OBJECTIVE To explore the influence of surgical history on chemotherapy -induced nausea and vomiting （CINV）. METHODS A retrospective case -control study was adopted ，with 824 patients undergoing chemotherapy as the object . A total of 27 items were collected ，including demographic data ，medical history data ，pre-chemotherapy data ，and chemotherapy treatment status. Logistic regression model was used to analyze the relationship between the history of surgery and the risk of CINV . The multiple models were constructed to correct potential confounding factors ，and subgroup analysis was performed on patients with surgical history . RESULTS The incidence of CINV was higher in patients with surgical history . The statistical result before adjustment was [OR＝1.72，95%CI（1.31，2.28），P＜0.001]；after adjusting potential confounding factors ，the statistical result was [OR＝1.78，95% CI（1.28，2.48），P＝0.001]. In the subgroup analysis ，the time between surgery and chemotherapy was different ， and the impact of surgical history on CINV was different ，and the results were statistically significant （P＝0.027）. The risk of CINV showed decreasing trend with the time ，and the results were statistically significant （P for trend ≤0.050）. Compared with patients who had not undergone surgery ，patients who had undergone surgery within one year had a higher risk of CINV [OR＝ 2.33，95%CI（1.52，3.59），P＜0.001]. CONCLUSIONS Patients with surgical history are more prone to CINV ，and the risk of CINV shows a downward trend in the length of time from surgery .

A 74-year-old male patient was hospitalized for cerebral infarction, hypertension, diabetes mellitus, and coronary atherosclerotic heart disease. During the hospitalization, a thyroid ultrasound examination revealed suspicious nodules. In order to make a definite diagnosis, thyroid ultrasonography was performed, during which 2.4 ml of sulphur hexafluoride microbubbles for injection and 5 ml of 0.9% sodium chloride injection were given intravenously. Ten minutes later, the patient developed fever, confusion, profuse sweating, red skin rash, and blood pressure 80/60 mmHg, and anaphylactic shock caused by sulphur hexafluoride microbubbles for injection was considered. The patient was given intravenous injection of dexamethasone 10 mg, intravenous infusion of adrenaline 1 mg dissolved in 0.9% sodium chloride injection 250 ml, intramuscular injection of promethazine 25 mg, and mask oxygen. About 3 minutes later, the patient′s consciousness gradually turned clear, and the blood pressure rose (103/72 mmHg); 1.5 hours later, the patient′s consciousness was completely recovered, the blood pressure was 143/86 mmHg, the heart rate was 98 beats/min, and the blood oxygen saturation was 0.98. Twenty-four hours later, the rash was basically disappeared, and the patient′s condition was stable.

A 74-year-old male patient was hospitalized for cerebral infarction, hypertension, diabetes mellitus, and coronary atherosclerotic heart disease. During the hospitalization, a thyroid ultrasound examination revealed suspicious nodules. In order to make a definite diagnosis, thyroid ultrasonography was performed, during which 2.4 ml of sulphur hexafluoride microbubbles for injection and 5 ml of 0.9% sodium chloride injection were given intravenously. Ten minutes later, the patient developed fever, confusion, profuse sweating, red skin rash, and blood pressure 80/60 mmHg, and anaphylactic shock caused by sulphur hexafluoride microbubbles for injection was considered. The patient was given intravenous injection of dexamethasone 10 mg, intravenous infusion of adrenaline 1 mg dissolved in 0.9% sodium chloride injection 250 ml, intramuscular injection of promethazine 25 mg, and mask oxygen. About 3 minutes later, the patient′s consciousness gradually turned clear, and the blood pressure rose (103/72 mmHg); 1.5 hours later, the patient′s consciousness was completely recovered, the blood pressure was 143/86 mmHg, the heart rate was 98 beats/min, and the blood oxygen saturation was 0.98. Twenty-four hours later, the rash was basically disappeared, and the patient′s condition was stable.

Objective:To study the technical and essential steps in laparoscopic selective devascularization with paraesophageal veins-preservation.Methods:To retrospectively analyze the clinical data of 13 cirrhotic patients who underwent laparoscopic selective pericardial devascularization for portal hypertension at the Department of Hepatobiliary and Pancreatic Surgery, Zhejiang Provincial People's Hospital from January 2019 to March 2020. There were 9 males and 4 females with age ranging from 41 to 83 years (median 51 years). The operative time, intraoperative blood loss, postoperative complications and follow-up data were analyzed.Results:All the 13 patients completed theoperation, no patient stopped the operation or transferred to laparotomy. The operation time was (170±32) min.The intraoperative bleeding was (160±30) ml. The postoperative hospital stay was (6.1±1.1) days. There were no complications, including pancreatic leakage and intra-abdominal infection. On follow-up which ranged from 1 to 15 months, one patient developed portal vein thrombosis, no upper gastrointestinal rebleeding.Conclusions:Preservation of esophageal veins in laparoscopic selective devascularization is an accurate surgery which requires close teamwork and rich experience in laparoscopic surgery. The preservation of the main trunk of the gastric coronary vein and integrity of the esophageal veins are the keys to the surgery which is safe and feasible.

OBJECTIVE：To explore t he risk factors that may lead to the ineff ectiveness of using palonosetron combined with dexamethasone to prevent chemotherapy-induced nausea and vomiting （CINV），and to provide a reference for the rational choice and use of antiemetic drugs. METHODS ：In a retrospective case-control study ，871 patients who used palonosetron combined with dexamethasone to prevent CINV in a tertiary cancer hospital from 2016 to 2020 were selected as the object. Totally 32 related data such as demographic data ，living habits ，medical history ，examination information and treatment information were counted as variables. Combined with single factor regression ，multi-factor regression， likelihood ratio forward or backward stepwise 163.com regression were used to comprehensively screen the factors for many times. The standard target factors screened by stepwise E-mail：kongtiandong@126.com regression were included in the multivariate Logistic regression analysis，and the regression model was evaluated by the ROC c urve. RESULTS ：The multivariate Logistic regression model fitted well（AUC in ROC was 0.83，but 0.82 after screening ）. The results showed that there were 15 statistically significant independent influential factors ，including 12 independent risk factors ，ie. poor nutritional status （OR＝2.11，95％CI（1.05，4.22），P＝0.036）， history of gastrointestinal disease （OR＝2.76，95％CI（1.87，4.07），P＜0.001），abnormal electrolyte level （OR＝2.54，95％CI （1.74，3.69），P＜0.001），nausea and vomiting 24 h before chemotherapy （OR＝8.47，95％CI（3.28，21.91），P＜0.001），history of chemotherapy-induced vomiting （OR＝3.20，95％ CI （2.18，4.71），P＜0.001），high risk level of vomiting caused by chemotherapy（OR＝3.16，95％CI（2.38，4.20），P＜0.001），application of opioid combined with non-steroidal analgesics （OR＝ 4.18，95％CI（2.06，8.49），P＜0.001），the use of other drugs that stimulate the intestine and stomach （OR＝2.49，95％CI（1.28， 4.83），P＝0.007），history of surgery （OR＝1.88，95％CI（1.34，2.63），P＜0.001），high level of albumin （OR＝1.05，95％CI （1.01，1.08），P＝0.015），multiple days of single chemotherapy （OR＝1.69，95％CI（1.11，2.56），P＝0.014），and opioid analgesia medicine （OR＝1.71，95％CI（1.15，2.53），P＝0.007）；and the following 3 independent protective factors included long time of diagnosis （OR＝0.65，95％CI（0.46，0.93），P＝0.019），non-first chemotherapy （OR＝0.52，95％CI（0.33，0.83），P＝ 0.006），and drugs combined chemotherapy （OR＝0.55，95％CI（0.34，0.90），P＝0.018）. CONCLUSIONS ：Patients with the following conditions are more likely to experience CINV prevention ineffectiveness ，ie. single long-term chemotherapy ，application of chemotherapy plan with a higher risk of emesis ，history of chemotherapy-induced vomiting ，history of gastrointestinal diseases ， nausea and vomiting 24 hours prior to chemotherapy ，history of surgery ，within 1 year of diagnosis ，chemotherapy for the first time，use of opioids ，use of 5-HT3 reuptake inhibitors ，malnutrition and electrolyte disorders.

Objective:To study the causes of hemorrhage after laparoscopic pancreaticoduodenectomy (LPD) and to develop countermeasures in its prevention.Methods:The clinical data of 215 patients who underwent LPD at the Department of Hepatobiliary and Pancreatic Surgery of Zhejiang Provincial People's Hospital from December 2013 to May 2020 were reviewed. The patients’ clinical data including gender, age, comorbidities and postoperative complications such as bleeding, pancreatic fistula, biliary fistula and intraperitoneal infection were studied, with the aims to analyze the causes, clinical manifestations and treatment results of post-pancreaticoduodenectomy hemorrhage (PPH) after LPD.Results:Of 215 patients, there were 132 males and 83 females, aged (60.7±10.3) years. PPH occurred in 20 patients, incidence rate was 9.30%(20/215). Early hemorrhage was mainly caused by inadequate hemostasis or loosening of vascular clips, while delayed hemorrhage was mainly caused by gastrointestinal fistula with vascular erosion, arterial injury by intraoperative energy instruments or pseudoaneurysms. Among the 20 patients, 6 patients had early hemorrhage and 14 delayed hemorrhage. There was 1 patient with grade A, 10 with grade B and 9 with grade C hemorrhage. Thirteen patients developed pancreatic fistula, 1 biliary fistula, and 2 intraperitoneal infection. One patient responded well to conservative treatment. Hemostasis was successfully achieved by gastroscopy ( n=1) and interventional therapy ( n=7). Eleven patients required laparotomy for hemostasis. In this study, 14 of 20 patients survivied PPH and 6 patients died. The mortality rate was 30% (6 of 20 patients with PPH). Conclusions:Early hemorrhage was caused by inadequate hemostasis or loosening vascular clips, while delayed hemorrhage was related to gastrointestinal fistula with vascular erosion, arterial injury by intraoperative energy instrument or pseudoaneurysm. Careful hemostasis, adequate protection of blood vessels, and accurate anastomosis should be performed in LPD. DSA angiography should be used for arterial hemorrhage which progressed very rapidly. Interventional therapy including embolism and stenting were means to control arterial bleeding in PPH. Decisive surgical exploration when interventional therapy failed was important in reducing the mortality rate of these patients.

A 25-year-old male patient took about 60 tablets of phenobarbital and scopolamine hydrobromide by himself (each tablet contains 30 mg phenobarbital and 0.2 mg scopolamine hydrobromide). About 1 hour later, he developed coma with paroxysmal limb convulsions. Drug poisoning was diagnosed. The patient received gastric lavage, catharsis, and intravenous injection of midazolam 10 mg for epilepsy. Six hours later, his heart rate was 53 beats/min, breathing rate was 11 times/min, and occasional convulsions and hematuria occurred. Laboratory tests showed indirect bilirubin 16.97 μmol/L, total protein 54 g/L, albumin 27.6 g/L, and thrombin time 25.0 s. Multiple organ injury was considered and blood purification treatment was given. One day later, the patient′s consciousness was restored, heart rate was 68 beats/min, breathing rate was 16 times/min, and no convulsion occurred. Laboratory tests showed indirect bilirubin 8.69 μmol/L, total protein 54.7 g/L, albumin 34.0 g/L, and thrombin time 16.7 s.

A 25-year-old male patient took about 60 tablets of phenobarbital and scopolamine hydrobromide by himself (each tablet contains 30 mg phenobarbital and 0.2 mg scopolamine hydrobromide). About 1 hour later, he developed coma with paroxysmal limb convulsions. Drug poisoning was diagnosed. The patient received gastric lavage, catharsis, and intravenous injection of midazolam 10 mg for epilepsy. Six hours later, his heart rate was 53 beats/min, breathing rate was 11 times/min, and occasional convulsions and hematuria occurred. Laboratory tests showed indirect bilirubin 16.97 μmol/L, total protein 54 g/L, albumin 27.6 g/L, and thrombin time 25.0 s. Multiple organ injury was considered and blood purification treatment was given. One day later, the patient′s consciousness was restored, heart rate was 68 beats/min, breathing rate was 16 times/min, and no convulsion occurred. Laboratory tests showed indirect bilirubin 8.69 μmol/L, total protein 54.7 g/L, albumin 34.0 g/L, and thrombin time 16.7 s.

Objective To explore the safety and feasibility of laparoscopic hepatectomy combined with radiofrequency ablation for primary liver cancer difficult to manage.Methods A retrospective study was conducted to analyze the clinical data of 16 patients who underwent laparoscopic hepatectomy combined with radiofrequency ablation in the Zhejiang Provincial People's Hospital from Apr 2015 to Dec 2017.Results 2 more tumors were found by intraoperative laparoscopic ultrasound.All patients underwent laparoscopic hepatectomy combined with radiofrequency ablation successfully.There were 2 laparoscopic left hepatectomy combined with radiofrequency ablation,2 laparoscopic right hepatectomy combined with radiofrequency ablation,6 laparoscopic left lateral lobectomy combined with radiofrequency ablation,4 laparoscopic right postrior lobectomy combined with radiofrequency ablation and 2 irregular laparoscopic hepatectomy combined with radiofrequency ablation.The intraoperative blood loss ranged from 100-800 ml.The average operative time was (283 ± 112) min.The length of postoperative hospital stay ranged from 5 to 12 days.The tumor-free survival rate after operation is 100％ (16/16) on 6 to 38 months follow up.Conclusion It is safe and feasible to carry out laparoscopic hepatectomy combined with radiofrequency ablation in difficult to manage primary liver cancer.

This paper analyzed the articles from the journal of Chinese Medical Ethics published for 30 years. The results showed that the development of medical ethics in China can be divided into four stages, the incubation period, the slow growth period, the rapid growth period and the stable period;regional distribution was affected by economic development, and the development of medical ethics was also relatively backward in areas where econom-ic development was relatively backward;the number of columns was increasing year by year, the classification tend to be refined, the proportion of each column was fluctuating with the change of the social hotspot, and in recent years, the doctor -patient relationship and medical management and system construction had received more and more attention;and the paper cooperation degree need to be improved, the number of quotations and cited quota-tions steadily improved, and the quality of the paper was improved. Therefore, the government should strengthen policy guidance and standardize the development of medical ethics; the academic level should focus on regional differences and promote academic communication and disciplinary development; and on the individual level, the new medical ethics problem should be concerned, and the research on the hotspots of medical ethics should be car-ried out.