급성전골수성백혈병에서 백혈구성분채집술에 이은 치명적인 뇌출혈 2예

오윤정,박소윤,김윤정,한동석,김현수,최진혁,남동기,임호영,김효철,주희재 아주대학교 의과학연구소 1998 아주의학 Vol.3 No.1

The aim of this study is to report 2 cases of acute promyelocytic leukemia who died from intracranial hemorrhage following leukapheresis and to provide proper preventive measures against hemorrhage following leukapheresis. From 1994 to 1997, a total of twenty-six patients with leukemia underwent leukapheresis to control hyperleukocytosis at Ajou University Hospital. Two patients with acute promyelocytic leukemia received all-trans retinoic acid but developed drug-induced hyperleukocytosis. Shortly after leukapheresis, they died from intracranial hemorrhage. The risk factors for fatal hemorrhage are thought to be coexisting disseminated intravascular coagulation(DIC), thrombocytopenia aggravated by leukapheresis, exacerbated coagulopathy related to mechanical trauma through leukapheresis and the excess use of citrate during leukapheresis. To reduce the risk of the bleeding associated with leukapheresis, it is necessary to replace platelet sufficiently before and after leukapheresis and to give calcium to correct coagulopathy induced by excess citrate which is used as anticoagulant as well as the correction of disseminated intravascular coagulation.

단일 치근을 가진 하악 제1유구치

윤상일,최형준,김성오,이제호,손흥규 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

본 증례에서는 단일 치근을 가진 하악 제1유구치에 대해 서술하고자 한다. 5세 남아의 하악 제1유구치는 방사선 사진 검사결과 양측성으로 분명한 단일치근을 가진 것으로 나타났다. 보통 상악 구치는 3개의 치근을, 하악 구치는 2개의 치근을 가지나, 치아의 발육시기도중 Hertwig상피근초가 제 시기에 적절히 함입되지 못하면 치근이 서로 나뉘지 못하여 치근의 융합이 발생될 수 있다. 융합된 치근을 가진 구치는 정상적인 구치보다 불리한 치관-치근 비율을 가질 뿐 아니라, 여러 보고에 의하면 융합된 치근을 가진 사람은 다수 치아의 선천적 결손이나, 상악 전치에서 치내치가 발현될 확률이 높아 예방적 치과 치료가 필요할 수 있다. 그리고, 외배엽이형성증, 합지증, 만지증, 청색공막증과 같은 전신 질환과 연관되어 나타날 수도 있다고 한다. 치근융합은 유전적으로 상염색체 열성 유전을 따른다고 밝혀진 바 있다. 현재까지 단일 치근을 가진 구치는 대부분 영구 구치에서 많이 보고된 바 있지만, 유구치에서는 거의 보고된 바가 없기에 이에 보고하는 바이다. In this case, we would like to discuss about the single rooted deciduous mandibular first molar. The deciduous mandibular molar of a five years old boy was shown to have a single root, bilaterally. Ordinarily, the maxilary molars have three roots and the mandibular molars have two roots. However, when the hertwig's epithelial root sheath do not invaginate properly during tooth development, root fusion can occur from the absence of root separation. Molars with fused roots not only have unfavorable crown to root ratio, but also according to many reports, have higher probability of having multiple congenitally missing teeth or dens invaginatus in the maxillary incisors, consequently requiring preventive dental treatment. In addition, disorders such as ectodermal dysplasia, syndactyly, clinodactyly, bluish sclera can also be related to this condition. Root fusion is known to be of autosomal recessive inheritance. Up to date, single rooted molars have been reported several times in permanent dentitions but hardly in deciduous dentition, which is the motive for this paper.

'90년대 남북한관계와 향후 전개 방향에 관한 소고

오수열,윤재문 朝鮮大學校 社會科學硏究所 2000 社會科學硏究 Vol.21 No.1

도시 소하천에서 수질현황 및 오염부하 특성에 관한 연구

오종민,박재영,윤동선 慶熙大學校 1997 論文集 Vol.26 No.-

This study was performed to analyze the water quality from small urban stream and to restore the stream and the take to the amenity environment by purifying urban stream. The amenity environment of the urban stream influences on ecosystem and the water quality of the lake. In this study sampling sites were set for the Shingal stream, the Jigok stream and the sewages which flow in the Shingal stream. The flow rate, pH, EC, concentration of DO, BOD, COD, NH_4-N, NO_2-N, NO_3-N, T-P, PO_4-P and Cl^- in stream were analyzed from April, 1995 to March,1996. The results obtained from these investigations were as follow; The annual average pH was 7.63. Concentrations of SS, BOD, T-N and T-P were 10.6㎎/1, 3.42㎎/1, 8.58㎎/1 and 0.275㎎/1 at the upstream and 24.8㎎/1, 16.64㎎/1, 14.25㎎/and 0.88㎎/1 at the downstream, respectively. It indicates that rapid contamination of water quality occurred during its flow from upstream downstream. The suggested plans to improve the water quality of the Shingal stream and lake Shingal are as follows. ① Reduction of inflow loading with construction of wastewater treatment plant. ② Educate environmental consciousness for getting the reduction of municipal sewage inflow. ③ In the industrial area, reinforce wastewater emission control level with more strict requisitions. ④ Dredging of sediment for self-purification.

영아의 선천성심질환에 대한 개심술후의 집중치료에서 복막투석용 도관삽입의 의의

오재화,윤향석 圓光大學校 醫科學硏究所 1999 圓光醫科學 Vol.15 No.2

Background: We reviewed 5 years' experience with peritoneal drainage(PDr) in infants who underwent open heart surgery. The aim of this study was to investigate the effect of PDr on fluid balance and several parameters of intensive care. We hypothesized that PDr is safe and effective in infants with low-output cardiac failure after cardiac operations. Methods: Six(3.3%) of 60 consecutive infants who underwent open heart surgery required peritoneal dialysis(PD) during the PDr. Simple PDr was performed in remaining 54 infants. The silicone rubber PD catheter was inserted into the center of abdominal cavity just after the operation, and the subsequent PDr was maintained during the intensive care. Results: Early postoperative mortality in all in infants with congenital heart disease was 1.6%. Total amount of intake was 6.30±1.59 ㎖/㎏/hr, and total output was 6.95±2.32 ㎖/㎏/hr, urine output was 5.08±2.55 ㎖/㎏/hr, pleural fluid 0.78±0.52 ㎖/㎏/hr, peritoneal fluid 1.20±0.90 ㎖/㎏/hr. The ratio of the output to the intake(O/I) was 1.1. None of the complications required early termination of the drainage. Hemodynamics and pulmonary function were maintained steadily during the postoperative intensive care. Conclusions: The early institution of peritoneal drainage(PDr) in infants with congenital heart disease after cardiac operations not only removes fluid, thus easing fluid restriction, but may also improve cardiopulmonary function.

저수탱크의 혼화특성 평가

윤재흥,정혜원,오정우 대한상하수도학회 2003 상하수도학회지 Vol.17 No.1

Storage tanks have two types of function. One is to maximize the disinfection capability by inducing plug flow, and the other is to regulate the water quality by mixing flow completely. Hence the mixing indices to represent the flow characteristics in tanks are required to identify if the tank performs its function well. As a result of evaluating the existing indices with fluoride-tracer and dye tests, T_10/T and T_90/T_10 proved relatively good indices. However, T_10/T showed some limits to representing the characteristic of residence time distribution, and T_90/T_10 had too wide range of the values to be easily used for assessing the flow characteristics. An index proposed in this study can properly represent both the completely mixed and plug flows as well as short-circuit flow, and can be used as an index of assessing mixing characteristics.

난소 및 난소 종양 염전의 초음파 소견

오연희,이현경,이원재,이성우,박수성,윤혜원,임문환,심재철,김용탁,김성숙,김정란 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

Acute torsion of the ovary and ovarian mass is a recognized surgical emergency, but rarely has the diagnosis been made preoperatively on the basis of imaging studies. The sonographic findings in 14 cases of surgically proven torsion of the ovary and ovarian mass are described. Mostly cystic ovarian mass, engorged vessel, dilated uterine tube, beak-like echo(torsion site), smooth mass wall thickening an free-fluid collection in cul-de-sac are described. More significant in terms of specificity were the demonstration in 6 cases(42.9%) of the smooth mass wall thickening and in 8 cases(57.1%) of a free fluid in the cul-de-sac. We report the sonographic findings of ovary and ovarian mass torsion that may suggest the preoperative diagnosis of this condition.

Duct-Occlud를 이용한 동맥관개존의 비수술적 폐쇄

오만택,오재화,윤향석 圓光大學校 醫科學硏究所 1999 圓光醫科學 Vol.15 No.2

Background: We tried to occlude the duct with retrievable coil device(Duct-Occlud) in 6 children with patent ductus arteriosus(PDA). And, we reviewed the technical aspects and the short-term results. Methods: PDA occlusion with "Duct-Occlud" system was attempted in 6 patients with small to moderate size PDA from January 1999 to November 1999. Mean age of the patients was 6.56 (1.33 to 14)year. After estimation of the size of PDA, retrievable coil device(Duct-Occlud) was inserted through the femoral vein route. The angiocardiography was performed 10 minutes after the procedure. On next day and one week later, the follow-up echocardiogaphy was checked. And then, it repeated at 3 months, 6 months later. The follow-up duration was 5.5(1 to 11) months. Results: The Qp/Qs was 1.44(1.25 to 1.63), Rp/Rs 0.09(0.03 to 0.15), size of pulmonary end 2.73(2.1 to 3.5)㎜, aortic end 4.58(2.8 to 5.5)㎜, length 5.83(3.8 to 8)㎜. The complication of the procedure occurred in one patient by uneventful earlier detatchment. Flow disturbance was not developed. Conclusions: Coil occlusion with the Duct-Occlud system is a safe and effective method for percutaneous closure of small to moderate-size PDAs. Larger numbers of treated patients and longer follow-up period would be necessary to more precisely define the efficacy, and most appropriate indications for this system.

특발성 자발성 신장 파열 1예

윤재철,김원,조규종,홍정석,이미우,장성은,오세현,임경수 대한응급의학회 2001 대한응급의학회지 Vol.12 No.4

Primary aldosteronism is a syndrome characterized by hypertension, hypokalemia, suppressed plasma renin activity, and elevated serum aldosterone levels. Conn first described it 1955 in association with adrenal cortical adenoma(Conn's syndrome). Today, it can be divided into at least six distinctive sub-groups. The diagnosis of primary aldosteronism is usually suspected when the patient presents with poorly controlled hypertension with hypokalemia. The main issues in the evaluation of primary aldosteronism are to differentiate an adenoma from hyperplasia and to localize the adenoma. Basic hormonal studies and computed tomographic(CT) scanning can be used effectively for that differentiation. An adenoma is one of a few potentially curable forms of hypertension, and it is best treated by removing the adrenal tumor. We experienced a case of a typical adrenal adenoma. The patient was a 37-year-old male who had experienced in both his legs over a period of several days a weakness due to hypokalemia. He was diagnosed using basic hormonal studies and adrenal CT scanning. After, he received laparoscopic adrenalectomy and was discharged with improved condition.

自然型 接觸酸化法에 의한 都市下水 處理에 關한 硏究

오종민,김무훈,윤동선,박재영 경희대학교 산학협력기술연구원 1997 산학협력기술연구논문집 Vol.3 No.-

This study was performed to estimate the organic matter removal efficiency when apply to natural purification method with variable media. We used gravel, concrete, tire, scrubber as media of contact oxidation reactor. And when scrubber, gravel, the average SS, BOD, COD removal efficiency was very high(when scrubber, 96.3, 78.1, 59.0 % and gravel, 82.1, 73.8, 56.5 %, respectively). If the physical and chemical operations are added to contact oxidation process for the removal of nitrogen, phosphorous, the water quality of urban small stream which is polluted by municipal waste water will be purified.