Surgical Options for Appropriate Length of J-Pouch Construction for Better Outcomes and Long-term Quality of Life in Patients with Ulcerative Colitis after Ileal Pouch-Anal Anastomosis

Xu Weimin,Tang Wenbo,Ding Wenjun,Hua Zhebin,Wang Yaosheng,Ge Xiaolong,Cui Long,Wu Xiaojian,Zhou Wei,Ding Zhao,Du Peng 거트앤리버 소화기연관학회협의회 2024 Gut and Liver Vol.18 No.1

Background/Aims: Total proctocolectomy with ileal pouch-anal anastomosis (IPAA) is widely accepted as a radical surgery for refractory ulcerative colitis (UC). Definite results on the appropriate pouch length for an evaluation of the risk-to-benefit ratio regarding technical complications and long-term quality of life (QOL) are still scarce. Methods: Data on UC patients who underwent IPAA from 2008 to 2022 in four well-established pouch centers affiliated to China UC Pouch Center Union were collected. Results: A total of 208 patients with a median follow-up time of 6.0 years (interquartile range, 2.3 to 9.0 years) were enrolled. The median lengths of the patients’ short and long pouches were 14.0 cm (interquartile range, 14.0 to 15.0 cm) and 22.0 cm (interquartile range, 20.0 to 24.0 cm), respectively. Patients with a short J pouch configuration were less likely to achieve significantly improved long-term QOL (p=0.015) and were prone to develop late postoperative complications (p=0.042), such as increased defecation frequency (p=0.003) and pouchitis (p=0.035). A short ileal pouch was an independent risk factor for the development of late postoperative complications (odds ratio, 3.100; 95% confidence interval, 1.519 to 6.329; p=0.002) and impaired long-term QOL improvement (odds ratio, 2.221; 95% confidence interval, 1.218 to 4.050, p=0.009). Conclusions: The length of the J pouch was associated with the improvement in long-term QOL and the development of late post-IPAA complications. A long J pouch configuration could be a considerable surgical option for pouch construction.

Can Robotic Gastrectomy Surpass Laparoscopic Gastrectomy by Acquiring Long-Term Experience? A Propensity Score Analysis of a 7-Year Experience at a Single Institution

홍성수,손상용,신호정,Long-Hai Cui,허훈,한상욱 대한위암학회 2016 Journal of gastric cancer Vol.16 No.4

Purpose: It is hypothesized that robotic gastrectomy may surpass laparoscopic gastrectomy after the operators acquire long-term experience and skills in the manipulation of robotic arms. This study aimed to evaluate the long-term learning curve of robotic distal gastrectomy (RDG) for gastric cancer compared with laparoscopic distal gastrectomy (LDG). Materials and Methods: From October 2008 to December 2015, patients who underwent LDG (n=809) were matched to patients who underwent RDG (n=232) at a 1:1 ratio, by using a propensity score matching method after stratification for the operative year. The surgical outcomes, such as trends of operative time, blood loss, and complication rate, were compared between the two groups. Results: The RDG group showed a longer operative time (171.3 minutes vs. 147.6 minutes, P<0.001) but less estimated blood loss (77.6 ml vs. 116.6 ml, P<0.001). The complication rate and postoperative recovery did not differ between the two groups. The RDG group showed a longer operative time and similar estimated blood loss compared with the LDG group after 5 years of experience (operative time: 159.2 minutes vs. 136.0 minutes in 2015, P=0.003; estimated blood loss: 72.9 ml vs. 78.1 ml in 2015, P=0.793). Conclusions: In terms of short-term surgical outcomes, RDG may not surpass LDG after a long-term experience with the technique.

Can Robotic Gastrectomy Surpass Laparoscopic Gastrectomy by Acquiring Long-Term Experience? A Propensity Score Analysis of a 7-Year Experience at a Single Institution

Hong, Sung-Soo,Son, Sang-Yong,Shin, Ho-Jung,Cui, Long-Hai,Hur, Hoon,Han, Sang-Uk The Korean Gastric Cancer Association 2016 Journal of gastric cancer Vol.16 No.4

Purpose: It is hypothesized that robotic gastrectomy may surpass laparoscopic gastrectomy after the operators acquire long-term experience and skills in the manipulation of robotic arms. This study aimed to evaluate the long-term learning curve of robotic distal gastrectomy (RDG) for gastric cancer compared with laparoscopic distal gastrectomy (LDG). Materials and Methods: From October 2008 to December 2015, patients who underwent LDG (n=809) were matched to patients who underwent RDG (n=232) at a 1:1 ratio, by using a propensity score matching method after stratification for the operative year. The surgical outcomes, such as trends of operative time, blood loss, and complication rate, were compared between the two groups. Results: The RDG group showed a longer operative time (171.3 minutes vs. 147.6 minutes, P<0.001) but less estimated blood loss (77.6 ml vs. 116.6 ml, P<0.001). The complication rate and postoperative recovery did not differ between the two groups. The RDG group showed a longer operative time and similar estimated blood loss compared with the LDG group after 5 years of experience (operative time: 159.2 minutes vs. 136.0 minutes in 2015, P=0.003; estimated blood loss: 72.9 ml vs. 78.1 ml in 2015, P=0.793). Conclusions: In terms of short-term surgical outcomes, RDG may not surpass LDG after a long-term experience with the technique.

일반논문 : 선박우선특권 및 저당권제도에 관한 연구

최용철 ( Long Zhe Cui ) 건국대학교 법학연구소 2014 一鑑法學 Vol.0 No.28

Korea commercial law of security on ship system has centrally regulated the maritime lien. The maritime lien has always taken priority over the ship mortgage. Both of them play an assistant role in shipping for maritime corporation and protect the creditors. But two systems have effected in the opposite direction. The more maritime lien applicants there are, the more the value of ship and also the function of the ship mortgage go down. It is a great fear that there are no public notice in the maritime lien so the maritime lien may suddenly be exercised when the mortgaged ship is in a business shipping. Although The ship mortgage is be appropriated to long-term ship financing like construction payment or raising operating funds. The maritime lien has bad influence on the role of ship mortgage. Moreover, it may hinder the maritime corporations and the national economical developments. The writer provides related improvement scheme for relieving these problems.

Risk Factors of Colorectal Stricture Associated with Developing High-Grade Dysplasia or Cancer in Ulcerative Colitis: A Multicenter Long-term Follow-up Study

Weimin Xu,Wenjun Ding,Yubei Gu,Long Cui,Jie Zhong,Peng Du 거트앤리버 소화기연관학회협의회 2020 Gut and Liver Vol.14 No.5

Background/Aims: The risk factors of colorectal stricture associated with ulcerative colitis (UC) carcinogenesis in the long-term disease duration remain unclear. Methods: This study included all UC patients registered from a prospectively maintained database between June 1986 to July 2018. The demographic data, clinical features, and outcomes in patients with dysplasia and stricture were assessed using univariable analysis and multivariate logistic regression models. Results: A total of 246 eligible patients were included in the analysis. The median follow-up time was 13.0 years (interquartile range [IQR], 9.0 to 16.0). There were 35 cases (14.2%) of colorectal stricture. Patients with stricture had worse clinical outcomes. Stricture formation (odds ratio [OR], 9.350; 95% confidence interval [CI], 2.842 to 30.762), inflammatory polyps (OR, 5.464; 95% CI, 1.692 to 17.638), disease duration of more than 10 years (OR, 3.223; 95% CI, 1.040 to 9.985), and age >40 years at diagnosis (OR, 8.499; 95% CI, 1.903 to 37.956) were significantly associated with high-grade dysplasia or colorectal cancer. In addition, disease duration of more than 5 years (OR, 3.211; 95% CI, 1.168 to 8.881), moderated anemia (OR, 3.373; 95% CI, 1.472 to 7.731), and primary sclerosing cholangitis (OR, 5,842; 95% CI, 1.395 to 24.468) were contributing factors for the development of colorectal stricture. Conclusions: Colorectal stricture had the highest risk for malignant transformation. Earlier initiation of colonoscopic surveillance in UC patients with risk factors for stricture should be considered to prevent stricture formation and further malignant transformation.

Thermodynamic simulation and structural optimization of the collimator in the drift duct of EAST-NBI

Tang Ning,Hu Chun-dong,Xie Yuan-lai,Wei Jiang-long,Cui Zhi-Wei,Xie Jun-Wei,Pan Zhuo,Jiang Yao 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.11

The collimator is one of the high-heat-flux components used to avoid a series of vacuum and thermal problems. In this paper, the heat load distribution throughout the collimator is first calculated through experimental data, and a transient thermodynamic simulation analysis of the original model is carried out. The error of the pipe outlet temperature between the simulated and experimental values is 1.632%, indicating that the simulation result is reliable. Second, the model is optimized to improve the heat transfer performance of the collimator, including the contact mode between the pipe and the flange, the pipe material and the addition of a twisted tape in the pipe. It is concluded that the convective heat transfer coefficient of the optimized model is increased by 15.381% and the maximum wall temperature is reduced by 16.415%; thus, the heat transfer capacity of the optimized model is effectively improved. Third, to adapt the long-pulse steady-state operation of the experimental advanced superconducting Tokamak (EAST) in the future, steady-state simulations of the original and optimized collimators are carried out. The results show that the maximum temperature of the optimized model is reduced by 37.864% compared with that of the original model. The optimized model was changed as little as possible to obtain a better heat exchange structure on the premise of ensuring the consumption of the same mass flow rate of water so that the collimator can adapt to operational environments with higher heat fluxes and long pulses in the future. These research methods also provide a reference for the future design of components under high-energy and long-pulse operational conditions

A New Erythrinan Alkaloid from the Seed of Erythrina addisoniae

Long Cui,Won Keun Oh,Phuong Thien Thuong,Z. Tanee Fomum 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.3

Phytochemical study on the EtOAc extract of the seed of Erythrina addisoniae (Leguminosae) resulted in the isolation of a new erythrinan alkaloid, erysovine-N-oxide (1), along with eight known alkaloids, erysosalvinone (2), erysodine (3), 1H-indole-3-propanamide (4), glucoerysodine (5), erysotrine (6), erysovine (7), erythraline (8) and erysopine (9). Their chemical structures were identified on the basis of physicochemical and spectroscopic analyses.

Language Research in International Business: An Author Co-citation Analysis

Long Cui(최룡),Chao Ma(마차오),Jongwook Kwon(권종욱) 연세대학교 경영연구소 2020 연세경영연구 Vol.57 No.3

국제 비즈니스(IB) 연구 분야의 언어 관련 연구가 급증하고 있으며, 현재 많은 학자들이 언어를 중요한 테마의 하나로 다루고 있다. 국제 비즈니스(IB) 영역에서 언어와 관련된 연구가 증가하고는 있으나, 연구 주제가 가지고 있는 본연의 복잡성을 경험적 측면과 이론적 측면에서 개념화를 하기 위한 실질적인 도전에 직면해 있는 상황이다. 이에 국제 비즈니스(IB)의 언어와 관련한 연구방법에 대하여 문헌분석방법 등을 적용한 새로운 방법을 제안하는 바이다. 이는 학문 간의 경계를 뛰어넘는 언어의 고유 특성을 고려하여 타학문 간의 연계성을 가지고 있는 이론의 시각을 통해 국제 비즈니스(IB) 영역의 언어에 대하여 좀 더 심도 있는 이해와 연구 결과를 얻을 수 있었다. 본 연구는 국제 비즈니스(IB) 분야의 주요 논문 222편(1975년~2016년)에 대하여 문헌분석을 진행하였다. 그 결과 전통적인 문헌 분석방법에 비해 좀 더 심도 있는 분석 결과를 얻을 수 있었으며, 언어에 대한 정치적·구조적·문화적 이해 세 가지의 논점을 발견하였다. 본 세 가지의 논점은 16개 국제 비즈니스(IB) 학회지의 “언어에 대한 연구방향”을 비교분석하여, 타 연구 분야의 연구 방향과의 유사성을 확인하고 후속 연구의 방향을 제시하였다. The number of articles regarding language in international business (IB) research fields has rapidly increased, and many scholars now consider language an important research topic in these fields. Despite the increased study of language in IB fields, scholars continue to be faced with substantial challenges for empirically and theoretically conceptualizing the complexity of this research theme. Thus, we recommend that studies regarding language in IB adopt new methodologies such as bibliometric methods. In addition, language studies should transcend disciplinary boundaries and draw from and integrate various theories from other disciplines such as communication to gain a more profound understanding of language in international business. Our bibliometric study of 222 articles published in the top international business journals from 1975 to 2016 permits deeper analyses than traditional literature reviews. We identify three main research trends: the political view of language, the instrumental view of language and the cultural view of language. In addition, we compared the research trends of language in IB journals with that of 16 communication journals to determine whether similarities exist between the research trends of IB and other research fields. In addition, we suggest which topics should be analysed in future IB studies.

Six Degree-of-freedom Hydraulic Hexapod Platform for Large-amplitude Vibration Isolation

Long Cui,Hai Huang,Ze Zhang,Haiqiang Wang 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10

High resolution optical equipment needs a low noise environment, to realize high precision pointing and tracking function. However, the vehicular optical equipment will be influenced by the disturbance of vehicle body when the vehicle is moving. To solve this problem, a large stroke vibration isolation Hexapod platform with hydraulic actuator was proposed. A prototype platform and an experiment system were built, and performance test and vibration isolation experiment were carried out. The experiment result shows that the amplitude of the sinusoidal vibration was reduced by 90% in 4 ~ 20Hz frequency band and the peak-peak value of the random vibration was reduced by 75%.

Correlations of Tumor-associated Macrophage Subtypes with Liver Metastases of Colorectal Cancer

Cui, Yun-Long,Li, Hui-Kai,Zhou, Hong-Yuan,Zhang, Ti,Li, Qiang Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.2

Objective: This work aimed to investigate the correlations of tumor-associated macrophages (TAMs) and their subtypes M1 and M2 with liver metastasis of colorectal cancer, and provide useful references for seeking predictors of liver metastasis and studying mechanisms. Methods: 120 patients with colorectal cancer from 2000 to 2009 were divided into low, middle and high liver metastasis groups (group A, B and C, respectively). S-P immunohistochemical staining and microscopic observation were conducted to compare expression in CD68-positive cells (TAMs), CD80-positive cells (M1) and CD163-positive cells (M2) in three groups. Correlations of TAMs, M1, M2, and M2/M1 ratio with clinical and pathological parameters were analyzed. Results: With increase of liver metastatic ability, the number of TAMs decreased gradually, with no significant difference between any two of the three groups (P > 0.05), while the numbers of M1 and M2 were significantly decreased and increased, respectively, with significant difference between any two of three groups (P < 0.05 or P < 0.01). In addition, the M2/M1 ratio increased with increase of liver metastatic ability (P < 0.01). There was no statistical significance of correlation of TAMs with each clinical and pathological parameter. M1 was negatively related with lymphatic metastasis and liver metastatic ability. M2 was positively correlated with preoperative CEA level, lymphatic metastasis, tumor differentiation degree and liver metastatic ability. The same was the case for the M2/M1 ratio. Conclusions: Effects of TAMs on liver metastasis of colorectal cancer do not depend on the total number of TAMs, but on the number and proportion of functional subtypes M1 and M2. M2 number and M2/M1 ratio are more accurate predictors for liver metastasis of colorectal cancer.