reference case.

  5. Conclusion • Our simulations suggest that ACB cushion is generally better at protecting patients with history of severe PUs manifested by large, possibly deep-tissue, scarring in their buttocks.

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