Objective To investigate the effect of Helium-oxygen mechanical ventilation on histomorphology in acute lung injury(ALI)animal models.Methods To investigate the changes of histomorphology in ALI rat models caused by sepsis by comparing air-oxygen mixture mechanical ventilation with helium-oxygen mixture mechanical ventilation.Results Helium-oxygen mechanical ventilation has no influence on the change of lung histomorphology.Conclusion Helium-oxygen mixture mechanical ventilation could not improve lung histomorphology.Helium-oxygen mixture mechanical ventilation has no protective effect on ALI animal models.

Objective To investigate the effects of Helium-oxygen mechanical ventilation on respiratory mechanics and oxygenation in ALI animal models.Methods To investigate the changes of respiratory mechanics and oxygenated indexs in acute lung injury rat models caused by sepsis at different PEEP by comparing air-oxygen mixture mechanical ventilation with helium-oxygen mixture mechanical ventilation.Results 1.Helium-oxygen mechanical ventilation could not improve respiratory mechanical indexs in ALI animal models(airway peak pressure、mean airway pressure、platform pressure、dynamic compliance、airway resistance、flow rate of peak value).On the contrary,in the condition of high level of PEEP,some indexs became worse,such as depress of dynamic compliance(P

Objective To find out the differences in gene expression of spleen tissue in septic rats by using DNA microarrays.Methods Thirty male Wistar rats were randomly (random number) and equally divided into control group and sepsis group,and septic rat model was induced by cecal ligation puncture (CLP).The rats of control group were only subjected to a simulated operation without CLP.Gene expression profiles were studied by using RatRef-12 gene chip.Rat gene expression profile was showed by using microarray to detect the changes in gene expression pattern of rat spleen tissue after CLP.And subsequently,by using relevant computer software to screen and analyze,the comparison of differences in gene expression between the sepsis group and control group was made.Results Of 22 523 genes,205 differential genes were found between sepsis group and control group,accounting for 0.910％.Among them 98 genes showed up-regulation,with 48 known functional genes,and 107 genes showed down-regulation,with 64 known functional genes.The function of such different genes were associated mainly with apoptosis,inflammation and energy metabolism of spleen cells.Conclusions Splenic dysfunction may be attibuted to the abnormal expression of relevant genes subjected to apoptosis,inflammation and alteration of energy metabolism.It may be the cause of immunosuppression in the later stage of sepsis.

Objective To explore the effect of UTI (Ulinastatin) preconditioning on gene expression profiles of spleen tissue in septic rats by DNA microarray technology. Methods Forty-five male Wistar rats were equally divided into sham group,sepsis group and UTI group by means of random number table.In UTI group the rats were treated with intramuscular injection of UTI( 105 U/kg) one hour before cecal ligation and puncture.In sepsis group and sham group intramuscular balanced solution (5 ml/kg) was given.Cecal ligation and puncture was used to reproduce septic rat model. Gene expression profile was studied by using RatRef-12 Rat gene expression profile microarray to detect the changes in gene expression pattern of rat spleen tissue after cecal ligation and puncture.Then using related computer software was used to screen and analyze the relationship between the Sepsis/UTI group and sham group. Results In 22 523 genes,205 differential genes were found between sepsis group and sham group,accounting for 0.910％.Among them 98 genes were up-regulated,with 48 known functional genes and 32 genes only showed in this group;107 genes were down-regulated,with 64 known functional genes and 34 genes only showed in it.197 differential genes were found in UTI group and sham group,accounting for 0.875％.Among them 114 genes were up-regulated,with 35 known functional genes and 19 genes only showed in this group; 83 genes were down-regulated,with 49 known functional genes and 19 genes only showed in it. Conclusions Abnormal expression of genes in the spleen tissue of rats with sepsis owing to excessive inflammation and immune suppression were partly relieved by UTI preconditioning.UTI pretects spleen at genetic level.

Objective To explore the clinical efficacy and safety of ropivacaine for combined spinal-epidural anesthesia(CSE).Methods 40 patients,who intended to undergo elective lower limb or perineum surgery,were randomly divided into two groups,each with 20 cases,ropivacaine were used in treatment group,while bupivacaine in control group the differences of feeling,motor block and recovery time,as well as their side effect in the two groups were compared.Results The maximum of spread time of anesthesia and the recovery time,and side effect in treatment group were similar to those in control group.The onset time of motor block and the peak time of motor block were longer in treatment group than that in control group,the maximum modified Bromage scale in treatment group was lower than that in control group(P

To examine the protective action and therapeutic effect of anisodamine on acute lung injure and its molecular mechanism,63 rats were randomly divided into three groups :normal control group(NS),lipopolysaccharide (LPS) group and anisodamine (ADM) group.Rat model of acute lung injure(ALI) was produced by injecting LPS(5mg/kg) into the tail vein.The lung index(LI),WBC count,the percentage of polymorphonuclear leukocyte(PMN) in the bronchoalveolar lavage fluid(BALF) were observed at 0,1,3,5 hours(T 0,T 1,T 2,T 3).The concentration of TNF-? were measured both in BALF and plasma at four time points.The expression of P65 was analyzed by immunohistochmical method five hours after injecting LPS.The results showed that LI of ADM group were significantly lower than that of LPS group at T 2 after injecting LPS(P

Objective To understand the distribution of nosocomial infection pathogens and drug - resistance in intensive care unit of our hospital for providing the guidance of clinical rational administration and preventing the hospital infection. Methods Pathogenic bacteria were isolated from the patients who suffered from nosocomial infection in intensive care unit from January of 2008 to December of 2008. They were tested by microbe VITEK and drug - sensitive reagent. Rate of drug resistance of the pathogenic bacteria was analyzed. Results Gram - negative bacilli( G- ) accounted for 47.67% of the isolated pathogenic bacteria,and most were Acinetobacter baumannii (21.65%) , Pscudomonas aeruginosa( 8.00% ) , Stenotropham onasm altophilia(6.33% ) and Klebsiella pneumoniae (4.00%). Grampositive cocci ( G~+ ) accounted for 9.56 % , and most were Staphylococcus aureus (5.56%) and Enterococcus faecium ( 1.44 % ). The rnycetes occupied the 42. 78% of the pathogens. The main pathogenic bacteria were Candida albicans (24. 44% ) and Candida albicans ( 10.89% ). The rate of drug resistance of Gram - negative bacilli( G~- ) was high as a whole,while the rate of mycetes was low. Conclusion Enhance monitoring on pathogenic bacteria distribution and drug resistance analyses of nosocomial infection in ICU could benefit for the guide of clinical rational administration and depressing multidrug - resistant bacteria.

Objective To investigate the effect of Ulinstatin(UTI) on oxygenation and gastric intramucosal pH in dogs with sepsis. Methods Sepsis was induced by intravenous infusion of lipopolysaccharide of E.coli.055:B5 to dogs,and the twenty dogs were divided into control group and ulinastatin group.Ulinastatin was administered in the ulinastatin group.The oxygen delivery(DO2),oxygen consumption(VO2), oxygen extraction(O2ER), plasma lactate levels and gastric intramucosal pH(pHi) were monitored. Results In early sepsis dogs,DO2,VO2,O2ER and plasma lactate levels increased significantly. Gastric intramucosal pH(pHi) decreased significantly. After the treatment with ulinastatin,DO2,VO2,O2ER and plasma lactate levels decreasd(P

Objective To observe the effect of diliazem on cerebral oxygen metabolism during the period of blood pressure lowering in hypertensive urgencies.Methods 30 patients of hypertensive urgencies were randomized into two groups with 15 cases each.Group Ⅰ was administered with nitroglycerin.Group Ⅱ was administered with diliazem.Nitroglycerin was injected from 2.5?g/(kg?min).Group Ⅱ were received intravenous injection of diltiazem 5~10 mg,and then were continuously infusion by 5~15?g/kg/min with mictosyringe.Blood gas analysis was carried out by taking blood samples from right internal jugular vein bulb and radial artery,and D(a-jv)O2 and CEO2 were calculated before,during and after induced blood pressure lowering 0.5,1,2,3 hours.Results Compared with those in group Ⅰ,SjvO2 increased significantly in group Ⅱ(P0.05).Conclusion Diltiazem can decrease cerebral metabolism,improve oxygenation and play a role in cerebral protection in hypertensive urgencies.

Objective To investigate the gene-expression profile in kidney of rats during late sepsis (24hours) by using microarray technology in order to offer some clue to revealing the pathogenetic mechanism of sepsis at gene level. Method A total of 30 Wistar rats were selected and divided into model group and control group randomly(random number). The rats of control group were sham operated and the rats of model group received cecal ligature and puncture (CLP) operation. The biomarkers of renal function were assayed and the histopathological changes of kidney in rats were observed under transmission electron microscope 24 hours after operation. Gene chips containing 22 107 rat-genes cDNA were used to exmine gene-expression in kidney of septic rats to sieve the genes with different expressions with software. Data were analyzed by using SPSS version 11.0 software package.Statistical analyses of two independent samples carried out by using t -test. Results Compared with the control group, the levels of blood urea nitrogen (BUN) and creatinine (Cr) of sepsis group were higher (P ＜ 0.01 ). The histopathological changes in kidney of rats demonstrated the establishment of sepsis model successful 24 hours later.Compared with the control group, there were 325 genes with differential expression in model group. Among the known-functional genes, there were 100 up-regulated and 64 down-regulated. Sorted by biological function, the genes were mainly related to metabolism, immunoresponse, cellular signal transduction, apoptosis, ion channel,growth factor and so on. Conclusions A sequence of genes expressed differentially in kidney of rats with late sepsis. Microarray technology played an important role in the research into sepsis mechanisms.