Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/109261
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Type: Journal article
Title: A battery-less and wireless wearable sensor system for identifying bed and chair exits in a pilot trial in hospitalized older people
Author: Shinmoto Torres, R.
Visvanathan, R.
Abbott, D.
Hill, K.
Ranasinghe, D.
Citation: PLoS ONE, 2017; 12(10):e0185670-1-e0185670-25
Publisher: Public Library of Science (PLoS)
Issue Date: 2017
ISSN: 1932-6203
1932-6203
Statement of
Responsibility: 
Roberto L. Shinmoto Torres, Renuka Visvanathan, Derek Abbott, Keith D. Hill, Damith C. Ranasinghe
Abstract: Falls in hospitals are common, therefore strategies to minimize the impact of these events in older patients and needs to be examined. In this pilot study, we investigate a movement monitoring sensor system for identifying bed and chair exits using a wireless wearable sensor worn by hospitalized older patients. We developed a movement monitoring sensor system that recognizes bed and chair exits. The system consists of a machine learning based activity classifier and a bed and chair exit recognition process based on an activity score function. Twenty-six patients, aged 71 to 93 years old, hospitalized in the Geriatric Evaluation and Management Unit participated in the supervised trials. They wore over their attire a battery-less, lightweight and wireless sensor and performed scripted activities such as getting off the bed and chair. We investigated the system performance in recognizing bed and chair exits in hospital rooms where RFID antennas and readers were in place. The system's acceptability was measured using two surveys with 0-10 likert scales. The first survey measured the change in user perception of the system before and after a trial; the second survey, conducted only at the end of each trial, measured user acceptance of the system based on a multifactor sensor acceptance model. The performance of the system indicated an overall recall of 81.4%, precision of 66.8% and F-score of 72.4% for joint bed and chair exit recognition. Patients demonstrated improved perception of the system after use with overall score change from 7.8 to 9.0 and high acceptance of the system with score ≥ 6.7 for all acceptance factors. The present pilot study suggests the use of wireless wearable sensors is feasible for detecting bed and chair exits in a hospital environment.
Keywords: Monitoring, Physiologic
Description: Published: October 9, 2017
Rights: Copyright: © 2017 Shinmoto Torres et al. 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 credited.
RMID: 0030076473
DOI: 10.1371/journal.pone.0185670
Grant ID: http://purl.org/au-research/grants/arc/DP130104614
Appears in Collections:Medicine publications

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