BACKGROUND Esophageal gastric anastomosis is a common surgical technique used to treat patients with gastric cancer who undergo total gastrectomy.However,using simple anastomosis techniques alone may not meet the need...BACKGROUND Esophageal gastric anastomosis is a common surgical technique used to treat patients with gastric cancer who undergo total gastrectomy.However,using simple anastomosis techniques alone may not meet the needs of patients in some cases and can lead to complications such as anastomotic stenosis and ulceration.In order to overcome these issues and improve patient prognosis,muscle flap reconstruction technique has emerged.Muscle flap reconstruction is a method of improving gastric-esophageal anastomosis by transplanting muscle tissue.By covering the anastomotic site with muscle tissue,it not only enhances the stability of the anastomosis site but also increases blood supply,promoting healing and recovery of the anastomosis.Therefore,the use of muscle flap reconstruction technique in esophageal gastric anastomosis during total gastrectomy for gastric cancer is increasingly widely applied.AIM To determine the effectiveness of esophagogastric anastomosis using the muscle flap reconstruction technology in total abdominal gastrectomy for gastric cancer and perform follow-up experiments to understand the factors affecting patients’prognosis.METHODS The study subjects were 60 patients with gastric cancer who were admitted to our hospital between October 2018 and January 2022.All patients underwent esopha-gogastric anastomosis using the double muscle flap reconstruction technology in total abdominal gastrectomy.Perioperative indicators were determined,and INTRODUCTION Gastric cancer is one of the most common tumors of the digestive system worldwide.Although gastric cancer may not have significant manifestations in the early stage,as the disease progresses,systemic symptoms such as emaciation,anemia,and gastric perforation are observed[1].Surgery is the main treatment strategy for gastric cancer.With recent advances in total laparoscopy,total laparoscopic radical resection has gradually become an important treatment strategy for gastric cancer.Conventional laparoscopic surgery may require at least 5-6 incisions,whereas total laparoscopic surgery requires only 3-4 small incisions,decreasing surgical trauma and postoperative pain[2].Furthermore,because total laparoscopic surgery is less invasive than conventional laparoscopic surgery,patients can generally return to normal living and working conditions more quickly[3].Moreover,total laparoscopic surgery does not leave obvious surgical scars;therefore,it is advantageous for patients who pay attention to appearance[4].Esophagogastrostomy is a method used to repair gastrointestinal anastomosis,called the“double muscle valve”.This technique requires folding the fundus of the stomach,followed by sealing it with two layers of tissue,forming a structure similar to a valve.The application of esophagogastrostomy to total laparoscopic radical resection for gastric cancer can effectively decrease the incidence of complications such as anastomotic incontinence and bile reflux and improve the surgical cure rate and postoperative quality of life,which is a recent topic of interest for surgeons.At present,systematic multivariate analyses of the application effects of esophagogastrostomy in total laparoscopic surgery for gastric cancer and their effects on prognosis remain scarce[5].In the present study,we conducted surgery and postoperative follow-up of patients with gastric cancer and collected relevant clinical data for esophagogastric anastomosis during postoperative resection for gastric cancer to ACKNOWLEDGEMENTS I would like to express my sincere thanks to all those who participated in the manuscript.展开更多
The artificial viscosity in the traditional smoothed particle hydrodynamics （SPH） methodology concerns some empirical coefficients, which limits the capability of the SPH methodology. To overcome this disadvantage a...The artificial viscosity in the traditional smoothed particle hydrodynamics （SPH） methodology concerns some empirical coefficients, which limits the capability of the SPH methodology. To overcome this disadvantage and further improve the accuracy of shock capturing, this paper introduces two other ways for numerical viscosity, which are the Lax-Friedrichs flux and the two- shock Riemann solver with MUSCL reconstruction to provide stability. Six SPH methods with different kinds of numerical viscosity are tested against the analytical solution for a 1-D dam break with a wet bed. The comparison shows that the Lax-Friedrichs flux with MUSCL reconstruction can capture the shock wave more accurate than other five methods. The Lax-Friedrichs flux and the artificial viscosity with MUSCL reconstruction are finally both applied to a 2-D dam-break test case in a L-shaped channel and the numerical results are compared with experimental data. It is concluded that this corrected SPH method can be used to solve shallow-water equations well.展开更多
文摘BACKGROUND Esophageal gastric anastomosis is a common surgical technique used to treat patients with gastric cancer who undergo total gastrectomy.However,using simple anastomosis techniques alone may not meet the needs of patients in some cases and can lead to complications such as anastomotic stenosis and ulceration.In order to overcome these issues and improve patient prognosis,muscle flap reconstruction technique has emerged.Muscle flap reconstruction is a method of improving gastric-esophageal anastomosis by transplanting muscle tissue.By covering the anastomotic site with muscle tissue,it not only enhances the stability of the anastomosis site but also increases blood supply,promoting healing and recovery of the anastomosis.Therefore,the use of muscle flap reconstruction technique in esophageal gastric anastomosis during total gastrectomy for gastric cancer is increasingly widely applied.AIM To determine the effectiveness of esophagogastric anastomosis using the muscle flap reconstruction technology in total abdominal gastrectomy for gastric cancer and perform follow-up experiments to understand the factors affecting patients’prognosis.METHODS The study subjects were 60 patients with gastric cancer who were admitted to our hospital between October 2018 and January 2022.All patients underwent esopha-gogastric anastomosis using the double muscle flap reconstruction technology in total abdominal gastrectomy.Perioperative indicators were determined,and INTRODUCTION Gastric cancer is one of the most common tumors of the digestive system worldwide.Although gastric cancer may not have significant manifestations in the early stage,as the disease progresses,systemic symptoms such as emaciation,anemia,and gastric perforation are observed[1].Surgery is the main treatment strategy for gastric cancer.With recent advances in total laparoscopy,total laparoscopic radical resection has gradually become an important treatment strategy for gastric cancer.Conventional laparoscopic surgery may require at least 5-6 incisions,whereas total laparoscopic surgery requires only 3-4 small incisions,decreasing surgical trauma and postoperative pain[2].Furthermore,because total laparoscopic surgery is less invasive than conventional laparoscopic surgery,patients can generally return to normal living and working conditions more quickly[3].Moreover,total laparoscopic surgery does not leave obvious surgical scars;therefore,it is advantageous for patients who pay attention to appearance[4].Esophagogastrostomy is a method used to repair gastrointestinal anastomosis,called the“double muscle valve”.This technique requires folding the fundus of the stomach,followed by sealing it with two layers of tissue,forming a structure similar to a valve.The application of esophagogastrostomy to total laparoscopic radical resection for gastric cancer can effectively decrease the incidence of complications such as anastomotic incontinence and bile reflux and improve the surgical cure rate and postoperative quality of life,which is a recent topic of interest for surgeons.At present,systematic multivariate analyses of the application effects of esophagogastrostomy in total laparoscopic surgery for gastric cancer and their effects on prognosis remain scarce[5].In the present study,we conducted surgery and postoperative follow-up of patients with gastric cancer and collected relevant clinical data for esophagogastric anastomosis during postoperative resection for gastric cancer to ACKNOWLEDGEMENTS I would like to express my sincere thanks to all those who participated in the manuscript.
基金Project supported by the National Natural Science Foun-dation of China(Grant No.51175001)the Natural Science Foundation of Anhui Province(Grant No.1508085QE100)the Higher Education of Anhui Provincial Scientific Research Project Funds(Grant No.TSKJ2015B03)
文摘The artificial viscosity in the traditional smoothed particle hydrodynamics （SPH） methodology concerns some empirical coefficients, which limits the capability of the SPH methodology. To overcome this disadvantage and further improve the accuracy of shock capturing, this paper introduces two other ways for numerical viscosity, which are the Lax-Friedrichs flux and the two- shock Riemann solver with MUSCL reconstruction to provide stability. Six SPH methods with different kinds of numerical viscosity are tested against the analytical solution for a 1-D dam break with a wet bed. The comparison shows that the Lax-Friedrichs flux with MUSCL reconstruction can capture the shock wave more accurate than other five methods. The Lax-Friedrichs flux and the artificial viscosity with MUSCL reconstruction are finally both applied to a 2-D dam-break test case in a L-shaped channel and the numerical results are compared with experimental data. It is concluded that this corrected SPH method can be used to solve shallow-water equations well.
