scholarly journals Safety and Feasibility of Novel Reconstruction Method Using Long and Narrow Cobra- Head- Shaped Gastric Tube in Laparoscopic Proximal Gastrectomy for Cancer

2021 ◽  
Author(s):  
Yoshitake Ueda ◽  
Takahide Kawasaki ◽  
Sanshi Tanabe ◽  
Kosuke Suzuki ◽  
Shigeo Ninomiya ◽  
...  
Keyword(s):  
Conventional Method ◽  
Gastric Tube ◽  
Proximal Gastrectomy ◽  
Linear Stapler ◽  
Reconstruction Method ◽  
The Novel ◽  
Laparoscopic Proximal Gastrectomy ◽  
Direct Anastomosis ◽  
Novel Method ◽  
Method Group

Abstract Background. To clarify the safety and feasibility of laparoscopic proximal gastrectomy (LPG) with our novel reconstruction methods, clinical outcomes of this LPG were evaluated and compared to those of LPG with our conventional method. Methods. Novel method is a reconstruction with a long and narrow gastric tube with widening of the proximal side of the gastric tube created by linear stapler. Esophagogastrostomy is performed by direct anastomosis with overlap method between the posterior wall of the esophagus and anterior wall of the gastric tube using a linear stapler. In conventional method, direct anastomosis between the esophagus and a gastric tube by a circular stapler was performed. Short- and long-term outcomes of a novel method were compared with those of conventional method. Results. A total of 39 patients whom LPG was performed were enrolled in this retrospective study. The amount of blood loss in the Novel method group (n=30) was significantly less than those in the Conventional method group (n=9) (40 vs. 110 ml, p<0.01). No cases of anastomotic leakage and stenosis were observed in both groups. The cases of postoperative reflux esophagitis at 1 year after operation in the Novel group were less than those in the Conventional group (10% vs. 33%). In the Novel group, postoperative recurrence was observed in 2 patients (7%). Conclusions. LPG with novel reconstruction method using long and narrow cobra- head-shaped gastric tube can be easily performed, and may be feasible for the treatment of gastric cancer in the upper third of the stomach.

Optimization of Bending Process of Large Marine Crankthrow by Computer Simulation

2007 ◽  
Vol 561-565 ◽  
pp. 1949-1952 ◽  
Author(s):  
Ming Yue Sun ◽  
Shan Ping Lu ◽  
Dian Zhong Li ◽  
Yi Yi Li
Keyword(s):  
Computer Simulation ◽  
Conventional Method ◽  
Transformation Method ◽  
Actual Process ◽  
The Novel ◽  
Fem Model ◽  
Maximum Resistance ◽  
Bending Process ◽  
Novel Method ◽  
Simulation Results

The conventional method of bending the large crankthrow was investigated by computer simulation combined with manufacturing trial, and the typical forging defects, such as constricted waist, folded cracks and horn mouth on forged blank were analyzed. On the basis of these results, a novel forging shape of preformed blank was proposed using anti-transformation method by computer simulation. The FEM simulated results show that all the above defects can be avoided by carrying out the novel method, furthermore, the maximum resistance of the novel bending deformation was reduced to 72% of conventional process, and the weight of forging blank can be decreased by 15%. Finally, the optimum forging shape was applied to the actual process, the simulation results were confirmed by manufacturing trial, and qualified forged piece was gained. The FEM model established can be used for further optimization of other types of crankthrow.

scholarly journals Laparoscopic proximal gastrectomy with a hand-sewn esophago-gastric anastomosis using a knifeless endoscopic linear stapler

2012 ◽  
Vol 16 (2) ◽  
pp. 268-274 ◽  
Author(s):  
Hiroshi Okabe ◽  
Kazutaka Obama ◽  
Eiji Tanaka ◽  
Shigeru Tsunoda ◽  
Masatoshi Akagami ◽  
...  
Keyword(s):  
Proximal Gastrectomy ◽  
Linear Stapler ◽  
Laparoscopic Proximal Gastrectomy ◽  
Endoscopic Linear Stapler ◽  
Gastric Anastomosis

scholarly journals Laparoscopic Proximal Gastrectomy With Gastric Tube Reconstruction

2016 ◽  
Vol 20 (3) ◽  
pp. e2016.00046 ◽  
Author(s):  
Yoshitake Ueda ◽  
Norio Shiraishi ◽  
Manabu Toujigamori ◽  
Hidefumi Shiroshita ◽  
Tsuyoshi Etoh ◽  
...  
Keyword(s):  
Gastric Tube ◽  
Proximal Gastrectomy ◽  
Laparoscopic Proximal Gastrectomy ◽  
Gastric Tube Reconstruction

scholarly journals Localization of Light in Photonics Lattices for All-Optical Representation of Binaries

2021 ◽  
Vol 9 ◽  
Author(s):  
Dan T. Nguyen ◽  
Daniel A. Nolan ◽  
Nicholas F. Borrelli
Keyword(s):  
Conventional Method ◽  
Nonlinear Interaction ◽  
Optical Nonlinearity ◽  
Integrated Photonics ◽  
The Novel ◽  
Binary Logic ◽  
All Optical ◽  
Working Principle ◽  
Novel Method ◽  
On Chip

In this paper we present a novel conceptual method for all optical representation of binary numbers that could be used for all-optical binary logic components in optical digital computing, as well as for other applications. The new concept is based on effect of localization of light in specially designed binary photonics lattices whose central parts resemble the represented binaries, and the localizations occur due to breaking periodicities of the lattices. The proposed structures can be made with integrated photonics on-chip that are highly programmable and controllable. Most significantly, the working principle of the novel method doesn’t require nonlinear interaction between light and material, which is the most serious obstacle in the conventional method that uses optical transistors whose mechanism relies mainly on optical nonlinearity. We will discuss some technical challenges in developing the components.

scholarly journals Comparative analysis of laparoscopic proximal gastrectomy plus semi-embedded valve anastomosis with laparoscopic total gastrectomy for adenocarcinoma of the esophagogastric junction: a single-center retrospective cohort study

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Yupeng Wu ◽  
Shihao Zhang ◽  
Liting Wang ◽  
Xuya Hu ◽  
Zhanxue Zhang
Keyword(s):  
Weight Loss ◽  
Total Gastrectomy ◽  
Reflux Esophagitis ◽  
Esophagogastric Junction ◽  
Proximal Gastrectomy ◽  
Laparoscopic Total Gastrectomy ◽  
Reconstruction Method ◽  
Postoperative Reflux ◽  
Significant Difference ◽  
Laparoscopic Proximal Gastrectomy

Abstract Background We invented a new antireflux anastomosis method for use in proximal gastrectomy for adenocarcinoma of the esophagogastric junction (AEG) and named it semi-embedded valve anastomosis (SEV). This study was conducted to compare and analyze the short-term efficacy and long-term prognosis of this anastomosis reconstruction method versus laparoscopic total gastrectomy (LTG). Methods We retrospectively analyzed the general data and surgical outcomes of patients with AEG who underwent three united laparoscopic proximal gastrectomy plus semi-embedded valve anastomosis (TULPG-SEV, N = 20) and LTG (N = 20) at our hospital from January 2015 to September 2017 and investigated the incidence of postoperative reflux esophagitis and postoperative nutritional status between the two groups. Survival analysis was also performed. Results The operative time (178.25 ± 15.41 vs 196.5 ± 21.16 min) and the gastrointestinal reconstruction time (19.3 ± 2.53 vs 34.65 ± 4.88 min) of the TULPG-SEV group were significantly less than that of the LTG group. There was no difference in intraoperative blood loss, length of hospital stay, and postoperative complications. There was no difference in the scores on the postoperative reflux disease questionnaires (RDQs) conducted 1 month (P = 0.501), 3 months (P = 0.238), and 6 months (P = 0.655) after surgery between the TULPG-SEV group and LTG group. Gastroscopy revealed 2 cases of reflux esophagitis (grade B or higher) in each group. The postoperative hemoglobin level was better in the TULPG-SEV group than in the LTG group, and the difference was most noticeable at 1 month after surgery (P = 0.024) and 3 months after surgery (P = 0.029). The levels of albumin and total protein were not significantly different between the groups. There were more patients with weight loss over 5 kg after surgery in the LTG group than in the TULPG-SEV group (P = 0.043). There was no significant difference in the 3-year overall survival rate between the two groups (P = 0.356). Conclusion SEV has a certain antireflux effect and can reduce the anastomosis time. Proximal gastrectomy may be better than total gastrectomy for maintaining postoperative hemoglobin levels and reducing weight loss.

A novel method for the determination of linting propensity of paper

TAPPI Journal ◽  
2012 ◽  
Vol 11 (10) ◽  
pp. 9-17
Author(s):  
ALESSANDRA GERLI ◽  
LEENDERT C. EIGENBROOD
Keyword(s):  
Ash Content ◽  
The Novel ◽  
Offset Printing ◽  
Excellent Correlation ◽  
End Conditions ◽  
Bottom Side ◽  
Novel Method ◽  
Total Fraction

A novel method was developed for the determination of linting propensity of paper based on printing with an IGT printability tester and image analysis of the printed strips. On average, the total fraction of the surface removed as lint during printing is 0.01%-0.1%. This value is lower than those reported in most laboratory printing tests, and more representative of commercial offset printing applications. Newsprint paper produced on a roll/blade former machine was evaluated for linting propensity using the novel method and also printed on a commercial coldset offset press. Laboratory and commercial printing results matched well, showing that linting was higher for the bottom side of paper than for the top side, and that linting could be reduced on both sides by application of a dry-strength additive. In a second case study, varying wet-end conditions were used on a hybrid former machine to produce four paper reels, with the goal of matching the low linting propensity of the paper produced on a machine with gap former configuration. We found that the retention program, by improving fiber fines retention, substantially reduced the linting propensity of the paper produced on the hybrid former machine. The papers were also printed on a commercial coldset offset press. An excellent correlation was found between the total lint area removed from the bottom side of the paper samples during laboratory printing and lint collected on halftone areas of the first upper printing unit after 45000 copies. Finally, the method was applied to determine the linting propensity of highly filled supercalendered paper produced on a hybrid former machine. In this case, the linting propensity of the bottom side of paper correlated with its ash content.

Sign in / Sign up

Export Citation Format

Share Document