지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Assuming that photons absorbed by a vessel do not have acute variations, DC component reflect the basal blood volume (or diameter) before blood pulsation. Vascular stiffness and reflection is influenced by changes in basal blood volume (or diameter). This paper describes analysis of the characteristic variations of vascular stiffness, according to relative variations in DC components of the PPG signal (25-75%). For quantitative analysis, we have used parameters that were proposed previously, reflection and stiffness index, and the second derivative of PPG waveform, b/a and d/a. Significantly, the vascular stiffness and reflections were increased according to increase in DC component of the PPG signal for more than about 3% of baseline values. The systolic blood pressure were increased from 113.1 ± 13.18 to 116.2 ± 13.319 mmHg, about 2.76% (r = 0.991, p < 0.001) and the AC component of the PPG signal were decreased from 2.073 ± 2.287 to 1.973 ± 2.203 arbitrary unit, about 5.09% (r = −0.993, p < 0.001). It is separated by DC median and correlation analysis was performed for analyzing vascular characteristics according to instantaneous DC variations.
There are significant differences between two correlation coefficients in separated data.
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참고문헌 (24)
참고문헌 신청
B. M. Pannier / 2002 / Methods and devices for measuring arterial compliance in humans / Am J Hypertens 15 : 743 ~ 753
C. H. Chen / 1997 / Estimation of central aortic pressure waveform by mathematical transformation of radial tonometry pressure. Validation of generalized transfer function /
C. Z. Wang / 2010 / Comparison between reflection- mode photoplethysmography and arterial diameter change detected by ultrasound at the region of radial artery / Blood Press
D. Chemla / 2008 / Noninvasive assessment of arterial pressure / Curr Opin Crit Care 14 : 317 ~ 321
D. H. Bergel / 1961 / The static elastic properties of the arterial wall / J Physiol 156 : 445 ~ 457
C. H. Chen / 1997 / Estimation of central aortic pressure waveform by mathematical transformation of radial tonometry pressure. Validation of generalized transfer function /
C. Z. Wang / 2010 / Comparison between reflection- mode photoplethysmography and arterial diameter change detected by ultrasound at the region of radial artery / Blood Press
D. Chemla / 2008 / Noninvasive assessment of arterial pressure / Curr Opin Crit Care 14 : 317 ~ 321
D. H. Bergel / 1961 / The static elastic properties of the arterial wall / J Physiol 156 : 445 ~ 457
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