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RISS 인기검색어
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- 저자 : 김태훈(Kim, Tae Hoon) (검색결과 2,674 건)
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김태훈,유영훈,김형중,안철민,백효채,이두연,김상진,Kim, Tae-Hun,Yu, Yeong-Hun,Kim, Hyeong-Jung,An, Cheol-Min,Baek, Hyo-Chae,Lee, Du-Yeon,Kim, Sang-Jin 대한영상의학회 2003 대한영상의학회지 Vol.49 No.4
Purpose: To elucidate the sequential radiologic manifestations of reperfusion edema after lung transplantation. Materials and Methods: The study group comprised five consecutive lung transplant recipients (M:F=3:2; mean age; 47.5 years) who between July 1996 and April 2002 underwent lung transplantation procedures (four, unilateral; one, bilateral) at our institution. We retrospectively reviewed the serial postoperative radiographs obtained and characterized the lung infiltrates. Results: Lung infiltrates compatible with reperfusion edema were present in all patients (5/5). Reperfusion edema appeared on day 1 in four, and by day 2 in the other. In all transplanted lungs, infiltrates were found in the perihilar and basilar regions, and were scored as maximal on day 1 in one, day 3 in two, day 4 in one and day 5 in the other. Conclusion: The recognition of sequential radiological manifestations helps identify recognition of reperfusion edema after lung transplantation. 목적: 본 연구는 폐이식후 재관류부종의 시기에 따른 방사선적 소견을 기술하려고 한다. 대상과 방법: 본원에서 폐이식을 시행받은 5명의 수여자를 대상으로 하였다. 1996년 7월부터 2002년 3월까지 세 명의 남자와 두 명의 여자가 폐이식을 받았고, 평균 연령은 47.5세 였다. 이 중 4 명은 한쪽 폐만 이식을 받았고, 1명은 양폐 이식을 받았다. 모든 수술후 연속적인 수술후 방사선 사진을 분석하고, 폐음영을 기술 하였다. 결과: 재관류부종은 네 명에서는 수술후 1일째에 , 한 명에서는 2일째에 나타났다. 최대치의 폐음영은 한 명에서 수술후 1일에, 두 명에서 수술후 3일째에, 한 명에서 4일째에, 나머지 한 명은 술후 5일째에 있었다. 결론: 재관류부종은 모든 폐이식 이후에 일어나는 현상이며 방사선학적으로는 폐문주위와 하폐에 우세하게 분포하는 미세 망상형 또는 기강경화로 나타나며, 약 5일 이내에 최대 시기를 거치고 3주 이내에 특별한 치료없이 소실된다.
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히크만 카테터를 삽입한 소아 환자에서 발생한 합병증 분석
김태훈,김대연,조민정,김성철,김인구,Kim, Tae-Hoon,Kim, Dae-Yeon,Cho, Min-Jeong,Kim, Seong-Chul,Kim, In-Koo 대한소아외과학회 2010 소아외과 Vol.16 No.1
Hickman catheters are tunneled central venous catheters used for long-term venous access in children with malignancies. The appropriate management for various kinds of catheter related complications has become a major issue. We retrospectively analyzed the clinical, demographic, and surgical characteristics in 154 pediatric hemato-oncology patients who underwent Hickman catheter insertion between January 2005 and December 2009. There were 92 boys and 62 girls. The mean age at surgery was $7.6{\pm}5.1$ years old. The mean operation time was $67.4{\pm}21.3$ minutes and C-arm fluoroscopy was used in 47(30.5 %). The causes of Hickman catheter removal were termination of use in 82 (57.3 %), catheter related bloodstream infection in 44(30.8 %), mechanical malfunction in 11(7.7 %), and accidents in 6(4.2 %). Univariate and multivariate analysis for associated factors with catheter related bloodstream infection showed that there were no statistically significant associated factors with catheter related infection complications. All cases except two showed clinical improvement with catheter removal and relevant antibiotics treatment. The mean catheter maintenance period in patients of catheter removal without complications was $214.9{\pm}140.2$ days. And, The mean catheter maintenance period in patients of late catheter related bloodstream infection was $198.0{\pm}116.0$ days. These data suggest that it is important to remove Hickman catheter as soon as possible after the termination of use. When symptoms and signs of complications were noticed, prompt diagnostic approach and management can lead to clinical improvements.
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소아외과 영역의 선천성 응급 질환에서 산전 진단이 술후 사망률에 미친 영향
김태훈,이성철,김현영,정성은,박귀원,김우기,Kim, Tae-Hoon,Lee, Seong-Cheol,Kim, Hyun-Young,Jung, Sung-Eun,Park, Kwi-Won,Kim, Woo-Ki 대한소아외과학회 2004 소아외과 Vol.10 No.2
As prenatal ultrasonography becomes popular, the number of prenatal diagnosis of congenital surgical diseases is also increasing. To evaluate the impact of antenatal ultrasonography on outcome the mortality rate in neonatal surgical emergencies was studied. The authors retrospectively reviewed 281 patients (congenital diaphragmatic hernia: 44, tracheoesophageal fistula: 78, intestinal atresia: 98, omphalocele: 28 and gastroschisis: 33 who had been managed at Seoul National University Childrens Hospital, from January 1991 to December 2000. The patients were divided into two groups; group A (1991 to 1995; 139 patients) and group B (1996 to 2000; 142 patients). These two groups were subdivided into prenatally diagnosed subgroup and postnatally diagnosed subgroup. We analyzed the changes of prenatal diagnosis rate, total mortality rate, and mortality rate of subgroups. Prenatal diagnosis rate was increased significantly in group B (Group A: 24.5 % and Group B: 45.1 %). Total mortality rate of group A was 21.6 %, and that of group B was 10.6 %, showing a significant decrease in group B. However, in both group A and B, when compared antenatally diagnosed subgroup with postnatally diagnosed subgroup, the mortality rate was lower in postnatally diagnosed subgroups but statistically not significant. The authors conclude that although prenatal diagnosis rate has been increased, prenatal diagnosis itself has not resulted in significant improvement in outcome.
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김태훈,조민정,김대연,김성철,김인구,Kim, Tae-Hoon,Cho, Min-Jeong,Kim, Dae-Yeon,Kim, Seong-Chul,Kim, In-Koo 대한소아외과학회 2011 소아외과 Vol.17 No.1
Currarino syndrome is a hereditary syndrome characterized by the triad of a sacral bony defect, presacral mass and anorectal malformation. We retrospectively reviewed 13 Currarino syndrome patients who were treated in our center between 1997 and 2010. Demographic data, initial symptoms, initial diagnosis. pathologic diagnosis of presacral mass, associated anomalies and managements were analyzed. There were 8 boys and 5 girls. Four patients were diagnosed as Currarino syndrome immediately after birth with failure of passage of meconium and abdominal distension. Four patients underwent surgery for imperforate anus immediately after birth and W8re diagnosed as Currarino syndrome later and underwent reoperation. Three patients were diagnosed during work-up and management with of the tentative diagnosis of Hirschsprung's disease. Diagnosis of the remaining two patients was at the age of 26 months and 9 years and anorectal malformation was not associated. Twelve patients showed hemi-sacrum and one patient showed bilateral sacral subtotal agenesis. Two patients without anorectal malformation underwent presacral mass excision, untethering of spinal cord and repair of myelomeningocele. Six out of 8 patients, excluding 3 that expired or were lost to follow up, with anorectal malformation underwent colostomy, presacral mass excision, untethering of spinal cord, repair of myelomeningocele, posterior sagittal anorectoplasty and colostomy repair. One patient underwent only posterior sagittal anorectoplasty after colostomy. One waits the scheduled operation only with Hegar dilatation. Pathologic examation of presacral masses showed myelomeningoceles in 4 patients, lipomyelomeningoceles in 3 patients and dermoid Cyst in one patient. Teratoma was combined in 2 patients. Eight patients needed neurosurgical operation for spinal cord problems. Seven patients had urologic anomalies and two of them underwent operation. Currarino syndrome should be considered as a differential diagnosis in pediatric patients with abdominal distension, constipation and anorectal malforlnation. For proper evaluation and treatment, a multi-disciplinary approach is recommended.
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체외막 산소화 요법을 적용한 선천성 횡격막탈장 치료의 초기 경험
김태훈,조민정,박정준,김대연,김성철,김인구,Kim, Tae-Hoon,Cho, Min-Jeng,Park, Jeong-Jun,Kim, Dae-Yeon,Kim, Seong-Chul,Kim, In-Koo 대한소아외과학회 2011 소아외과 Vol.17 No.2
Extracorporeal membrane oxygenation (ECMO) has been utilized in congenital diaphragmatic hernia (CDH) patients with severe respiratory failure unresponsive to conventional medical treatment. We retrospectively reviewed 12 CDH patients who were treated using ECMO in our center between April 2008 and February 2011. The pre ECMO and on ECMO variables analyzed included gestational age, sex, birth weight, age at the time of ECMO cannulation, arterial blood gas analysis results, CDH location, timing of CDH repair operation, complications and survival. There were 9 boys and 3 girls. All patients were prenatally diagnosed. Mean gestational age was $38.8{\pm}1.7$ weeks and mean birth weight was $3031{\pm}499$ gram. Mean age at the time of ECMO cannulation was $29.9{\pm}28.9$ hours. There were 4 patients who survived. Survivors showed higher 5 min Apgar scores ($8.25{\pm}0.96$ vs. $7.00{\pm}1.20$, p=0.109), higher pre ECMO mean pH ($7.258 {\pm}0.830$ vs. $7.159{\pm}0.986$, p=0.073) and lower pre ECMO $PaCO_2$ ($48.2{\pm}7.9$ vs. $64.8{\pm}16.1$, p=0.109) without statistical significance. The hernia was located on the left side in 10 patients and the right side in 2 patients. The time interval from ECMO placement to operative repair was about 3~4 days in 5 early cases and around 24 in the remaining cases. There were 3 cases of post operative bleeding requiring re operation and 2 cases of abdominal compartment syndrome requiring abdominal fascia reopening. ECMO catheter reposition was required in 4 cases. Three cases of arterial or venous thrombosis were detected and improved with follow up. Our data suggests that ECMO therapy could save the lives of some neonates with CDH who can not be maintained on other treatment modalities. Protocolized management and accumulation of case experience might be valuable in improving outcomes for neonates with CDH treated with ECMO.
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환상지방족 Isocyanate(H<sub>12</sub>MDI)와 n-Hexanol의 반응속도론
김태훈,박성엽,박성훈,Kim, Taehoon,park, Sungyurb,Park, Sunghoon 한국공업화학회 1998 공업화학 Vol.9 No.7
우레탄 생성반응의 동역학을 조사하기 위해 지방족 이소시아네이트인 4,4'-dihexyl methane diisocyanate($H_{12}MDI$)와 1 관능기 알코올인 n-hexanol간의 반응을 실험적 측정과 수학적 모델링을 통해 연구하였다. 실험은 dibutyltin dilaurate(DBTDL)을 촉매로, 톨루엔을 용매로 온도, 촉매농도, [NCO]/[OH] 비 등을 변화시키면서 실시하였고, 반응동역학은 NCO기와 OH기의 반응에 의한 우레탄 생성반응 및 NCO기와 우레탄간의 반응에 의한 allophanate 생성반응 등 2가지 2차반응식으로 모사하였다. 반응속도상수는 Runge-Kutta 4th order 방법에 의한 전산모사방법으로 계산하였다. 대부분의 조건에서 실험치와 계산치가 잘 일치하여 본 연구에서 제안하는 반응 모델과 속도상수 계산방법이 적절함을 알 수 있었다. 또한 NCO기 90% 전환율에서 allophante/urethane의 비를 계산하였는데 대부분의 조건에서 20% 이상의 높은 값이 얻어져 allophanate 생성반응이 우레탄 물성에 중요한 영향을 미칠 수 있음을 알 수 있었다. Reaction kinetics between 4,4'-dihexyl methane diisocyanate($H_{12}MDI$) and n-hexanol in toluene with dibutyltin dilaurate(DBTDL) as catalyst was studied by experimental measurements and mathematical modeling. Experiments were carried out at various temperatures, catalyst concentrations and [NCO]/[OH] ratios, and the reaction kinetics were described by two second-order reactions, the one between NCO and OH leading to urethane and the other between urethane and NCO leading to allophanate. The rate constants were estimated by the Runge-Kutta 4th-order method. Experiments and mathematical simulations showed a good agreement for various experimental conditions. The [allophanate]/[urethane] ratios at 90% conversion of initial NCO were estimated to be over 20% for most conditions employed in the present study, indicating that allophanate formation might significantly affect the properties of urethane polymers.
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김태훈,정진섭,Kim, Taehoon,Jeong, Jinseob 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.6
For performance improving of C-band radar altimeter used in a missile system, Ku-band radar altimeter is developed. To utilize the time delay devices which are used in testing C-band radar altimeter, we proposed C-band and Ku-band frequency conversion method and implemented it as a part of missile system test equipment. In this paper we present design contents, development results and test application results of radar altimeter test equipments.
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