흉부 둔상에 의한 하행대동맥 파열

이철세 최신의학사 1995 最新醫學 Vol.38 No.1

Polytetrafluoroethylene 인조혈관을 이용한 동맥재건술: 3례 보

이철세 대한흉부심장혈관외과학회 1984 Journal of Chest Surgery (J Chest Surg) Vol.17 No.4

After the real birth of vascular surgery occurred with the introduction of the first practical arterial prosthesis about 50 years ago, a variety of potential vascular graft had been tested and rejected. Polytetrafluoroethylene [Teflon, PTFE] was first used as a vascular prosthesis in 1957. Thereafter this pros-thesis was first used clinically in 1972 and has subsequently been widely applied as a small and medium sized vessel replacement because it is easy to use and readily available. There are numerous reports of good results about Polytetrafluoroethylene graft. We experienced the three cases of arterial bypass graft using polytetrafluoroethylene vascular pros-thesis. First, 21 years old female patient had suffered from Takayasus disease which affected the left subclavian artery and right subclavian-left axillary extra anatomical bypass graft as done. Second, 64 years old male patient had suffered from Leriche syndrome for 12 years and the left axillofemoral and femorofemoral extra anatomical bypass graft was done. Third, 34 years old male patient had suffered from recurrent Buergers disease which affected the left popliteal artery and the isolated popliteal artery segment bypass graft was done. Relatively satisfactory result was obtained in early post-operative period in all three cases.

매독성 대동맥루: 1 수술 치험예

이철세 대한흉부심장혈관외과학회 1982 Journal of Chest Surgery (J Chest Surg) Vol.15 No.4

The incidence of syphilitic aortic aneurysm was decreased now a day. The predilection site of cardiovascular syphilis is the thoracic aorta, especially ascending portion. The form of syphilitic aneurysm is characterized by saccular or fusiform. We have experienced 58 year old female complained of intermittent left chest pain for these 2 years. Saccular aneurysm of 7 cm in diameter at the descending thoracic aorta just distal to the left subclavian artery was confirmed with aortogram, and etiologic lesion was suspected as syphilis by her strong positive finding of serum VDRL test. Excision of the aneurysm was done under temporary bypass with heparinized 10mm silicone bypass cannula, and 23 mm Dacron aortic prosthetic graft in 10 cm segment was replaced, and excised aortic segment was confirmed as syphilitic aneurysm on light microscopic examination. Postoperative hospital course was uneventful, and discharged 3 weeks after operation in good normotensive condition. The patient died of CVA 3 months after discharge at home.

대동맥축착증4례 보고

이철세 대한흉부심장혈관외과학회 1983 Journal of Chest Surgery (J Chest Surg) Vol.16 No.1

좌심실에 발생한 진성심실류 (2례 보고)

이철세 대한흉부심장혈관외과학회 1983 Journal of Chest Surgery (J Chest Surg) Vol.16 No.2

Ventricular aneurysm which was first described by John Hunter on 18th century, has been experienced by many surgeons after successful using of cardiopulmonary bypass by Cooley on 1958. According to Gorlin, the definition of ventricular aneyrysm is portion of the ventricle which is not motile at systole (akinesis) or which has paradoxical dilatation at systole(dyskinesis). The ventricular aneurysm is classified to anatomical and functional. The anatomical ventricular aneurysm is devided into true or false again. Average age incidence is ranged from 49 to 60 and male predominance is reported. The cause is ischemic coronary artery disease in almost cases but hypertropoc cardiomyopathy, congenital abscence of myocardium, complication after mitral valvular replacement and trauma may also cause the ventricular aneurysm. Angina pectoris and congestive heart failure are most common clinical manifestations Ventricular tachycardia and systemic embolization are also complained. Using cardiopulmonary bypass, aneurysmectomy alone or combination with coronary artery revasculization are currently done for surgical treatment with steady improvenment of mortality. The first patient was 33 years old man who had true type of ventricular aneurysm on inferior wall the left ventricle near apex with protruded huge organized thrombus. The thromboembolic phenomenon was noted on both lower extremities. Under cardiopulmonary bypass, aneurysmectomy and thrombectomy were done. The aneurysmal orifice was repaired with Teflon buttless suture. The second patient was 30 years old female who had large true type of ventricular aneurysm on inferior wall of the left ventricle. Under cardiopulmonary bypass, aneurysmectomy with repair of aneurysmmal orifice defect by means of double layered Dacron patch was done with reinforce by outer silastic sheet covering. She was discharged from hospoital at post op. 15th day uneventfully.

集合群에서의 元素 抽出에 관한 연구

이철세 培材大學校 1985 論文集 Vol.7 No.-

There are some sets that comprise a large number of elements. Here a trial to sort out every element from each set is given with the expectation that the only element of a random at be left by gradual removing all the other element within each set. We can sort out a random amount of elements from a random set at once. Under such conditions, we can find out the character of groups that can be removed to obtain the above result only by even turns, but make it impossible by odd turns.

Litium-Borosilicate 유리계의 Mossbauer 효과와 전기적 성질

김영민,홍치유,윤인섭,이철세 동국대학교 자연과학연구소 1990 자연과학연구 논문집 Vol.10 No.-

본 연구에서는 Litium-borosilicate glasses에서 network former 들의 함량변화에 따른 전기 전도현상을 전기전도도와 Mossbauer spectrum을 통해 조사하였다. Glass network former들의 함량변화는 전기전도도에 영향을 미치지 않으며, NBO 분포의 변화도 관측되지 않았다. Electric transfort properties of Litium-Borosilicate glasses depending on contents of glass network formers were studied by electric conductivity and Mossbauer spectroscopy. The change of contents of network formers did not influenced on electric conductivity and also any change of NBO's distribution was not observed.

혈액투석 3년의 경험

김선주,송병상,표석주,홍세용,오도연,현창옥,김정목,이철세 순천향대학교 1987 논문집 Vol.10 No.2

We describe here our experience with clinical hemodialysis in 44 patients at Chun-Ahn Soonchunhyang Hospital. The results were as follows : 1. Dyspnea(33.3%) and edema(30.8%) were common intial symptoms. 2. Underlying diseases were unknown in majority(65.8%). Glomerulonephritis(12.5%) and diabetes mellius(9.4%) revealed common diseases causing end stage renal disease. 3. At the time of entering dialysis schedule BUN was 99.94㎎/dl, Cr 11.53㎎/dl, K 4.99mEq/ι, Ca 7.56㎎/dl, P 5.97㎎/dl, albumin 3.32gm/dl, tatal cholesterol 180.26㎎/dl, hematocrit 23.16%, Ccr 4.42ml/min. 4. Problems in vascular access were most frequent complication causing admission(32.4%) and congestive heart failure(23.5%) was second most. 5. 2 patients(6.3%) died within 3 months of dialysis and 15 patients(34.1%) were lost to follow-up a few months of dialysis. 6. In predialysis blood in patients with chronic hemodialysis BUN was 75.88㎎/dl, Cr 11.68㎎/dl, K 5. 48mEq/1, Ca 9.28㎎/dl, P 3.96㎎/dl, hematocrit 19.81%. Hemodialysis is a major thrapeutic modality for patients with end stage renal disease but many problems remain to be solved. Improved financing, selection of patients for chronic hemodialysis, efforts for reducing complication, teaching patients and so on.

曲線운동에 대한 새로운 記述方法

이철세 培材大學校 1985 論文集 Vol.6 No.-

If one point on a curve has a direction of its tangent line, two points on a curve will have two directions different from each other. Thus, the feature of a curve can be described by means of an angle change rate with respect to the distance between points. The unit of an angle change rate for the disdance between two points is defined as 'rad/m', which we call hereafter 'Andi' in brief.

운동전하와 자기장에 관한 문제

이철세 培材大學校 1997 培材論叢 Vol.2 No.-

The law of Bio-Savart shows that a moving charged particle makes magnetic field. But the movement of particle can not be measured at the same velosity moving coordinate, and the magnetic field can not be measured. To sove this paradox, we must accept the fact that the velosity of the moving charged particle relative to the opposite charged particle is the essential factor of the magnetic field.