Pressure Ulcer Prevention: Optimizing a Temporally Redistributing Support Interface

Abstract

Abstract:One of the most common complications from long-term wheelchair use or bed rest is pressure ulcers. Pressure ulcers have significant morbidity and are associated with high mortality. Prolonged sitting can cause high pressures in the skin and subcutaneous tissue which can lead to local ischemia and breakdown of skin. Rapid relief of pressure prevents ulcer formation. One prevention strategy is to change the temporal distribution of pressure at the interface between user and surface so that no one area is subjected to high pressures for long periods of time. While there are several dynamic interfaces in use currently, there is no definitive evidence of enhanced pressure ulcer prevention with their use. The purpose of this research was to parametrically evaluate interface array sizes, shapes and patterns for dynamic support surfaces to optimize pressure redistribution to prevent pressure ulcers. Finite element analyses, anatomical phantom deep tissue pressure measurements and interface pressure mapping were used to test various support geometries and sizes and different array spacing and patterns. Results indicate that modulating pressure in an array of supports that are equally spaced is not effective. Only interrupted pattern arrays resulted in sufficient pressure reduction. These data suggest that dynamic surface supports can be optimized based on the geometry and size of the individual supports and the pattern of the array to further reduce the likelihood of pressure ulcer formation.

Towards the Development of an Alternating Pressure Overlay for the Treatment of Pressure Ulcers Using Miniaturised Air Cells

“…The inflating/deflating pressure pattern will be predefined. The pressure pattern of the zones will be an randomised pattern rather than a regular pattern which is proven to be much effective [11]. An example of the sequence of the pressure pattern in the zone 3 is shown in Fig.…”

Bedsores Management: Efficiency Simulation of a New Mattress Design

“…The mattress cavity has a supporting grid shown in Figure 1 that holds every cube in place; the grid has a height of 2 cm with a thickness of 0.5 cm. Removing the cubes will be a solution to the static cushion deficiency in reliving pressure on bony landmarks [ 19 ]. The cubes can be removed, rearranged, and kept without alterations as a normal bed mattress according to the situation and the patient’s need.…”