a wireless lingual feedback device to reduce overpressures in seated posture a feasibility study无线舌反馈装置以减少超坐姿可行性研究.pdfVIP

A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study 1,2 1 1 1 Olivier Chenu *, Nicolas Vuillerme , Jacques Demongeot , Yohan Payan 1Techniques for biomedical engineering and complexity management - informatics, mathematics and applications - Grenoble (TIMC-IMAG) - UMR UJF CNRS 5525 - Domaine de la Merci, La Tronche, France, 2 IDS SA - 71300 Montceau les mines, France Abstract Background: Pressure sores are localized injuries to the skin and underlying tissues and are mainly resulting from overpressure. Paraplegic peoples are particularly subjects to pressure sores because of long-time seated postures and sensory deprivation at the lower limbs. Methodology/Principal Findings: Here we report outcomes of a feasibility trial involving a biofeedback system aimed at reducing buttock overpressure whilst an individual is seated. The system consists of (1) pressure sensors, (2) a laptop coupling sensors and actuator (3) a wireless Tongue Display Unit (TDU) consisting of a circuit embedded in a dental retainer with electrodes put in contact with the tongue. The principle consists in (1) detecting overpressures in people who are seated over long periods of time, (2) estimating a postural change that could reduce these overpressures and (3) communicating this change through directional information transmitted by the TDU.Twenty-four healthy subjects voluntarily participated in this study. Twelve healthy subjects initially formed the experimental group (EG) and were seated on a chair with the wireless TDU inside their mouth. They were asked to follow TDU order