Upright vs. supine shape-capturing comparison for custom-contoured cushions.

Area of Science:

• Biomedical Engineering
• Rehabilitation Technology
• Clinical Biomechanics

Background:

• Pressure injuries are a significant risk for wheelchair users.
• Custom-contoured wheelchair cushions aim to mitigate this risk.
• Optimal shape-capturing methods are crucial for effective cushion design.

Purpose of the Study:

• To evaluate and compare different shape-capturing positions for creating custom wheelchair cushions.
• To determine the best practice for shape acquisition to minimize pressure injury risk.

Main Methods:

• Compared pressure redistribution qualities using peak pressure index (PPI).
• Evaluated custom-contoured seating systems molded in supine versus upright positions.
• Utilized a within-subjects design with 14 able-bodied participants.

Main Results:

• Supine shape-capturing resulted in a statistically significant lower peak pressure index (PPI) compared to the upright position.
• Statistical analysis included Wilcoxon signed-rank test and paired t-test.
• The findings indicate superior pressure distribution with supine molding.

Conclusions:

• Shape-capturing in the supine position offers superior pressure distribution compared to the upright position.
• Custom-contoured cushions molded in the supine position can effectively reduce the risk of pressure injuries.
• This study identifies supine shape-capturing as a best practice for wheelchair cushion fabrication.