융합신호처리학회논문지 (Journal of the Institute of Convergence Signal Processing)

한국융합신호처리학회 (The Korea Institute of Convergence Signal Processing)
권호 표지

심전도와 심탄도의 무구속적 동시 측정을 위한 의자 등받이 개발

Development of Chair Backrest for Non-intrusive Simultaneous Measurement of ECG and BCG

  • 임용규 (상지대학교 한방의료공학과)
  • Lim, Yong-Gyu (Department of Oriental Biomedical Engineering, Sangji University)
  • 투고 : 2018.08.23
  • 심사 : 2018.09.28
  • 발행 : 2018.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

심전도와 심탄도를 무구속적으로 동시에 측정하는 시스템을 개발하였다. 제안된 시스템은 의자의 보조 등받이에 설치되어 맥파전달시간(PAT), Pre-ejection period (PEP) 등의 심혈관계 역학 정보를 일상생활에서 무구속적으로 측정하는 것을 목적으로 개발되었다. 본 연구에서는, 의자의 등받이에 부착된 용량성 능동전극과 용량성 접지를 이용한 간접접촉 심전도 (IDC-ECG) 측정 방법에 의해 무구속적으로 심전도를 측정하였으며, 등받이에 부착된 EMFi 압력 센서를 사용하여 무구속적으로 심탄도(ballistocardiogram)를 측정하였다. 제안된 시스템으로 심전도와 심탄도가 무구속적으로 동시에 측정됨을 확인하였으며, 측정된 심탄도는 피검자 사이에서 일정한 패턴을 보이는 것을 알 수 있었다. 또한 심전도의 Q파와 심탄도의 첫 번째 첨두간의 시간차가 pre-ejection period와 높은 상관관계를 보이는 것도 확인할 수 있었다. 이 연구에서 개발된 시스템은 심혈관계의 다양한 지표(심전도, 심박수, PAT, PEP 등)를 무구속적으로 일상생활에서 측정할 수 있음을 보였다.

A non-intrusive ECG and BCG measurement system is introduced. The system is built on a auxiliary backrest of a chair. The developed system is aimed to non-intrusive assessment of cardiovascular dynamic indices such as pulse arrival time(PAT) and pre-ejection period (PEP). In the system, capacitive active electrodes and capacitive grounding were used for the non-intrusive indirect-contact ECG measurement, and EMFi pressure sensor was used for the non-intrusive BCG measurement. The capacitive active electrodes and the EMFi sensor were attached on the backrest. Using the system, ECG and BCG were successfully acquired. The measured BCG showed peaks that following ECG R peaks. It was shown that the time interval between Q wave in ECG and first peak in BCG correlates Pre-ejection period measured by impedance-cardiogram. The results showed that the introduced system can be used for the non-intrusive various cardiovascular information including ECG, PAT, PEP.

키워드

참고문헌

  1. F. S. Cattivelli, "Noninvasive Cuffless Estimation of Blood Pressure from Pulse Arrival Time and Heart Rate with Adaptive Calibration," Sixth International Workshop on Wearable and Implantable Body Sensor Networks 2009, pp 2657-64.
  2. J. C. Kubitz, G. I. Kemming, G. Schultheib, J. Starke, A. Podtschaske, A. E. Goetz, and D. A. Reuter, "The influence of cardiac preload and positive end-expiratory pressure on the pre-ejection period," Physiol Meas, vol. 26, pp. 1033-8, 2005. https://doi.org/10.1088/0967-3334/26/6/012
  3. H. Schachinger, M. Weinbacher, A. Kiss, R. Ritz, and W.Langewitz, "Cardiovascular indices of peripheral and central sympathetic activation," Psychosom Med, vol. 63, pp. 788-96, 2001. https://doi.org/10.1097/00006842-200109000-00012
  4. E. Pinheiro, O. Postolache, and P. Girao, "Theory and Developments in an Unobtrusive Cardiovascular System Representation: Ballistocardiography," Open Biomed Eng J, vol 4, pp 201-216, 2010. https://doi.org/10.2174/1874120701004010201
  5. C. S. Kim, et al. "Ballistocardiogram as Proximal Timing Reference for Pulse Transit Time Measurement: Potential for Cuffless Blood Pressure Monitoring," IEEE Trans Biomedical Eng, vol 62, pp. 2657-64, 2015. https://doi.org/10.1109/TBME.2015.2440291
  6. Y. G. Lim, K. K. Kim, and K. S. Park, "ECG measurement on a chair without conductive contact," IEEE Trans. Biomedical Engineering, vol. 53, no. 5, pp. 956-959, 2006. https://doi.org/10.1109/TBME.2006.872823
  7. Y. G. Lim, "A Study on Intrinsic Noise of Capacitively Coupled Active Electrode," J. of The Institute of Signal Processing and Systems, vol. 13, no. 1, pp. 44-49, 2012.
  8. S. S. Ahmed, G. E. Levinson, C. J. Schwartz, and P. O. Ettinger, "Systolic time intervals as measures of the contractile state of the left ventricular myocardium in man," Circulation, vol. 46, pp. 559-71, 1972. https://doi.org/10.1161/01.CIR.46.3.559
  9. J. H. Kim, Y. H. Jeong, "Implementation of Real-time Heart Activity Monitoring System Using Heart Sound," Journal of the Institute of Convergence Signal Processing, vol.19, no.1, pp. 14-19, 2018.
  10. Z. Lababidi, D. A. Ehmke, R. E. Durnin, P. E. Leaverton, and R. M. Lauer, "The first derivative thoracic impedance cardiogram," Circulation, vol. 41, pp. 651-8, 1970. https://doi.org/10.1161/01.CIR.41.4.651