• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.407-408
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• 2008

한의학 관점의 진맥위치는 요골동맥상의 촌/관/척 세부위로 나누어진다. 거의 말초에 해당하는 근접한 부위를 세 부분으로 나누어 진맥하여 병을 진단하는데 촌/관/척 위치에 대한 해부학적 혈류역학적 근거는 부족한 상황이다. 본 논문에서는 초음파(VOLUSION730 PRO, GE Medical 미국)를 이용하여 맥진 위치의 혈관굵기, 혈관깊이 그리고 혈류 속도를 측정하고 분석해 봄으로써 맥진 위치의 구조석 차이를 이해해 보고자 한다. 또한 Body Mass Index(BMI)에 따라 혈관의 특성이 달라지는지 파악하고 한의맥진과의 상관관계를 분석해 보았다. 심혈관 질환이 없는 남자 피험자를 각각 BMI 정상인 그룹, 저체중 그룹, 과체중 그룹으로 나누어 5명씩 측정하였다. 좌, 우 손목의 맥진위치(촌, 곽, 척)에서 혈관깊이, 혈관굵기, 혈류속도를 측정하였으며 맥진기(3-D Mac, 대요메디, 한국)를 이용하여 맥파를 측정하였다. 그 결과, 비만도에 따라 혈관의 특징이 다르게 나타남을 알 수 있었으며 한의 맥의 종류 중 부맥과 치맥에 특징이 비만도와 관련 있음을 알 수 있었나 이는 피험자의 혈관 특성과 BMI 정보가 진단에 중요한 지표이며 자동 맥진 알고리즘 개발 시 반드시 고려해야 하는 사항임을 알 수 있다.

• The Journal of Korean Medicine
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• v.31 no.4
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• pp.178-186
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• 2010

Objectives: This study was to investigate the effect of moxibustion on peripheral blood flow by Doppler ultrasound in post-stroke hemiplegia patients. Methods: Moxibustion was applied on the points of LI4, TE3, TE5 and LI11 on the affected side, and blood flow of the radial artery was measured using the Minimax-Doppler-K device. Blood flow velocity and pulsation index were analyzed before, during, and after moxibustion. Results: The mean value of blood flow velocity in 13 patients showed a tendency of increase during moxibustion, but there was no significant difference in blood flow velocity before and after moxibustion, or pulsation index during and after moxibustion. In addition, among the five patients who showed marked increase tendency on the blood velocity graph, there was significant increase in blood velocity during, and after moxibustion compared with before moxibustion. Conclusions: This study suggests that moxibustion has an effect on peripheral blood flow in stroke patients with hemiplegia. Further validity tests with a larger scale sample are needed for the evidence of its practical use.

• Journal of the Korean Magnetics Society
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• v.21 no.3
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• pp.104-107
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• 2011

We measured signals at the "Guan" region of a radially arterial pulse using the prototype of a clamping pulsimeter equipped with a Hall effect device, which is passed signals through the voltage detecting hard ware system. The important four different measuring times of the period, systolic, reflective, and notch peaks for a temporally pulse signal are obtained and compared each other from the analysis for an arbitrary pulse wave of one position of small size permanent magnet. It is possible to measure the reproducible pulse rate and blood pressure by using the cuffless clip type pulsimeter without an unpleasant oppressive feeling due to the use of pressurization.

• Archives of Reconstructive Microsurgery
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• v.15 no.1
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• pp.38-41
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• 2006

A 57-year-old male suffered from tingling and paraesthesia on radial side of right hand. We carried out exploration, the process being done, a radial artery passing between the two branches of bifurcated superficial radial nerve was found by accident. Then we performed dissection of the radial artrery a little more distally. It was passing above the extensors of thumb to anstomical snuff box. We treated it with ligating the radial artery, which was done a little above the bifurcated site of superficial radial nerve after angiography of upper extremity. While we were following this procedure, we noticed that symptoms had improved a lot. To our knowlege, neuropathy, by itself of superficial radial nerve by the radial artery with anatomical variation has never been reported and therefore we report this case.

• Journal of the Korean Magnetics Society
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• v.22 no.1
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• pp.27-31
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• 2012

Two radially arterial pulses of both hands using the prototype of a clamping clip pulsimeter equipped with permanent magnet and Hall device are compared and analyzed. The phase difference of two pulse wave signals is dominantly presented from the simultaneous measuring clinical pulse wave signals for twenty two male participants at their 20's. It is possible to analyze that the fast and slow pulse wave for right hand and left hand depend on the muscle property of arms rather than the total length of blood vessel due to cardiovascular circulatory system.

• Journal of the Korean Magnetics Society
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• v.24 no.3
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• pp.90-96
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• 2014

The magnetic field variation by the permanent magnet fluctuation positioned on a "Chwan" of wrist according to the movement of radial artery was generated. The clip-type pulsimeter equipped with a Hall device sensing magnetic field pulse movement analyzed the characteristics of pulse wave as output signals. The magnetic field curve and pulse waveform simulated by the finite element method were compared and analyzed with each other. Also, the variation of magnetic field distribution one permanent magnet investigated by the fabrication of clip-type pulsimeter simulator. This result suggests that the clip-type pulsimeter can be used the reproducible and efficacious oriental diagnostic medical instrument.

• Journal of Korea Society of Industrial Information Systems
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• v.14 no.5
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• pp.149-154
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• 2009

By increasing people's average life span, interest for health is highly growing. According to hoping to check their body condition, people have a medical checkup periodically to check their condition. But, they can prevent disease or are able to make a health care through checking people's pulse or blood pressure. In this paper, two different pulse measurement systems were developed, one system using a photosensor which is able to measure transmissivity's change through blood volume and another system using a piezo-electric sensor which can measure pulse when it measures radial artery's pressure in the wrist are realized. We compared two systems each other.

• Journal of Chest Surgery
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• v.35 no.9
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• pp.643-652
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• 2002

As the prevalence of coronay artery disease is increasing, the surgical treatment has been universalized and operative outcome has been improved. We analyzed the short and mid-term results of 292 CABGs performed in Kangdong Sacred Heart Hospital. Material and Method: From June 1994 to December 2001, 292 patients underwent coronary artery bypass grafting. There were 173 men and 119 women and their ages ranged from 39 to 84 years with a mean of $61.8{\pm}9.1$ years. We analyzed the preoperative risk factors, operative procedures and operative outcome. In addition, we analyzed the recurrence of symptoms, long-term mortality and complications via out-patient follow-up for discharged patients. Result: Preoperative clinical diagnoses were unstable angina in 137(46.9%), stable angina in 34(11.6%), acute myocardial infarction in 40(13.7%), non-Q myocardial infarction in 25(8.6%), postinfarction angina in 22(7.5%), cardiogenic shock in 30(10.3%) and PTCA failure in 4(1.4%) patients. Preoperative angiographic diagnoses were three-vessel disease in 157(53.8%), two-vessel disease in 35 (12.0%), one-vessel disease in 11(3.8%) and left main disease in 89(30.5%) patients. We used saphenous veins in 630, internal thoracic arteries in 257, radial arteries in 50, and right gastoepiploic arteries in 2 distal anastomoses. The mean number of distal anastomoses per patient was $3.2{\pm}1.0$ There were 18 concomitant procedures ; valve replacement in 8(2.7%), left main coronary artery angioplasty in 6(2.1%), patch closure of postinfarction ventricular septal defect(PMI-VSD) in 2(0.7%), replacement of ascending aorta in 1(0.3%) and coronary endarterectomy in 1(0.3%) patient. The mean ACC time was $96.6{\pm}35.3 $ minutes and the mean CPB time was $179.2{\pm}94.6$ minutes. Total early mortality was 8.6%, but it was 3.1% in elective operations. The most common cause of early mortality was low cardiac output syndrome in 6(2.1%) patients. The stastistically significant risk factors for early mortality were hypertension, old age($\geq$ 70 years), poor LV function(EF＜40%), congestive heart failure, preoperative intraaortic balloon pump, emergency operation and chronic renal failure. The most common complication was arrhythmia in 52(17.8%) patients. The mean follow-up period was $39.0{\pm}27.0$ months. Most patients were free of symptoms during follow-up. Fourteen patients(5.8 %) had recurrent symptoms and 7 patients(2.9%) died during follow-up period. Follow-up coronary angiography was performed in 13 patients with recurrent symptoms and they were managed by surgical and medical treatment according to the coronary angiographic result. Conclusion: The operative and late results of CABG in our hospital, was acceptable. However, There should be more refinement in operative technique and postoperative management to improve the results.

• Journal of Chest Surgery
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• v.32 no.5
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• pp.456-460
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• 1999

Background: Thoracic sympathectomy for hyperhidrosis has been recognized as an effective treatment using thoracoscopic devices and operative techniques, but the satisfaction has decreased due to a compensatory hyperhidrosis. Therefore, the postoperative results and compensatory hyperhidrosis were analyzed. We also measured the temperature differences in the hand and foot during the preoperative and postoperative periods and measured the blood flow of upper and lower extremities. Material and Method: From December 1995 to July 1998, total of 47 patients with hyperhidrosis underwent sympathectomy via VATS at the Department of Thoracic and Cardiovascular Surgery, Kangnam St. Mary's Hospital. The patients were evaluated for preoperative and postoperative temperature changes on the finger and toe, and preoperative and postoperative blood flows were measured by the Doppler examination on the digital artery, radial artery and dorsalis pedis artery. Result: There were no operative deaths but some complications existed: 7 pneumothorax, 3 recurrence and 1 Honor syndrome. Ninety-five percent of the patients also had compensatory sweating especially in the trunk. There were 5 patients who regretted recurring the operation because of the compensatory sweating. Sweating decreased in 46% of the sole hyperhidrosis patients. The temperature difference between preoperation and postoperation was 1$^{\circ}C$ on the right hand side and 1.9$^{\circ}C$ on the left hand side(P<0.05). There was no significant temperature difference on the sole. Blood flow increased significantly in the palm, but no difference in the sole. Conclusion: In conclusion, thoracic sympathectomy for hyperhidrosis is a safe and effective treatment but satisfaction has been decreased by the compensatory sweating; therefore, it is important to thoroughly explain the compensatory sweating prior to surgery. Improvement of the plantar hyperhidrosis is not due to a physiological change, but to a psychological stability.

• The Korean Journal of Nuclear Medicine
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• v.35 no.3
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• pp.152-160
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• 2001

Purpose: We tried to establish the reproducibility of the measurement of maximal elastance (Emax) and to compare the degree of the reproducibility of two estimation methods: single pressure-volume loop method and parameter optimization method. Materials and methods: In 47 patients (42 males and 5 females, $53{\pm}10$ years old) with suspected coronary artery disease (election fraction; 22-68%), gated Tc-99m MIBI myocardial SPECT and arterial tonometry were acquired. In 11 patients among these 47 patients, gated SPECT and tonometry were performed twice consecutively with patients in situ. Emax and void volume (Vo) were estimated using single pressure-volume loop method of Lee and parameter optimization method based on linear approximation of Yoshizawa. Correlation between the consecutive measurements by each method and correlation between the two estimation methods were compared. Results: Reproducibility of Emax (r=0.96) and Vo (r=0.99) by single pressure-volume method was better than the reproducibility of Emax (r=0.89) and Vo (r=0.64) by parameter optimization method. Correlations of Emax and Vo were fair between the two methods. The correlation of Emax (r=0.77) was better than that of Vo (r=0.55). Conclusion: Reproducibility of Emax measurement by single pressure-volume loop method using gated myocardial SPECT and arterial tonometry was excellent. Reproducibility by parameter optimization method was also fair but was less than that achieved by single pressure-volume method.