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이학재,최지윤,한영진,조용필,권태원 대한혈관외과학회 2013 Vascular Specialist International Vol.29 No.4
Purpose: The tortuosity of the iliac artery and length of the common iliac artery are considered to be limiting factors when performing endovascular aneurysm repair (EVAR). The aim of this study was to determine the anatomical features of the common iliac artery in patients who underwent EVAR. Methods: Common iliac artery tortuosity was retrospectively assessed in 144 abdominal aortic aneurysm (AAA) patients (127 men; mean age, 70 years) treated from April 2007 to March 2011. Median luminal centerline measurements of 288 iliac arteries were made on preoperative computed tomography images using a three-dimensional workstation. Results: The mean aneurysm diameter (±standard deviation) was 56.83±11.31 mm. The mean tortuosity index was 1.4287±0.1808. Five variables were significantly associated with the tortuosity ratio: age (r=0.216,P=0.009), diabetes mellitus (r=−0.215, P=0.010), smoking (r=−0.212, P=0.011), height (r=−0.169, P=0.043),and body mass index (r=−0.215, P=0.010). Procedure time and tortuosity were weakly correlated (r=0.166,P<0.05). Of the 70 cases with EVAR-related complications, there were 19 graft-related complications. There was no correlation found between iliac tortuosity and graft-related complications. Conclusion: A high degree of iliac artery tortuosity can be a limiting factor that increases the procedure time required for endovascular treatment of AAA. Measurement of iliac tortuosity is feasible and clinically meaningful, and its role in relation to human assessment must be further defined.
益胃升陽湯 및 加減方이 家兎의 摘出腸管 運動에 미치는 影響
李學宰,盧永範,柳道坤,韓宗鉉,康舜洙 圓光大學校 韓醫學硏究所 1992 원광한의학 Vol.2 No.1
In order to investigate the action of Radix Bupleuri and Radix Cimicifugae in Yikwiserugyangtang(益胃升陽湯), Yikwiseungyangtang was divided into six samples : Sample Ⅰ : Yikwiseungyangtang Sample Ⅱ : Water extract of Yikwiseungyangtang excluded R.Bupleuri and R.Cimicifugae. Sample Ⅲ : Water extract of Yikwiseungyangtang excluded R.Cimicifugae. Sample Ⅳ : Water extract of Yikwiseungyangtang excluded R.Bupleuri. Sample Ⅴ : Water extract of Yikwiseungyangtang increased R.Bupleuri and R.Cimicifugae to 3.75g Sample Ⅵ : Water extract of R.Bupleuri and R.Cimicifuage. Effects of Yikwiseungyangtang and its variants on the contractile force of isolated rabbit ileums are as follows : 1. Yikwiseungyangtang was significantly increased the contractile force of isolated rabbits ileum. 2. The contractile of Yikwiseungyangtang was significantly inhibited by atropine. 3. The contractile force of Yikwiseungyangtang was not inhibited by cyproheptadine. 4. In the contraction of Norepinephrine(10^-3M), Sample Ⅱ, Sample Ⅵ and Sample Ⅴ were increased the contractile force than that of Sample Ⅰ. 5. In the contraction of acetylcholine (10^-3M), no change observed in contractile force than that of Sample Ⅰ.
정비대체장비(M/F) 소요산출 방법비교 및 검증방안 연구
이학재,김재황,정재우,서무경,권기상,Lee, Hak-Jae,Kim, Jae-Hwang,Jung, Jae-Woo,Seo, Mu-Kyung,Kwon, Ki-Sang 한국신뢰성학회 2018 신뢰성응용연구 Vol.18 No.2
Purpose: In this paper, we propose calculation methods of Maintenance Float (M/F). Results of each method are compared and verified by using commercial tool (OPUS Suite). As modern weapon systems become more expensive, we need to find the most economical and efficient method to achieve the target operational availability (Ao). Methods: Three kinds of methods (Considering the number of CSP, Applying the Poisson distribution, and Applying M&S Tool) are used to find the number of M/F. Three methods (Considering the number of CSP, Applying the Poisson distribution, and Applying M&S Tool) were used to estimate the required number of M/F. The analysis results were verified by SIMLOX. The cost of equipment calculated by each analysis method was compared and the cause of the difference was analyzed. Conclusion: Ao and cost must be considered to find the optimal number of M/F. In general, it costs more to increase availability. But the cost is not necessarily proportional to Ao. Therefore, it is better to compare the calculation method and determine the final MF quantity.