How does support surface help reduce the risk of pressure ulcer?

Pressure redistribution can be achieved by removal of pressure from the affected part of the body or by reducing pressure by spreading weight more widely.
Alternating pressure support surfaces redistribute pressure by cyclically inflating and deflating zones of the surface. As a result they are less reliant than reactive surfaces on the properties. of immersion and envelopment to redistribute pressure. The ideal frequency, duration, amplitude and rate of inflation and deflation have not been determined.

Aims of repositioning:

1. Reduce or relieve the pressure on the area at risk

2. Maintain muscle mass & tissue integrity

3. Ensure adequate blood supply

Regular repositioning prevents pressure ulcers by reducing the duration of pressure and shearing forces.

Encourage adults who have been assessed as being:
At risk of developing a pressure ulcer to change their position frequently and at least every 6 hours.