Poland 증후군 환아의 마취관리 -증례보고-

정일환 ( Il Hwan Jeong ),최원준 ( Won Jun Choi ),이영재 ( Young Jae Yi ),문성하 ( Sung Ha Mun ),김현수 ( Hyun Soo Kim ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.6

Poland syndrome is a rare congenital anomaly characterized by unilateral chest wall hypoplasia and ipsilateral upper extremity abnormalities, usually on the right side. It can be combined with other anomalies such as scapular deformity of the affected side, and hypoplasia or absence of nipple. Typical surgery for a Poland syndrome patient aims to correct the chest wall defect and/or other abnormalities. Ventilation problem such as paradoxical chest movement can occur during anesthesia. We report management of general anesthesia of a Poland syndrome patient with right chest wall defect undergoing inframammary fold reposition and liposuction. (Korean J Anesthesiol 2009; 57: 773∼5)

Synthesis and Crystal Structure of Yttria-Stabilized Zirconia

김원사,서일환,박로학,김문집,김헌준,이창희,김용채,성백석,이정수,심해섭,김이경,이진호,Kim, Won-Sa,Suh, Il-Hwan,Bak, Ro-Hak,Kim, Moon-Jib,Kim, Huhn-Jun,Lee, Chang-Hee,Kim, Yong-Che,Seong, Baek-Seok,Lee, Jeong-Soo,Shim, Hae-Seop,Kim, Yi-Kyu 한국지구과학회 1997 韓國地球科學會誌 Vol.18 No.6

등축정계의 결정구조를 지니는 무색 투명한 저코니아($Zr_{0.73}Y_{0.27}O_{1.87}$) 결정을 $Y_2O_3$를 안정제로 사용하여 Bridgman-Stockbager법(또는 Skull 용융법)으로 합성하였다. 육성된 결정은 유리광택을 나타내며 동시에 약간의 지방 광택도 띤다. 저코니아 결정은 편광현미경하에서 등방성을 나타내며 이방성의 징후는 발견되지 않는다. 모스 경도는 $8{\sim}8\frac{1}{2}$이고 비중은 5.85이다. 자외선하에서는 약한 백색 형광을 낸다. 단결정법으로 결정한 저코니아의 결정구조는 등축정계이며, 공간군은 $Fm3m({O^5}_h)$이다. 단위포 상수(a)는 $5.1552(5){\AA}$이며, $V=136.99(5){\AA}$, Z=4, R=0.0488이다. 저코니움 원자는 각 모서리에 산소 원자가 자리잡고 있는 육면체의 중심에 위치하고 있으며, 각 산소 원자는 저코니움 원자로 되어 있는 사면체의 중심에 위치하고 있다. 결국 8:4의 배위수가 성립하는 구조를 하고 있다. Colorless and transparent cubic zirconia($Zr_{0.73}Y_{0.27}O_{1.87}$) crystal has been synthesized by the Bridgman-Stock-bager method(also called Skull melting method). $Y_2O_3$ is used as stabilizer. The crystal shows a vitreous luster with a slight oily appearance. Under a polarizing microscope, it shows isotropic nature with no appreciable anisotropism. Mohs hardness value is measured to be $8{\sim}8\frac{1}{2}$ and specific gravity 5.85. Under ultraviolet light it shows a faint white glow. The crystal structure of yttria stabilized zirconia was determined, using single crystal X-ray diffraction techniques to be a cubic symmetry, space group $Fm\overline{3}m({O^5}_h)$ with $a=5.1552(5){\AA}$, $V=136.99(5){\AA}^3$, Z=4, and R=0.0488 for 29 unique reflections. Each zirconium atom is at the center of eight oxygen atoms situated at the corners of a surrounding cube and each oxygen atom is at the center of a tetrahedron of zirconium atoms. So a coordination of 8:4 holds in the structure.

가공정도 향상을 위한 Glass Cutting Machine의 설계 개선

권인환(In-Hwan Kwon),노승훈(Seung-Hoon Ro),박유라(Yu-Ra Park),이일환(Il-Hwan Yi),길사근(Sa-Geun Kil),박근우(Keun-Woo Park) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.3

Touch panels are widely used in the modern display industry as the cover glass of smart mobile phones and tablet PCs. Glass cutting machines are commonly used to cut the panels into their proper sizes. Vibration of these glass cutting machines is assumed to be the main factor leading to the creation of burrs, notches, cracks, scratches and chips on the cut surfaces, eventually causing defects of the cover glass. In this study, the vibrations of a glass cutting machine used for the shearing of cover glass components were analyzed through an experiment and a computer simulation. The structural properties leading to vibration were also analyzed in an effort to determine design alterations which can suppress these vibrations. Moreover, each design alteration was applied to a computer simulation model to determine the effect of different alteration on suppressing vibration. The results show that simple design alterations can substantially suppress vibrations of glass cutting machines

안정성 향상을 위한 Wafer Polishing Machine의 지지구조 개선

노승훈(Seung-Hoon Ro),김영조(Young-Jo Kim),김동욱(Dong-Wook Kim),이일환(Il-Hwan Yi),박근우(Keun-Woo Park) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.2

Polishing is not only one of the most frequently adopted processes in modern industries, but also the most critical one to the surface quality of the products such as semi conductor wafers and LED sapphire wafers. With the required specifications for the wafer surface quality getting more and more strengthened, the manufacturers are spending huge amount of cost to renew the machine to meet the enhanced surface specifications. Surface qualities of the wafers are mostly damaged by the structural vibrations of the polishing machines. In this paper, the dynamic characteristics of a wafer polishing machine have been analyzed through the frequency response test and the computer simulation. And the supporting structure of a polishing machine has been investigated to minimize the vibration transmissions, to improve the stability of the machine and further to reduce the defects of the polished products. The result of the study shows that simple design modifications of the supporting structure without altering the ma in structure of the machine can substantially suppress the vibrations of the machine with negligible expenses.

C형 간질환의 가족내 감염 : 배우자의 역활 The Important Role of Infection between Spouses

이선영,문일환 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.1

저자는 1994년 1월부터 1995년 10월까지 만 22개월간 이화대학 부속 목동병원 내과 26명을 대상으로 성관계에 의한 전염이 어느정도 유병률과 연관성이 있는가에 대하여 고찰하여 다음과 같은 결과를 얻었다. 1) 간 질환의 정도는 급성간염 1예, 만성간염 19예, 그리고 간경변 6예 등이 있었다. 2) 배우자의 양성률은 총 26예 중 단 1예로 3.8%(1/26)로 나타났으나 공 혈자의 양성률과(1.49%) 전체 인구 연령 표준화상 통계적 유의한 차 이가 없었다. 3) 결혼 기간이나 간 질환의 만성도에 따른 배우자 양성률은 그 의의를 찾을 수 없었다. 결론적으로 우리나라에서 C 형 간염 바이러스의 가족내 감염은 있을 것으로 추정 되었으나 그 빈도는 낮을 것으로 생각되며 경주적 노출이외의 성적 접촉 감염은 미미할 것으로 생각된다. To determine the possibility of for sexual transmission of hepatitis C virus, we report a study on 26 cases of type C liver disease that were evaluated in the Department of Internal Medicine of the Ewha Womans University(Mok-dong hospital) over a period of 22 months from January of 1994 to October of 1995. The results were as follows, 1) There were 1 acute hepatitis case, 19 chronic hepatitis cases, and 6 liver cirrhosis cases. 2) The positive rate of anti-HCV of spouse was 3.8%. The positive rate was not significant compared to control group(total age adjusted prevalence). 3) The positive rate of anti-HCV of spouse was not significantly related with duration of mar-riage or severity of disease. Intrafamilial spread of HCV by sexual transmission is one of the route for transmission of disease. But these result suggested it was uncommon route of transmission of hepatitis C.

내시경적 역행성 췌담관 조영술후 췌장염 발생에 대한 임상적 고찰

문일환,이선영 대한소화기내시경학회 1996 Clinical Endoscopy Vol.16 No.4

Background/Aims: Pancreatitis is one of the major complications of ERCP. The purpose of this study is to evaluate the incidence rate and risk factors of ERCP- induced pancreatitis. Method: We analysed 99 consecutive patients(45 males and 44 females) undergoing ERCP from March to September, 1994. The level of serum amylase was measured and clinical assessment of pancreatitis was performed before, 24 hour, 48 hour, and 72 hour after ERCP. We defined clidical pancreatitis as combination of elevated amylase level over 2 days with abdomial pain and tenderness. Reaults: ① Fifty eight patients(58.6%) underwent ERCP for diagnosis, and 32 patients(32.3%) for therapy including endoscopic sphincterotomy(EST), endoscopic nasobiliary drainage(ENBD), or endoscopic retrograde biliary drainage(ERBD). The failure rate of the ERCP was 9 percent(9 patients). ② Underlying diseases were 64 biliary stone cases(71.1%), 15 malignant cases, and other 11 cases. ③ There were 3 ERCP-induced pancreatitis cases(3%) including 2 mild cases and t severe case leading to sepsis and death. C)ther ERCP-induced complication included hemorrhage. ④ The patient group who underwent therapeutic ERCP including EST, ENBD, or ERBD, showed significantly higher rate(9.4%) of complication than the group who underwent diagnostic ERCP(0%)(P$lt;0.01). Age, gender, periampullary diucticolon, the kinds of underlying disease, or the connulation of pancreatic duct showed no significant effect on the incidence rate(P$gt;0.05). Conclusion: The incidence rate and risk factor of ERCP-induced pancreatitis were 3 percent and therapeutic ERCP, respectively. There were no other risk factors. ERCP seldom induces clinical problems if performed by an expert endoscopist with cauxion. However, since a severe complication may cause death, careful monitoring is required for patients undergoing ERCP.

한국인의 위암조직에서 Helicobacter pylori CagA 유전자의 역할

문일환,정혜경,이선영,이한주,김도영,정성애 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4

Bachground/Aims: To further understand the relationship between the cagA gene and gastric cancer, the positive rates of the cagA gene in cancer and non-cancer tissues were investigated separately in patients with gastric cancer. Methods: The cagA gene was detected by PCR and the ureC gene was analyzed as a positive control for the presence of Helicobacter pylori. Each of two endoscopic biopsies were obtained from cancer and non-cancer tissues of 41 patients with gastric cancer. Results: 1) The positive rate of the cagA gene in cancer tissues was 29.3% (12/41), which was significantly lower than that in non-cancer tissues (63.4%). 2) Twelve (29.3%) out of 41 were positive for the cagA gene in both cancer and non-cancer tissues, 14 were positive in only non-cancer tissues, none were positive in only cancer tissues, and 15 (36.6%) were negative in both sites. 3) The ureC gene was negative in cancer tissue in 12 (85.7%) among 14 cases who were cagA gene negative in the cancer tissue but positive in the non-cancer tissue. 4) There was no difference in the positive rate of the cagA gene according to age, stage, site, and pathologic cell type. Conclusions: These findings indicate that the positive rate of the cagA gene in cancer tissue was lower than that in non-cancer tissues and this might be related to a low infection rate of H. pylori in cancer tissue rather than the presence of cagA negative H. pylori in cancer tissues.

재출혈의 위험이 높은 소화성 궤양 출혈 환자에서 오메프라졸 경구 투여와 내시경적 에탄올 주입치료의 효과 비교 : 전향적 무작위 대조 연구

문일환,정혜경,이선영,이한주,김도영,정성애,손혜영 대한소화기학회 1999 대한소화기학회지 Vol.34 No.6

Background/Aims: Omeprazole is a potent inhibitor of gastric acid secretion. Recently, it was reported that oral omeprazole therapy reduced the rate of rebleeding in patients with non-bleeding visible vessels or adherent clots. The aim of this study was to ascertain whether oral omeprazole administration can be an alternative to endoscopic injection therapy for peptic ulcers with stigmata of rebleeding. Methods: Seventy-six patients with peptic ulcer bleeding who had endoscopic findings of non-bleeding visible vessels or fresh adherent clots were randomly assigned to oral omeprazole (40 mg every 12 hours) therapy or endoscopic ethanol injection therapy. Both groups were homogeneous in all clinical and endoscopic parameters. Results: The rebleeding rates were 25% in the group of omeprazole therapy and 20% in the group of endoscopic injection therapy. The rebleeding rates with clinical significance were 13.9% and 12.5%, respectively. There was no significant difference in rebleeding rate, requirement of surgery, blood transfusion units, and mortality rate. Conclusions: Oral omeprazole administration is comparable to endoscopic ethanol injection therapy for the prevention of rebleeding in patients with non-bleeding visible vessels or adherent clots.

담도 낭선종에서 기원한 담도 낭선암 1예

이현경,문일환,이선영,서기열,신태림,김승정 대한소화기학회 1998 대한소화기학회지 Vol.32 No.2

Biliary cystadenocarcinoma is a rare malignancy and occurs predominantly in middle aged woman. Its clinical manifestation is nonspecific and not distinctive from benign cystic lesion. Sonography and computed tomography usually show a septated, multiloculated cystic mass with varying degrees of mural and septal thiekening. Ultrasonography and/or CT have been used for guidance in the percutaneous aspiration of the cystic fluid and needle biopsy. We report one case of biliary cystadenocarcinoma, which arised from cystadenoma in a 67-year-old man, with a review of literature.

반복적인 담관염으로 나타난 점액 생성 담관암 1예

이나영,문일환,이선영,백승연 대한소화기내시경학회 1998 Clinical Endoscopy Vol.18 No.6

Free-floating tumor debris or mucobilia as a cauae of intermittent obstruction has been described infrequently. A middle aged woman with intermittent jaundice caused by abundant mucus from an intrahepatic mucinous cholangiocarcinoma is presented. Symptoms of juandice, midepigastric pain and fever developed despited an intitial cholecystectomy and common bile duct stone extraction using endoscopic retrograde cholangography (ERCP). Intraductal mucin was diagnosed through on ERCP and confirmed intraoperatively and pathologically as the cause of the obstructive juandice. The patient remained asymptomatic and without evidence of disease for more than 2 years postoperatively. Description is presented of the patient who was admitted presented with recurrent cholangitis caused by profuse secretion of mucus by mucin-producing cholangiocaricnoma, with a review of relevant literature.