대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제17권1호
  • /
  • Pages.49-60
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  • 1996
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  • 1229-0807(pISSN)
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  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

정상유동에서 유동형 단엽폴리머 인공판막의 수력학적 성능평가

Hydrodynamic Investigation of a Floating-type Monoleaflet Polymer Valve under Steady Flow Condition

  • 김준우 (전북대학교 공과대학 기계공학부) ;
  • 박복춘 (전북대학교 공과대학 기계공학부, 서울대학교 의과대학 의공학과)
  • 발행 : 1996.03.01
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초록

An experimental investigation was performed under steady flow condition to assess hydrodynamic performance of floating-type monoleaflet polymer valves (MLPV) withdifferent leaflet thickness. The St. Jude Medical valve (SJMV) was also used for comparison test. Pressure drops of MLPVS are larger than those for other types of polymer valves and mechanical valves. Furthermore, the thicker is the leaflet thickness of the polymer valve, the larger are the corresponding pressure drop. The velocity profiles for MLPs reveal a large reversed flow region downward to the valve position. The maximum wall shear stresses of MLPVS at a flow rate of $30{\ell}$/min are in the range 50-130 dyn/$cm^2$, and the corresponding maximum Reynolds shear stresses are in the range of 100-500 dyn/$cm^2$, respectively, which are beyond the allowable limit clinically. In contrast, floating-type monoleaflet polymer valves show better hydrodynamic performance in leakage volume. From the designing point of view, it may be concluded that the optimum thickness of leaflet for better hydrodynamic performance is one of the Important parameters.

키워드

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