BACKGROUND Endoscopic submucosal dissection(ESD)is a standardized therapeutic approach for early carcinoma of the digestive tracts.In this regard,the process of histopathological diagnosis requires standardization.How...BACKGROUND Endoscopic submucosal dissection(ESD)is a standardized therapeutic approach for early carcinoma of the digestive tracts.In this regard,the process of histopathological diagnosis requires standardization.However,the uneven development of healthcare in China,especially in eastern and western China,creates challenges for sharing a standardized diagnostic process.AIM To optimize the process of ESD specimen sampling,embedding and slide production,and to provide complete and accurate pathological reports.METHODS We established a practical process of specimen sampling,created standardized reporting templates,and trained pathologists from neighboring hospitals and those in the western region.A training effectiveness survey was conducted,and the collected data were assessed by the corresponding percentages.RESULTS A total of 111 valid feedback forms have been received,among which 58%of the participants obtained photographs during specimen collection,whereas the percentage increased to 79%after training.Only 58%and 62%of the respondents ensured the mucosal tissue strips were flat and their order remained unchanged;after training,these two proportions increased to 95%and 92%,respectively.Approximately half the participants measured the depth of the submucosal infiltration,which significantly increased to 95%after training.The percentage of pathologists who did not evaluate lymphovascular invasion effectively reduced.Only 22%of the participants had fixed clinic-pathological meetings before training,which increased to 49%after training.The number of participants who had a thorough understanding of endoscopic diagnosis also significantly increased.CONCLUSION There have been significant improvements in the process of specimen collection,section quality,and pathology reporting in trained hospitals.Therefore,our study provides valuable insights for others facing similar challenges.展开更多
The objective of this study is to evaluate the efficacy of laparoscopic surgery combined with the rectal inversion and specimen extraction(RIES)technique for rectal cancer,focusing on both short-term and long-term out...The objective of this study is to evaluate the efficacy of laparoscopic surgery combined with the rectal inversion and specimen extraction(RIES)technique for rectal cancer,focusing on both short-term and long-term outcomes.A retrospective comparative analysis was performed on 120 patients who underwent laparoscopic radical excision for rectal cancer from June 2017 to June 2021.Patients were categorized into two groups:Group RIES(n=58),which received the novel RIES technique,and Group AIES(n=62),which underwent the conventional abdominal incision for specimen extraction.Short-term outcomes,such as postoperative pelvic sepsis,temporary ileus,anastomotic leakage,and anastomotic stricture,were meticulously recorded.Longterm efficacy was evaluated through the 3-year overall survival(OS),disease-free survival(DFS),and local recurrence rate(LRR).The RIES group demonstrated a 3-year OS,DFS,and LRR of 86.2%,77.6%,and 8.6%,respectively,with a low incidence of short-term complications.Comparatively,the AIES group showed a 3-year OS,DFS,and LRR of 83.9%,74.2%,and 19.4%,respectively,with slightly higher rates of postoperative complications.Statistical analysis using the Student's t-test,the chi-square(χ^(2))test revealed no significant differences in the primary outcomes between the two groups,and suggested the noninferiority of the RIES technique.The study suggests that the RIES technique is a safe,feasible,and potentially functional and oncological superior approach to rectal cancer treatment,without compromising clinical efficacy.Further research is warranted to validate thesefindings in a larger,multicenter,and randomized controlled trial.展开更多
The paper designs a novel material-level specimen and its dedicated fixture suitable for applying Combined high-and low-Cycle Fatigue(CCF)loads.Unlike full-scale or simulation specimens,the CCF specimen eliminates geo...The paper designs a novel material-level specimen and its dedicated fixture suitable for applying Combined high-and low-Cycle Fatigue(CCF)loads.Unlike full-scale or simulation specimens,the CCF specimen eliminates geometrically induced stress gradients in the test region.Experimental data on CCF life and strain responses of ZSGH4169 alloy are acquired under different CCF loads.The Maximum Strain within Each(MSE)CCF cycle is demonstrated to be independent of the Low-Cycle Fatigue(LCF)loads and High-Cycle Fatigue(HCF)stress amplitudes,but exhibits a correlation with the Cycle Ratio of HCF/LCF(Rf).The growth law of MSE changes from linear to logarithmic as Rfdecreases.Strain amplitudes in the dwell stage,observed unaffected by Rf,are quantified as a function of LCF nominal stresses and HCF stress amplitudes.However,under a defined CCF load,strain amplitudes in the dwell stage remain constant.Strain peaks in the dwell stage in a single CCF cycle decrease in a power function with increasing HCF cycles.展开更多
Based on the split hopkinson pressure bar(SHPB)tests results,the cubic specimens have been numerically modeled in this paper to investigate the impact of key factors,such as the rise time,duration,and incident pulse s...Based on the split hopkinson pressure bar(SHPB)tests results,the cubic specimens have been numerically modeled in this paper to investigate the impact of key factors,such as the rise time,duration,and incident pulse shape,on achieving stress uniformity.After analysis,the paper provides actionable methods aimed at optimizing the conditions for stress uniformity within the cubic specimen.Finally,the lateral inertia effect of cubic specimen has been scrutinized to address the existing gap in this academic area.展开更多
基金Supported by the Medical Education Research Project from Nanjing Drum Tower Hospital,No.2021-7the Clinical Trials Fund from Nanjing Drum Tower Hospital,No.2022-YXZX-XH-04National Natural Science Foundation of China,No.82203063.
文摘BACKGROUND Endoscopic submucosal dissection(ESD)is a standardized therapeutic approach for early carcinoma of the digestive tracts.In this regard,the process of histopathological diagnosis requires standardization.However,the uneven development of healthcare in China,especially in eastern and western China,creates challenges for sharing a standardized diagnostic process.AIM To optimize the process of ESD specimen sampling,embedding and slide production,and to provide complete and accurate pathological reports.METHODS We established a practical process of specimen sampling,created standardized reporting templates,and trained pathologists from neighboring hospitals and those in the western region.A training effectiveness survey was conducted,and the collected data were assessed by the corresponding percentages.RESULTS A total of 111 valid feedback forms have been received,among which 58%of the participants obtained photographs during specimen collection,whereas the percentage increased to 79%after training.Only 58%and 62%of the respondents ensured the mucosal tissue strips were flat and their order remained unchanged;after training,these two proportions increased to 95%and 92%,respectively.Approximately half the participants measured the depth of the submucosal infiltration,which significantly increased to 95%after training.The percentage of pathologists who did not evaluate lymphovascular invasion effectively reduced.Only 22%of the participants had fixed clinic-pathological meetings before training,which increased to 49%after training.The number of participants who had a thorough understanding of endoscopic diagnosis also significantly increased.CONCLUSION There have been significant improvements in the process of specimen collection,section quality,and pathology reporting in trained hospitals.Therefore,our study provides valuable insights for others facing similar challenges.
文摘The objective of this study is to evaluate the efficacy of laparoscopic surgery combined with the rectal inversion and specimen extraction(RIES)technique for rectal cancer,focusing on both short-term and long-term outcomes.A retrospective comparative analysis was performed on 120 patients who underwent laparoscopic radical excision for rectal cancer from June 2017 to June 2021.Patients were categorized into two groups:Group RIES(n=58),which received the novel RIES technique,and Group AIES(n=62),which underwent the conventional abdominal incision for specimen extraction.Short-term outcomes,such as postoperative pelvic sepsis,temporary ileus,anastomotic leakage,and anastomotic stricture,were meticulously recorded.Longterm efficacy was evaluated through the 3-year overall survival(OS),disease-free survival(DFS),and local recurrence rate(LRR).The RIES group demonstrated a 3-year OS,DFS,and LRR of 86.2%,77.6%,and 8.6%,respectively,with a low incidence of short-term complications.Comparatively,the AIES group showed a 3-year OS,DFS,and LRR of 83.9%,74.2%,and 19.4%,respectively,with slightly higher rates of postoperative complications.Statistical analysis using the Student's t-test,the chi-square(χ^(2))test revealed no significant differences in the primary outcomes between the two groups,and suggested the noninferiority of the RIES technique.The study suggests that the RIES technique is a safe,feasible,and potentially functional and oncological superior approach to rectal cancer treatment,without compromising clinical efficacy.Further research is warranted to validate thesefindings in a larger,multicenter,and randomized controlled trial.
基金co-supported by the National Natural Science Foundation of China(51805017)National Science and Technology Project(J2017-IV-0012-0049)+1 种基金National Science and Technology Project,China(J2019-IV-0007-0075)the Fundamental Research Funds for the Central Universities,China(JKF-20240036).
文摘The paper designs a novel material-level specimen and its dedicated fixture suitable for applying Combined high-and low-Cycle Fatigue(CCF)loads.Unlike full-scale or simulation specimens,the CCF specimen eliminates geometrically induced stress gradients in the test region.Experimental data on CCF life and strain responses of ZSGH4169 alloy are acquired under different CCF loads.The Maximum Strain within Each(MSE)CCF cycle is demonstrated to be independent of the Low-Cycle Fatigue(LCF)loads and High-Cycle Fatigue(HCF)stress amplitudes,but exhibits a correlation with the Cycle Ratio of HCF/LCF(Rf).The growth law of MSE changes from linear to logarithmic as Rfdecreases.Strain amplitudes in the dwell stage,observed unaffected by Rf,are quantified as a function of LCF nominal stresses and HCF stress amplitudes.However,under a defined CCF load,strain amplitudes in the dwell stage remain constant.Strain peaks in the dwell stage in a single CCF cycle decrease in a power function with increasing HCF cycles.
基金Funded by the National Natural Science Foundation of China(Nos.52278518 and 51938011)the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.24KJB560021)。
文摘Based on the split hopkinson pressure bar(SHPB)tests results,the cubic specimens have been numerically modeled in this paper to investigate the impact of key factors,such as the rise time,duration,and incident pulse shape,on achieving stress uniformity.After analysis,the paper provides actionable methods aimed at optimizing the conditions for stress uniformity within the cubic specimen.Finally,the lateral inertia effect of cubic specimen has been scrutinized to address the existing gap in this academic area.
