OBJECTIVE To analyze the incidence and related factors of the nosocomial infection in our hospital during a 3-year period.METHODS By using the retrospective method,all inpatient cases in our hospital from 2004 through 2006 were surveyed and analyzed.RESULTS Totally 44 759 inpatient cases were involved in the period,and 1653 cases with nosocomial infection occurred.The infection rate was 3.69%.The major sites of the infection were lower respiratory tract(45.12%),upper respiratory tract(19.12%)and urinary tract(13.77%).The most common pathogens were Klebsiella pneumonial(13.01%),Escherichia coli(11.53%),Pseudomonas aeruginosa(10.39%),and Acinetobacter baumannii(9.13%) in Gram-negative bacteria,and Staphylococcus aureus(5.02%) and S.epidermidis(3.42%) in Gram-positives.Candida albicans(21.8%) was the major isolate in Fungi.The infection rate in ICU was 20% higher than in other departments per year during 3 years.CONCLUSIONS Strengthening the medical knowledge of about nosocomial infection among employees,improving the environment quality of hospital,identifying pathogens correctly and surveying the resistance of antibiotic agents should be noted to control nosocomial infection.

OBJECTIVE To investigate the risk factors of hospital infection among parturients to put forward prevention measures.METHODS The infection cases among parturients in our hospital 2005-2007 were analyzed by retrospective survey.RESULTS The first three infections sites were upper respiratory tract(29.79%);surgical incision(28.72%) and urinary tract(21.28%).The main factor for upper respiratory tract infetion was the traditional postnatal recovering modality.Surgical incision infections were mainly perineum ones.Catheterization after the caesarean operation led to urinary tract infection.CONCLUSIONS Postnatal recovery by scientific modality,aseptic operation and strict infection management are the keys to preventing obstetrical infections.

Objective: To observe the relationship between homocysteine(Hcy)and spatial cognitive ability and to evaluate whether vitamin B12 supplementation could protect spatial cognitive ability in rats. Methods: The rats were randomized into three groups. The experimental group was given methionine subcutaneously. The intervention group was given methionine and vitamin B12 subcutaneously. The control group received isometric normal saline. After being raised for 8 weeks, all rats were examined for plasma Hcy and serum vitamin B12 and scores of Y-maze test. The brain tissues of hippocampus were checked immunohistochemically for acetylcholinesterase (AChE). Results: The experimental group developed hyperhomocysteinemia and descreased spatial cognitive ability significantly (P0.05). Conclusion: Homocysteine can impair the spatial cognitive ability in rats and vitamin B12 is effective in lowering Hcy level and protect the spatial cognitive ability of rats.

Objective To present study was to investigate the effects of insulin-like growth factor binding protein 7 (IGFBP7)on the proliferation of human hepatocellular carcinoma HepG2 cells.Methods Human hepatocellular carcinoma HepG2 cells was cultured,and plasmid pIRES2-ZsGreen1-IGFBP7 or empty plasmid was transfected into HepG2 cells and the cell transfection efficiency was examined by fluores-cence microscopy;MTT was performed to evaluate the effect of IGFBP7 on proliferation and apoptosis of HepG2 cells in 48 hours after transfection.Results IGFBP7 transfected group decreased cell proliferation noticeably.Conclusions Overexpression of IGFBP7 can down-regulte the proliferation of human hepatocel-lular carcinoma HepG2 cells.

Objective: To evaluate the intestinal trophic effects and adverse reactions of nasojejunal and jejunostomy tube im-plants on patients with total gastrectomy. Methods:A total of 86 patients with advanced gastric cancer were randomly and equally di-vided into two groups. Groups A and B received enteral nutrition therapies through nasojejunal and jejunostomy feeding tube implants, respectively. The therapeutic efficacy of the two methods of enteral nutrition therapy and the corresponding adverse reactions observed in the two groups were compared. Results:Group B patients demonstrated shorter anal evacuation and defecation times than group A patients, the difference is statistically significant (P<0.05). Moreover, the bodyweight, total protein, and albumin levels of the patients significantly decreased in both groups after enteral nutrition therapy was administered (P<0.05). Postoperative nutritive indexes were higher in group B than in group A;however, no significant difference was obtained between the two groups (P>0.05). Nonetheless, the patients in group B tolerated the treatment well compared with those in group A (P<0.05). The complication rates of groups A and B were 18.6%and 23.3%, respectively, but this difference was not significant (P>0.05). Conclusion:Patients subjected to total gastrecto-my showed higher tolerance to jejunal tube implants for enteral nutrition than to nasojejunal tube implants, indicating that jejunal tube implants can be used to improve the nutritional status of patients.

Objective To evaluate the clinical value of Fluorine-18-fluorodeoxyglucose (18F-FDG) positron-emission temography-computed tomography (PET-CT) examination in intrahepatic cholangiocarcinoma (ICC) staging.Methods The retrospective cross-sectional study was conducted.The clinicopathological data of 190 patients with ICC who were admitted to the Eastern Hepatobiliary Surgery Hospital Affiliated to Naval Military Medical University from September 2013 to June 2016 were collected.There were 107 males and 83 females,aged from 37 to 79 years,with an average age of 57 years.There were 90 cases without distant metastasis undergoing surgery treatment and 100 with distant metastasis undergoing non-surgical treatment.Patients underwent preoperative CT,magnetic resonance imaging (MRI),and PET-CT examination,and then received surgery or non-surgery according to preference of patients and their family members.Observation indicators:(1) imaging features on preoperative CT,MRI,PET-CT examination;(2) treatment;(3) evaluation of tumor diameter,multiple tumors,macrovascular invasion,and bile duct invasion by three examinations in ICC staging of patients undergoing operation;(4) evaluation of regional lymph node metastasis by three tests in ICC staging of patients undergoing operation;(5) evaluation of distant metastasis in ICC staging by three tests.Measurement data with normal distribution were represented as Mean±SD,and comparison between groups was analyzed by single factor ANOVA and paired comparison was analyzed by SNK method.Measurement data with skewed distribution were described as M (range).Count data were described as absolute number or percentage,and comparison between groups was analyzed using the chi square test.Results (1) Imaging features on preoperative CT,MRI,PET-CT examination:all the 190 patients received routine upper abdominal CT,MRI,and systemic PET-CT examination before treatment.CT imaging of ICC showed inhomogeneous low density on plain scan,peripheral enhancement in arterial phase,persistent enhancement of tumor margin in portal phase,and sometimes mild to moderate centripetal enhancement.MRI imaging showed heterogeneous low signal on T1-weighted imaging,uneven high,and slightly high signal on T2-weighted imaging.Reinforcement on MRI is the same as CT.Transverse images,fusion transverse images and maximum intensity projection images of PET-CT imaging showed abnormal high FDG uptake around the tumor.(2) Treatment:81 out of the 90 ICC patients with surgery treatment underwent hepatectomy and lymphadenectomy,and 9 underwent only tumor tissue biopsy and lymph node biopsy due to intraoperative finding of abdominal metastasis.Of the 100 non-operated patients,30 received systemic chemotherapy,23 received local radiotherapy,and 47 gave up treatment.(3) Evaluation of tumor diameter,multiple tumors,macrovascular invasion,and bile duct invasion by three examinations in ICC staging of patients undergoing operation:the tumor diameters of ICC on CT,MRI and PET-CT were (6.8±2.8)cm,(6.9±2.9)cm,(7.2±2.8)cm,respectively.There was no significant difference among the three methods (F=0.085,P＞0.05).CT,MRI,PET-CT had similar accuracy of 80.0％ (72/90),78.9％ (71/90),72.2％ (65/90) on diagnosing multiple tumors,87.8％(79/90),92.2％ (83/90),94.4％ (85/90) for macrovascular invasion,and 93.3％ (84/90),95.6％ (86/90),96.7％ (87/90) for vascular and bile duct invasion,respectively,there was no significant difference in the above indicators between the three groups (x2 =1.801,2.662,1.131,P＞0.05).(4) Evaluation of regional lymph node metastasis by three examinations in ICC staging of patients undergoing operation:the accuracy of CT,MRI and PET-CT examination for lymph node metastasis was 62.2％ (56/90),68.9％(62/90),86.7％ (78/90) and sensitivity was 40.0％ (16/40),47.5％ (19/40),80.0％ (32/40),respectively,showing significant differences between the three groups (x2 =14.446,14.666,P＜0.05),showing a significant difference between CT and PET-CT examination (x2=14.134,13.333,P＜0.05),showing a significant difference between MRI and PET-CT examination (x2=8.229,9.141,P＜0.05).The sensitivity of CT,MRI and PET-CT examination for lymph node metastasis was 80.0％ (40/50),86.0％ (43/50),92.0％ (46/50),showing no significant difference between the three groups (x2=2.990,P＞0.05).(5) Evaluation of distant metastasis in ICC staging by three tests:there were 27,34 and 100 cases with distant metastasis evaluated by CT,MRI and PET-CT examination,including 40 with supraclavicular lymph node metastasis,32 with bone metastasis,30 with mediastinal lymph node metastasis,20 with hilar lymph node metastasis,17 with pulmonary metastasis;77 patients had more than 2 sites of metastasis.The accuracy of CT,MRI and PET-CT examination for distal metastasis in 190 ICC patients was 61.58％ (117/190),65.26％ (124/190),98.42％ (187/190),respectively,with a significant difference between the three groups (x2=83.639,P＜0.05),with a significant difference between CT and PET-CT examination (x2=80.592,P＜0.05),between MRI and PET-CT examination (x2=70.284,P＜ 0.05).Conclusion PET-CT examination makes up for the deficiency of CT and MRI in judging regional lymph node metastasis and distant metastasis,and contributes to the clinical staging of ICC.