Document Detail

A microcomputer-based respiratory and activity recording system.
MedLine Citation:
PMID:  12085587     Owner:  NLM     Status:  MEDLINE    
A respiratory and activity recording system has been developed for monitoring health conditions and living patterns, such as activity/rest time periods and general activity level. The system employs a piezoelectric sensor, a low-power operational amplifier, a low-power 8-bit microcomputer and a 512 KB EEPROM. The piezoelectric sensor, whose electrical polarization voltage is produced by mechanical strain, records body movements produced by respiration, heart pulse, walking and running. The high and low frequency components from the recorded body movements are discriminated by high and low pass filters. The high frequency components reflect the body movements produced by cardiac vibrations, walking and running activities. The low frequency components are mainly generated by respiration. The degree of activity is obtained by summing the high frequency components for 1 second. The microcomputer stores the obtained low frequency components and activity to the EEPROM at 0.2 second and 1 second intervals, respectively. After recording, these stored data are downloaded to a desktop computer. The computer then detects behavior patterns from the activity data and respiration from the low frequency components.
Shingo Matsuoka; Yoshiharu Yonezawa; Hiromichi Maki; Hidekuni Ogawa; Allen W Hahn; W Morton Caldwell
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
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:  119-22     Citation Subset:  IM    
Department of Electronics, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan.
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MeSH Terms
Diagnosis, Computer-Assisted*
Equipment Design
Respiratory Function Tests / instrumentation*
Sleep / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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