을지대학병원에서의 술후 통증관리 현황

강평희,최인환,이경혜 乙支病院 1997 乙支醫報 Vol.20 No.1

뇌출혈후 발생한 저체온 환자의 마취 경험

이경혜,강평희,최인환 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.33 No.6

Hypothermia is defined as a core temperature of less than 35oC. Hypothermia changes homeostasis of human body. It includes neurologic, cardiovascular, and metabolic abnormalities. we have anesthetized a woman patient who had intracranial hemorrhage with accidental hypothermia of 27.8oC. We managed for elevation of body temperature with elevation of room temperature(30oC), bladder irrigation with warm saline, application of warming pad and infusion of warming fluid during 4 hours and 20 minutes. At the end of anesthesia, her body temperature was 34.3oC. (Korean J Anesthesiol 1997; 33: 1225∼1228)

Isoflurane마취가 맥박·혈압 및 동맥혈 가스상에 미치는 영향

최세진,강평희 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

Changes in heart rate, mean arterial pressure, Pa02, and PaC02 caused by isoflurane anesthesia were investigated in patients premedicated with diazepam, atropine ane vistaryl. Isoflurane caused a slightly decrease in mean arterial pressure and caused a slightly increase in heart rate.

제왕절개술 환자에서 지속적 경막외 주입법과 정맥내 주입법에 의한 Morphine 의 술후 제통효과 및 부작용의 비교

이경혜,강평희,정현길 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.32 No.1

Background : Continuous epidural morphine infusion is a good and popular method to control postoperative pain. But intravenous morphine infusion after general anesthesia can avoid anxiety during operation and also control postoperative pain. We compared analgesia and side effects between continuous epidural infusion and continuous intravenous infusion of morphine sulfate to control of postoperative pain after cesarean section. Methods : Forty women who received cesarean section were randomly divided into epidural and IV groups. Morphine 0.08 mg/kg was administered intravenously as an initial loading dosage for both groups. Morphine 0.08 mg/kg for epidural group or morphine 0.8 mg/kg for IV group was diluted into 96ml of normal saline. A mixture was injected into Two-day Infusor which is continuously infused 2 ml/hr. The patients received morphine solution into epidural or intravenous route with Two-day Infusor according to their allocated group. The assessments for pain score with VAS, VRS, patient's satisfaction score and side effects were made at recovery room, 0.5, 3, 12, 24, 36, 48 and 60 hours after operation. Results : The VAS in IV group was significantly higher than that in epidural group at 3, 12, 24 and 36 hours after the operation (P$lt;0.05). The VRS in IV group was significantly higher than in epidural group at recovery room and 3 hours of postoperative period (p$lt;0.05). The frequency of pruritus, nausea, vomiting, back pain and urinary retention were less in IV group than in epidural group. The patient's satisfaction scores were similar in both groups. Conclusions : The management of postoperative pain in epidural group was more effective than the continuous intravenous morphine infusion. But the incidence of complications was more frequent in the epidural group while patient's satisfaction scores were similar in both groups. Therefore, the continuous intravenous morphine infusion can be used effectively as a postoperative pain management. (Korean J Anesthesiol 1997; 32: 97∼103)

Marfan syndrome 환자의 척추 측만증 교정을 위한 마취관리

정봉수,임선아,강평희,정연진,박창길,이경혜 乙支病院 1998 乙支醫報 Vol.21 No.1

Ethrane 마취중 Steroid 사용환자에서의 T-cell Subsets 의 변화

김혜자,최세진,강평희 대한마취과학회 1991 Korean Journal of Anesthesiology Vol.24 No.2

The in vivo effects of ethrane and single intravenous injection of hydrocortisone 250 mg on T-cell subsets (T3, T4 and T8), s-cortisol, s-Na^+ and K^+, polymorphonuclear leukocytes, lymphocytes and HSR (T-helpers to T-suppressors ratio) has been studied. Six healthy volunteers and 16 patients was selected and observed. Sixteen patients has been done surgery under ethrane anesthesia, and single dose of hydrocortisone 250 mg was injected intravenously to eight patients among them. The result is as follows; 1) Serum cortisol level was increased after surgery under ethrane anesthesia and was decreased bellow control value at 24 hours after injection of hydrocortisone 250 mg. 2) After surgery under ethrane anesthesia, PMN's counts and monocyte counts in peripheral blood were increased, but absolute number of lymphocytes and T-cell subsets were decreased. 3) After surgery under ethrane anesthesia with hydrocortisone 250 mg, there was the most elevation of PMN's counts and the most redution of absolute number of T-cell subsets at 5 hours and was somewhat tended to return to control values, but remained changed at 24 hours, and monocyte counts was unchanged. 4) Adding hydrocortisone 250 mg compared with ethrane anesthesia alone, the increasing rate of PMN's counts and the decreasing rate of lymphocytes and absolute number of T-cell subsets were higher at 5 hours, and were lower at 24 hours. 5) Relative percentage of T-cell subsete and HSR were unchanged after surgery under ethrane anesthesia alone and adding hydrocortisone 250 mg.

감기치료후 방광의 Hutch`s Diverticulum 수술을 위한 전신마취중 발생한 심한 과탄산 혈증

정봉수,임선아,강평희 대한마취과학회 1998 Korean Journal of Anesthesiology Vol.35 No.2

The surgical and anesthetic management for giant cerebral aneurysm is difficult because of their great size or lack of an anatomic neck. Recently, total circulatory arrest, profound hypothermia using cardiopulmonary bypass and the cerebral protection of barbiturate are able to manage the difficult cerebral aneurysm operation due to the ease of the surgical approach and the decreased post operative neurological injury. These techniques were successfully utilized in the patient of the diamerer-3 cm sized giant cerebral aneurysm located at the bifurcation between the right internal carotid artery and the anterior cerebral artery, and the surgical and anesthetic considerations are reviewed. (Korean J Anesthesiol 1998; 35: 767∼771)

수술시 수혈의 임상적 고찰

최세진,김종렬,강평희 대한마취과학회 1988 Korean Journal of Anesthesiology Vol.21 No.6

Of atotal of 11690 operative cases, 2111 patients who received a transfusion during operation were analyzed statistically at the Department of Anesthesiology, Chung-Nam National University Hospital from January 1985 to December 1987 according to department , sex, preoperative hemoglobin, blood type, operation time and blood component therapy. The results were as follows: 1) The percentage of transfused patients among all operative cases was 18.05 percent. 2)Of all the transfused patients, 477 cases (22.95%) were general surgery cases. 3) Of all the transfused patients, 1187 cases(56.2%) were male. 4) The mean value of hemoglobin measured preoperatively was 10-15g/dl (72.19%). 5) The most frequent cases of transfusion were done in operations requiring 2-3 hours. 6) Blood component therapy was preformed 11 percent in 1985, 26.73 percent in 1986, and 80.72 percent in 1987. The numver of cases receiving blood component therapy has tended to increase year by year.

직장암 환자의 지주막하 15 % phenol in Glycerine 주입에 의한 암성통증 차단

이원형,최세진,강평희,김대열 대한마취과학회 1988 Korean Journal of Anesthesiology Vol.21 No.5

This patient who was a 42-year-old female had suffered from bearing down sensation and pain on anal region due to metastatic rectal cancer. She was done intrathecal block with 15% phenol in glycerine. The result was exellant to bearing down sensation and pain on anal area. Because lower back pain, pain on lower extremity and generalized painful sensation was not improved, we has done pharmacologic assistance. Urination difficulty became slightly aggrevated but was improved at post-block day 4th. This pain clinic report that intrathecal block with 15% phenol in glycerine was effective to treatment of cancer pain without major complications.

딥러닝 기반 송신전력 조절방안의 성능검증

이웅섭,김성환,류종열,반태원,Lee, Woongsup,Kim, Seong Hwan,Ryu, Jongyeol,Ban, Tae-Won 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.3

Recently, the deep learning technology has gained lots of attention which leads to its application to various fields. Especially, there are recent attempts to overcome the limit of wireless communications systems through the use of the deep learning. In this paper, we have verified the performance of deep learning based transmit power control scheme. Unlike previous transmit power control schemes where the optimal transmit power is derived by solving the optimization problem explicitly, in the deep learning based transmit power control, the general solver for the optimization problem is derived through the deep neural network (DNN). Especially, by using the spectral efficiency as the loss function of DNN, the training can be performed without needing labels. Through simulation based on Tensorflow, we confirm that the transmit power control based on deep learning can achieve the optimal performance while reducing the computational complexity by 1/200. 최근 딥러닝 기술이 큰 관심을 받으며 다양한 분야에 적용되고 있다. 특히 다양한 무선통신기술에 딥러닝을 접목하여 기존 통신시스템의 한계를 뛰어넘으려는 시도가 이루어지고 있다. 본 논문에서는 딥러닝 기반 무선통신 시스템 송신전력 조절방안의 성능검증을 수행하였다. 딥러닝 기반 송신전력 조절방안에서는 수학적 최적화 문제를 직접 풀어서 최적의 전력을 결정하는 기존 방식과 달리 심층신경망 구조를 학습시켜서 채널에 따라 최적의 송신전력을 찾는 General solver를 도출하여 이를 이용한다. 특히 시스템의 주파수 효율을 심층신경망 학습의 손실함수로 사용함으로써 라벨없이 학습을 가능케 한다. 본 논문에서는 Tensorflow 기반 성능분석을 통해 딥러닝 기반 송신전력 조절방안과 최적방안의 성능이 일치함을 보였고, 또한 제안 방안이 기존의 방식에 비해서 1/200의 계산복잡도로 송신전력을 찾을 수 있음을 보임으로써 실제 무선통신시스템에서의 적용가능성을 검증하였다.