Document Detail

A system for monitoring heart pulse, respiration and posture in bed.
MedLine Citation:
PMID:  12085590     Owner:  NLM     Status:  MEDLINE    
A non-invasive system has been developed to monitor cardiac vibrations, respiration and posture of inbed hospitalized patients and elderly people who need constant care. These physiological variables are recorded by four 2 x 28 cm piezoelectric film acceleration sensors, eight 2 x 2 cm small pressure sensors and a 5 x 100 cm long pressure sensor. The piezoelectric sensors, attached to the chest over the heart during bed sleep or rest, detect the movements produced by the heartbeat and respiration. The eight small pressure sensors are attached at various positions on the upper and lower body. A longer pressure sensor, to detect the patient leaving the bed, is attached to the side of the bed. These sensor outputs are digitized at a sampling rate of 200 Hz using a 12-bit A/D converter and stored on a personal computer. The computer detects cardiac vibrations and respiration from upper chest movements and posture from the pressures recorded by small and long pressure sensors.
Yasuaki Miyamoto; Yoshiharu Yonezawa; Hiromichi Maki; Hidekuni Ogawa; Allen W Hahn; W Morton Caldwell
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biomedical sciences instrumentation     Volume:  38     ISSN:  0067-8856     ISO Abbreviation:  Biomed Sci Instrum     Publication Date:  2002  
Date Detail:
Created Date:  2002-06-27     Completed Date:  2002-11-06     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0140524     Medline TA:  Biomed Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  135-8     Citation Subset:  IM    
Department of Electronics, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan.
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MeSH Terms
Bed Rest
Equipment Design
Monitoring, Physiologic / instrumentation
Posture / physiology*
Pulse / instrumentation*
Respiratory Function Tests / instrumentation*

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