硬化性 物質(Sotradecol^ⓡ과 Tetracycline)을 利用한 腎動脈塞栓에 關한 實驗的 硏究

趙俊植,李秉喆 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.1

Transcatheter embolization. of renal artery using Gelfoam^ⓡ soaked in Sotradecol^ⓡ sodium tetradecyl sulfate) and Tetracycline solution in rabbits was performed to evaluate the effect of intra-arterial injection. Selective renal arteriography was done at 15 minutes, 1 week and 4 weeks after embolization. The rabbits were subsequently sacrificed and histopathologic examination performed. The result were as follows: 1. Initial segmental occlusion was sustained in 11 of 16 cases that performed follow-up angiography. Recanalized vessels showed irregular narrowing and marked decrease in number in 2 of 5 cases and progressive occlusion of segmental and proximal renal artery in 3 of 5 cases. 2. The infarcted kidneys were swollen and enlarged at 1 week. There were resulted in shrinkage of infarcted kidney and compansatory hypertrophy of opposite kidney depending on intitial extent of infarcted area at 4 weeks. 3. After embolization, minute collateral vessels were developed in 10 of 16 cases without remarkable nephrogram in infarcted area. 4. The effect of, Tetracycline seemed, to be similar to that of Sotradecol in producing arterial occlusion. 5% Tetracycline was :more injurious than 2.5% concentration in occlusion of renal artery. 5. Abscess formation within infarcted kidney was occurred in two cases using Sotradecol but not occurred in cases using Tetracycline. 6. Sotradecol and Tetracycline were the effective agents of producing persistent renal infarction with peripheral as well as central occlusion. It was consirdered that intra-arterial injection of Tetracycline was the available mean of producing persistent renal artery embolization.

위암에 의한 간 전이의 CT 진단에 있어 조영제의 급속 정맥주사방법을 이용한 문맥기 역동적 CT의 유용성 : Usefulness of Bolus Dynamic CT During Portal Phase

조준식,송창준,김종철,이병철 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2

Purpose : We evaluated the usefulness of dynamic CT during portal phase with faster injection rate of contrast material in detecting hepatic metastases from gastric cancers. Subjects and Methods : We retrospectively analyzed two-phase dynamic CT findings (portal phase and equilibrium phase) in 17 patients with pathologically proven gastric cancers and hepatic metastases. In 13 patients, a total of 150ml of nonionic contrast material was administered with a power injector at a flow rate of 5ml/sec for 30 sec, and two-phase images were obtained at 45-70 sec (portal phase) and 2-4 min (equilibrium phase) after the start of bolus injection. In four patients, two-phase dynamic CT with spiral technique was performed with the same method. Results : In cases of metastases less than 1 cm in diameter, 65 lesions were detected in the portal phase that showed clearly defined hypodense lesions in highly enhanced hepatic parenchyma. Whereas, only nine (14%) lesions were detected in the equilibrium phase and the remaining 56(86%) lesions showed isoattenuation. In cases of metastases more than 1 cm in diameter, 37 lesions were detected in the portal phase that showed clearly defined hypoattenuations. whereas, the images of equilibrium phase showed isoattenuation in five (14%), mixed attenuation in three (8%), and hypoattenuation in 29 (78%). The lesions detected in the equilibrium phase showed poorly defined hypodense lesions and tended to decrease in size due to peripheral enhancement of lesions. Conclusion : Dynamic CT during portal phase with faster injection rate of IV contrast material is an useful technique in detecting hepatic metastases from gastric cancers, particularly small lesions less than 1 cm in diameter.

고비중 Bupivacaine과 Tetracaine에 의한 척추마취의 비교

조남수,유병식,박은주 최신의학사 1989 最新醫學 Vol.32 No.11

척추 손상 복합골절의 전산화단층 촬영에 관한 방사선학적 연구

이병철,조준식 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2

CT is now the method of choice for evaluating spinal trauma. The author had a retrospective study for traumatic burst fracture of spine with simple X-ray and CT. During the period of 2 years from June 1984, the radiological and clinical evaluation had been made on 20 patients suffered from vertebral burst fracture which were confirmed by the radiological examination. The results were as follows; 1. Among 20 patients, single spinal injury was 15 cases(75%), multiple level injuries were 5 cases(25%). 2. Level of spinal injuries were as follows; Most frequent site was thoracolumbar junction (T_11-L_2) in 12 cases(60%), and lower cervical spine (C_3-C_7) in 3 cases(15%). 3. All the burst fractures showed spinal canal narrowing with impingement of bony fragments in axial CT, and we were found exactly posterior element fractures with CT, which were difficult to detect with simple X-ray. 4. Multiplanar reconstruction images were more favorable to detect the character of retropulsed vertebral body fragments.

생체분해성 고분자를 이용한 사시수술용 제형개발 및 효용성에 대한 연구

민병무,김용백,김승영,김창식,박근성,길숙종,조항진,이성복,노승무,송규상,강대영,조준식,양준묵,정경수,최선웅,이진호,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

A new device, muscle clamping system was developed to facilitate exact quatifying technique A strabismus surgery, and reduce the risk of complications. The device is composed of a lower fixing body with three jaws and an upper supporting body. They are used to clip an extraocular muscle and fix it to the sclera with a single bite. Superior rectus recession on 16 rabbit eyes were performed with this new device. Conjunctival injection, muscle adhesion strength, and light microscopic findings were examined at 1, 2, 4 and 8 weeks postoperatively. The Conjunctival injection were minimal, adhesion power ranged from 420 to 600 gram gravity, which is sufficient in withstand the normal pull of human extraocular muscle. In microscopic exam, some Inflammatory cells and fibrosis were found. The new device was technically easy, fast, and accurate, so it may be useful in stabismus surgery.

마멸입자 형태해석에 의한 유압피스톤용 모터의 상태감시

문병주,조연상,박흥식,전태옥 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6

Morphological analysis of wear particles is one of useful methods for machine condition monitoring because it is well reflected in machine driving state. This paper was undertaken to apply to the condition monitoring of hydraulic piston motor. The lubricating wear test was performed under different experimental conditions using the wear test device and wear specimens of the pin on disk type was rubbed in paraffinic base oil by three kinds of lubricating materials, varying applied load, sliding distance. The four shape parameters (50% volumetric diameter, aspect, roundness and reflectivity) arc used for morphological analysis of wear particles. The results showed that the four shape parameters of wear particles depend on a kind of the lubricating materials. It was capable of calculating presumed wear volume for three kinds of mate-rials on driving time to foresee a damage condition of lubricating materials.

통년성 알레르기성 비염(Perennial allergic rhinitis)에 대한 아크리바스틴(Semprair)^(�)의 임상효과

김민식,신민호,조승호,서병도 최신의학사 1992 最新醫學 Vol.35 No.2

이상형 스테인레스강의 크롬질화물 석출과 상 방위관계 연구

최병학,김진우,고석민,조용석,김상식,이재현 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-

Microstructures in the directionally solidified duplex stainless steels were investigated in order to understand the effect of nitrogen addition and its precipitation in the α phase. It was found that the addition of nitrogen causes the formation of fine precipitates in α matrix and segregation phases of nitrogen in the α/γ interface. Both the fine precipitates and the segregation phases were identified as CrN(fcc, a=4.18Å), as a coherent phase related to the α-bcc matrix with crystal relationship of (200) CrN//(01￣1)α and (1￣1￣1)CrN//(3￣2￣1)α.

Fractal 차원에 의한 표면경화면과 마찰면의 형태해석

문병주,조연상,옥철호,박흥식,전태옥 동아대학교 생산기술연구소 2001 生産技術硏究所硏究論文集 Vol.6 No.1

The determination of surface middleography is believed to be extremely important in the areas of contact mechanics, adhesion and friction. In order to describe middleography of various rubbed and hardened surface, the wear test was carried out under different experimental conditions in dry friction. And fractal descriptors was applied to rubbed and hardened surface of laser modified steel with image processing system. These descriptors to analyze surface structure are fractal dimension. Surface fractal dimension can be determined by sum of intensity difference of surface pixel. middleography of rubbed and hardened surface can be effectively obtained by fractal dimensions.

한국인 頭蓋底의 諸般 正常計測値에 관한 放射線學的 硏究

이병철,조준식 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.2

Determination of several normal values were carried out in healthy 200 cases of Korean adults, 108 cases of male and 92 cases of females, by the drawing and calculation on skull roentgenograms, In many instances, the change of normal values provides an important clinical values and often is decisive to evaluate the diagnosis, treatment and prognosis of skull diseases. The values are as follows, 1. To determine basilar invagination; A. Chamberlain's line; the distance of odontoid process B. McRae's line; realation with the position of odontoid process C. Method of Bull; The angle B in Fig. 3 is more than 13, the position of the odontoid process is abnormal D. McGregor's line; the distance of odontoid process 2. Basal angle to determine platybasia. 3. In sella turcica; A. Depth B. A-P diameter C. Traseverse diameter D. Volume The results are as follows; 1. Chamberlain's line; the distance between this line and upper margin of odontoid process (mean) male 1. 02cm, female 0.67em, total 0. 91cm below the line 2. McRae's line; In all cases, the position of dontoid process located below this line 3. Method of Bull; (mean) male 7.34°female 8.18°total 7.61° 4. McGregor's line; the distance between this line and upper margin of odontid process; (mean) male 3.5mm, female 2.2mm, total 3.1mm below this line 2. Basal angle; (mean) male 131.32°female 132.26°total 131.62° 3. In sella turcica; (mean) A. Depth; male 1.17cm, female 0.96cm, total O.94cm B. A-P diameter; 1.31cm, female 1.25cm, total 1.29cm C. Transverse diameter; male 2.04cm, female 2.08cm, total 2.07 cm D. Volume; V=0.36×A×B×C male 1126mm^3, female 899mm^3, total 904mm^3