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촬영 및 투시용 X선 장치의 기본안전과 필수 성능에 관한 개별 기준규격의 동향
노영훈(Young Hoon Roh),김정민(Jung Min Kim) 대한방사선과학회(구 대한방사선기술학회) 2015 방사선기술과학 Vol.38 No.4
식품의약품안전처 고시 「의료기기의 전기ㆍ기계적 안전에 관한 공통기준규격」이 IEC 60601-1 [3판] 따라 개정되었고 IEC-60601-1의 개별규격인 IEC 60601-2-54 또한 촬영 및 투시용 X선 장치의 기본 안전과 필수 성능에 관한 개별 기준규격으로 고시화 될 예정이다. 따라서 개별 규격의 도입에 앞서 주요 요건을 소개하고자 이 기술보고서를 작성하였다. IEC 60601-2-54의 목적은 촬영 및 투시를 위한 의료용 전기기기(이하 ME 기기) 및 ME 시스템에 요구되는 기본 안전과 필수 성능 요구사항을 확보하려는 것이다. IEC 60601-2-54는 방사선 촬영 및 투시장치의 X선 고전압장치, X선 기계장치, 방사선 방어 등에 관한 내용이다. 의료기기의 전기ㆍ기계적 안전에 관한 공통기준규격, 의료기기의 전자파 안전에 관한 공통기준규격, 의료기기의 방사선안전에 관한 보조기준 규격이 본 규격에 적용되었다. IEC-60601-2-54가 고시화될 경우 촬영 및 투시용 X선 장치의 기본 안전과 필수 성능에 관한 이해를 넓히고 국내 의료기기 산업의 국제화에 일조할 것이라고 판단된다. Medical electrical equipment - Part 1: General requirement for basic safety and essential performance of MFDS was revised as 3th edition and Medical electrical equipment Part 2-54: Particular requirements for the basic safety and essential performance of X-ray equipment will be expected to be announced as notification. Therefore this technical report was written to introduce provision of the particular require-ments, replacement, addition, amendment. The purpose of this particular requirements is to secure require-ments for basic safety and essential performance of X-ray equipment for radiography and radioscopy. X-ray high voltage generator, mechanical protective device, protection against radiation is included in this particular requirements. Medical electrical equipment - Part 1, Part 1-2, Part 1-3 is applied to this partic-ular requirements. If the requirements is announced as notification, It is expected to widen understanding for basic safety and essential performance of X-ray equipment for radiography and radioscopy and play a part to internationalize of medical equipments.
유문부 보존 췌십이지장 절제술시 공장 문합 술기에 따른 결과 비교
노영훈(Young Hoon Roh),김기환(Ki Hwan Kim),정갑중(Ghap Joong Jung),김영훈(Young Hoon Kim) 대한외과학회 2009 Annals of Surgical Treatment and Research(ASRT) Vol.77 No.2
Purpose: After performing pylous-preserving pancreaticoduodenectomy, there are several methods of performing pancreaticojejunostomy for preventing pancreatic leakage. The purpose of this study was to compare the results of two methods of jejunal anastomosis after pancreaticojejunostomy. Methods: We retrospectively evaluated the clinical results of 49 patients who had received pancreaticojejunostomy for pylous-preserving pancreaticoduodenectomy. One method is the Billroth-Ⅰ type, that is, choledochojejunostomy and pancreaticojejunostomy after anastomosis of one jejunum loop to the duodenum. The other method is the Roux-En-Y (R-Y) type. Choledochojejunostomy and pancreaticojejunostomy are done with an isolated jejunum loop. Then gastrojejunostomy is fashioned between the stomach and the distal jejunal segment. Finally, the end-to-side jejunojejunostomy is created. Results: The Billroth-Ⅰ type was used in 17 patients and the R-Y type was used in 32 patients. The median operation time was 397 min and 431 min, respectively. The median postoperative hospital day was 27.6 days and 22.1 days, respectively. The postoperative complications were 10 cases in 17 patients (58.8%) and 11 cases in 32 patients (34.4%), respectively. Leakage of the pancreaticojejunostomy was the most common complication in each group (23.5% and 15.6%, respectively). Most complications required no need surgical intervention. But two cases of Billroth-Ⅰ type complications needed total pancreatectomy because of leakage of the pancreaticojejunostomy. Conclusion: Not only were there fewer complications for the R-Y type than for the Billroth-Ⅰ type, but there was no need for operation to treat the complications of the R-Y type because of the isolated jejunal loop.
고분자 기반 코팅형 상아질 지각 과민 처치제의 효과에 대한 비교 연구
노영훈(Young-Hoon Roh),이주연(Joo-Yeon Lee),박현정(Hyun-Jung Park),최차남(Cha-Nam Choi),박윤정(Yoon-Jeong Park),구기태(Ki-Tae Koo),김태일(Tae-Il Kim),설양조(Yang-Jo Seol),이용무(Yong-Moo Lee),구영(Young Ku),류인철(In-Chul Rhyu),정종평( 대한치과의사협회 2008 대한치과의사협회지 Vol.46 No.11
Purpose : The aim of this study was to evaluate the clinical efficacy of two commercially available desensitizing agents over 3 weeks on patients with dentin hypersensitivity. Materials and Methods : An oxalate-based solution, Sensblok (NIBEC Inc. Seoul, Korea) & Superseal (Pheonix Inc. Michigan, USA), and a distilled water placebo were compared in a clinical setting. Seven volunteers exhibiting three or more teeth that were sensitive to tactile & air were enrolled in the study (35 teeth total). A visual analog scale (VAS) was used for recording each patient s level of sensitivity to tactile & air stimuli. A Florida probe was rubbed across the exposed dentin three times with a constant pressure 20 grams to measure the tactile stimulus. The air stimulus was generated by dental unit air syringe for 1-second blast from 1/2 inch distance. The desensitizing agents were applied according manufacture s guideline. VAS scores were recorded at baseline, 1 minute after treatment, at 1 week, 2weeks, 3weeks. VAS score were analyzed using a repeated measures ANOVA (α=0.05). Results : The Sensblok, Superseal, and distilled water placebo all decreased dentin sensitivity. A statistically significant difference existed between Sensblok and placebo when tactile stimulus was applied (P<0.05), but no significant difference was found among other desensitizing agents and tactile and air stimuli.
단일기관에서 시행한 2,000예 이상의 복강경 담낭 절제술에 대한 임상적 분석
안영주(Young Joo An),김영훈(Young Hoon Kim),정갑중(Ghap Joong Jung),김성흔(Sung Heun Kim),노영훈(Young Hoon Roh) 대한외과학회 2009 Annals of Surgical Treatment and Research(ASRT) Vol.76 No.6
Purpose: Laparoscopic cholecystectomy has become the standard modality of acute and chronic gallbladder disease. This study was performed to evaluate a change in the indication for laparoscopic cholecystectomy according to period by analyzing our experiences. Methods: We retrospectively analyzed 2,096 cases of laparoscopic cholecystectomy that were treated at the Department of Surgery, Dong-A University. They were divided into 3 groups from October 1992 to December 1996 (Group 1), from January 1997 to December 2001 (Group 2) and from January 2002 to March 2007 (Group 3). Results: The mean age was 50.14±13.89 years and the male-to-female ratio was 1:1.23. Previous abdominal surgery was noted in 12.24% from Group 1, 14.96% from Group 2 and 21.48% from Group 3. Chronic cholecystitis was the most common pathologic diagnosis in all cases. However, while the incidence of acute cholecystitis and gallbladder empyema in Group 1 was 3.36% and 0%, that of Group 2 was 12.52% and 3.88% and that of Group 3 was 31.79% and 7.59%, which was increased. The mean operation time of each group was 101.00±51.00, 69.86±40.55, 78.01±45.55 minutes (P<0.05). The conversion rate of each group was nine cases (6.04%), 21 cases (3.02%), and 51 cases (4.07%). The surgical complication rate was 7.38%, 3.88% and 4.71%, respectively. The length of hospital stay was 6.08±3.65, 3.16±2.99 and 2.91±3.34 days, which was significantly decreased (P<0.05). Conclusion: As surgical experience increased and laparoscopic surgical skills developed, the indication for laparoscopic cholecystectomy changed. The results of this study showed that laparoscopic cholecystectomy was feasible for the treatment of complicated gallbladder lesion.
김기환(Ki Hwan Kim),노영훈(Young Hoon Roh),김영훈(Young Hoon Kim),정갑중(Ghap Joong Jung),안원석(Won Suk An),김성은(Sung Eun Kim),김기현(Ki Hyun Kim) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.2
Purpose: Continuous ambulatory peritoneal dialysis (CAPD) is an important method of performing renal replacement therapy in patients with chronic renal failure. A significant complication of CAPD is malfunction of the catheter because of catheter adhesion that leads to catheter malposition. So we evaluated the effect of an anti-adhesive agent called Guardix-Sol<SUP>ⓡ</SUP>. Methods: We prospectively evaluated the clinical results of 78 patients who had received CAPD catheter insertion from Sep. 2007 to May 2009. A test group of 34 patients used the anti-adhesion agent and a control group of 44 patients did not use it. All the procedures were standardized and performed by a single surgeon. Results: The patients consisted of 49 males and 29 females. The common reasons for CAPD insertion were diabetic nephropathy (47 patients) and hypertension (20 patients). Fifteen patients needed reposition operations during their postoperative course, which were done under spinal anesthesia. Out of 15 patients, 3 were from the test group (Guardix-Sol<SUP>ⓡ</SUP> group) and 12 from the control group (P=0.0526). All the repositioned patients had a malpositioned catheter because the greater omentum had adhered to the catheter, except for one patient in each group (P=0.0315). Conclusion: Using an anti-adhesive agent for CAPD insertion is an effective method to reduce the incidence of greater omental adhesion. So the rate of reoperation cases for catheter repositioning is decreased.