FAQ: Pressure Management In Seating Matters Cushions

A pressure injury is a localised injury to the skin and/or underlying tissue, usually over a bony prominence caused by pressure or pressure in combination with shear. Pressure injuries are a preventable injury and can cause serious health issues to elderly, sick or immobile individuals.

Martina Tierney, Occupational Therapist and Clinical Director of Seating Matters has dedicated most of her 30 year  career to researching the impact of specialised seating on the quality of life of patients across the world.

The experienced clinical team at Seating Matters take pressure management very seriously and much consideration is given to the quality of pressure management in our chairs. 

The Seating Matters cushion is made from two distinct layers; memory foam and Dartex. This combination offers the patient a medium to high pressure redistribution. Currently too much emphasis is placed on the cushion (surface) alone as a means of pressure management. However, in order to achieve maximum pressure management in a chair, The Four Principals of Pressure Mangement in Seating are recommended. 

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  • Layer 1: 2 inches of memory foam to allow immersion and envelopment of the Ischial Tuberosities (ITs) into the cushion, this immersion gives stability and reduces shear and friction.
  • Layer 2; A dense foam which provides stability to the memory foam to prevent bottoming out. 

The cushion is then covered by a Dartex material, which will fit the contours of both the cushion and body giving the required level of support. Dartex fabrics also offer great stretch recovery which will help prevent sagging and will therefore provide a more comfortable and effective support surface for longer. With the Dartex cover, the cushion offers a degree of moisture vapour premeability to ensure that the cushion remains dry and comfortable. Any surface next to the skin can interfere with its natural temperature and moisture control can also aggravate the risk to the patient. This is avoided by using Dartex. The cushion will give sufficient anti-slip, as excess surface friciton can add to the risk of developing a pressure injury. 

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All Seating Matters chairs come as standard with a removable cushion and baseboard. This facilitates the use of any other cushion which may be prescribed by the clinician. 

Often clients only think of the cushion in the chair when considering pressure management.  New industry leading research by Ulster University and Seating Matters has revealed there are four areas that collectively, should be adhered to to ensure that optimum pressure management is achieved whist seated, not just the cushion.  Results were staggering when these steps were implemented correctly, including an 88% reduction in pressure injuries.*

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The Four Principals of Pressure Management;

  1. Loading the Body

When you increase an individual’s surface area contact with their chair, you reduce the pressure exerted through any one point.  Achieved through correct seat dimensions – seat height, depth, width, foot plate height and angle.

  1. Provide Postural Support

Proper support for the patient will help maintain a mid line posture and manage the distribution of pressure throughout the body.  Achieved through correct seat dimensions plus head, lateral and leg supports.

  1. Effective Re positioning

Guidelines recommend that seated individuals are re positioned every 2 hours.  This increases the  blood flow and the amount of oxygen reaching the skin. Research shows that 45° tilt can maximise the potential for significant blood flow increase and pressure reduction, this is achieved using tilt in space in the Phoenix and Sorrento chairs and back angle recline.

  1. Use an Appropriate Surface

The Seating Matters cushion is a visco memory foam based cushion coated in Dartex, an anti-shear, multi stretch material.  This allows any bony prominences to emerge into the foam, achieving maximum surface area contact and reducing interface pressure. The fact that the material is breathable helps reduce the risk of pressure ulcers developing by reducing moisture on the surface of the skin.

*Daly, O., Casey, J., Martin, S., Tierney, M. & McVey, O. (2013) The effectiveness of specialist seating provision for nursing home residents, Ulster University.

Learn more about pressure cushions today!

Click here to read about the common mistakes made when using pressure cushions.

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