Catenary 곡면을 갖는 막구조물의 치환기법에 관한 연구

임채욱,송평훈,김승덕,송호산 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Membrane structure systems and cable net structure systems are attracting people's attention as they are used in many buildings because of their light materials and airy appearances. If a membrane structure system or a cable net structure system does not have sufficiently high initial stiffness, it may be in unstable state. But if the initial stiffness is secured, the system will be in stable state. In this study the nonlinear finite element formulae for membrane and cable members considering geometric nonlinearity is derived, and then a catenary's membrane structure, and a tension membrane structure by Nass(Nonlinear Analysis for Spatial Structures) program is analyzed. The suitable scheme, which membrane structure are assigned by cable elements for overcoming the unfitted shape problem, is shown that the section of cable is assigned by element's area.

전이성 폐암의 외과적 치료

임승평 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2

From July 1987 to July 1993, four patients received pulmonary resection for pulmonary metastasis from carcinoma or sarcoma at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital. There were 2 males and 2 females and their respective ages were 38, 68, 35 and 23 years. The primary tumors were Ewing's Sarcoma, Adenocarcinoma, Synovial Sarcoma and Adenoid Cystic Carcinoma and their sites were tibia(Lt), stomach, tibia(Rt) and submandibular salivary gland(Lt), respectively. The disease free intervals were 41, 31, 0 and 24 months, respectively. The operative procedures were 2 lobectomies, 1 segmentectomy and 1 wedge resection. The durations the of follow-up after operation for pulmonary metastasis were 18, 11, 21 and 15 months, respectively.

비청색증 선천성 심장질환의 임상적 고찰 : 심실중격결손증 42예 분석 Analysis of 42 Cases of Ventricular Septal Defect

임승평 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

A clinical analysis was Performed on 42 cases of ventricular septal defect experienced at Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital daring 2.5 years period from April, 1983 to September, 1985. Of the 42 patients of ventricular septal defect, 29 patients were male and 13 patients were female and and ages ranged 1.4 years to 23 years old with the average age of 9.3 years. The chief complaints on admission were dyspnea on exertion (66.7%), frequent respiratory infection (59.5%%) and palpitation (16.7 %). Electrocardiographic findings were as follows: LVH 16(38.1%), BVH 12(28.9%) and RVH 4(9.5%). Cardiac catherizations were performed in 42 patients and mean Q_p/Q_s was 1.9 and mean systolic pulmonary artery pressure was 51.9 mmHg. 16 associated cardiac anomalies were found in 14 patients; Patent Foramen Ovale 5, Atrial Sectal Defect 3, Patent Ductus Arteriosus 3. Aortic Regurgitation 2, Mitral Regurgitation 1, Double Outlet Right Ventricle 1 and Left Superior Vena Cava 1. In anatomical classification by Kirklin, Type Ⅰ constituted 10 cases(23.8%), Type Ⅱ 30(71.4%) and Type Ⅲ 2(4.8%). Mean extracorporeal circulation time was 55.4min. and mean aortic cross clamping time was 36.7min. and varied by closing method and associated anomalies as in cases of primary closure closure, 37.5min. and 23.7min. and in cases of patch closure, 73.2min and 49. 8min., respectively. Postoperative complications were wound infecton 4, respiratory failure 3, residual shunt 3, epididymitis 1 and overall mortality rate was 4.8%(2 cases).

개심술후 감염예방에 대한 TIENAM^�의 임상 효과

임승평 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.1

A comparative study for the prophylactic effect of TIENAM was performed on 20 patients receiving cardiac value replacement. There were statistical differences in leukocyte counts between control group and experimental (TIENAM using) group, especially on the operative day and on the fifth postoperative day. In experimental group, leukocyte count returned to normal range within three days after operation however, it remained out of normal range even beyond the fifth postoperative day in control group. There was no statistical significance in renal function study(BUN, Cr.) between two groups. There was no significant clinical side effect relating to TIENAM, except for a mild, transient erythema around the injection site.

심방중격결손증의 외과적 치료

임승평 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.1

Twenty five patients with atrial septal defect operated on from May, 1983 to January, 1986, at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital, were analysed retrospectively. Among the 25 patients of atrial septal defect, 7 were male and 18 were female. Their ages ranged from 4.6 years to 52.5 years old with the mean of 14.5 years. The main clinical symptoms on admission were exertional dyspnea (84%), frequent respiratory infection (76%), palpitation (52%), easy fatigability (24%). Electrocardiographic findings were as follows: Regular sinus rhythm (100%), RVH (56%), RBBB (24%) and first degree A-V block (4%). Hemodynamic study was performed in all cases and mean pulmonary systolic arterial pressure was 36.1±12.6mmHg. and mean Qp/Qs was 2.3±0.6. All 25 patients were operated on under direct vision using extracorporeal circulation. 21 cases were secundum type defect and a single hole was found in 20 cases. 10 associated cardiovascular anomalies were found 8 patients.: ventricular septal defect in 3, patent ductus arteriosus in 1, partial anomalous pulmonary venous drainage in 2, mitral regurgitation in 1, tricuspid regurgitation in 1, anomalous left atrial septation in 1 and valvular pulmonary stenosis in 1. The defects closed directly in 21 cases and with patches in 4. Postoperative complications were wound infection 2, arrhythmia 2, bleeding 1, intracardiac patch detachment 1, pneumothorax 1, urethral injury 1 and hoarseness 1. But there was no operative mortality,

식도 Achalasia의 외과적 치료

임승평 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2

From October, 1978, 10 patients with esophageal achalasia underwent Modified Heller’s myotomy at Chungnam National University Hospital. There were 2 male and 8 female patients ranging between 9 year and 58 years old. The most frequent symptom was dysphagia followed by regurgitation of indigested food materials and it’s duration was variable from 3 months to 10 years. The preoperative evaluation was done with clinical symptoms and radiological examination. Modified Heller’s myotomy was performed through a transthoracic incision in 8 and a transabdominal incision in 2. No additional antireflux procedures were applied to all cases and there was no reflux esophagitis on follow-up period.

動脈管開存症의 外科的 治療

林承平 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.2

A Clinical analysis was performed on 94 cases of patent ductus arteriosus treated surgically during the period of 10 years from Aug. 1977 to Aug. 1987. at the Department of Thoracic and Cardiovascular Surgery, Chungnarn National University Hospital. Among 94 cases, male was 37 and female was 67 and ages ranged 12 days to 27 years old with the average of 7 ^11/12 years. The major clinical symptoms on admission were frequent respiratory infection (64.9%), dyspnea on exertion (37.2%) and palpitation (14.9%). On auscultation, continuous machinery murmurs were detected in 80 cases (85.1%) and loud systolic murmurs were detected in 14 cases (14.9%). Preoperative electrocardiographic findings were as follows: LVH 46 (48.9%), RVH 9 (9.6%), BVH 13 (13.8%) and WNL 26 (27.7%). Radiographically, there were increased pulmonary vaseularity in 86 (91.5%) and cardiomegaly in 64 (68.1%). Cardiac catheterizations were performed in 70 cases and meam systolic pulmonary arterial pressure was 47.2±24.3 mmHg and mean Qp/Qs was 2.39±1.05. Methods of operation were multiple ligation in 76, division in 10 and trans-pulmonary arterial repair using cardiopulmonary bypass in 8. Complications were recannalization in 2, temporary hoarseness due to left recurrent laryngeal nerve paralysis in 3 and respiratory distress in 1 and overall mortality rate was 1% (1 case).

개심술에 의한 승모판막교련절개술의 임상적 고찰

임승평 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

A clinical analysis was performed on 30 cases of mitral stenosis received open mitral commissurotomy during the period of 5 years from April 1983 to April 1988 at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital. Among 30 cases, male was 8 and female was 22 and ages ranged between 17.3 years and 53.2 years old with the average of 37.5 years. The major clinical symptoms on admssion were dyspnea on exertion, palpitation, hemoptysis and chest pain in order, with the average duration of 7.3 years. The preoperative electro cardio graphic findings were RVH(21 cases), LAE(17 cases) and atrial fibrillation (10 cases). The cardiac catherization were performed in 27 cases and mean systolic pulmonary arterial pressure was 56.52+26.43mmHg and mean pulmonary artery wedge pressure was 26.29±10.44 mmHg. Intraoperatively, there were 5 cases of left atrial thrombosis, but there was no postoperative complication. Overall, functional results were excellent after surgery, with 29 cases returning to New York Heart Association functional class I or Ⅱ initially.

성인에서 선천성 심장질환의 외과적 치료

임승평 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

A clinical analysis was performed on 182 cases of patients over 15 years of age who have undergone surgical correction of congenital cardiac malformation during the period of 8_1/2 years from April 1983 to November 1991, at the Department of Thoracic and Cardiovascular Surgery, Chungnam National University Hospital. During this period, 182 adult patients(27.3%) with a variety of congenital cardiac malformations, 148 acyanotic lesions and 34 cyanotic lesions, were operated on. Among them, male was 82 and female was 100. There were 67 patients under 20 years of age, 44 between 21 and 25 years, 21 between 26 and 30 years, 21 between 31 and 35 years, 10 between 36 and 40 years and 19 over 41 years. The most common anomaly was atrial septal defect which accounted for 61 cases(33.5 %) and other common anomalies were ventricular septal defect(29 cases, 16.0%), patent ductus arteriosus(29 cases, 16.0%) and tetralogy of Fallot(22 cases, 12.1%) in order of incidence. Overall operative mortality was 4.9%(2.0% in a cyanotic group and 17.7% in cyanotic group) in compare with 6.7% of total cases of congenital heart diseases during the same period. In conclusion, congenital heart disease in adults can be corrected with a satisfactory outcome, therefore an aggressive surgical approach should be mandatory.

종격동 종양의 임상적 고찰

임승평 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

A clinical analysis was performed on 55 cases of primary mediastinal tumors proved histopathologically, either resection or biopsy, from August 1977 to November 1990, at the Department of Thoracic and Cardiovascular Surgery, Chung-nam National University Hospital. Among 55 cases, mlae was 24 and female was 31 and ages of patients were ranged between six months and 67 years old with average 31.1 years. The primary tumors included neurogenic tumors (41.8%), teratomas(21.8%), thymomas(14.5%), benign cysts(10.9%) and a miscellaneous group. The posterior mediastinum was the most commonly involved site of a primary mediastinal tumor (49.1%), followed by the anterosuperior mediastinum(40.0%) and the middle mediastinum(10.9%). The most frequent histopathologic types of the primary mediastinal tumor were teratoma and thymoma in the anterosuperior mediastinum, benign cyst and teratoma in the middle mediastinum and neurogenic tumor in the posterior mediastinum. Malignant neoplasms were present in 11 patients(20.0%). Symptoms were present in 63.5% of the patients and included chest pain or discomfort(23.6%), dyspnea(14.6%), cough(7.3%), neck mass, ferquent URI and generalized weakness. 30.1% of the lesions in symptomatic patients was malignant. 49 cases of the patients(89.1%) were treated with complete resection, two cases with partial resection and four cases were biopsied only. Among 11 patients with malignant lesions, five patients received postoperative chemotherapy, two patients received irradiation, two patients received chemotherapy and irradiation and two patients refused further postoperative adjuvant therapy. Postoperative complications were bleeding, Horner's syndrome, pleural effusion and sympathetic nerve injury in five patients and there have been no surgical mortality.