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강성준(Seong Joon Kang),노병선(Byoung Seon Rhoe),윤광수(Kwang Soo Yoon),유수영(Soo Young Yoo),김민영(Min Young Kim) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.1
N/A During the eight-year period from January, 1980 through December, 1987 thirty four cases of infantile hypertrophic pyloric stenosis were surgically treated at the Department of Surgery, Yonsei University Wonju College of Medicine. Non-bile stained projectile vomiting was present in all cases and began 2-4 weeks after birth in most cases. The visible gastric peristalsis was found in 23 of total 34 cases and the olive-shaped mass was palpated in 29 cases. Ramstedt pryloromyotomy underwent in all cases. Five of them had duodenal perforation recognized during the operation. All patients had uneventful postoperative course except three. One of them had pneumonia, another one had wound dehescience and the other one died of malnutrition and penumonia because he entered the hospital 16 weeks after the symptoms had developed. Infantile hypertrophic pyloric stenosis had normally excellent prognosis as the operation is carried at the proper time. If the diagnosis is delayed until serious problems like malnutrition and acid-base imbalance develop, operative morbidity and mortality would increase.
강성준(Seong Joon Kang),김대성(Dae Sung Kim),김수용(soo Yong Kim),유수영(Soon Young Yoo),오진환(Jin Whan Oh),김기영(Kim Young Kim) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.1
Six neonates of gastric perforation between January 1986 and December 1989 were surgically treated. All perforations occurred within the first week of life. The most common symptom of the gastric perforation was sudden abdominal distention. Plain abdominal roentgenogram was most helpful to diagnose the gastric perforation. One of six patients had a round perforation thought to be stress ulcer in the pylorus and five had linear perforations, measuring 0.5~5 cm in length, in the greater curvature of the upper body. One of them had duodenal obstruction due to midgut volvulus and the other four had no definite etiology of the perforation. These five neonates except one with stress ulcer perforation showed similar histologic findings of muscular deletion in the surrounding gastric wall. Debridement and simple suture of the perforation was done in 5 patients and one had partial gastrectomy. The mortality occurred in two of six. Prematurity and low birth weight were significant factors of the mortality.
강성준(Seong Joon Kang),노병선(Byoung Seon Rhoe),김수용(soo Yong Kim),이연희(Yeon Hee Lee),이창일(Chang Il Lee) 대한소화기학회 1993 대한소화기학회지 Vol.25 No.1
N/A Despite the support provided by adjuncts such as total parenteral nutrition, effective antibiotic. and hemodynamic monitoring, esophageal perforations continue to be associated with a mortality rate of more than 20%. In an effort to refine and improve treatment, we reviewed 6 cases of esophageal perforations from January, 1983 to August, 1992. The prevalent age group was 4th to 6th decades. The perforation site was cervical (2), thoracic (1) and distal (3). Clinical findings were fever, pain, dysphagia, and subcutaneous emphysema in cervical esophageal perforations compared with chest pain and epigastric pain in thoracic or distal esnphageal perforations. Causes of esophageal perforation were trauma, 2 cases, in cervical region and spontaneous rupture (Boerhaave syndrome), 4 cases in thoracic and distal region. Preoperatively, we performed simple neck and chest X-ray, esophagoscopy, fiberoptic gastroscopy (FGS) and esophagogram. Mortality was developed in 2 cases (33.3%p) and its causes were sepsis due to mediastinitis with delayed aclmission. In operative management, we recommed primary repair and drainage in cervical esophageal perforation. But in thoracic and distal esophageal perforation, the repair site should be butressed with viable serosal butress such as pleura and pericardium, if possible, to prevent subsequent leak at the suture line. 1n conclusion, early diagnosis and early operation is easential for patients with spill of contrast medium on esophagograms of clinical manifestations of esophageal soilage of the mediastinum or pleural cavities.
공진주파수 스펙트럼법을 이용한 Composite Resonator 구조에서 압전박막의 특성 평가에 대한 연구
최준영,장동훈,강성준,윤영섭,Choi Joon Young,Chang Dong Hoon,Kang Seong Jun,Yoon Yung Sup 대한전자공학회 2005 電子工學會論文誌-SD (Semiconductor and devices) Vol.42 No.1
공진주파수 스펙트럼법을 이용하여 ZnO 와 AIN 압전박막의 임피던스 특성 및 전기기계결합계수 특성에 대해 조사하였다. 압전박막의 두께가 얇을수록 전체적인 임피던스 응답 피크의 크기가 감소하였으며, 기판의 두께가 얇을수록 응답 피크의 모드 수가 감소하는 것이 관찰되었다. 입력 Kt² 값으로부터 평가된 Kt² 값을 통해 압전박막의 두께보다 기판의 두께 변화에 대한 영향이 더 큼을 알 수 있었고, 기판의 acoustic 임피던스에 의해서도 Kt² 값이 감소함을 알 수 있었다. 전극 효과가 첨가되면 임피던스 응답 피크의 크기가 감소하였으며, 전극의 acoustic 임피던스가 커짐에 따라 응답피크는 더 작아졌다. 공진주파수 스펙트럼법에서 전극은 질량부하로 고려되기 때문에 전극 효과가 첨가된 경우 Keff² 값은 증가하며, 전극의 acoustic 임피던스가 크면 그 효과는 더 커졌다. 공진주파수 스펙트럼법을 이용한 시뮬레이션을 통해 기판, 압전체, 전극으로 이루어진 composite 공진기의 특성 분석과 설계까지도 가능함을 알 수 있었다. We studied the characteristics of impedance and electromechanical coupling coefficient in ZnO and AIN thin films by using resonance frequency spectrum method. The response peak of impedance decreased with the decrease of thickness of piezoelectrics, the number of mode of response peak decreased with the decrease of substrate thickness. An error of Kt² estimated from input Kt² increased as the thickness of piezoelectrics decreased and the thickness of substrate increased. Also, the error was increased in case of a large acoustic impedance of substrate. It was found that the composite resonator operating in optimized condition could be designed through the resonance frequency spectrum analysis of composited resonator consisted of piezoelectric thin film and substrate.
담도 결석 수술후 잔류 담석 제거에 이용되는 담도경의 효용
이문형(Moon Hyung Lee),강성준(Seong Joon Kang),김세환(Sae Whan Kim) 대한소화기학회 1984 대한소화기학회지 Vol.16 No.2
N/A Direct visualization of the biliary tree using flexible fiberoptic choledochoscope has been recommended as a technique to improve the accuracy of common bile duct exploration and to extract the postoperative retained stones. In several series. the incidence of retained stone has dramatically decreased after using the choledochoscope. Recently, there is increasing tendency to depend upon chnoledochoscope for removal of retained or recurrent biliary tract stones. Moss, Birkett, and Yamakawa reported removal of a retained stone using a choledcochoscope passed through the T-tube tract. At the department of Surgery, Wonju MIedical College, Yonsei University, authors report successful extraction of retained stones in 15 patients between February 1983 and August 1984 with flexible fiberoptic choledochoscope passed through the T-tube tract. In using the choledochoscope, we concluded that the major factors for successful extraction of retained stones are the diameter and the location of the T-tube tract. There were no significant complications after postoperative choledochoscopy. Therefore, it is strougly recomended choledochoscopic removal of retained stone is the approach of choice before reoperation.
갑상선 수술 환자에서 세침흡인 세포검사와 조직검사와의 연관성
백종범,김성철,배금석,강성준,Jong Beom Baek,M.D.,Sung Chul Kim,M.D.,Keum Seok Bae,M.D. and Seong Joon Kang,M.D. 대한갑상선-내분비외과학회 2009 The Koreran journal of Endocrine Surgery Vol.9 No.4
Purpose: Fine needle aspiration cytology (FNAC) has become a standard diagnostic tool for thyroid nodules. The purpose of this study is to analyze the correlation between FNAC and the final histology to improve the diagnostic value. Methods: We collected 792 patients who had undergone thyroidectomy, and we selected 549 patients who had undergone preoperative FNAC. The FNAC results were classified as non-diagnostic, malignancy, indeterminate and benign. The final pathologic reports were classified into two categories: malignant or benign. The individual histology was also identified. We retrospectively analyzed the pathologic result, the sensitivity, the specificity and the predictive value of the FNAC. Results: Among 549 patients, their FNACs showed 47 non diagnostic results, 189 malignancies,136 indeterminate results and 177 benign results. The false positive rate was 1.1% and the false negative rate was 12.9%. The final pathology reports were 262 malignancies and 287 benign lesions. There were 42 (30.9%) malignancies among the 136 indeterminate cases. Adenomatous hyperplasia was the most common benign lesion and papillary carcinoma (containing micropapillary carcinoma) was the most common benign lesion. Conclusion: FNAC is an easy and safe diagnostic tool, but it still has many limitations. It is necessary to reduce the number of non diagnostic results. Technical advances, classification of the advanced categories of cytology and other staining methods can provide more specific results, and this can reduce the rate of performing unnecessary surgery. (Korean J Endocrine Surg 2009;9:223-227)