Objective To investigate the proper anesthetic administration schemes in pediatric patients undergoing surgery of transcatheter ventricular septal defect closure .Methods A total of 120 pediatric patients with congenital heart diseases of ventricu-lar septal defect ,aged 3-9 years old with ASA physiological status Ⅰ or Ⅱ ,undergoing surgery of transcatheter ventricular septal defect closure were randomly divided into 4 groups with 30 each :ketamine group( K group) ,propofol group( P group) ,ketamine associate with propofol ( KP group) ,sevoflurane group( S group) .Spontaneous respiration were maintained in K ,P ,PK groups ,but mechanical ventilation was adopted after endotracheal tube intubation in S group .The values of MAP ,HR ,SpO2 ,RR were recorded at the following time points :before anesthesia ,incision immediate ,procedure in heart ,completion of operation ,and 30min after oper-ation .awaking time and adverse reactions were recorded .Results Anesthesia and operation were carried out successfully in all pa-tients .Awaking time in P group and KP group markedly shorter than K group (P<0 .01) .The incidence rate of adverse reactions such as cough ,asphyxia and body motion in pediatric patients by mechanical ventilation and sevoflurane inhaled markedly less than other groups(P<0 .01) .Conclusion It is safe that pediatric patients received mechanical ventilation and sevoflurane inhaled after endotracheal intubation undergoing surgery of transcatheter ventricular septal defect closure .

Objective To use three different methods in attempt to estimate the biological dose of the patient partially exposed to 192Ir source at5.7 accident in Nanjing,so as to provide dosimetric information for clinical remedy of exposed patients in the emergency of a nuclear accident.Methods Peripheral blood samples were collected on days 5 after exposure.The biological dose was estimated by the yields of dicentrics plus rings ( dic + r),cytokinesis-block micronuclei (CBMN) assay and nucleoplasmic bridge plus FHC (NPB + FHC).The homogeneity of radiation exposure was examined by Poisson distribution of dicentrics.Results By using three different methods,the whole body equivalent dose was dic + r estimated to be 1.51 Gy (95％ CI 1.40-1.61),1.47 Gy (95％ CI 1.36-1.60) by CBMN and 1.30 Gy (95％ CI 1.00-1.60) by NPB + FHC,respectively.A non-poisson distribution was also detected,suggesting partial body radiation exposure.Conclusions The estimated whole body equivalent dose ot a non-uniform radiation exposure was consistent with clinical diagnosis,suggesting that the yields ofdic + r,CBMN,as well as NPB + FHC,are efficient approaches to the estimation of biological doses.

Objective To explore the natural attenuation pattern of three biological dose estimation indexes in vivo by investigating the effect on biological dosimetry of peripheral blood sampling at different time points from the victim partially exposed to 192Ir radiation source at5.7 accident in Nanjing.Methods Peripheral blood of the patient was collected on days 5,40 and 280 after exposure,respectively.The yields of dicentrics plus rings chromosomes (dic + r),cytokinesis-block micronuclei (CBMN) and nucleoplasmic bridge + fusion + horse shoe + circular(NPB + FHC) were analyzed.The dynamic reduction and dose estimation were both observed using the biomarkers mentioned above after exposure.Results Compared to the estimates on days 5 after exposure,the dose values estimated on days 40 and 280 decreased by 34％ and 49％ fordic + r method,48％ and 79％ for the CBMN assay,and 48％ and 75％ for NPN + FHC method,respectively.Conclusions Three biological dose estimation indexes show a progressive decrease in vivo,with the half-life of dic + r/cell being 40 days.The doses estimated using these three indexes on days 40 after exposure showed a relative deviation more than 20％ compared with those on days 5 after exposure.

Objective To investigate a dose response curve based on a genetic workstation with automatic analysis system of dicentric chromosome assay (DCA) for establishing a high speed dose estimation method.Methods Peripheral blood from three healthy volunteers was irradiated in vitro using 60Co γ-rays,and then lymphocytes were cultured and fixed on slides using the standard protocol for DCA.Dicentric chromosome in metaphase cells was analyzed automatically with the genetic workstation and confirmed manually,and the dose response curve of automated dicentric chromosome was fitted.Dicentric chromosome of another peripheral blood sample irradiated with different doses was manually analyzed to verify the accuracy of the above automated DCA.Results The yield of automated DCA was well fitted by an equation Y =0.018 06D2 + 0.012 79D + 0.000 489 1 with a correlation coefficient R2 =0.961.The biological dose of radiation could be accurately estimated by this dose response curve within a few minutes.Conclusions We had successfully established a new dosimetry method by analyzing dicentric chromesome automatically,which can save a lot of manual analysis time and hence has important significance for emergency rescue in nuclear accidents.

Objective:To summarize the atypical manifestations and treatment strategies of serous microcystic neoplasm of the pancreas.Methods:Review the case data of 11 cases of pancreatic serous microcystic adenoma with atypical preoperative clinical imaging findings admitted to Peking Union Medical College Hospital from July 2008 to October 2019, and summarize their clinical manifestations, CT/MRI features, and preoperative clinical diagnosis, surgical methods, postoperative conditions.Results:The median age of the 11 patients was 50 (46-66) years old, 7 females, and 4 males. There were 8 cases with back pain and 6 cases with weight loss. The preoperative imaging examination found that the lesion was located in the head and neck in 8 cases, with pancreaticobiliary duct dilatation in 7 cases, suspected vascular invasion in 3 cases, and pancreatic parenchymal atrophy in 2 cases, 3 cases showed rich blood supply and solid space, and 2 cases were connected to the pancreatic duct. Preoperative diagnosis of pancreatic malignant tumors accounted for 4 cases, neuroendocrine tumors in 3 cases, solid pseudopapillary tumors in 3 cases, and intraductal papillary mucinous tumors in 1 case. All patients underwent surgical treatment, 3 cases of distal pancreatectomy (2 cases of using Kimura method to protect the spleen), 3 cases of pancreaticoduodenectomy, 1 case of total pancreatectomy, 2 cases of pancreatic head resection with duodenum preservation, 2 cases of local resection. All patients had no early postoperative deaths. There were 2 cases of grade B pancreatic fistula, 2 cases of biochemical leakage, 1 case of postoperative abdominal hemorrhage, and 2 cases of delayed gastric emptying, all of which were cured after active treatment. The median postoperative hospital stay was 18 (7-63) days.Conclusions:Pancreatic serous microcystic neoplasm could be accompanied by atypical features such as pancreatic/bile duct dilation, parenchyma atrophy, or even present vessel invasion. Understanding the atypical clinic and image features would help improving differential diagnosis and treatment. For those with invasive features, surgical exploration should be recommended.

Objective To determine the effecting factors for diagnosis of binign or malignant in cystic lesions of pancreas(CLP).Methods One hundred twenty-six patients undergoing operations for CLP or suspected CLP in this hospital from January 1984 to June 2008 were reviewed.Patients were divided into two groups according to lesion's histological features after operation.The predictive effect of various preoperative factors on the malignant potential of CLP was evaluated.Results One hundred twenty-six patients underwent operations for suspected pancreatic cystic neoplasms.There were 89 benign and 37 malignant CLPs.The univariate analysis showed that gender, clinical symptoms(jaundice and weight loss), elevated serum CA199, and presence of one or more of three morphologic features such as solid component, nodule or septation were significantly different between benign and malignant cystic neoplasm of pancreas.The multivariate analysis indicated that imaging features and gender were independent predictors of malignancy.Conclusion In patients with suspected pancreatic cystic neoplasms, elevated serum CA199, clinical symptoms(jaundice and weight loss)and presence of suspicious morphologic features on imaging are predictors of malignant potential of CLP.Patients with a high likelihood of a potentially malignant or malignant lesion based on these three factors should undergo operation without additional investigations.

Objective To observe the effect of ketamine at low dose on inflammatory mediators during one lung ventilation and postoperative depression-like mood in patients with esophageal cancer radical surgery. Methods 60 patients who underwent esophageal cancer radical surgery were randomly divided into ketamine group(K)and control group(C). The patients in group K was injected with ketamine at a dose of 0.5 mg/kg at the time of anesthesia induction,then continuous infused with ketamine at a dose of 0.25 mg/(kg · h)for 30 minutes. Patients in group C:saline was given .Then concentrations of TNF-α,IL-6,IL-10 and PHQ-9 scores at different time points were evaluated. Results The PHQ-9 scores of the patients in K group at the 5 d after operation was significantly lower than that at the 1d before operation(P<0.05);The PHQ-9 scores in group K were decreased ob-viously than that those in group C(P<0.05). The concentration of serum TNF-α,IL-6 and IL-10 were significantly increased after T1 time of the two groups(P<0.05);Compared with group C,there was no statistical difference in the levels of TNF-α,IL-6 and IL-10 in group K at T2 and T3 time(P<0.05).Conclusion Low dose ketamine has no obvious effect on the concentration of blood TNF-α,IL-6 and IL -10 during one lung ventilation in patients with esophageal cancer radical surgery ,but it may alleviate postoperative depression-like mood.

Objective To summarize the diagnostic and therapeutic experiences for multiple insulinoma. Methods Clinical data of 34 cKsefl of multiple insulinoma treated in Peking Union Medical College Hospital between 1984 and 2007 were analyzed retrospectively. Results Multiple insulinoma was identified in these 34 cases for 37 instances.Malignant insulinoma was found in 2 cases.Three cases suffered from postoperative recurrent multipie tumors.35.3% cases belonged to MEN1;13.5% cases were of insulinoma combined with islet hyperplasia;43.2% cases had 3 or more than 3 insulinomas;Fifteen cases (40.5%)had had a misdiagnosis.45.2%tumors were smaller than 1 cm in diameter:88.9%multiple insulinonla located at the body and tail of the pancreas.Enucleation of multiple tumors was performed for 48.7 percent of cases. Conclusions Most multiple insulinomas were small,it was difficult for preoperative examination to locate all the tumors therefore.Being on the alert against multiple insulinoma and such measures as careful exploration,intraoperative blood glucose determination.fine needle aspiration biopsy,frozen sections helps to avoid missing multiple imuhnoma.

Objective To investigate the imaging anatomy and clinical significance of the inferior pancreaticoduodenal veins (IPDVs).Methods The retrospective and descriptive study was conducted.The clinicopathological data of 42 patients with pancreatic head ductal adenocarcinoma who were admitted to Peking Union Medical College Hospital from January to June 2018 were collected.There were 24 males and 18 females,aged from 41 to 78 years,with an average age of 61 years.Patients received preoperative contrast-enhanced computed tomography (CT) examination with 1 mm slice thickness,and underwent corresponding surgery according to the preoperative evaluation.Observation indicators:(1) results of preoperative CT examination;(2) surgical situations.Normality of measurement data was analyzed using Shapiro-Wilk test.Measurement data with skewed distribution were described as M (QR) or M (range),and comparison between groups was analyzed by the Mann-Whitney U test.Count data were described as absolute number or percentage,and comparison between groups was analyzed by the chi-square test.Results (1) Results of preoperative CT examination:42 patients received preoperative contrast-enhanced CT examination with 1 mm slice thickness.① The first jejunal venous trunk was identified in all the 42 patients.The first jejunal venous trunk crossed dorsal to the superior mesenteric artery (SMA) in 34 patients and ventral to the SMA in 8 patients.② Of 42 patients,2 showed no IPDV,and 40 showed IPDV including 23 with 1 IPDV,13 with 2 IPDVs,3 with 3 IPDVs,and 1 with 4 IPDVs.A total of 62 IPDVs were identified in the 42 patients,with an average IPDV number of 1 (range,0-4).There were 43 IPDVs drained into first or second jejunal venous trunks and 19 IPDVs drained into superior mesenteric vein (SMV).③ Of 42 patients,type Ⅰ IPDV was identified in 32 patients including 20 with 1 IPDV drained into jejunal venous trunk at dorsal side of SMA,7 with 2 IPDVs drained into jejunal venous trunk at dorsal side of SMA,2 with 3 IPDVs drained into jejunal venous trunk at dorsal side of SMA,and 3 with 1 IPDV drained into jejunal venous trunk at ventral side of SMA,and non-type Ⅰ IPDV was identified in 10 patients;type Ⅱ IPDV was identified in 18 patients including 17 with 1 IPDV drained into SMV and 1 with 2 IPDVs drained into SMV,and non-type Ⅱ IPDV was identified in 24 patients.Some patients can simultaneously had type Ⅰ and type Ⅱ IPDV.(2) Surgical situations:42 patients underwent pancreatoduodenectomy,14 of which underwent laparoscopic surgery and 28 underwent open surgery.There were 5 cases with SMV or portal vein reconstruction,and 18 with intraoperative blood transfusion.All the 42 patients were diagnosed as pancreatic ductal adenocarcinoma by postoperative pathological examination,including 30 of R0 resection and 12 of R1 resection.The volume of intraoperative blood loss,cases with intraoperative blood transfusion,cases with R0 and R1 resection (situation of surgical margin),cases with SMV or portal vein reconstruction were 650 mL(853 mL),15,20,12,4 in the 32 patients with type Ⅰ IPDV,aod 475 mL (480 mL),3,10,0,1 in the 10 patients with non-type Ⅰ IPDV;there were significant differences in the volume of intraoperative blood loss and situation of surgical margin (Z=94.000,x2=5.250,P＜ 0.05).There was no significant difference in the cases with intraoperative blood transfusion,cases with SMV or portal vein reconstruction between patients with type Ⅰ and non-type Ⅰ IPDV (x2 =0.045,0.886,P＞0.05).Conclusions IPDVs can be distinguished on the contrast-enhanced CT with slice thickness,and classified as IPDVs drained into SMV or jejunal venous trunk.It is necessary to carefully deal with IPDVs drained into jejunal venous trunk in the pancreaticoduodenectomy due to its more volume of intraoperative blood loss and lower R0 resection rate.

Objective To investigate the effects of Shenfu injection on early post-operative cognitive dysfunction (POCD) and brain derived neurotrophic factor (BDNF) in patients with burns. Methods Fifty-six patients with burns and ready to receive surgical treatment of scars admitted to Affiliated Hospital of Southwest Medical University from July 2015 to January 2017 were enrolled, and they were divided into a control group and a Shenfu group by random number table, 28 cases in each group. The regimen of anesthesia induction before operation and anesthesia maintenance in the operation in two groups was the same, and the patients in Shenfu group received intravenous drip of Shenfu injection 40 mL at 0.5 hour before surgery. The Mini-mental State Examination Scale (MMSE) was used to evaluate the cognitive function after surgery, and MMSE score reduction of > 2 scores was recognized as cognitive impairment after operation;patient's pain degree was evaluated by using visual analogue scale (VAS); the levels of serum BDNF were detected by the enzyme-linked immunosorbent assay (ELISA) at 0.5 hour before operation, immediately after operation, and 12 hours, 1 day, 3 days after operation. Results The MMSE scores were significantly decreased in the two groups after surgery, but decreasing degree of the MMSE scores in Shenfu group were significantly slower than those of the control group (1 day after surgery was 22.8±2.9 vs. 20.5±3.2, 3 days after surgery was 25.6±3.1 vs. 23.2±3.0, both P < 0.05). The incidence of POCD in the Shenfu group was significantly lower than that of the control group [7.1% (2/28) vs. 42.9% (12/28), P < 0.05]. The VAS scores were significantly higher in the two groups after surgery, but there was no significant difference between the two groups at each time point (all P > 0.05). The serum BDNF levels were significantly increased in two groups at immediate post-operation and 12 hours after surgery compared with those 1 day before operation, in addition, the BDNF level in Shenfu group was obviously higher than that in the control group (mg/L: 13.5±4.2 vs. 9.9±3.3, 11.4±3.5 vs. 9.1±3.2, both P < 0.05), the serum BDNF levels in two groups returned to their preoperative levels on 1 day and 3 days after surgery (all P > 0.05). Conclusion The Shenfu injection can reduce the incidence of early POCD in patients with large area burns and its mechanism may be related to the increase of BNDF expression.