• Journal of Chest Surgery
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• 제26권3호
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• pp.163-169
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• 1993

This is the result of the annual statistic analysis of thoracic and cardiovascular surgical cases in 1992 Korea. Overall 17, 520 cases of surgery [11, 732 cases of thoracic surgery by 54 institutes / 5, 788 cases of cardiovascular surgery by 48 institutes] were done. 1. Tumor [N=2, 532] : Lung was the most frequently involved organ by tumor [54.9%],and the remainders were mediastinum [16.2%] / esophagus [14.8%] / chest wall [11.7%] / tracheobronchus [1.3%] / pleura [1.1%] in order. Of 1, 082 cases of primary lung cancer surgery,the frequency of cell type was squamous [62.6%] / adeno [21.6%] / small cell [7.1%] / large cell [2.7%]. Of 411 cases of mediastinal tumor surgery,the frequency of cell type was neurogenic [28.8%] / thymoma [27.6%] / teratoma [17.7%] / congenital cystic [17.2%]. Of 376 cases of esophageal tumor surgery,primary cancer were the most [85.4%]. 2. Infection [N=3, 157] : Pleura was the most frequently involved organ [59.0%],and the remainders were lung [31.3%] / chest wall [8.6%] / mediastinum [1.1%] in order. 3. Miscellaneous [N=6, 043] : Lung and pleural disease esp. pneumothorax [85.1%] was the most frequent surgical indication. The remainders were chest wall anomaly [3.4%] / benign esophageal disease [3.4%] / diaphragmatic pathology [2.4%] / myasthenia [1.4%] in order. Of 85 cases of thymectomy for myasthenia gravis,thymoma was noted in 58.8%. 1. Congenital heart disease [N=3, 363] : The ratio of noncyanotic to cyanotic heart disease was 3:1. Of 2, 516 cases of noncyanotic heart disease,the frequency of disease entity was VSD [44.1%] / ASD [26.0%] / PDA [19.4%] / PS [3.3%],and that of 847 cases of cyanotic heart disease was TOF [29.4%] / ECD [15.6%] / TGA [9.7%] / DORV [7.6%]. Overall mortalities were 2.1% in noncyanotic and 12.2% in cyanotic heart surgery. 2. Acquired heart disease [N=1, 929] : Of 1, 422 cases of valvular surgery,single mitral pathology was the most frequent candidate [48.0%],and total 1, 574 prosthetic valves which were mainly mechanical [95.6%] were used. Of 376 cases of coronary surgery,triple vessel was the most [35.9%],and the frequency of bypassing grafts was great saphenous vein [52.9%] / internal mammary artery [44.7%] / artificial vessel [2.4%]. Overall mortalities were 3.4% in valvular and 4.5% in coronary surgery. 3. Pericardium,Cardiac tumor,Arrhythmia,Aortic aneurysm,Assist device,and Pacemaker : There were no specific changes compared to previous survey1]. This nation-wide inquiry will be continued and reported annually by KTCS Society.

• 한국전산유체공학회지
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• 제21권1호
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• pp.103-109
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• 2016

With the rapid increase in the number of patients with cardiopulmonary diseases, more cardiopulmonary circulatory assist devices are also needed. These devices can be employed when heart and/or lung function poorly. Due to the critical role they take, these devices have to be designed optimally from both mechanical and biomechanical aspects. This paper presents the CFD results of a baseline model of a centrifugal blood pump for the ECMO condition. The details of flow characteristics of the baseline model together with the performance curves and the modified index of hemolysis(MIH) are investigated. Then, the geometry of baseline impeller and the volute are modified in order to improve the biomechanical performance and reduce the MIH value. The numerical simulations of two cases represent that when impeller radius and prime volume decrease the MIH value also decreases. In addition, the modified geometry shows more uniform pressure distribution inside the volute. The findings provide valuable information for further modification and improvement of centrifugal blood pumps from both mechanical and biomechanical aspects.

• Journal of Chest Surgery
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• 제30권12호
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• pp.1167-1174
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• 1997

저자들은 1991년부터 1996년까지 5년간 지연 흉골 폐쇄를 시행한 20명의 환자를 분석하고 추적 조사 하였다. 남녀비는 11:9였고 평균연령은 6.4개월(범위 7일-5년)이었다. 적응증으로는 개심술후 심근부종에 기인한장치한 불안정한 혈역학적 상태로 인한 것이 15례로 가장 많았고, 심폐기 이탈 불가로 심실 보조 장치를 경우에서가 3례, 폐동맥 밴딩술 후 저산소증으로 인한 것이 2례 등이었다. 흉골 봉합은 술후 평균 102시간(범위 4-213시간)에 이루어졌으며 시행 후 중심 정맥압의 유의한 상승이 관찰되었다. 종격 동염, 환부 감염 등은 없었으며 2례에서 패혈증이 관찰되었다. 5명이 사망하였고 생존환자 15명중 2명 이 술후 추적관찰 기간 중 사망하였다. 누적 생존률은 1년과 2년에서 각각 65.0%였다. 지연 흉골 봉합 은 혈역학적으로 불안정한 심장을 감압하는 좋은 방법이며 성공적인 결과를 얻기 위해서는 적응증에 대한 신중한 고려가 선행되어야 한다고 생각된다.