• Title/Summary/Keyword: Pressure stimulation

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Case Study of Microseismic Management Systems for Basel EGS Project (Basel EGS Project의 미소진동관리 사례연구)

  • Lee, Sangdon
    • Tunnel and Underground Space
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    • v.23 no.6
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    • pp.572-580
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    • 2013
  • In this case study, I examined the microseismic safety management system of Deep Heat Mining Basel (DHMB) as EGS Geothermal Project which was conducted in Basel, Switzerland. EGS Geothermal Power projects which require induced seismic event by stimulation for creation of EGS geothermal reservoir have to be controlled pressure and flow rate of stimulation by establishment of microseismic safety management system. Traffic light system and Communication response procedure of DHMB project to respond step by step corresponding microseismic event intensity through continuous monitoring during stimulation period have been managed and established in advance of stimulation. However, the project was discontinued because of an earthquake to occur larger than expected one due to post-injection seismicity occurring in the geothermal reservoir after completion of injection for stimulation. The result of post analysis, Real-time traffic light system was verified to need a establishment of new microseismic safe management system to be considered post-injection seismicity phenomenon.

A Study about Sasang Constitutional difference on Autonomous Function after Acupuncture stimulation (침자극 후 사상체질별 자율신경활동의 변화에 대한 연구)

  • Kwak, Chang-Kyu;Sohn, Eun-Hae;Lee, Eui-Ju;Koh, Byung-Hee;Song, Il-Byung;Hwang, Wook
    • Journal of Sasang Constitutional Medicine
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    • v.16 no.3
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    • pp.76-84
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    • 2004
  • 1. Objectives This paper is intended to find out Sasang Constitutional difference on Autonomous Function after Acupuncture stimulation in healthy subjects. 2. Methods of Research Nineteen healthy volunteers(Soyangin 6, Taeumin 7, Soeumin 6) had acupunctured perpendicularly into the Hapkok point(LI4) and the Taechung point(Liv3). Heart Rate Variability, Mean Heart Rate and Blood Pressure were checked 4 times(before and after Acupuncture stimulation) to evaluate Autonomous Function. 3. Results & Conclusions The conclusions were as follows 1. There was no statistically significant Sasang Constitutional difference on sympathetic activity and parasympathetic activity before Acupuncture stimulation. 2. Acupuncture stimulation caused a statistically significant increase in the parasympathetic activity in the whole subject. 3. After Acupuncture stimulation, there was a statistically significant increase in the parasympathetic activity in Soeumin and a tendency of increase in the parasympathetic activity in Soyangin. But there was a tendency of increase in the Sympathetic activity in Taeumin.

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Change of Extracellular Glutamate Level in Striatum during Deep Brain Stimulation of the Entopeduncular Nucleus in Rats

  • Lee, Hyun-ju;Sung, Jae Hoon;Hong, Jae Taek;Kim, Il Sup;Yang, Seung Ho;Cho, Chul Bum
    • Journal of Korean Neurosurgical Society
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    • v.62 no.2
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    • pp.166-174
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    • 2019
  • Objective : Globus pallidus interna (GPi) is acknowledged as an essential treatment for advanced Parkinson's disease (PD). Nonetheless, the neurotransmitter study about its results is undiscovered. The goal of this research was to examine influences of entopeduncular nucleus (EPN) stimulation, identical to human GPi, in no-lesioned (NL) rat and 6-hydroxydopamine (6-HD)-lesioned rat on glutamate change in the striatum. Methods : Extracellular glutamate level changes in striatum of NL category, NL with deep brain stimulation (DBS) category, 6-HD category, and 6-HD with DBS category were examined using microdialysis and high-pressure liquid chromatography. Tyrosine hydroxylase (TH) immunoreactivities in substantia nigra and striatum of the four categories were also analyzed. Results : Extracellular glutamate levels in the striatum of NL with DBS category and 6-HD with DBS category were significantly increased by EPN stimulation compared to those in the NL category and 6-HD category. EPN stimulation had no significant effect on the expression of TH in NL or 6-HD category. Conclusion : Clinical results of GPi DBS are not only limited to direct inhibitory outflow to thalamus. They also include extensive alteration within basal ganglia.

Pressure Ulcers Treatment in Physical Therapy (욕창과 물리치료적 접근에 관한 고찰)

  • Lee, Hyun-Min;Chun, Song-Hee;Kang, Jong-Ho;Bang, Hyun-Soo;Kim, Jin-Sang
    • Journal of the Korean Society of Physical Medicine
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    • v.3 no.1
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    • pp.39-45
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    • 2008
  • Purpose : The purpose of this study was understanding the pressure ulcers and consider the physical therapy for pressure ulcers. Methods : This is a literature study with books, articles and poster. Results : We consider pressure ulcers can be treated with physical therapy which can promote healing process. Conclusion : Physical therapy in patients with pressure ulcers is required and among various physical therapeutic approaches, the method of general coordinative manipulation is considered more necessary.

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Various Factors Influencing Thoracic Duct Lymph Flow in the Dogs (임파유통에 영향을 주는 인자에 관한 실험적 연구)

  • Kim, Ki-Whan;Earm, Yung-E
    • The Korean Journal of Physiology
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    • v.9 no.1
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    • pp.45-56
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    • 1975
  • Various factors influencing the lymph flow from thoracic duct were investigated in an attempt to evaluate their contributing degree and the mechanisms. Sixteen mongrel dogs weighing between 10 and 16 kg were anesthetized and polyethylene catheters were inserted into the thoracic duct and femoral veins. Arterial blood pressure, heart rate, central venous pressure, lymph pressure and lymph flow were measured under various conditions. Electrical stimulation of left sciatic nerve, stepwise increase of central venous pressure, manual application of rhythmical depressions onto abdomen, injection of hypertonic saline solution and histamine infusion were employed. Measurement of cental venous pressure was performed through the recording catheter inserted into abdominal inferior vena cava. Changes in central venous pressure were made by an air-ballooning catheter located higher than the tip of the recording catheter in the inferior vena cava. Lymph flow from thoracic duct was measured directly with a graduated centrifuge tube allowing the lymph to flow freely outward through the inserted cannula. The average side pressure of thoracic lymph was $1.1\;cmH_2O$ and lymph flow was 0.40 ml/min or 1.9 ml/kg-hr. Hemodynamic parameters including lymph flow were measure immediately before and after (or during) applying a condition. Stimulation of left sciatic nerve with a square wave (5/sec, 2 msec, 10V) caused the lymph flow to increase 1.4 times. The pattern of lymph flow from thoracic duct was not continuous throughout the respiratory cycle, but was continuous only during Inspiration. Slow and deep respiration appeared to increase the lymph flow than a rapid and shallow respiration. Relationship between central venous pressure and the lymph flow revealed a relatively direct proportionality; Regression equation was Lymph Flow (ml/kg-hr)=0.09 CVP$(cmH_2O)$+0.55, r=0.67. Manual depressions onto the abdomen in accordance with the respiratory cycle caused the lymph flow to increase most remarkably, e.g,. 5.5 times. The application of manual depressions showed a fluctuation of central venous pressure superimposed on the respiratory fluctuation. Hypertonic saline solution (2% NaCl) administered Intravenously by the amount of 10 m1/kg increased the lymph flow 4.6 times. The injection also increased arterial blood pressure, especially systolic Pressure, and the central venous pressure. Slow intravenous infusion of histamine with a rate of 14-32 ${\mu}g/min$ resulted in a remarkable increase in the lymph flow (4.7 times), in spite of much decrease in the blood pressure and a slight decrease in the central venous pressure.

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The Noxiousness of Aldosterone Analogue-induced Senile Disease-related Hypertension and Inhibition of the Aldosterone by Silver Spike Point Electrical Stimulation in Elderly People -The Approach of Basic Physical Therapy for the Study of Cardiovascular Disease-related Specialized Physical Therapy- (알도스테론 동족체-유도 노인성질환-연관 고혈압의 유해와 노인에 적용한 은침점전기자극의 알도스테론 억제 -심혈관질환전문물리치료 연구를 위한 기초물리치료학적 접근을 중심으로-)

  • Lee, Sook-Hee;Kang, Joon-Hwan;Lee, Sang-Bin;An, Ho-Jung;Kim, Moo-Gi;Kim, Soon-Hee;Kim, Jung-Hwan
    • Journal of Korean Physical Therapy Science
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    • v.13 no.2
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    • pp.67-83
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    • 2006
  • The present study examined that in Vivo/Vitro test is investigated in normotensive sham-operated rats (NSR) and aldosterone-analogue deoxycorticosterone acetate (DOCA)-salt hypertensive rats (ADHR) and that the antihypertensive effect was induced by silver spike point (SSP) electrical stimulation at meridian points(CV-3, -4, Ki-12, SP-6, LR-3, BL-25, -28, -32, -52), specifically, such as aldosterone in 24 hour urine analysis from healthy volunteer. The gross examination and morphometric-histological changes, such as hypertrophy, production of necrotic tissues, and the changes of cell arrangement on the kidney, and adrenal gland were markedly observed in aldosterone-analogue DOCA-salt hypertensive rats compared with those from normotensive sham-operated rats. The systolic blood pressure, weight of kidney and adrenal gland were significantly increased in ADHR than that in NSR. The required time of PSS-induced resting tone was significantly increased in ADHR than that in NSR. However, the voltage-dependent K+ (Kv) currents were significantly decreased in ADHR than that in NSR. The urine analysis showed that the concentration of aldosterone was significantly decreased in resting state from the elderly people compared with those from the adolescent healthy volunteer. The current of 1 Hz continue type of SSP electrical stimulation significantly decreased in the concentration of aldosterone of 24 hour urine from the elderly people. These results suggest that the development of aldosterone analogue-induced hypertension is associated with changed the weight of kidney and adrenal gland, blood pressure, resting tone and Kv currents, which directly affects blood pressure. Therefore, the hypertension is a risk factor on cerebrovascular disease. Moreover, these results suggest that the diminished responsiveness to SSP electrical stimulation, especially current of 1Hz continue type, in elderly people may be, in part, related by the increased of antihypertensive effects.

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The Changes of the Heart Rate, Hand Function, and Health related Quality of Life of the People with Intellectual Disability through the Increase of the Auditory Stimulation (청각자극 증가에 따른 지적장애인의 심박수와 손 기능, 건강관련 삶의 질의 변화)

  • Son, Sung-Min;Kang, Jin-Ho;Bak, Ah-Ream
    • Journal of Korea Entertainment Industry Association
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    • v.14 no.5
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    • pp.217-227
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    • 2020
  • The purpose of the study is to analyze the changes of the heart rate, hand function, and health related quality of life of the people with intellectual disability through the increase of the auditory stimulation. The subjects were 16 people with intellectual disability. The increase of the auditory stimulation was modulated through the music sound and the intensity was consisted of 60dB, 65dB and 70dB. The wist heart rate and blood pressure monitor was used to measure the heart rate during the application of the auditory stimulation increase. The hand function of right and left hand was measured by the Purdue pegboard. Health related of quality of life was measured by the short form-8 health survey. As the results, the increase of the heart rate was showed by the increase of the auditory stimulation and the decrease of the hand function and health related quality of life was showed. For these, the increase of the auditory stimulation acts as a psychological distress, thereby the increase of the heart rate and the reduction of the hand function and health relate quality of life showed. Thus, to decrease of the heart rate and increase the hand function and the health related quality of life of the people with intellectual disability, the intensity of the auditory stimulation should be considered in the environmental stimulation.

Effects of melatonin on heart rate and blood pressure in rat I. Effects on blood pressure (멜라토닌이 랫트에서 심박수 및 혈압에 미치는 효과 I. 혈압에 미치는 효과)

  • Oh, Sung-suck;Kim, Shang-jin;Kim, Jin-shang
    • Korean Journal of Veterinary Research
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    • v.41 no.3
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    • pp.327-332
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    • 2001
  • In recent years, experimental evidence have been suggested that melatonin has either contractive or relaxing effects on the vascular smooth muscle in vitro. But the effect of melatonin on the cardiovascular system in vivo had been emphasized about the hypotensive effect. In this work, we found not only hypotensive effect but also hypertensive effect of melatonin in rats and attempted to determine the mechanism of these effects elicited by melatonin. Regadless of concentration, melatonin(0.002~5 mg/kg) produced increase in mean blood pressure (MBP) in 36% (54/150 cases) and decrease in mean blood pressure in 64%(96/150 cases). As a whole melatonin caused an increase or a decrease in MBP without compensatory decrease or increase in heart rate. The melatonin-induced hypertension was abolished by the pretreatment of phenoxybenzamine, a ${\alpha}$-adrenoceptor antagoninst. The melatonin-induced hypotension was abolished by the pretreatment of propranolol, a ${\beta}$-adrenoceptor antagonist, ODQ, a NO-sensitive guanylate cyclase inhibitor, or nifedipine, a L-type $Ca^{2+}$ channel blocker, but not by bilateral cervical vagotomy. The results indicate that melatonin-induced hypertension may be related to ${\alpha}$-adrenoceptor stimulation and melatonin-indued hypotension may be related to ${\beta}$-adrenoceptor stimulation, inhibition of $Ca^{2+}$ channel and/or activation of guanylate cyclase.

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