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최재훈(Jaehun Choe),이도연(Doyeon Lee),김준영(Joonyeong Kim),최성욱(Sung Wook Choi),하호진(Hojin Ha) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Accurate reproduction of the physiological blood flow is important for understanding hemodynamics and its relation to the cardiovascular disease. In this study, we developed a pulsatile pump system using a gear pump and a servo motor. The desired flow waveform was given by a text format. It was later converted to the analog voltage and given to the servo motor controller. The produced flow rate was measured using a orifice-type of flow meter, which calibrated at steady flow conditions from 0 to 20 L/min. The results show that the pulsatile pump system reproduced the desired flow waveform up to 20 L/min.
PPG신호를 이용한 반지형 동맥혈압 측정 방법에 관한 연구
김정훈(Jung-hoon Kim),이정완(Jeong-wan Lee),최성욱(Sung-wook Choe) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
While the convenient method for measuring blood pressure had been being researched, without delay and painless blood pressure(BP) measurements have been demanded for the patients who are requested to measure blood pressure regularly. For that reason, a lot of noninvasive blood pressure measurements have been developed and used. However, there are some undesirable characteristics to use noninvasive BP measurements for serious patients. The patients in need of intensive care are required to measure blood pressure continuously and exactly. But not only noninvasive blood pressure measurements are not continuous but also not enough to estimate blood pressure for certain patients. Therefore invasive blood pressure measurements are inevitably using in operating room or intensive care unit. Still, invasive blood pressure measurements have also some problems of infection and bleeding. As a result, novel method for measuring blood pressure is strongly recommended to be developed. The Purpose of this paper is for evaluating new method for measuring blood pressure that has been conducted by PPG. In order to apply this method to the patients, we suggest ring type measurement using PPG and existing method for noninvasive blood pressure measurement that compensates error.