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임상연구 : 척추마취 환자에서 차단높이가 진정을 위한 Propofol 요구량에 미치는 영향
신일우 ( Il Woo Shin ),고지은 ( Ji Eun Go ),박경언 ( Kyeong Eon Park ),손주태 ( Ju Tae Sohn ),정영균 ( Young Kyun Chung ),이헌근 ( Heon Keun Lee ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.6
Background: It has been reported that spinal anesthesia has a sedative effect and so this decreases the hypnotic requirement of intravenous anesthetic. Therefore, we have conducted a prospective randomized study to investigate the effect of the spinal anesthesia level on the hypnotic requirements for conscious sedation. Methods: Forty adult patients were scheduled to undergo spinal anesthesia, and they were randomly allocated to one of the two groups. After subarachnoid injection of 0.5% hyperbaric bupivacaine 16 mg, the patients in group 1 and group 2 were maintained in a reversed Trendelenburg position and a Trendelenburg position, respectively. After fifteen minutes, the target controlled infusion of propofol was started for achieving a target concentration of 1μg/ml, and the mean BIS for 1 min was checked after an effect site concentration (Ce) of 1μg/ml was reached. The target controlled infusion of propofol was restarted at a target concentration (Tc) of 1.5μg/ml, and the mean BIS for 1 min was checked after the Ce level of 1.5μg/ml was reached. Results: The mean BIS at 1μg/ml Ce was 90.0 ± 8.5 and 77.8 ± 10.3 in group 1 and group 2, respectively. The mean BIS at 1.5 g/ml Ce was 73.6 ± 19.4 and 60.0 ± 13.1, respectively. Conclusions: There was a significant difference in the requirements of propofol for conscious sedation between the below T12 block group and the above T4 block group. (Korean J Anesthesiol 2006; 50: 642~5)
Remifentanil은 흰쥐의 국소 허혈-재관류 모델에서 심근 보호 효과가 있는가?
신일우 ( Il Woo Shin ),조만석 ( Man Seok Cho ),장인석 ( In Seok Jang ),손주태 ( Ju Tae Sohn ),이헌근 ( Heon Keun Lee ),정영균 ( Young Kyun Chung ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.2
Background: It is known that some opioids protect the myocardial tissue from myocardial ischemia-reperfusion (I/R) injury. The aim of this study was to investigate whether remifentanil, at a clinically relevant concentration that`s during the peri-ischemic period, has a protective effect against a regional I/R injury in an in vivo rat heart model. Methods: Rats were subjected to 25 minutes of coronary artery occlusion and this was followed by 24 hours of reperfusion. A microcatheter was advanced into the left ventricle and the hemodynamic function was evaluated after 24 hours of reperfusion. The infarct size was determined by triphenyltetrazolium staining. The serum level of cardiac troponin-I (cTnI) was determined by ELISA (enzyme-linked immunosorbent assay). Results: Remifentanil administration during the peri-ischemic period didn`t show any identifiable protective effects for the hemodynamic function or to reduce the infarct size. In the control group, the peak rate of the ventricular pressure increase (+dP/dt(max)) (P<0.05) and the peak rate of the intraventricular pressure decline (-dP/dt(max) P<0.05) were significantly decreased as compared to those values for the sham group. In the remifentanil group, the +dP/dt(max) and -dP/dt(max) were not improved compared to those values of the control group. The infarct size was 45.6% of the area at risk in the control group, and the infarct size was reduced by administration of remifentanil to 43.2% in the remifentanil group. The I/R-induced serum level of cTn-I was not reduced by remifentanil infusion during the peri-ischemic period. Conclusions: Remifentanil, at a clinically relevant concentration that`s infused during the peri-ischemic period, has no myocardial protective effect after regional myocardial I/R injury in an in vivo rat heart model. (Korean J Anesthesiol 2009;57:190∼4)
증례보고 : 난치성 개흉술후통증증후군 환자에서 시행한 척수자극술
이헌근 ( Heon Keun Lee ),이승화 ( Seung Wha Lee ),신일우 ( Il Woo Shin ),손주태 ( Ju Tae Sohn ),정영주 ( Yeong Ju Jeong ),정영균 ( Young Kyun Chung ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.5
Post-thoracotomy syndrome is a condition characterized by pain that continues for more than 2 months after a thoracotomic procedure. Some patients suffer from devastating chest pain despite receiving multimodal treatment such as analgesics, antidepressants, anticonvulsants and nerve blockers. Spinal cord stimulation has been reported to be a promising relief for the intractable neuropathic pain. A 60-year-old man who had been suffering from post-thoracotomy pain for 20 years showed relief of pain after spinal cord stimulation. Spinal cord stimulation thus seems to be a viable option for patients who do not respond to conventional pain management therapy. (Korean J Anesthesiol 2009;57:678∼81)
정영균,손주태,황경일,강성준,김홍범,이헌근 대한마취과학회 1999 Korean Journal of Anesthesiology Vol.37 No.4
The fat embolism syndrome is a serious and potentially life threatening complication of long bone trauma, blunt trauma and intramedullary manipulation. A 26-year-old woman underwent an intramedullary nailing of the femur under general anesthesia 45 hours after a traffic accident. The operation ended uneventfully and the patient was extubated in the operatirg room. About one hour after the patient arrived at the recovery room, she progressively developed tachycardia, tachypnea, cyanosis and drowsiness. The fat embolism syndrome was suspected because of the above clinical signs, and because pulmonary edema appeared on a simple chest A-P. During six days of intensive treatment in response to the fat embolism syndrome, the patient,s vital signs and ventilatory status progressively improved. The patient was uneventfully discharged from the hospital 19 days after her operation. (Korean J Anesthesiol 1999; 37: 731∼736)
소아중환자 호흡관리 실태(1985) : 제 5 보 The fifth report
정영균,함병문 대한마취과학회 1988 Korean Journal of Anesthesiology Vol.21 No.1
A clinical survey was performed on 342 patients under the age of 15 years who were admitted to the respiratory intensive care unit(RICU) between January and December, 1985. The results were as follows 1) The total number of RICU patients in 1985 was 610, and 342(56.1%) were pediatric patients. 2) The ratio of male to female was 55%(188 cases) to 45%(154 cases). 3) The most prevalent age group was 1 to 5 years of age, 145 cases(42.4%). 4) Of the 342 patients, 308 were chest surgery patients(90.1%), 30 were pediatric surgery (8.8%), 2 were neurosurgery, one was a general surgery and one was a plastic surgery patient. 5) The mortality rate was 3.5%(12 cases) which was significantly decreased from the 1984 rate of 5.9% Neonates experienced the highest mortality rate(l0.5%), but this decreased with aging. 6) The mortality rate according to procedure was 2.6%(8 cases) in chest surgery, 10%(3 cases) in pediatric surgery, and 100%(1 case) in general surgery and increased as the length of ventilatory support time increased. 7) The duration of ventilatory support was 57.93 hrs in chest surgery, 68.86 hrs in pediatric surgery and 59.75 hrs on average. Ventilatory support of 12~24 hrs was required in 115 (33.6%) cases. 8) The types of ventilators used were Bourns(132 cases, 38.6%), Bennet MA-1 (47 cases, 13.7%), Roche (45 cases, 13.2%), Bear-Cub(40 cases, 11.7%), etc. 9) The two major causes of death were low cardiac output syndrome(5 cases) in chest surgery and sepsis (2 cases) in pediatric surgery.
비색분석법에 의한 Methyl Gallate의 인체 구강유상피암종세포와 인체 피부흑색종세포에 대한 세포독성 평가
정영균,한두석 원광대학교 치의학연구소 2001 圓光齒醫學 Vol.10 No.3
In order to develop antitumor agent which indicates weak side effects and strong antitumor activity, cytotoxicity of Methyl gallate (MG) was evaluated by MTT assay and SRB assay of colorimetric assay methods on the cultured NIH 3T3 fibroblasts, human oral epithelioid carcinoma cells (KB cells) and human skin melanoma cells (SK-MEL-3 Cells). NIH 3T3 fibroblast, KB cells and SK-MEL-3 cells were cultured in EMEM and RPMI 1640 media containing 10 % fetal bovine serum, antibiotics and fungizone. After incubation for 24 his, the cells were treated with MG by dose dependent manner for 48 hrs under the same condition. The MTT and SRB quantity were measured by ELISA reader (Spectra Max 250, USA). The microscopic study was carried out to observe morphological changes of cultured NIH 3T3 cells, KB cells and SK-MEL-3 cells. The results were as follows; 1. The SRB0 of human lung tumor cells, human ovarian tumor cells, human melanoma tumor cells, human colon tumor cells and human CNS tumor cells treated with MG was 69.80μM, 44.90μM, 22.12μM, 29.24μM and 59.29μM, respectively. 2. The MTT50 and SRB50 in NIH 3T3 cells treated with MG were 16.67mM and 8.7 mM, respectively. 3. The MT 50 and SRB50 in KB cells treated with MG were 65.55μM and 103.90μM, respectively. 4. The MTT50 and SRB50 in SK-MEL-3 cells treated with MG were 168.81μM and 254.35μM, respectively. 5. Morphological change of cultured NIH 3T3 cells treated with MG was weak, but KB cell treated with MG was severe.