Symmetrisleep Pressure Mapping

I often get questions regarding using a “sleep system” with air mattresses or alternating pressure mattresses - therapists are concerned that the effectiveness of the mattress might be diminished. So in collaboration with a local supplier, we did some pressure mapping studies.

I was hoping to find during our “pressure mapping study”, that;
●   Symmetrisleep enhances immersion on foam mattress
●   Symmetrisleep does not reduce the effects of Reactive Hyperaemia on an alternating air mattress  (dynamic). Reactive Hyperaemia is when blood flow boosts to an area after pressure is taken off, helping heal tissues that were at risk or damaged by pressure or shear.
●   Symmetrisleep reduces high pressure values

During our session we used a foam mattress and an alternating pressure mattress, with the aim to see the effects of the Symmetrisleep Air Mantle and positioning brackets in relation to immersion, peak and offloading pressure.

On each mattress we completed the steps of pressure mapping the mattress, then with the Air Mantle, and finished with a typical sleep system set up, with both brackets and air mantel, with me as the sleeping subject. 
●   Subject (me) was able to reposition without assistance
●   Male 179cm 89KG
●   Foam mattress
●   Symmentrisleep Adult Starter Kit 

Foam Mattress

The results with the Air Mantle and the full system were as we expected, with low & peak pressure being reduced, overall surface area increased, therefore better immersion.

Alternating Air Mattress

Years of working with alternating air mattresses had taught me that any surface between the mattress and the client will reduce the effectiveness of the mattress, and reduce the effects of Reactive Hyperaemia. However, this was not case, peak pressure was reduced and offload pressure maintained at 5mm Hg, which is an incredible result! Remember for Reactive Hypereamia to work there is the requirement that pressure is applied to an area of the body for a period of time and then the pressure is removed (not slightly reduced) which allows blood to rush into that area and the process repeats.  These results prove that reactive hyperaemia can be achieved with the Symmetrisleep system.

The Symmetrisleep system can be used with confidence on both foam and alternating air mattresses, ensuring that pressure care is maintained regardless of mattress choice.  This will allow the sleeping/night-time component of 24 hour postural care to be addressed, regardless of the type of bed being utilised.

Radley Woodhouse is the Postural Care and Pediatric Unit Manager for Sunrise Medical in Australia