Choice 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 number of different factors must be taken into consideration when choosing the right cushion. It is important to have the input of a clinical professional in making the decision. How long the user spends in the chair, how much moving around takes place and other factors like incontinence and posture problems must all be considered.

The proper combination of cushion and wheelchair is also important as there are various depths and sizes of cushions for purchase. The size of wheelchair, position of armrests and height of chair back all matter when it comes to choice. An individual does not want to sit too high or too low in the chair.

There are many different types of materials used for these products. Foam, air, gel and water are all used for their ability to distribute pressure, allowing blood to circulate freely, limiting edema and enhancing healing. These materials all have different qualities with regard to stability, heat conduction, moisture absorption, weight and cost.

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.

Static air cushions use air-filled balloons or pathways for channeling the air. An air alternating cushion works with a pump that allows rows of air cells to inflate and deflate. The main drawback of an air cushion is that it requires regular maintenance to ensure the correct degree of inflation.

A gel cushion provides excellent weight distribution as it conforms to the shape of the body. It is very comfortable and it helps keep the surface temperature of the skin cool. A disadvantage is its weight as portability is important for users who frequently have to lift in and out of a wheelchair and a car.

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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