Evaluation of the Force Sensing Application pressure mapping system

Abstract

Pressure mapping techniques are used in wheelchair and seating services to assess posture and assist in the prevention and treatment of pressure ulcers. The Force Sensitive Application (FSA) pressure mapping systems in Wales have a high clinical use and frequent calibration is required. This project aimed to assess the performance of the systems and develop a calibration strategy. Testing of the systems was spilt into three stages. The pilot stage compared different calibration techniques (manual, automated and with new software) to determine the optimal calibration frequency. The second stage, longer term, was like the pilot stage with the best calibration method tested over 10 weeks. The third test was a simple before-and-after calibration test, conducted to determine the effect of calibration. It was concluded that the calibration process is essential to maintain the reliability of the mats and it was decided that the systems in Wales should be calibrated every 2 months to provide a more consistent output.

• Accuracy
• calibration
• pressure
• pressure measurement
• reliability

Acknowledgements

Research carried out at Rehabilitation Engineering Unit, Morriston Hospital, Swansea SA6 6NL, Wales. This study was part of a Clinical Scientist training programme. The first two authors had a temporary contract and the third author changed roles and location and became the Director of Medical Physics in 2010.