The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Development of Wireless Respiratory Air Flow and Urinary Flow Measurement System for Home Healthcare

가정용 무선 호흡기류 및 요속신호 계측 시스템 개발

  • 차은종 (충북대학교 의과대학 의학과) ;
  • 이인광 (충북대학교병원 의료기기임상시험센터) ;
  • 이유미 (충북대학교 의용생체공학과) ;
  • 한순화 (충북대학교 의용생체공학과) ;
  • 한정수 (충북대학교 의용생체공학과) ;
  • 서재원 (충북대학교 전자정보대학) ;
  • 박찬식 (충북대학교 전자공학부) ;
  • 김경아 (충북대학교 의과대학 의학과)
  • Received : 2012.04.21
  • Accepted : 2012.07.12
  • Published : 2012.09.01
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Abstract

Medical system for personal health management recently changes its paradigm from hospital service to self home care based on ubiquitous technology for healthcare anywhere at any time. The present study developed a wireless bio-signal measurement system for patients to self manage pulmonary disease and benign prostate hyperplasia(BPH), both of which are chronic diseases with increasing frequency in modern society. Velocity-type respiratory air flow transducer adapted to develop respiratory module for pulmonary disease management was simplified in structure to measure uni-directional flow since most important diagnostic parameters are evaluated on the expiratory flow signal only. Standard weight measurement technique was introduced to obtain urinary flow signal for BPH management. Three load cell signals were acquired for averaging to minimize noise, followed by accuracy evaluation. Transmission and receiver modules were also developed with user program for wireless communication. Averaged relative errors were 2.05 and 1.02% for respiratory volume and maximal flow rate, respectively, and the relative error was 2.17% for urinary volume, demonstrating that both modules enabled very accurate measurements. Wireless communication distance was verified within 15m, long enough for home care application. The present system allows the user to select a necessary measurement module on a particular health demand and to immediately provide the self-test results, thus better quality health care would be possible.

Keywords

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