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하지 동맥경화증의 수술 전 진단에서 고식적 혈관조영술과 다중검출 나선식 컴퓨터 혈관조영술의 비교
이강율(Kang Yool Lee),김일명(Il Myung Kim),유병욱(Byung Ook You),윤진(Jin Yoon),박상수(Sang Su Park),신동규(Dong Gue Shin),강성구(Sung Gu Kang),황호경(Ho Kyung Hwang),이성아(Sung A Lee) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.4
Purpose: We performed this study to assess the suitability of conventional angiography (CA) vs. multi-detector row helical CT angiogram (MD-CTA) as a method of preoperative diagnostic imaging for low extremity arterial surgery. Methods: From February 2004 to September 2006, 23 patients (4 claudicants, 19 limb-threatening ischemia) were studied with CA and MD-CTA preoperatively. The site and degree of stenotic or occlusive lesions in arterial segments from the renal artery to the dorsalis pedis artery were compared with both methods. We also compared the surgical inflow and outflow site changes in preoperative planning based on CA and MD-CTA and the final outcome. Additional diagnostic value and test-related complications were also analyzed. Results: The median age of patients was 68 years old (range: 43∼89 years), with a male to female ratio of 1.3:1. Twenty-three patients had CA after an MD-CTA scan. One hundred fifty lesions were detected in these patients. The total ratio of consistency for occlusion in CA vs. MD-CTA was 69.6%. Three patients received amputation treatment and eleven patients received a bypass operation. The agree ment between the preoperative plan based on MD-CTA and the final operation was 100%, even in critical limb ischemia. There were no serious complications related to the tests. Conclusion: These findings suggest that MD-CTA is an adequate preoperative imaging study of infrainguinal arterial surgery and may be substituted for conventional angiography without any serious complications.
서상기,이강율 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.12
Hot upsetting experiments were carried out in the temperature range 700-950℃ on steel powder preforms presintered at 700℃. The influence of hot upsetting temperature on the stress connected with phase transformation and restoration mechanism was specially studied by investigating hot deformation behavior and microstructure analysis. Following conclusions were drawn on the basis of the present study. -A deep minimum and maximum in stress were found in the temperature range 800-900℃ for almost all powder preforms. -The flow stress during hot upsetting was directly related to α-γ phase transformation. -The flow stress during hot upsetting was dependent on the amounts of high-strength austenite and low-strength ferrite for carbon added powder preforms. -Major restoration mechanism during hat deformation in the ferrite range is dynamic recovery.
갑상선 유두미세암에서 중심 림프절 전이를 예측할 수 있는 인자에 관한 분석
안소은,김준호,이강율,임영아,이연옥,김해성,김이수,So-Eun Ahn,Jun Ho Kim,Kang Yool Lee,Young-Ah Lim,Younok Lee,Hae Sung Kim and Lee Su Kim 대한갑상선-내분비외과학회 2012 The Koreran journal of Endocrine Surgery Vol.12 No.4
Purpose: Despite the excellent overall prognosis for patients with papillary thyroid microcarcinoma (PTMC), the rate of central lymph node (CLN) metastasis has been reported to be as great as 60% and the optimal surgical extent of PTMC has been controversial. The aim of this study is to identify factors for predict CLN metastasis in patients with PTMC. Methods: We conducted a retrospective study of 535 patients with PTMC who underwent total thyroidectomy with prophylactic CLN dissection between Jan. 2008 and Aug. 2011. We analyzed the association of CLN metastasis and clinicopathologic characteristics. Results: CLN metastasis was found in 181 patients (33.8%). Results of univariate analysis showed an association of younger than 45 years of age, male gender, a tumor size greater than 5 mm, bilaterality, multiplicity, extrathyroidal extension, and positivity of resection margin with CLN metastasis. Of these, results of multivariate analysis showed that age (P=0.003), gender (P=0.004), tumor size (P<0.001), extrathyroidal extension (P=0.001), and status of resection margin (P=0.002) were independent predictive factors for CLN metastasis. Conclusion: A large tumor size (>5 mm), male gender, young age (<45 yr), extrathyroidal extension, and positive resection margin were determined as the predictive factors for CLN metastasis, which occurred in approximately one third of patients with PTMC. Therefore, prophylactic CLN dissectionshould be considered in patients with PTMC who have these factors through investigation before surgery