The paper introduces the ventilator tester based on ADuC812 which can test the main signals including the flow and pressuere of ventilators.With the analysis of the tester and its applications to several ventilators available,it proves reliable and suitable for clinical use.

OBJECTIVE To investigate the effect of Protobothrops mucrosquamatus venom (PMV) and its fractions on functions of the circulatory system in vitro in order to better understand its toxicity mechanism. METHODS PMV was isolated to three fractions FⅠ, FⅡ and FⅢ with a different molecular mass range by Sephadex G-75 gel filtration chromatography. Platelet rich plasma was adjusted to 3×1011 L-1 by platelet poor plasma. Platelet suspension was incubated with PMV and its fractions 0.03 g.L-1 for 5 min, respectively, and platelet aggregation was determined on an LBY-NJ4 aggregometer. PMV and its fractions 0.05 g.L-1 were preincubated with plasminogen 0.1 U.L-1 for 10 min before chromogenic substrate cleavage activity was measured by endpoint and enzyme kinetics determination. PMV and its fractions 1.0 g.L-1 were incubated with rat plasma for 5 or 30 min, and thrombin time (TT), activated partial thromboplastin time (APTT), prothrombin time (PT) and fibrinogen (FlB) content were assayed. The microvascular endothelial cells were exposed to PMV and its fractions 10, 50 and 250 mg.L-1 , respectively, for 24 h, while the morphological change was observed using an inverted phase contrast microscope, and the cell viability was determined by MTT method. PMV and its fractions were incubated with guinea pig red blood cell suspension in the presence or absence of lecithin for different time, and hemolysis was measured. RESULTS Compared with normal control, platelet aggregation rate was significantly increased by PMV and FⅠ (>71 ku)〔(12.4±4.1)%,(61.0±5.8)% and (56.9±5.9)%〕(P<0.01). PMV and FⅡ (18-37 ku) significantly hydrolyzed chromogenic substrate S-2251(P<0.01). PMV and FⅠ caused plasma coagulation. Compared with normal control, FⅡ and FⅢ (<10 ku) remarkably prolonged TT, APTT and PT( P<0.01). Morphological observation revealed that PMV, FⅠ and FⅡdetached the adherent cells. Compared with normal control group, PMV, F Ⅰ and F Ⅱ inhibited cell viability, and the survival rate of the cells decreased to (56.8±3.6)%,(71.6±3.8)% and(58.2±5.5)%, respectively. PMV and FⅡ slowly caused slight hemolysis in absence of lecithin. PMV and FⅡ caused significant hemolysis in the presence of lecithin, and the hemolytic rate increased to (81.0±4.0)% and (81.0±1.0)%( P <0.01) in 0.5 min, respectively, compared with (17.7±1.0)% of the control group. CONCLUSION PMV possesses different activities that affect the functions of the circulatory system in vitro, and the fractions play different roles in toxicity mechanisms.

Objective To observe the expression of heat shock protein 47 (HSP47) and transforming growth factor-β2 (TGF-β2) in vitreous specimens and epiretinal membranes of patients with proliferative vitreoretinopathy diseases.Methods Vitreous specimens and epiretinal membranes were obtained from 48 patients (48 eyes) with proliferative vitreoretinopathy (PVR) and 50 patients (50 eyes) with proliferative diabetic retinopathy (PDR).Vitreous specimens and internal limiting membranes were collected from 20 patients (20 eyes) with idiopathic macular hole (IMH) as control group.The expression of HSP47 and TGF-β2 in the vitreous specimens was evaluated using enzyme linked immunosorbent assay.The expression of HSP47,TGF-β2,types Ⅰ and Ⅲ collagen in epiretinal membrane and internal limiting membrane specimens were observed for immunohistochemical staining method.The correlation between the positive expression of HSP47 and TGF-β2,types Ⅰ and Ⅲ collagen in epiretinal membrane specimens of patients with PVR and PDR were analyzed.Results The expression of HSP47 in vitreous specimens of patients with PVR,PDR and IMH were (212.35±23.32),(231.30±26.79),(171.06±28.91) pg/ml,respectively.The expression of TGF β2 in vitreous specimens of patients with PVR,PDR and IMH were (1919.96 ± 318.55),(1939.39 ± 177.57),(1194.61 ± 234.20) pg/ml,respectively.The expression of HSP47,TGF-β2 in the vitreous specimens of patients with PVR and PDR were significantly increased compared with patients with IMH and the difference was statistically significant (F=12.952,34.532;P＜0.01).The epiretinal membrane of patients with PVR and PDR showed markedly increased expression of HSP47,TGF β2,types Ⅰ and Ⅲ collagen in the cytoplasm and extracellular matrix.The expression of HSP47 and type Ⅲ collagen was negative and the expression of TGF-β2 was weakly positive and the expression of types Ⅰ collagen was positive in internal limiting membrane of patients with IMH.The expression of HSP47,TGF β2,types Ⅰ and Ⅲ collagen in the epiretinal membrane of patients with PVR and PDR were significantly increased compared with patients with IMH and the difference was statistically significant (F=13.469,18.752,12.875,20.358;P＜0.01).The expression of HSP47 was positively correlated with thepositive expression of TGF-~,types Ⅰ and Ⅲ collagen in epiretinal membrane specimens of patients withPVR (r=0.475,0.556,0.468;P＜0.05) and PDR (r=0.484,0.589,0.512;P＜0.05).Conclusions This study showed increased consistent expression of HSP47 and TGF-β2 in vitreous and epiretinal membrane specimens of patients with PVR and PDR.Both HSP47 and TGF-β2 were expressed in the cytoplasm and extracellular matrix.HSP47 and TGF-β2 may be involved in the pathological process of PDR and PVR by promoting collagen synthesis.

Objective To analyze the principal components and trends of total health expenditure from 1995 to 2011 in Xinjiang,in order to put forward policy recommendations to improve health financing.Methods Calculating the total health expenditure in Xinjiang using the financing source method,and analyzing the calculation results.Results Total health expenditure increase in Xinjiang averaged 14.75％ from 1995 to 2011.The total health expenditure in Xinjiang and per capita health expenses maintained a growing trend,and the level of financing was higher than regional economic development,but the health consumption elasticity coefficient was unstable; Residents' individual health burden was gradually decreasing,the health expenses of financing structure were relatively reasonable; Urban and rural residents health care spending grew faster than the per capita income,and the proportion in people's living consumption was found rising.Conclusion It is recommended to continue with the health reform,make full use the policy of strategic health support to Xinjiang,promote primary health service equity,develop economy and improve the urban and rural income,strengthen social health care security systems,tighten macro-control and curb the fast rising trend of health expenses.

AIM:To investigate the influence and mechanisms of human pancreatic cancer tumor microenvironments on T-cell immunoglobulin mucin-3 (TIM-3) expression and function of dendritic cells (DCs).METHODS:Tumor-infiltrating dendritic cells (TIDC) and para-carcinoma tissue DCs were isolated by Ficoll-Hypaque density centrifugation from trypsinized pancreatic carcinoma tissues, and the peripheral blood mononuclear cells were isolated from pancre-atic cancer patients or healthy people.The expression of TIM-3 on DCs was detected by flow cytometry.DCs isolated from healthy people peripheral blood mononuclear cells were induced by rhGM-CSF and IL-4.The expression of TIM-3 in the DCs treated with the culture supernatants of Capan-2, SW1990 and Panc-1 pancreatic cancer cells or human skin fibroblast (Hs27) cells for 48 h, and in the DCs treated with supernatants of Capan-2 cells, anti-VEGF-R2, anti-IL-10 and EP2 re-ceptor blocking peptide were evaluated by flow cytometry.The releases of IFN-βand IL-12 in the culture supernatants of DCs pretreated with monoclonal antibody ( mAb) to TIM-3 or DNase+RNase, followed by stimulation with apoptotic Ca-pan-2 cells, were detected by ELISA.RESULTS:DCs in tumor microenvironments had higher expression of TIM-3 than the DCs from para-carcinoma tissues and pancreatic cancer patient or healthy people peripheral blood ( P<0.01 ) .TIM-3 expression in the DCs treated with the culture supernatants of Capan-2, SW1990 and Panc-1 pancreatic cancer cells for 48 h was much higher than that in Hs27 cells (P<0.05).Treatment with a combination of anti-VEGF-R2, anti-IL-10 and EP2 receptor blocking peptide largely diminished the upregulation of TIM-3 on the DCs mediated by Capan-2 cell superna-tants (P<0.05).The concentrations of IFN-βand IL-12 in the DCs with high expression level of TIM-3 were lower than those in the DCs with low TIM-3 expression level.Treatment with mAb to TIM-3 resulted in much more IFN-βand IL-12 releases (P<0.01), but DNase+RNase made this effect disappear.CONCLUSION:TIM-3 serves as a negative regula-tor of DCs innate immune responses in the pancreatic cancer microenvironments.The secretion of soluble factors to tumor microenvironment by pancreatic cancer cells, including IL-10, VEGF and PGE2 , may contribute to the regulation of TIM-3 expression.

[ABSTRACT]OBJECTIVETo evaluate the accuracy of the watch peripheral arterial tone (Watch-PAT) in the diagnosis of obstructive sleep apnea hypopnea syndrome (OSAHS).METHODSA total of 51 outpatients who had chief complaint of sleep snoring were carried out Watch-PAT test and polysomnography (PSG) simultaneously, and the results were statistically compared.RESULTSFifty one patients, consisted of 44 males and 7 females, had the mean age of (45.7±12.0) years (±s) and the mean body mass index of (28.8±3.6) kg/m2.The mean PSG apnea hypopnea index (AHI) was (45.69±12.02) events per hour, and mean Watch-PAT AHI was (35.49±24.49) events per hour. Significant correlation has been detected between Watch-PAT AHI and PSG AHI (r=0.878,P<0.001). The sensitivity and specificity of Watch-PAT were 97.73% and 85.71%, when PSG-AHI≥5/h events per hour was setting as the threshold value to diagnose OSAHS. The diagnostic efficiency of Watch-PAT has been tested by ROC curve, and the area under the curve approached to 0.997.CONCLUSIONThe Watch-PAT was proved as a portable and reliable device of screening patients who were suspected OSAHS.

Objective To investigate the clinical distribution of carbapenem-resistant Enterobacteriaceae(CRE)strains separated in this hospital and the situation of its production of carbapenem enzyme.Methods The production of carbapenem enzyme by CRE strains was confirmed by using modified Hodge test,the situation of the production of metallo-beta-lactamases by CRE strains was screened by using imipenem-EDTA double-disk synergy test,and the clinical distribution of CRE strains was retrospectively ana-lysed.Results 37 strains of CRE isolated in this laboratory were screened by using instrument method and verified by using disk diffusion (K-B)method.It showed an increasing trend from 2012 to 2014 in the amount of CRE strains.In terms of bacterial spe-cies,K.pneumonia(1 6 strains)was the main kind of carbopenems-resistant strains,followed by E.coli(6 strains),Ser.marcescens(6 strains)and E.cloacae(4 strains).CRE strains were mainly isolated from geriatric ward and intensive care unit(ICU).Sputum,u-rine and blood specimen were key sources of CRE strains.Modified Hodge test confirmed that 36 strains of CRE were the strains that can produce carbapenemase,including 4 strains of K.pneumonia,3 strains of E.cloacae,and 1 strain of E.asburiae,and strains producing metallo-beta-lactamases were confirmed by using imipenem-EDTA double-disk synergy test.Conclusion Elderly patients with underlying diseases are susceptible population of CRE hospital infection and are primary preventive targets.The principal mechanism of carbapenem-resistant CRE strains in this hospital is the production of carbapenemase and production of metallo-β-lac-tamases in a small number of strains.

Objective To investigate the efficacy of adhesive negative pressure suction apparatus in treatment of wound infection after colorectal surgery.Methods From January 2010 to November 2011,consecutive patients with wound infection after colorectal surgery were randomized to the experimental group (n =24 ) and the control group (n =24).The patients in experimental group were treated with the adhesive negative pressure suction apparatus.The patients in the control group were treated with traditional wound therapy.The results of treatment were evaluated.Results Time from debriding the wound infection to secondary suture was significantly shorter in patients of the experimental group ( P ＜ 0.05 ).The total number of dressing changes was very significantly less in patients of the experimental group ( P ＜ 0.01 ).The total cost of dressing in experimental group was significantly less than the control group (P ＜ 0.05 ).Conclusions The application of adhesive negative pressure suction apparatus in treatment of the wound infection after colorectal surgery can shorten the wound processing time,reduce the number of dressing changes and the total cost of dressing,thus has a high clinical value.

The microbial transformation of buflomedil by Cunninghamella blakesleana AS 3.153 was studied, as well as a microbial model which can be used to mimic metabolism of buflomedil in mammal was established. Experiments were conducted to screen the capabilities of four strains of Cunninghamella species to transform buflomedil, in which C. blakesleana AS 3.153 was selected for a preparative biotransformation. Furthermore, the microbial model was established based on the transformation condition optimization. The parent drug and its metabolites produced by C. blakesleana AS 3.153 were detected by liquid chromatography-mass spectrometry method and three metabolites were identified while two of them were new found metabolites. Two major metabolites, para-O-desmethyl buflomedil and 12-C-oxidated buflomedil, were isolated by semi-preparative HPLC. Based on the comparison between different species, the microbial transformation of buflomedil by C. blakesleana AS 3.153 is more similar to the metabolism of buflomedil in human and Beagle dog than that in rat.

Objective To summarize the experiences with minimally invasive pectus repair (Nuss procedure) for recurrent and acquired pectus excavatum after open thoracic surgery.Methods From Jun 2004 to Sep 2011,eighteen patients with recurrent or acquired pectus excavatum underwent Nuss procedure,including 12 males and 6 females The age ranged from 3.1to 14.8 years with mean age of (8.8 ±4.0) years.The body weight was 11 to 55kg with mean weight of (30.2 ±14.8 ) kg.Ten cases were recurrent pectus excavatum with previously failed open surgery repair,eight were acquired pectus excavatum after other open thoracic surgery.Sixteen cases had symmetrical and 2 had asymmetrical pectus excavatum.Haller' s index was 5.4 ± 3.4.The operation was performed with thoracoscopic assistance.Results All patients had successful operation with one bar insertion in each patient,one stabilizer was put on right side in seventeen and double stabilizers were put in one case.Therapeutic results evaluation was excellent in 16 cases and good in 2.Percentage of excellent and good was the same with that in our primary Nuss procedure ( P ＞ 0.05 ).Chest drainage duration was 1 to 4 days.One case had bar displacement revision 5 months later.Heart perforation occurred in one on whom a sternotomy and perforation repair were immediately performed.The echocardiography exam shows normal cardiac function after operation,and no nerve system complications were detected.One developed pneumothorax on operative day and one had pleural effusion three days later,both were treated by chest tube drainage.Twelve patients' bars were removed after 24 - 45 months of stagnation period.Anatomic results at bar removal were 10 excellent and 2 good,there were no recurrent cases.Conclusion Nuss procedure is an effective method and has good results on recurrent and acquired pectus excavatum.Safety of patients and complications minimization is always the first to be considered.