신생아에서 수신증의 심한 정도와 방광요관역류 존재와의 연관성

이효정,노성훈,이수연,김민선,이대열,Lee, Hyo-Jung,Noh, Seong-Hoon,Lee, Soo-Yeon,Kim, Min-Sun,Lee, Dae-Yeol 대한소아신장학회 2009 Childhood kidney diseases Vol.13 No.1

Purpose : The increasing use of ultrasonography has allowed for an increase in the of the detection of congenital hydronephrosis, and the clinical outcomes of congenital hydronephrosis are widely varied. In this study, the necessity of voiding cystourethrography in neonate with hydronephrosis to rule out vesicoureteral reflux (VUR) was evaluated. Methods : Between January 2004 and December 2007, we reviewed the medical record of 157 childrens with congenital hydronephrosis detected within 1 month of age. The severity of hydronephrosis was graded by SFU (Society of Fetal Urology) system, and anterior posterior pelvic diameter (APPD). We evaluated the relationship between severity of hydronephrosis and incidence of VUR by using SPSS windows version 16.0. A P-value<0.05 is considered to be statistically significant. Results : Total renal unit number was 254, and 20(7.8%) renal units had VUR. We did not find any relationship between hydronephrosis grade the presence of VUR grade (P>0.05). In addition, there was no statistical significance between APPD, laterality of hydronephrosis and VUR incidence. However, renal units with VUR had lower spontaneous resolution rate (P<0.05), compared to renal units without VUR. Conclusion : In this study, there was no statistical significance between the severity of hydronephrosis and presence of VUR. Therefore, voiding cystourethrogram is recommended for all children with hydronephrosis to rule out VUR, regardless of the severity of hydronephrosis. 목 적 : 산전 초음파 이용의 증가로 인하여 선천성 수신증 발견 빈도가 증가하고 있고 VUR이 수신증의 원인 중 하나이다. 본 연구에서는 선천성 수신증의 정도와 VUR의 연관성을 조사하여 배뇨성 방광요도 조영술의 필요성을 알아보고자 하였다. 방 법 : 2004년 1월 1일 부터 2007년 12월 31일 까지 생후 1개월 이내에 선천성 수신증이 진단된 157명의 환아 254구의 신장을 대상으로 수신증의 등급 및 신우 전후직경이 VUR의 빈도와 연관성이 있는지를 연구하였다. 통계 분석은 SPSS 16.0을 이용하여 Chi-Square 법, ANOVA 법으로 분석하였으며, P값이 0.05 미만인 경우를 통계적으로 유의한 것으로 분석하였다. 결 과 : 수신증이 있는 254구의 신장 중 7.8%에 해당하는 20구의 신장에서 VUR이 동반되었다. 수신증 등급과 신우 전후직경은 VUR의 빈도와는 의미있는 상관관계가 없었고, 좌측이 우측보다 수신증의 정도와 VUR 등급이 유의하게 높았으며 VUR이 존재하는 경우 수신증의 자연 소실률이 현저히 낮은 것으로 나타났다. 결 론 : 본 연구에서 수신증 등급과 VUR의 유무와는 통계적 유의성이 없었다. 따라서 수신증의 심한 정도에 관계없이 모든 환아에서 VUR 유무를 확인하기 위해 배뇨성 방광요도조영술은 시행되어야 한다.

위암의 근치적 절제 후 발생한 뇌 전이

김용일,이준호,윤성현,노성훈,민진식,Kim, Yong-Il,Lee, Jun-Ho,Yun, Seong-Hyeon,Noh, Sung-Hoon,Min, Jin-Sik 대한위암학회 2001 대한위암학회지 Vol.1 No.2

Purpose: The common features of brain metastases from gastric cancer are unknown because brain metastasis is an uncommon pattern of metastasis. The purpose of this study was to investigate the clinical features of and the prognosis for patients with brain metastases after a curative resection for gastric cancer. Materials and Methods: Twenty-one (21) cases of patients with brain metastases of gastric cancer, who had been treated at the Department of Surgery, Yonsei University College of Medicine, were assessed retrospectively. Results: The mean age was $55.8\pm9.6$ years (range: $34\~70$ years), and the male-to-female ratio was 2.5 : .1. The most common neurologic symptom was headache ($38.5\%$), and no patient was free from the neurologic symptoms. The incidence of parenchymal metastasis (PM: $76.2\%$) was higher than that of leptomeningeal metastasis (LM: $19.0\%$). Patients with gastric cancer and brain metastasis showed high rates of blood and lymphatic vessel invasion (lymphatic vessel invasion: $85.7\%$; blood vessel invasion: $80.9\%$). According to Lauren's classification, the incidence of intestinal types was 14/21 ($66.7\%$), that of diffuse types was 3/21 ($14.3\%$) and that of mixed types was 4/21 ($19.0\%$). The mean interval between the gastrectomy and the diagnosis of brain metastasis was $24.7\pm4.0$ months (PM: 26.8 months; LM: 20.3 months). The median period of survival after diagnosis of brain metastasis was 2 months for paren chymal metastasis and 0 months for leptomeningeal metastasis. Conclusion:.. During a follow-up period, patients with neurologic symptoms should be suspected of having brain metastasis. Early diagnosis and treatment is the only hope to prolong survival in such patients.

MATLAB<SUP>Ⓡ</SUP>과 Recurdyn<SUP>Ⓡ</SUP>의 Simulink를 활용한 2축 부가 축과 6축 수직 다관절로봇의 기구적 연동에 관한 연구

배승민(Seung-Min Bae),정원지(Won-Jee Chung),노성훈(Seong-Hoon Noh) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.4

Currently, 6-axis articulated robots are used throughout the industry because of their 6-dof (degrees of freedom) and usability. However, 6-axis articulated robots have a fixed base and their movements are limited by the rotational operating range of each axis. If the angle of the 2-axis additional axes can be adjusted according to the position and orientation of the end-effector of the 6-axis articulated robot, the effectiveness of the 6-axis articulated robot can be further increased in areas where the angle is important, such as welding. Therefore, in this paper, we proposed a cooperative kinematic inter-operation strategy. The strategy will be verified using the Simulink of MATLAB<SUP>Ⓡ</SUP>, an engineering program, and Recurdyn<SUP>Ⓡ</SUP>, a dynamic simulation program.

RecurDyn<SUP>®</SUP>과 LabVIEW<SUP>®</SUP>기반 6축 수직 다관절로봇을 이용한 용접의 효율을 높이는 부가 축의 접목에 대한 연구

홍준락(Jun Rak Hong),정원지(Won Jee Chung),박승규(Seung Kyu Park),노성훈(Seong Hoon Noh) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11

This paper aims to realize 2-axis additional axes, which increases processing efficiency of a robot by controlling in harmful environments or design fields beyond human reach. Ultimately, this is to create temporal and efficient profits in industrial processing sites including welding and assembling 6-axis articulated robot (RS2). Also, using RecurDyn<SUP>Ⓡ</SUP>, a simulation-based technique is applied. And the motion paths of the welding rod will be compared for two cases in order to verify the necessity of the 2-axis additional axes: 1) when there are no 2-axis additional axes and 2) when there are 2- axis additional axes during welding using the RS2. For this purpose, the angle variations of RS2 axes required for a simulation are compared, on the assumption that each of the four points of the welding bed installed in the 2-axis additional axes of the welding rod in SolidWorks<SUP>Ⓡ</SUP> is point-welded. Then an actual 2-axis additional axes equipment will be grafted on to RS2 and the process times depending on the existence of 2-axis additional axes are compared using a PC-based robot control program, LabVIEW<SUP>Ⓡ</SUP>. The comparison will imply that grafting a 2-axis additional axes equipment on to a 6-axis articulated robot make it possible to control a robot easily, to decrease the process route and the process time drastically, and to maximize robot efficiency.

2축 부가 축을 이용한 6축 수직 다관절로봇의 용접공정 효율 증대를 위한 연구

홍준락(Jun-Rak Hong),조현민(Hyeon-Min Jo),정원지(Won-Jee Chung),박승규(Seung-Kyu Park),노성훈(Seong-Hoon Noh) 한국기계가공학회 2017 한국기계가공학회지 Vol.16 No.6

This paper aims to realize additional axes, which increase the processing efficiency of a robot by controlling in harmful environments. Ultimately, this is to create time and energy savings in industrial sites with 6-axis articulated welding robots (RS2). Using RecurDyn<SUP>Ⓡ</SUP>, a simulation technique is applied. The motion paths of the welding rod are compared for two cases in order to verify the necessity of the additional axes: 1) when there are no additional axes and 2) when there are additional axes during welding using the RS2. For this purpose, the angle variations of the RS2 axes required for the simulation are compared, on the assumption that each of the four points of the welding bed installed on the additional axes of the welding rod in Solidworks<SUP>Ⓡ</SUP> is point-welded. Then, actual additional axes equipment is grafted on to the RS2 and the process times compared using LabVIEW<SUP>Ⓡ</SUP>.