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Yoon Ji Choi,Seong Ho Chang,Seung Zhoo Yoon,Sung Uk Choi,Hye Won Shin,Hye Won Lee,Hae Ja Lim,Suk Min Yoon 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.1
Levator ani syndrome (LAS) is a functional disorder of the pelvic floor muscles in which recurrent and persistent distressing pain is felt in the anus without detectable organic pathology. Eighty one percent of coccygodynia was alleviated by the levator massage when the massage motion was repeated 10 to 15 times on each side of the pelvis daily for 5 or 6 days. The authors encountered the LAS patient for whom successive visit to pain clinic was economic burden. Therefore, the authors managed the patient by intermittent levator massage with caudal block, once a week for 3 times, resulting in two years of pain free status. Intermittent levator massage with caudal block may be as effective as successive levator massage and induce longer painless period in the management of LAS. (Korean J Anesthesiol 2009; 57: 137~9)
Choi, Yoon Ji,Min, Sam Hong,Park, Jeong Jun,Cho, Jang Eun,Yoon, Seung Zhoo,Yoon, Suk Min Williams & Wilkins Co 2017 Medicine Vol.96 No.25
<P><B>Abstract</B></P><P><B>Background:</B></P><P>For patients undergoing general anesthesia, adequate warming and humidification of the inspired gases is very important. The aim of this study was to evaluate the differences in the heat and moisture content of the inspired gases with low-flow anesthesia using 4 different anesthesia machines.</P><P><B>Methods:</B></P><P>The patients were divided into 11 groups according to the anesthesia machine used (Ohmeda, Excel; Avance; Dräger, Cato; and Primus) and the fresh gas flow (FGF) rate (0.5, 1, and 4 L/min). The temperature and absolute humidity of the inspired gas in the inspiratory limbs were measured at 5, 10, 15, 30, 45, 60, 75, 90, 105, and 120 minutes in 9 patients scheduled for total thyroidectomy or cervical spine operation in each group.</P><P><B>Results:</B></P><P>The anesthesia machines of Excel, Avance, Cato, and Primus did not show statistically significant changes in the inspired gas temperatures over time within each group with various FGFs. They, however, showed statistically significant changes in the absolute humidity of the inspired gas over time within each group with low FGF anesthesia (<I>P</I> < .05). The anesthesia machines of Cato and Primus showed statistically significant changes in the absolute humidity of the inspired gas over time within each group with an FGF of 4 L/min (<I>P</I> < .05). However, even with low-flow anesthesia, the temperatures and absolute humidities of the inspired gas for all anesthesia machines were lower than the recommended values.</P><P><B>Conclusion:</B></P><P>There were statistical differences in the provision of humidity among different anesthesia workstations. The Cato and Primus workstations were superior to Excel and Avance. However, even these were unsatisfactory in humans. Therefore, additional devices that provide inspired gases with adequate heat and humidity are needed for those undergoing general anesthetic procedures.</P>
Choi, Yoon Ji,Kim, Min Chul,Lim, Young Jin,Yoon, Seung Zhoo,Yoon, Suk Min,Yoon, Hei Ryeo The Korean Neurosurgical Society 2014 Journal of Korean neurosurgical society Vol.56 No.2
Objective : Propofol and volatile anesthesia have been associated with metabolic acidosis induced by increased lactate. This study was designed to evaluate changes in pH, base excess (BE), and lactate in response to different anesthetic agents and to characterize propofol infusion-associated lactic acidosis. Methods : The medical records of patients undergoing neurosurgical anesthesia between January 2005 and September 2012 were examined. Patients were divided into 2 groups : those who received propofol (total intravenous anesthesia, TIVA) and those who received sevoflurane (balanced inhalation anesthesia, BIA) anesthesia. Propensity analysis was performed (1 : 1 match, n=47), and the characteristics of the patients who developed severe acidosis were recorded. Results : In the matched TIVA and BIA groups, the incidence of metabolic acidosis (11% vs. 13%, p=1) and base excess (p>0.05) were similar. All patients in the TIVA group who developed severe acidosis did so within 4 hours of the initiation of propofol infusion, and these patients improved when propofol was discontinued. Conclusions : The incidence of metabolic acidosis was similar during neurosurgical anesthesia with propofol or sevoflurane. In addition, severe acidosis associated with propofol infusion appears to be reversible when propofol is discontinued.
임상연구 : Tissue Factor 유전체 자리 다형성과 체외 순환을 요하는 심장 수술 후 섬유소용해와 출혈의 연관성에 관한 예비연구
윤승주 ( Seung Zhoo Yoon ),김종성 ( Chong Seong Kim ),이용헌 ( Yong Hun Lee ),허원석 ( Won Seok Heo ),김성협 ( Soong Hyop Kim ),이종환 ( Jong Hwan Lee ),임영진 ( Young Jin Lim ),장인진 ( In Jin Jang ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.53 No.6
Background: Fibrinolysis, which commonly occurs following cardiopulmonary bypass (CPB), may be related to the excessive bleeding (EB) and morbidity after CPB. It is known that tissue factor (TF), which is triggered by CPB, plays an important role in the initiation of fibrinolysis during and after CPB, however, EB and fibrinolysis after CPB show inter-individual variance. Therefore, in this study, TF -603A/G polymorphism was evaluated to determine if it is associated with fibrinolysis and/or EB and morbidity following CPB. Methods: RT-PCR was used to determine the TF genotype of each patient. In addition, the amount of blood loss that occurred during the first 24 hours following surgery was documented, and EB was diagnosed when more than 1 L of blood was lost during the first 24 hours following surgery. The D-dimer levels were measured at; a) Time 1; prior to initiation of CPB, b) Time 2; 2 hours after CPB, and c) Time 3; 24 hours after CPB. The oxygen index (OI) was calculated at; 1) OI1; upon admission to the ICU, b) OI2; 24 hrs after admission to the ICU, and c) OI3; 48 hrs after admission to the ICU. The intubation time and the length of the ICU stay were also documented. Results: The serum D-Dimer level of the TF -603AA group (n = 72) measured at time 3 was higher than that of the TF -603GG/GA group (n = 25) measured at the same time. In addition, the incidence of EB and the intubation time of the TF -603AA group were higher than those of the TF -603GG/GA group. Finally, the OI3 of the TF -603AA group was lower than that of the TF -603GG/GA group. Conclusions: The G allele that is associated with TF -603A/G polymorphism may be protective against fibrinolysis following CPB, therefore, it may also be protective against EB and morbidity following CPB. (Korean J Anesthesiol 2007; 53: 720∼6)
Choi, Yoon Ji,Lim, Jae Kwan,Park, Jeong Jun,Huh, Hyub,Kim, Dong-Joo,Gong, Chang-Hoon,Yoon, Seung Zhoo Cambridge Medical Publications Ltd 2017 The Journal of international medical research Vol.45 No.3
<P><B>Objective</B></P><P>The efficacy of chlorhexidine- and silver sulfadiazine-coated central venous catheters (CSS-CVC) against catheter-related infection remains controversial. We hypothesized that the loss of silver nanoparticles may reduce the antibacterial efficacy of CSS-CVCs and that this loss could be due to the frictional force between the surface of the CVC and the bloodstream. The objective of this study was to investigate whether the antimicrobial effect of CSS-CVCs decreases with increasing exposure time in a bloodstream model and quantitatively assay the antimicrobial effect of CSS-CVCs compared with polyurethane and antiseptic-impregnated CVCs.</P><P><B>Methods</B></P><P>Each CVC was subjected to 120 hours of saline flow and analyzed at intervals over 24 hours. The analyses included energy-dispersive X-ray spectroscopy, scanning electron microscopy, and optical density after a <I>Staphylococcus aureus</I> incubation test.</P><P><B>Results</B></P><P>The weight percentage of silver in the CSS-CVCs significantly decreased to 56.18% (44.10% ± 3.32%) with 48-hour catheterization and to 18.88% (14.82% ± 1.33%) with 120-hour catheterization compared with the initial weight percentage (78.50% ± 6.32%). In the <I>S. aureus</I> incubation test, the antibacterial function of CSS-CVCs was lost after 48 hours [3 (N/D) of OD]. Similar results were observed in a pilot clinical study using 18 CSS-CVCs.</P><P><B>Conclusions</B></P><P>We found that the efficacy of CSS-CVCs decreased over time and that the antibacterial function was lost after 48 hours of simulated wear-out. Therefore, antibiotic-impregnated CVCs may be a better option when longer (>48 hours) indwelling is needed.</P>
Analysis of EEG to quantify depth of anesthesia using Hidden Markov Model.
Kim, Junbeom,Hyub, Huh,Yoon, Seung Zhoo,Choi, Ho-Jin,Kim, Kwang Moo,Park, Sang-Hyun IEEE Service Center 2014 Conference proceedings Vol.36 No.-
<P>Real-time quantification of the patient's consciousness level during anesthesia is an important issue to avoid intraoperative awareness and post-operative side effects. A depth-of-anesthesia (DoA) monitoring method called Bispectral Index (BIS) is generally used for this purpose. However, BIS is known to be inaccurate at the transitory state, and also shows a critical time delay in quantifying the patient's consciousness level. This paper introduces a novel method to reduce the response time in the quantification process. This thesis develops a new index called HDoA by analyzing EEG using Hidden Markov Model. The proposed approach is composed by two steps, training and testing. In the training step, two HMM, awakened and anesthetized model are learned based on each training set. In the testing step, by evaluating the probability of producing the testing EEG from two models respectively, the index HDoA is derived. Since the evaluation of DoA using HMM is training based method, it have better performance with more training process. Experiments show that HDoA has a high correlation with BIS at a steady state, and outperforms BIS in two ways: (1) shorter delay time in transition state, and (2) higher Fisher Score. The validity of HDoA has been tested by 8 real clinical data.</P>
Case Report : Occurrence of iatrogenic pneumothorax during Laparoscopy-assisted distal gastrectomy
( Yun Hee Kim ),( Seung Zhoo Yoon ),( Choon Hak Lim ),( Ji Yong Park ),( Hye Won Lee ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.6
The occurrence of a pneumothorax during laparoscopy-assisted distal gastrectomy (LADG) is rare. A pneumothorax was developed during a LADG under general anesthesia in a 67-year-old woman with gastric cancer. About 140 minutes after CO2 insufflation, sudden hemodynamic collapse occurred. A defect was noted in the diaphragm. After immediate repair under laparoscopy, hemodynamic stability was achieved within several minutes. In the anesthetic management of a LADG, the anesthesia provider should be aware of the possible occurrence of a pneumothorax. (Korean J Anesthesiol 2009; 57: 765∼7)
Seong Hyop Kim,Seung Zhoo Yoon,Kyung Hee Koh,Jung Man Lee 조선대학교 의학연구원 2018 Medical Bilogical Science and Engineering Vol.1 No.2
Myocardial viability is one of important factors to determine clinical outcomes after off-pump coronary artery bypass grafting. We hypothesized that the revascularization of nonviable myocardium might show the different features of myocardial reperfusion postoperatively as compared with viable myocardium. Patients who underwent off-pump coronary artery bypass grafting for 2 years were retrospectively reviewed. Viable group (V group, n=159) and nonviable group (N group, n=24) were divided using preoperative single photon emissioncomputed tomography. The postoperative complication was evaluated by 1) occurrence of rhythm disturbance (atrial fibrillation/flutter or ventricular tachycardia), 2) use of continuous epinephrine, and 3) intra-aortic balloon pump insertion. Intubation time and intensive care unit (ICU) stay were also documented. Demographic data (gender, age, ejection fraction, and New York Heart Association [NYHA] classification) showed no difference. N group showed higher incidence of rhythm disturbance. Although intubation time showed no difference, ICU stay of N group was longer than V group. Revascularization of non-myocardium was associated with higher incidence of rhythm disturbance and longer ICU stay as compared with viable myocardium.