Selection Of Pressure Relief Cushions

By Maryanne Goff


Pressure relief cushions are an important tool for helping individuals required to sit in wheelchairs for long periods of time. They help to maintain the health of the skin by distributing pressure in a variety of ways. They also help give postural stability and prevent shear force.

When skin and tissue are compressed between bone and the chair, the blood cannot circulate properly and oxygen and nutrient supply to the cells decreases. Weight bearing bones near the skin surface, like the buttocks, are particularly at risk. This may result in ulcers that can be very serious, leading to hospitalization and surgery. Shear force occurs when the skin and tissue are pulled in different directions, such as when an individual slides down in the chair.

A cushion has to be selected according to individual requirements. A clinical professional is best able to decide on what is most suitable for a particular individual. Factors such as spinal problems and incontinence must be considered as well as how much time is spent in the chair and how much mobility there is.

The wheelchair and cushion must work together. There are many sizes and depth of cushions available. The correct one has to be chosen to ensure that when the individual is sitting on the cushion, the height is correct in relation to the armrests and the back of the chair.

Different materials such as gel, foam, air and water are used in these products. This is because they are able to conform to the shape of the body, distributing weight and allowing for optimum blood flow. They all have this in common but when it comes to cost, weight, heat conduction and stability there are different advantages and disadvantages.

A foam cushion is one of the least expensive options and it comes in a range of densities and varying degrees of memory. If the foam is cross cut, contoured or convoluted, it allows greater conformity so that the surface moves with the user. As it is relatively inexpensive and easy to cut, a therapist can experiment with shapes without incurring too much expense. On the downside it does wear down more quickly than other materials, losing its shape and becoming compressed.

Air filled cushions are comfortable and widely used. Those with pumps that allow rows of cells filled with air to inflate and deflate, thus alternating the point of pressure, are particularly effective. The main disadvantage is that an air cushion has to be checked regularly to make sure that it is properly inflated.

A gel cushion conforms well to body shape and movement, providing good weight distribution. It is also suitable for those who often feel hot and sweaty as it helps to keep the skin feeling cool. However, it is heavy in weight which makes it unsuitable for users who often have to be lifted in and out of the car or the wheelchair.

The cost of pressure relief cushions can vary considerably, according to the materials with which they are made, covers, size and depth. It is worthwhile to purchase a product with proven performance over time. This may not be the cheapest option but durability, comfort and effectiveness should take precedence over cost.




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