http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최규택(Kyu Taek Choi),전재규(Jae Kyu Jeon) 대한통증학회 1989 The Korean Journal of Pain Vol.2 No.1
N/A It has been standard practice in many institutions to use a combination of a light general anesthesia and an epidural block for lower abdominal and pelvic surgery. This combination of a balanced anesthesia can provide various benefits to the patient such as less bleeding in the surgical field, the use of a lower concentration of general anesthetics, less muscle relaxant, and post operative pain management. However there are several problems associated with hemodynamics such as bradycardia and hypotension etc. In order to block the pain of the high surgical area with a lumbar epidural puncture postoperatively, a large volume of local anesthetic is required and consequently an extensive blockade of sympathetic, sensory and motor functions can occur causing motor weakness, numbness and postural hypotension. Therefore, the patient is unable to have early ambulation postoperatively. In this study, thoracic epidural catheterization was undertaken to locate the tip of the catheter exactly at the surgical level for upper abdominal surgery, and was followed by general anesthesia. Twenty-one patients scheduled for upper abdominal surgery were selected. Fifteen of them had he-patobiliary operations and the remaining 6 had gastrectomies. Thoracic epidural punctures were performed mostly at T9 - T10 (57.1%) and TS- T9. Neuromuscular blocking agents were not used in half of the cases and the, mean doses of relaxant were 3.5±1.0mg in gastrectomies, and 2.7±0.9mg in cases of hepatobiliary operation. Epidural morphine was injected 1 hour before the end of the operation for postoperative pain control. Eight patients did not require additional analgesics and the mean dose of epidural morphine was 2.2±0.9mg, and 13 cases were given 0.125% epidural bupivacaine when patients complained of pain. Their initial doses of epidural morphine were 1.9+0.4mg and the mean duration of bupivacaine was 6 hours 20 minutes+40 minutes. In conclusion, thoracic epidural analgesia is valuable to reduce postoperative pain in patients with upper abdominal surgery, However, it is not easy to maintain this balanced anesthesia with high epidural analgesia and light general anesthesia for upper abdominal surgery because of marked hemodynamic changes. Therefore, further practice will be required.
스트랩캐스팅한 구상흑연주철 박판의 미세조직과 기계적 성질에 관한 연구
최규택(Kyu Taek Choi),박재영(Jae Young Park),나형용(Hyung Yong Ra) 한국주조공학회 1999 한국주조공학회지 Vol.19 No.1
N/A Strip casting process, a new casting technology which makes thin strip of 0.5∼5 ㎜ thickness directly from molten metal, has been dramatically developed for past 10 years and faced commercialization in the case of STS304 strip. In this study, ductile cast iron strip which is 1.1 ㎜ thick and 100 ㎜ wide is manufactured by the twin roll strip caster. Graphite and matrix structure of the strip can be controlled through heat treatments and the mechanical properties are examined. The microstructure of the as-cast strip consists of cementite and pearlite. Especially the equiaxed crystal zone of pearlite exists in the center region of the thickness due to the characteristics of the strip casting process. Matrix structure can be transformed into fully ferrite or ferrite/pearlite mixed structures by the different graphitization heat treatments. The heat-treated strip with ferrite/pearlite matrix structure showed higher hardness and tensile strength than that with full ferrite matrix structure. (Received December 14, 1998)
허인영 ( In Young Huh ),최규택 ( Kyu Taek Choi ),천무영 ( Moo Young Cheon ),박평환 ( Pyung Hwan Park ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.6
Cyanosis in children is most often caused by pulmonary disease, or cyanotic heart disease but is rarely caused by hematological problems such as methemoglobinemia and sulfhemoglobinemia. Abnormal hemoglobins with a reduced oxygen affinity are an exceptionally uncommon cause of cyanosis in children. Hemoglobin-M (Hb-M) is rapidly auto-oxidized into the met-form resulting in the loss of its O2-binding ability. This hemoglobinopathy is inherited in an autosomal dominant pattern and is characterized by marked cyanosis. Hb-M affects the anesthetic management because of the anomalous absorption spectrum of Hb-M in standard pulse oximetry. Sufficient O2 delivery should be maintained by keeping a high FiO2 and intermittently checking the O2 delivery state using arterial blood gas analysis. We reported our experience of the anesthetic management of a patient with hemoglobin M. (Korean J Anesthesiol 2006; 50: 723~6)
임상연구 : 신선가스유량의 변화가 흡입마취제의 흡기가스농도에 대한 호기가스농도 비율에 미치는 영향
신원정 ( Won Jung Shin ),최규택 ( Kyu Taek Choi ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.6
Background: One way to make rapid increase in alveolar anesthetic concentration includes using high fresh gas flow rates. Fresh gas flow rates should be increased to compensate the amount of uptake either. This study was performed to elucidate optimal fresh gas flow rates for rapid induction by comparison of changes of ratio of expired to inspired concentration. Methods: The study population was composed of 107 patients undergoing thyroidectomy. Patients were randomly allocated to one of three groups who received desflurane or sevoflurane or isoflurane. Each group was randomly subdivided into three groups who received one of the fresh gas flow rate: 2, 5 or 10 L/min. Inspired anesthetic concentration (Fi) and expiratory anesthetic concentration (Fe), delivered concentration (FD) were recorded. Results: With same fresh gas flow rates, there were significant differences between Fe/Fi of desflurane, sevoflurane, isoflurane. With same anesthetics, Fe/Fi of desflurane and sevoflurane were not influenced by fresh gas flow rates. But Fe/Fi of isoflurane at 2 L/min was significantly lower than 5 L/min and 10 L/min. Fi/FD of desflurane at 10 L/min did not differ from sevoflurane. At 2 L/min and 5 L/min, Fi/FD of desflurane was highest and then sevofluane, isoflurane in that order. Conclusions: Because rates of Fe/Fi of desflurane and sevoflurane were not influenced by fresh gas flow rates, 2 L/min of fresh gas flow rates could be selected. However, considering the wash-in time in circuit, optimal choice of fresh gas flow rate for desflurane and sevoflurane could be 5 L/min, that of isoflurane be 10 L/min. (Korean J Anesthesiol 2006; 50: 629~36)
급성 폐손상 토끼에서 고빈도부분액체환기 시 흡호기대비가 환기 및 산소화에 미치는 영향
송명희 ( Myung Hee Song ),최인철 ( In Cheol Choi ),함경돈 ( Kyung Don Hahm ),정용보 ( Yong Bo Jeong ),최규택 ( Kyu Taek Choi ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.2
Background: We examined the effects of varying inspiratory to expiratory (I:E) ratio on gas exchange and hemodynamics during high frequency partial liquid ventilation (HFPLV), a combination of high frequency ventilation (HFV) and partial liquid ventilation (PLV), in a rabbit model of acute lung injury. Methods: Twelve rabbits treated with repeated saline lavage were divided into two groups. In the HFPL group (n=6), 6 ml/kg of perfluorodecaline was administered through the endotracheal tube. Rabbits in this group and in the HFJ group (n=6) were treated with high frequency jet ventilation (HFJV) at I:E ratios of 1:1, 1:2, and 1:3 for 15 minutes, and arterial blood gas, mixed venous blood gas and hemodynamic parameters were measured. Results: We observed no significant respiratory and hemodynamic differences between the two groups. At an I:E ratio of 1:1, the PaO2 was significantly higher, and the shunt rate and PaCO2 were significantly lower in both groups, compared with I:E ratios of 1:2 and 1:3. Cardiac output at the 1:3 I:E ratio was significantly higher than at 1:1. Conclusions: These findings indicate that, in this model, a 1:1 I:E ratio was superior for oxygenation and ventilation than I:E ratios of 1:2 or 1:3, while having no detrimental effects on hemodynamics. (Korean J Anesthesiol 2009;57:203∼9)