Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Miniaturization of disposable functional flow tube

기능성 일회용 호흡관의 소형화 연구

  • Kim, Kyung-Ah (Biomedical Engineering Department, School of Medicine, Chungbuk National University) ;
  • Lee, Tae-Soo (Biomedical Engineering Department, School of Medicine, Chungbuk National University) ;
  • Cha, Eun-Jong (Biomedical Engineering Department, School of Medicine, Chungbuk National University)
  • 김경아 (충북대학교 의과대학 의공학교실) ;
  • 이태수 (충북대학교 의과대학 의공학교실) ;
  • 차은종 (충북대학교 의과대학 의공학교실)
  • Published : 2005.07.30
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Abstract

Respiratory tubes with the length of 35 mm and the diameter of 10, 15, and 20 mm were made and both the static($P_{S}$) and dynamic($P_{D}$) pressures were measured for steady flow rates ranging 1-12 l/sec. Regression analysis resulted successful fitting of $P_{S}$ and $P_{D}$ data with quadratic equations with correlation coefficients higher than 0.99. The measurement standards of the American Thoracic Society (ATS) were applied to $P_{S}$ data, which demonstrated the smallest tube diameter of 15 mm to satisfy the ATS standards. The maximum $P_{D}$ value of the velocity type transducer with the diameter of 15 mm was estimated to be 75 cm$H_{2}O$, implying approximately 7 times larger sensitivity than the widely used pneumotachometer. These results showed that the velocity type respiratory air flow transducer is a unique device accomplishing miniaturization with the sensitivity increased, thus would be of great advantage to develop portable devices.

Keywords

References

  1. 차은종, '호흡기 시스템의 측정', In: 의용계측공학, 의공학 교육연구회 역편, 여문각, pp. 509-598, 1993
  2. A. Fleisch, 'Der pneumotachography: ein Apparatzur beischwindgkeitregstrierung der atemluft', Arch. Ges. Physiol. vol. 209, pp. 713-722, 1925 https://doi.org/10.1007/BF01730956
  3. Micro Medical Ltd., 'Microlab operating manual', pp. 2-4, 1998
  4. 김경아, 김현식, 이태수, 차은종, '호흡기류계측을 위한 기류속도 샘플링 기법', 제24회 대한의용생체 공학회 춘계학술대회, p. 77, 2001
  5. 김경아, 김현식, 이태수, 차은종, '호흡기류를 동압력으로 변환하는 기능성 일회용 호흡관의 개발', 센서 학회지, 제11권, 제3호, pp. 125-131, 2002
  6. A. Greening, 'General principles', In: manual of asthma management, pp. 331-337, Ed. by P. M. O'byme, N. C. Thomson, W. B. Saunders, New York, 2001
  7. S. Bellofatto, 'Portable peak flow meter', U. S. patent no. 5, 224, 487, 1993
  8. R. M. Olson, 'Flow measurements', In: Essentials of engineering fluid mechanics. 4th. ed. pp. 452482, Maple Press Company, Ohio University, 1980
  9. American Thoracic Society, 'Standardization of spirometry', Am. J. Respir. Crit. Care Med. vol. 152, pp. 1107-1136, 1995 https://doi.org/10.1164/ajrccm.152.3.7663792
  10. K. A. Rudolph, 'Pneumotach', U. S. Patent no. 5, 060, 655, 1991
  11. M. Eloranta, 'Flow resistance of air flow transducer', PCT, W099/60343, 1999
  12. R. E. Hyatt, 'Expiratory flow limitation', J. Appl. Physiol. vol. 55, pp. 1-8, 1983
  13. 김경아, 이재헌, 김군진, 이태수, 차은종, '소형 공기챔버를 센서소자로 사용하는 새로운 호식기류 계측 기술', 센서학회지, 제 13권, 제2호, pp. 79-84, 2004