대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)

대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

전기회로 모델을 이용한 동맥 협착 후부의 소지맥 현상 해석

What causes the Pulsus - Tardus and Parvus effect at the Arterial Post-stenosis region?

  • 김수정 (서울대학교 대학원 협동과정 의용생체공학 ) ;
  • 이동혁 (서울대학교 대학원 협동과정 의용생체공학 ) ;
  • 김종효 (서울대학교 의과대학 방사선과학 교실) ;
  • 박재형 (서울대학교 의과대학 방사선과학 교실) ;
  • 민병구 (서울대학교 대학원 협동과정 의용생체공학 )
  • Kim, S.J. (Department of Biomedical Engineering, College of Engineering, Seoul National University) ;
  • Lee, D.H. (Department of Biomedical Engineering, College of Engineering, Seoul National University) ;
  • Kim, J.H. (Department of Radiology, College of Medicine, Seoul National University) ;
  • Park, J.H. (Department of Radiology, College of Medicine, Seoul National University) ;
  • Min, B.G. (Department of Biomedical Engineering, College of Engineering, Seoul National University)
  • 발행 : 1997.11.28
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초록

Recently, many studies have shown clinically the detection of proximal arterial stenosis through evaluation of a Doppler waveform alternation, the so-called pulsus tardus and parvus, that often occurs distal to the stenosis. However the cause of the tardus-parvus phenomenon remains obscure. To analyze its cause, we modeled the blood-flow circuit as simple electrical circuit. This shows that pulsus tardus-parvus effect is caused as a result of high-frequency waveform component attenuation from low-pass filtering by capacitance(complience of the poststenotic vessel wall) and resistance(stenosis). As a result, the degree of pulsus tardus-parvus increased as the complience of the poststenotic segment of vessel increased, as well as increasing stenosis.

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