Cargando…

A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study

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 FINDI...

Descripción completa

Detalles Bibliográficos
Autores principales: Chenu, Olivier, Vuillerme, Nicolas, Demongeot, Jacques, Payan, Yohan
Formato: Texto
Lenguaje:English
Publicado: Public Library of Science 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2765637/
https://www.ncbi.nlm.nih.gov/pubmed/19888336
http://dx.doi.org/10.1371/journal.pone.0007550
_version_ 1782173161748430848
author Chenu, Olivier
Vuillerme, Nicolas
Demongeot, Jacques
Payan, Yohan
author_facet Chenu, Olivier
Vuillerme, Nicolas
Demongeot, Jacques
Payan, Yohan
author_sort Chenu, Olivier
collection PubMed
description 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 orders that were randomly spread throughout the session. They were evaluated during two experimental sessions during which 20 electro-stimulations were sent. Twelve other subjects, added retrospectively, formed the control group (CG). These subjects participated in one session of the same experiment without any biofeedback.Three dependent variables were computed: (1) the ability of subjects to reach target posture (EG versus CG), (2) high pressure reductions after a biofeedback (EG versus CG) and (3) the level of these reductions relative to their initial values (EG only). Results show (1) that EG reached target postures in 90.2% of the trials, against 5,3% in the CG, (2) a significant reduction in overpressures in the EG compared to the CG and (3), for the EG, that the higher the initial pressures were, the more they were decreased. CONCLUSIONS/SIGNIFICANCE: The findings suggest that, in this trial, subjects were able to use a tongue tactile feedback system to reduce buttock overpressure while seated. Further evaluation of this system on paraplegic subjects remains to be done.
format Text
id pubmed-2765637
institution National Center for Biotechnology Information
language English
publishDate 2009
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-27656372009-11-04 A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study Chenu, Olivier Vuillerme, Nicolas Demongeot, Jacques Payan, Yohan PLoS One Research Article 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 orders that were randomly spread throughout the session. They were evaluated during two experimental sessions during which 20 electro-stimulations were sent. Twelve other subjects, added retrospectively, formed the control group (CG). These subjects participated in one session of the same experiment without any biofeedback.Three dependent variables were computed: (1) the ability of subjects to reach target posture (EG versus CG), (2) high pressure reductions after a biofeedback (EG versus CG) and (3) the level of these reductions relative to their initial values (EG only). Results show (1) that EG reached target postures in 90.2% of the trials, against 5,3% in the CG, (2) a significant reduction in overpressures in the EG compared to the CG and (3), for the EG, that the higher the initial pressures were, the more they were decreased. CONCLUSIONS/SIGNIFICANCE: The findings suggest that, in this trial, subjects were able to use a tongue tactile feedback system to reduce buttock overpressure while seated. Further evaluation of this system on paraplegic subjects remains to be done. Public Library of Science 2009-10-30 /pmc/articles/PMC2765637/ /pubmed/19888336 http://dx.doi.org/10.1371/journal.pone.0007550 Text en Chenu et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Chenu, Olivier
Vuillerme, Nicolas
Demongeot, Jacques
Payan, Yohan
A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study
title A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study
title_full A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study
title_fullStr A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study
title_full_unstemmed A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study
title_short A Wireless Lingual Feedback Device to Reduce Overpressures in Seated Posture: A Feasibility Study
title_sort wireless lingual feedback device to reduce overpressures in seated posture: a feasibility study
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2765637/
https://www.ncbi.nlm.nih.gov/pubmed/19888336
http://dx.doi.org/10.1371/journal.pone.0007550
work_keys_str_mv AT chenuolivier awirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT vuillermenicolas awirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT demongeotjacques awirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT payanyohan awirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT chenuolivier wirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT vuillermenicolas wirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT demongeotjacques wirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy
AT payanyohan wirelesslingualfeedbackdevicetoreduceoverpressuresinseatedpostureafeasibilitystudy