Custom-contoured seating from unloaded shape capture: A pilot study.

Area of Science:

• Biomedical Engineering
• Rehabilitation Engineering
• Materials Science

Background:

• Traditional custom seating relies on loaded buttock shape capture.
• Off-the-shelf pressure-relieving cushions are widely used.
• Novel methods for seating design are needed to improve pressure redistribution and support.

Purpose of the Study:

• To compare an innovative unloaded shape capture method for seating with standard pressure-relieving cushions.
• To evaluate the pressure redistribution and postural support characteristics of the novel cushion design.

Main Methods:

• A pilot trial comparing a cushion from an unloaded shape-capture method to off-the-shelf pressure-relieving cushions.
• Analysis of outcomes using descriptive statistics: peak pressure index (PPI), average pressure, surface contact, and quadrant distribution.
• Assessment of perceived postural support.

Main Results:

• No significant difference in peak pressure was found between the unloaded shape-capture cushion and off-the-shelf cushions.
• A significant reduction in pressure was observed with the unloaded shape-capture cushion compared to sling seat and non-contoured foam cushions (p = .008).
• The unloaded shape-capture cushion demonstrated comparable pressure redistribution to existing cushions.

Conclusions:

• The unloaded shape-capture method yields seating with pressure redistribution similar to current market options.
• This method provides superior postural support compared to basic foam and sling seat cushions.
• The unloaded shape-capture technique is a feasible alternative to traditional loaded methods, warranting further investigation.