• Title/Summary/Keyword: radial artery pulse

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Precise Measurement Method of Radial Artery Pulse Waveform using Robotic Applanation Tonometry Sensor (로보틱 토노메트리 센서를 이용한 요골 동맥 파형 정밀 측정 방법)

  • Kim, Young-Min
    • Journal of Sensor Science and Technology
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    • v.26 no.2
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    • pp.135-140
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    • 2017
  • In this paper, a novel measurement method of radial artery pulse waveform using robotic applanation tonometry (RAT) was present to reduce the errors by the pressing direction of the vessel. The RAT consisted of an array of pressure sensors and 2-axis tilt sensor, which was attached to the universal joint with a linear spring and five-DOF robotic manipulator with a one-axis force sensor. Using the RAT mechanism, the pulse sensor could be manipulated to perpendicularly pressurize the radial artery. A pilot experimental result showed that the proposed mechanism could find the optimal pressurization angles of the pulse sensor within ${\pm}3^{\circ}$standard deviations. Coefficient values of variation of maximum pulse peaks extracted from the pulse waveforms were 4.692, 6.994, and 11.039 % for three channels with the highest magnitudes. It is expected that the proposed method can be helpful to develop more precise tonometry system measuring the pulse waveform on the radial artery.

Multi-Point Radial Artery Pulse Wave Transducer using Pneumatic System (공압 방식에 의한 다지점 요골 맥파 검출 장치)

  • 이종진;정민석;황성하;이종현;이선규
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.243-248
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    • 2001
  • A radial artery pulse wave is well known as a good mans to diagnose human body condition in th field of Chinese medical science. Information about constitution as well as organs can be obtained by detecting the artery pulse wave. Recently, the information about the human body constitution may be utilized in accelerating the recovery process of the patient on the basis of comprehensive diagnosis. A radial artery pulse wave is considered as one of promising means in examining the human body constitution. Since the examination has been conducted by the feeling of finger, the diagnosis may occasionally have uncertainty or fatal error. In this paper, a new measuring system is suggested and developed to examine the pattern of a pulse wave correctly. The system is composed of four pressure vessels, pressure sensors and air supplying pumps. One of them is utilized for appropriately pressing the radial artery, three of them for detecting pressure change in several mmHg level. The detected data is shown and discussed.

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A Study of PPG Wave and Pulse Measurement on Radial Artery Using Digital Potentiometer and Exponentially Weighted Moving Average Filter (디지털 가변저항과 지수가중 이동평균필터를 통한 요골동맥에서의 PPG 파형과 맥박 측정에 관한 연구)

  • Jung, In-Bok;Kim, Kyung-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.7
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    • pp.962-967
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    • 2014
  • In this paper, through a digital potentiometer and exponentially weighted moving average filter, pulse and PPG waveform measurable device was fabricated in radial artery. If this device is not proper about signal size in analog part, MCU can judge easily by adjusted amplification through digital potentiometer, using exponentially weighted moving average filter is able to filter out more clear value of ADC. I presumed pulse rate as value of measuring time between point of maximum contraction from sensing signal in radial artery of wrist. Therefore, this means can measure stable pulse rate and PPG waveform, finger as well as radial artery, whether signal size of each person is different finger as well as radial artery.

Development of an Measuring System for Pulse Wave Corresponding to Different Radial Artery Diameters Caused by Indentation (요골동맥 직경 변화에 따른 맥파 측정 시스템 개발)

  • Lee, Jeon;Woo, Young-Jae;Jeon, Young-Ju;Lee, Yu-Jung;Kim, Jong-Yeol
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.12
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    • pp.2351-2357
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    • 2008
  • Noninvasive radial artery pulse wave has been widely used not only for the pulse wave analysis(PWA) itself but also for assessment of arterial stiffness with estimated aortic pulse wave from peripheral pulse wave. However, it has been found that the deformation of pulse shape can be caused readily by changing measuring position, indentation pressure, and so on. So, in this study, we have developed a system which can measure radial pulse wave and skin displacement simultaneously while the indentation body goes down to occlude subject's radial artery. This system can be divided into a measuring apparatus part, an indentation control hardware part, a data acquisition part and a control and computation part. And, the measuring apparatus consists of an arm-rest, a step motor, an indentation body, a laser displacement sensor(LK-G30, Keyence Co.) and pulse wave sensor. Under load-free condition and radial artery loaded condition, the evaluation of developed system has been performed. From these results, we can conclude: 1) The developed system can control the indentation body quantitatively and the adopted laser displacement sensor shows linear output characteristic even with skin as a reflector. 2) This system can measure the pulse wave and the displacement of indentation body, that is, skin displacement simultaneously at each specific level of indentation body. 3) This system can provide the number of motor steps used to get down the indentation body, the measured skin displacement, the calculated indentation pressure, the calculated pulse pressure and the pulse waveform as well as the information generated by combining these with each others. 4) This system can reveal the relationship between the morphological changes of pulse wave and the estimated displacement of radial artery wall by indentation. Consequently, the developed system can furnish more abundant information on radial artery than previous diagnosis systems based on tonometric measurement. In further study, we expect to setup the standard measuring process and to concrete the algorithm for the estimation of radial artery's diameter and of displacement of radial artery's wall. Furthermore, with well designed clinical studies, we hope to turn out the usefulness of developed system in the field of cardiovascular system evaluation.

A Research of characteristics of left/right pulse wave and blood vessel using Korean medicine pulse diagnosis (맥진기를 이용한 좌우 맥파 및 혈관 특성 연구)

  • Kang, JinHo;Lee, Han-Byul;Kim, Ki-Wang;Kwon, Jung-Nam;Lee, Byung-Ryul
    • The Journal of Korean Medicine
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    • v.35 no.3
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    • pp.155-165
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    • 2014
  • Objectives: The pulse diagnosis to identify the symptoms has been considered important in Korean medicine. The position and character of disease would be confirmed by pulse diagnosis of left and right radial artery. This paper is to analyze the characteristics and differences of left and right blood vessels. Methods: In this study, left and right radial artery and dorsalis pedis artery was measured and analyzed by using condenser typed pulse analyzer. Commercially available pulse analyzer was used to measure the radial artery. The pulse wave was measured in 20 laboratory healthy men and women. The blood vessel aging degree and index of augmentation of blood vessel was obtained from the measured pulse wave graph and the characteristics and differences of the left and right blood vessel was analyzed. Results: The significant difference of pulse transit time between the right handed and non-right handed was not found. The correlation of radial artery and dorsalis pedis artery had no significant difference. By obtaining the blood vessel aging index (AGI) and augmentation index (AI) of blood vessel at the left and right radial artery, the significant difference between right handed and non-right handed was not found. Conclusions: The result of this study would help to explain the characteristic of blood vessel with respect to the left and right handed. We suggest that research of pulse wave of the left and right blood vessel using pulse analyzer should be needed in further study.

Study on the Waveform Analysis of Radial Artery Pulse Diagnosis Using Pulse Meter and Analyzer - the Waveform Analysis of Left KWAN Pulse Dignosis - (맥상기를 통한 요골동맥 맥진법의 맥파분석 - 좌관부위 맥파요인을 중심으로 -)

  • Kim, Gyeong-Cheal;Lee, Jeong-Won;Ryu, Kyeong-Ho;Park, Dong-Il;Shin, Woo-Jin;Kang, Hee-Jung
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.23 no.1
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    • pp.186-191
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    • 2009
  • In the study on the waveform analysis of radial artery pulse diagnosis, we need to establish fundaments of contemporary pulse diagnosis research. As we will to do experimental research on the difference of pulse waveform on the radial artery with applied variations of pressure(5 stage-pressure) and measuring position(CHON, KWAN, CHEOG). First of all, in this research, we did the experiment of the study on the waveform analysis of radial artery(left KWAN) pulse dignosis by using 3 dimension pulse meter and analyzer (3D MAC). As a result. we extracted the seven measurement fluents : energy(E), size of cycle(h1), size of reflection cycle(h2), time of reflection cycle(t2), time of contraction (t4), width of cycle(w), area of waveform(A) by the statistically reasonable differences. We expect that the seven measurement fluents contribute to divide the situation through the results of waveform analysis of radial artery.

Analysis of Pulse Waveform and Pulse Wave Velocity of Carotid Artery and Radial Artery by Using Clip-type Pulsimeter Equipped with Permanent and Hall Device (영구자석과 홀소자가 구비된 맥진기를 이용한 경동맥과 요골동맥의 맥진파형과 맥파전달속도 분석)

  • Kim, Dong-Young;Lee, Sang-Suk;Hyeon, Seog-San;Rhee, Jin-Kyu
    • Journal of the Korean Magnetics Society
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    • v.24 no.5
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    • pp.146-151
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    • 2014
  • The pulse waveforms of a carotid artery in the neck and a radial artery in the hand wrist were individually measured by using clip-type pulsimeter equipped with a permanent and Hall device. The pulse transit time and the pulse wave velocity obtained through comparison of two pulse waveforms were analyzed each other. A value of the pulse wave velocity was about 8.5 m/s similar to one measured by a conservative method. This result suggests that the clip-type pulsimeter as the reproducible and reliable one oriental diagnostic medical device can be predicted to any atherosclerosis state in the cardiac circulatory system.

Detection of Radial Pulse Wave by Photoplethysmogram (광전용적맥파를 이용한 요골동맥 맥파 검출)

  • 정동근;김광년;연규선;최병철;서덕준
    • Journal of Life Science
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    • v.13 no.1
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    • pp.42-46
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    • 2003
  • Photoplethysmogram is widely used to measure heart rate and arterial blood oxygen saturation in human. This paper describes radial pulse waves recorded by photoplethysmogram with 940 nm wavelength infra red light. Radial pulse waves were varied according to the recording site. When recorded on the skin over radial artery, the radial pulse wave was inverted, comparing to the photoplethysmogram at fingertip. The mechanism of inverted pulse wave seemed to be caused by the change of the blood volume in the subcutaneous tissue between radial artery and the skin, which was reduced during systolic period and increased during diastolic period of the cardiac cycle. These results suggest that radial arterial wall may reflect infra red ray.

Characteristics of Pulse Wave Velocity by the Simultaneously Measured ECG Waveform and Hall Device Radial Artery Waveform (ECG 파형과 홀소자 맥진파형으로 동시 측정한 맥파전달속도 특성 연구)

  • Yoo, Jae-Young;Choi, Suel-Gi;Kim, Dam-Bee;Lee, Sang-Suk
    • Journal of the Korean Magnetics Society
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    • v.22 no.4
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    • pp.136-141
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    • 2012
  • In the this research, two simultaneous peaks of radial artery pulse wave and ECG pulse wave measured by using clip-type pulsimeter and ECG were investigated in order to analyze pulse wave velocity. The measured value of a pulse wave velocity is about 5~7 m/s, it is proved one new method to measure an exact value of pulse wave velocity more than the typical biomedical signal monitoring system. This result implies that data measured by the oriental medical diagnosis apparatus as pulsimeter is clinically used in future.