대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)
- 대한의용생체공학회 1994년도 춘계학술대회
- /
- Pages.105-108
- /
- 1994
혈전이 발생한 인공판막의 판막음 스펙트럼 분석
Sound Spectral Analysis of Valvular Clicks of Thrombosed Valve Prostheses
- 김상현 (연세대학교 심혈관연구소) ;
-
장병철
(연세대학교 흉부외과)
;
- 탁계래 (반데빌트대학교 의공학과) ;
- 허재만 (연세대학교 의용공학과) ;
-
김남현
(연세대학교 의용공학과)
;
- 강면식 (연세대학교 흉부외과) ;
-
조범구
(연세대학교 흉부외과)
- Kim, S.H. (Cardiovascular Research Institute, Yonsei University) ;
-
Chang, B.C.
(Dept. of Thorac. & Cardiovas. Surg., Yonsei University)
;
- Tack, G. (Dept. of Biomed. Eng., Vandervilt University) ;
- Huh, J.M. (Dept. of Biomed. Eng., Yonsei University) ;
-
Kim, N.H.
(Dept. of Biomed. Eng., Yonsei University)
;
- Kang, M.S. (Dept. of Thorac. & Cardiovas. Surg., Yonsei University) ;
-
Cho, B.K.
(Dept. of Thorac. & Cardiovas. Surg., Yonsei University)
- 발행 : 1994.05.13
초록
A comparative study was made of the valvular sounds produced by normal prosthetic valves with thrombosed prosthetic valves. Comparisons of the closing sound were made for the power frequency spectra associated with individual valves. We used periodogram approach to obtain the spectral characteristics of the valve. Spectral analysis system was tested in mock circulatory system by comparing normal valves with those produced by the same valves but having simulated thrombosis at the hinge of the valve. The heart sounds was recorded from two patients having normal mechanical valve and thrombosed mechanical valve. The estimated spectrum of the thrombosed mechanical valve displayed lower apparent peak frequency than that of the normal valve. The results showed that frequency spectra gave information pertinent to the valve malfunction. Sound spectral analysis is simple and alternative diagnostic tool for early detection of prosthetic valve mal function.
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