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Non-contact respiratory monitoring system using a ceiling-attached microwave antenna

Non-contact respiratory monitoring system using a ceiling-attached microwave antenna Using a microwave antenna attached to the room ceiling, we conducted non-contact monitoring of respiratory chest wall motions of subjects in bed and covered by a soft comfortable bedding, to measure the vital signs of patients under nursing care in a welfare institution. Long-term vital sign monitoring using electrodes places a heavy burden on monitored individuals. Our non-contact respiratory monitoring system comprises a 1,215 MHz-microwave radar (LDR-1), antenna box attached to the ceiling, and personal computer with analyzing software. The system was tested on eight healthy volunteers (mean age, 25 years; range, 21–44 years) and eight elderly volunteers with some disorders (mean age, 69 years; range, 66–75 years). Respiratory rates of subjects measured using this system correlated with rates measured using respiration sensors (r = 0.97, P < 0.001 for healthy volunteers, r = 0.98, P < 0.0001 for elderly volunteers). The system could monitor subtle changes in respiratory rate, and monitoring respiratory rate increases caused by disorders such as pneumonia will be possible. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Medical & Biological Engineering & Computing Springer Journals

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References (11)

Publisher
Springer Journals
Copyright
Copyright © 2006 by International Federation for Medical and Biological Engineering
Subject
Engineering; Computer Applications ; Imaging / Radiology; Human Physiology ; Biomedical Engineering
ISSN
0140-0118
eISSN
1741-0444
DOI
10.1007/s11517-006-0091-8
pmid
16941101
Publisher site
See Article on Publisher Site

Abstract

Using a microwave antenna attached to the room ceiling, we conducted non-contact monitoring of respiratory chest wall motions of subjects in bed and covered by a soft comfortable bedding, to measure the vital signs of patients under nursing care in a welfare institution. Long-term vital sign monitoring using electrodes places a heavy burden on monitored individuals. Our non-contact respiratory monitoring system comprises a 1,215 MHz-microwave radar (LDR-1), antenna box attached to the ceiling, and personal computer with analyzing software. The system was tested on eight healthy volunteers (mean age, 25 years; range, 21–44 years) and eight elderly volunteers with some disorders (mean age, 69 years; range, 66–75 years). Respiratory rates of subjects measured using this system correlated with rates measured using respiration sensors (r = 0.97, P < 0.001 for healthy volunteers, r = 0.98, P < 0.0001 for elderly volunteers). The system could monitor subtle changes in respiratory rate, and monitoring respiratory rate increases caused by disorders such as pneumonia will be possible.

Journal

Medical & Biological Engineering & ComputingSpringer Journals

Published: Aug 29, 2006

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