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Objective: To investigate the prevalence and risk factors of functional dyspepsia (FD) and irritable bowel syndrome (IBS) among college students in China., Methods: An online questionnaire survey of college students aged 17-35 from across China was conducted. The online questionnaire survey was supplemented by an offline survey. A total of 2025 valid samples were included for statistical analysis. χ 2 test and logistic regression were performed for statistical analysis., Results: The prevalence of FD among college students who met the Rome Ⅳ diagnostic criteria was 5.5% (112/2025), with most of them, or 66.1% (74/112), suffering from postprandial discomfort syndrome (PDS). Smoking (odds ratio [ OR ]=2.334, 95% confidence interval [ CI ]: 1.187-4.589, P =0.014), depression ( OR =2.447, 95% CI : 1.421-4.214, P =0.001), and insomnia ( OR =1.947, 95% CI : 1.291-2.937, P =0.001) were positively correlated with the prevalence of FD. The prevalence of IBS was 1.9% (38/2025), with IBS-diarrhea dominant (IBS-D) being the most important subtype that accounted for 44.7%. Anxiety ( OR =3.63, 95% CI : 1.34-9.88, P =0.012) and insomnia ( OR =2.35, 95% CI : 1.18-4.68, P =0.015) were positively correlated with the prevalence of IBS., Conclusion: Based on Rome Ⅳ criteria, IBS and FD are not uncommon among Chinese university students. Psychological disorders and some related lifestyle factors may be related to the development of the disease. In the future, more series of studies based on different diagnostic criteria, different regions, and multiple factors should be conducted in China., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Sciences).)

Objective: To optimize operative procedure on intraoperative exploration, resection and reconstruction in total laparoscopic pancreaticoduodenectomy (LPD)., Methods: The clinical data of patients who underwent total LPD in West China Hospital (and Shangjin Hospital) of Sichuan University from Dec. 2015 to Dec. 2017 were retrospectively analyzed. The diagnosis of the patients included ampullar cancer, distal common bile duct cancer, benign and maligant tumors of pancreatic head and chronic pancreatitis of pancreatic head. The patients were divided into experimental group and control group according to weather the optimization of operative procedure was used. The position and Trocar arrangement in both groups were same. Two Chief Surgeons Model was used in experimental group, the procedure was divided into three key steps: laparoscopic exploration, resection and reconstruction, each followed anticlockwise operative process, from left to right, from shallow to deep (see the Videos 1 to 3 in Supplemental Contents, http://ykxb.scu.edu.cn/article/doi/10.12182/202007606108). As to control group, the chief operation was finished by chief surgeon and no specific operative procedure was applied. All the patients were followed up to postoperative 90 d., Results: A total of 146 patients were collected, including 76 patients undergoing LPD with optimization of operative procedure and 70 patients in the control group. There was no significant difference in preoperative data between the two groups regarding to ASA scoring, age, gender, body mass index and laboratory tests ( P >0.05). Compared with the control group, the operative time in the experimental group was significantly shorter (341 min vs. 397 min, P <0.05), estimated blood loss was significantly reduced (110 mL vs. 180 mL, P <0.05). The conversive rate, transfusion rate, length of postoperative hospital stay, number of harvested lymph nodes, post pancreatectomy hemorrhage, bile leakage, pancreatic fistula (Grade B+C), reoperation, the occurrence of severe postoperative morbidity (Clavien-Dindo Ⅲ-Ⅳ), and postoperative 90 d mortality were no statistically difference., Conclusion: With Two Chief Surgeons Model combined with anticlockwise operative process could optimize operative procedure in total LPD. It is safe and feasible, and could shorten the operation time and reduce intraoperative blood loss., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Science Edition).)

Objective: To explore the individualized surgical strategies and surgical methods which can greatly improve the efficacy and safety of laparoscopic pancreaticoduodenectomy in difficult and complicated situations, such as pancreatic head malignant tumors invade the major vascular and chronic pancreatitis with severe abdominal adhesions., Methods: Case 1：A 65-year-old man with jaundice was diagnosed preoperatively with a pancreatic acinus process with superior mesenteric vein (SMV) invasion. In order to ensure R0 resection, the patient underwent laparoscopic pancreaticoduodenectomy combined with SMV resection and reconstruction, taking the way of the superior mesenteric artery (SMA)-first approach. The length of SMV removed was 2 cm (see the Video 1 in Supplemental Contents, http://ykxb.scu.edu.cn/article/doi/10.12182/20200760501). The portal vein (PV)-SMV occlusion time was 26 min, the reconstruction time was 17 min. The duration of the surgery was 340 min, with 200 mL of blood loss and no transfusion. Case 2: A 47-year-old man with abdominal pain was admitted with preoperative diagnosis of pancreatic head mass with obstructive jaundice. His past medical history included small bowel resection and bowel anastomosis for abdominal trauma, open Roux-en-Y choledochojejunostomy for acute pancreatitis and obstructive jaundice. In the operation, we used ultracision harmonic scalpel, hook electrode, laparoscopic scissors, and other means to separate the adhesion of different parts of the abdominal, adjusted traditional modular surgical procedure for laparoscopic pancreaticoduodenectomy with Easy First strategy to perform surgical resection (see the Video 2 in Supplemental Contents, http://ykxb.scu.edu.cn/article/doi/10.12182/20200760501). Emergencies such as mass bleeding，used Two Chief Surgeons Model to control bleeding and suture the bleeding site. The duration of the surgery was 400 min, with 500 mL of blood loss and no transfusion., Results: Case 1: The patient's postoperative course was uneventful, with a hospital stay of 9 d. Histology confirmed the diagnosis of a 3.6 cm×2.4 cm×1.8 cm pancreatic ductal adenocarcinoma tumor (R0 and lymph nodes 1/26, AJCC 8th T 2 N 1 M 0 , stage ⅡA). The removed SMV layer was invased and the cut edges were negative. The patient underwent 6 cycles of GS (gemcitabine+tegio) chemotherapy. The patient was asymptomatic 1 year later, with no tumor recurrence and no pancreatic insufficiency. Case 2: The patient's postoperative course was uneventful, with a hospital stay of 11 d. Histology confirmed the diagnosis of a 6 cm pancreatic inflammatory mass. The patient was asymptomatic 20 months later, with no recurrence of acute pancreatitis again., Conclusion: With different surgical methods and individualized surgical strategies, laparoscopic pancreaticoduodenectomy in difficult and complicated situations is safe and feasible in the experienced pancreas minimally invasive center., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Science Edition).)

Objective: To present our institutional experience in laparoscopic spleen-preserving distal pancreatectomy (Lap-SPDP) using Kimura technique with or without early occlusion of the root of the splenic artery. In addition, to explore the safety and feasibility of this occlusion technique, especially its advantages in intraoperative hemorrhage control and spleen preservation., Methods: From February 2011 to May 2019, 54 consecutive patients who were diagnosed as benign or low-grade malignant space-occupying lesions at the body and the tail of pancreas underwent Lap-SPDP using Kimura technique in our institution. Twenty-five patients before 2015 were allocated into non-occlusion group and 29 patients after 2015 were allocated into occlusion group. The non-occlusion group underwent direct dissection of the distal pancreas with blood supply from the splenic artery as well as traditional traction of the splenic artery without occlusion. Whereas the occlusion group underwent temporary occlusion of the root of the splenic artery by Bulldog clip after transecting the neck of the pancreas and distal pancreas was excised under a relatively bloodless situation. Surgical techniques were described in detail. Data between groups were retrospectively collected and stratification analysis was performed based on the diameter of tumor (>3 cm or ≤3 cm)., Results: Before stratification, there was a statistical difference in age between the two groups ( P =0.033), but no difference in body mass index (BMI) ( P =0.069). The median lesion diameter of the two groups was 2.5 cm and 4 cm, respectively, with no statistical difference ( P =0.065). The success rates of spleen preservation in the two groups were 93.1% and 92% respectively, showing no significant difference ( P =1.000). The length of hospital stay was slightly longer in the non-occlusion group than that in the occlusion group ( P =0.020). Comparing with the non-occlusion group, the occlusion group had significantly shorter operation time (median, 165 min vs. 235 min) and less estimated blood loss (median, 100 mL vs. 200 mL) ( P <0.05). After stratification by the tumor diameter, there were 2 cases of failed spleen preservation both in occlusion and non-occlusion group with tumor diameter >3 cm (occlusion group: 2/8, 25% and non-occlusion group: 2/14,14.3%). However there was no statistical difference between the two groups ( P =0.602). When the tumor diameter ≤3 cm, the spleen preservation rate of both groups reached 100%. When the tumor diameter was >3 cm, the operation time of the occlusion group was shorter than that of the non-occlusion group ( P =0.005). In terms of intraoperative blood loss, regardless of tumor size, the occlusion group had less estimated blood loss than that of the non-occlusion group ( P <0.05). In the occlusion group, no conversion or blood transfusion was needed intraoperatively and/or postoperatively. After stratification, there was no difference in the length of hospital stay between two groups ( P >0.05). During the follow-up period (median (Min-Max), 13.5 (3-96) months), no perioperative death, disease recurrence, portal vein or splenic vein thrombosis, gastric varices or upper gastrointestinal bleeding was noted., Conclusion: Lap-SPDP using Kimura technique with early occlusion of the root of splenic artery was safe and feasible and could be generally applied. By using this technique, we could reduce the operation time and blood loss, as well as sustain a high probability of spleen preservation., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Science Edition).)

Objective: To evaluate the clinical predictive ability of POSSUM and P-POSSUM scoring system in laparoscopic pancreatoduodenectomy (LPD)., Methods: There were 132 consecutive LPD performed in West China Hospital of Sichuan University from February 2014 to July 2017. The clinical data were retrospective collected, including 12 preoperative physiological variables, 6 operative severity variables, and complications and mortality The postoperative expected mortality and morbidity were calculated by POSSUM and P-POSSUM score, and compared with measured morbidity and mortality. The clinical predictive ability of POSSUM and P-POSSUM system was evaluated by the receiver operating characteristic (ROC) curve and hierarchical analysis., Results: The area under ROC curve ( AUC ) was 0.83. The preoperative physiological score (PS) and POSSUM score of the patients with complications were higher, and the difference was statistically significant ( P <0.01). For the prediction of complications after LPD, the expected value was the most accurate to the measured value when POSSUM score was >0.4-0.6. POSSUM scoring system had no significant difference in predicting the incidence of complications for benign and malignant lesions ( P >0.05), with a higher predictive value for malignant tumors. It was valuable in predicting the incidence of complications in male and female, and there was no significant difference in expected value between the sexes. Expected morbidity rate by POSSUM scoring system was 36.6% and measured morbidity rate was 33.3%. The expected and measured morbidities had no significantly differences. The expected mortality was 7.0% and measured mortality rate was 1.5%. The expected and measured mortality had no significantly differences. Expected mortality by P-POSSUM system was 1.6%, the expected and measured mortality had no significantly differences., Conclusion: POSSUM and P-POSSUM scoring system had high value for predicting LPD postoperative morbidity and mortality of LPD patients., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Science Edition).)