Development of Rubber Mattresses with Cooling Systems to Reduce the Incidence of Pressure Sores for the Elderly and Bedridden Patients

Nittaya Naphon1

Sahassawas Poojeera2

Apichat Srichat3

Anumut Siricharoenpanich4

Ponthep Vengsungnle5

Paisarn Naphon6,Email

1Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Srinakharinwirot University, 63 Rangsit-Nakhornnayok Road, Ongkharak, Nakhorn-Nayok, 26120, Thailand.
2Department of Mechanical Engineering, Faculty of Engineering, Rajamangala University of Technology Isan, Khon Kaen Campus, 32000, Thailand.
3Department of Mechanical Engineering, Faculty of Technology, Udon Thani Rajabhat, University, 41000, Thailand.
4Faculty of Industrial Education and Technology, Department of Mechanical Engineering, King Mongkut's University of Technology Thonburi, 126 PrachaUtit Rd., Bang Mot, Thung Khru, Bangkok 10140, Thailand.
5Department of Agricultural Machinery Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhonratchasima 30000, Thailand.
6Thermo-Fluids and Heat Transfer Enhancement Research Lab. (TFHT), Department of Mechanical Engineering, Faculty of Engineering, Srinakharinwirot University, 63 Rangsit-Nakhornnayok Rd., Ongkharak, Nakhorn-Nayok, 26120, Thailand.

Abstract

As of yet, no device can provide the best pressure relief; it only decreases the force exerted on the body's surface. Pressure sores may still only be avoided by physical therapy. Mattress climate is a critical factor in producing thermal comfort conditions when sleeping. This research examines a straightforward rubber mattress design with a thermoelectric air-cooling mechanism to lower the risk of pressure sores. The inlet cooling air temperature is maintained constant at 21 oC. The response of 10 volunteers lay awake on the mattress to the surface temperature at control room temperatures: switched on (25-26 oC) and switched off  (29-30 oC) air conditioning system. It was found that thermoelectric air cooling significantly affects the mattress's temperature and moisture ventilation. Compared to mattresses without air conditioning, the temperature at different locations from the thermoelectric air-cooling box is lower, about 3-5 oC. The mattress temperature at the upper zone is the highest value, and the lower zone is the lowest. Therefore, to reduce the danger of pressure sores in the elderly and bedridden patients, this system could be a substitute for constructing a cooling mattress.

Development of Rubber Mattresses with Cooling Systems to Reduce the Incidence of Pressure Sores for the Elderly and Bedridden Patients