Persistent pulmonary hypertension of newborn (PPHN) is a clinical syndrome,characterized by pulmonary arterial pressure elevated relative to systemic blood pressure,leading to extrapulmonary right-to-left shunting of blood across the ductus arteriosus and foramen ovale,causing severe hypoxemia.Pulmonary vascular remodeling is pathognomonic of hypoxia-induced PPHN.The regulatory mechanism and cell composition of vascular wall were dysfunction,which led to vascular wall thickened.The review focus on three aspects,such as endothelial cells,smooth muscle cells,and adventitial cells,described the relation and the possible mechanisms between hypoxia-induced PPHN and pulmonary vascular remodeling.

Objective To compare the efficacy of laryngeal tube suction Ⅱ (LTS Ⅱ ) and ProSeal laryngeal mask airway (PLMA) for airway management during general anesthesia. Methods One hundred and twenty adult ASA Ⅰ or Ⅱ female patients, aged 30-50, with body mass index ＜ 30 kg/m2, undergoing general anesthesia for elective surgery were randomly divided into 2 groups ( n = 60 each) : PLMA group and LTS Ⅱ group. Each group was further divided into 2 subgroups: PLMA controlled ventilation group (group PC), PLMA spontaneous breathing group (group PS), LTS Ⅱ controlled ventilation group (group LC) and LTS Ⅱ spontaneous breathing group (group LS) . The rate of successful insertion was recorded. PetCO2 , peak airway pressure, lung compliance and incidence of gas leakage during controlled ventilation were recorded before operation, 10 min after the start of operation and at the end of operation. The tidal volume and PetCO2 were recorded in patients breathing spontaneously when the breathing was stable. The bucking and body movement were observed during removal of LTS Ⅱ or PLMA. The side effects in 24 h after surgery were recorded.Results Insertion was successful in all the patients. During either spontaneous breathing or controlled ventilation, the peak airway pressure was significantly higher in the patients with LTS Ⅱ than in the patients with PLMA ( P ＜ 0.05), and there wag no significant difference in the other ventilatory parameters between the two devices. There was no significant difference in the incidences of postoperative complications among the groups ( P ＞ 0.05) . Conclusion The efficacy of PLMA for airway manage ment is better than that of LTSⅡ during general anesthesia.

Objective:To investigate the correlation between intratumor microvessel density (IMVD) and lymph node micrometastases. Method: IMVD and lymph node micrometastases were stained with CD105 and CK19 antibody by immunohistochemical method of SABC respectively. Result:IMVD marked with CD105 antibody corre-lated with T stage and lymph node micrometastases(P<0.01). Conclusion: The result show that IMVD marked with CD105 antibody highly correlated with lymph node micrometastases. It could be a index to evaluate the prog-nosis of patients with pN_0 supraglottic laryngeal squamous cell carcinoma.

Objective To find T2N0M0 colorectal cancer patients at high risk for relapse or metastasis.Methods From January 1993 to December 2014,339 patients with histologically confirmed stage T2N0M0 primary colorectal cancer treated by radical surgery with complete clinical follow-up data were enrolled into this study.Survival rates were calculated using Kaplan-Meier method,and survival cures were compared using the Log-rank test.Cox proportional hazards model was used to analyze the significant factors defined in univariate test.Results The 5-year and 10-year overall survival rates were 83.0％ and 68.9％,respectively.Male gender,old age,lymphovascular involverment,perineural invasion,poor differentiation and invasive micropapillary carcinoma were associated with low cancer-specific survival rates in Kaplan-Meier analysis.Multivariate analyses revealed male gender,old age,lymphovascular involverment,poor differentiation and invasive micropapillary carcinoma as significant independent factors predicting poor prognosis.Conclusions Male gender,old age,lymphovascular involvement,poor differentiation and invasive micropapillary carcinoma are risk factors predicting poor prognosis for T2N0M0 colorectal patients.

Objective·To analyze changes in the type distribution and drug resistance of pathogenic bacteria isolated from burn wards and to provide evidence for rational use of antibiotics, reduction of drug-resistant isolates, and hospital infection control. Methods·Isolates from burn patients were collected from January 2011 to December 2014. Statistical analysis of infection sources, type distribution, and changes in resistance rates of main pathogens during the four year period was performed. Results·A total of 2399 isolates were collected, including 1286 (53.61%) gram-negative bacilli (G-b), 1088 (45.35%) gram-positive cocci (G+c), and 25 (1.04%) fungi. The most common G-b pathogens were Pseudomonas aeruginosa (447, 34.76%) and Acinetobacter baumannii (369, 28.69%). The most common G+c pathogen and fungus were Staphylococcus aureus (489, 44.94%) and Candida albicans (8, 33.33%), respectively. In the last two years, the detection rates of S.aureus and A.baumannii were significantly lower and the detection rate of P.aeruginosa was significantly higher than those in the first two years (P<0.05). P.aeruginosa and A.baumannii showed high resistance (>80%) to the third and fourth generation cephalosporins, carbapenems, aminoglycosides and quinolones, but the changes were not statistically significant (P>0.05). S.aureus was only highly resistant to penicillin (97.58%) and was 100% susceptible to vancomycin. Its resistance rates toward cefazolin, ampicillin/sulbactam, gentamicin, levofloxacin, and rifampin decreased significantly (P<0.05). The detection rate of methicillin-resistant S. aureus (MRSA) dropped from 72.28% to 63.00%. Conclusion·Many types of drug resistant bacteria were detected in burn wards. The drug resistance problem was serious. Improving management and rational use of antibiotics can reduce the occurrence of drug-resistant bacteria and increase the efficacy of clinical anti-infective treatment and nosocomial infection control.

Objective:To investigate the effect of live lactobacillus preparation in the treatment of postpartum vagina microenviro-ment dysbiosis. Methods:Totally 300 cases of postpartum women were selected in our hospital from February 2013 to November 2013, including those with normal delivery, cesarean section and vaginal delivery after lochia, and each was with 100 cases. The vaginal se-cretion was withdrawn from vagina and the microenvironment was assessed. The patients with dysbiosis were randomly divided into two groups, the observation group was treated with living lactobacillus preparation and the treatment group was without treatment. The effi-cacy and incidence of bacterial vaginosis(BV) were observed. Results:Totally 88 cases (29. 3%) occurred vaginal dysbiosis. There were significant differences in the dysbiosis incidence rate, pH, H2 O2 results, microscopic examination results and the distribution of flora between the two groups (P <0. 05). The effective rate of the observation group was 95. 5%, which was significantly higher than that of the control group (29. 5%). The incidence rate of BV was 4. 5% in the observation group, which was significantly lower than that in the control group [75%] (P<0. 05). Conclusion: The effect of the lactobacillus preparation in the treatment of postpartum vagina microenviroment dysbiosis is promising and safe.

Objective :To develop an agent that is more active against receptor-bearing target cells without increasing the toxic effect on non-target cells. Methods :By the use of molecular biology techniques,we designed and constructed a fusion protein 5＇IL6-TNF△ by connecting the human interleukin-6 (hIL-6) gene and a human tumor necrosis factor α derivative (TNF△) gene througha synthetic linker sequence followed by subsequent expression in E. Coli. Results: In cytotoxicity assay with myeloma cell line U266, the normal type of 5＇ IL6-TNF△ showed an antitumor activity 3 times higher than that of TNF△;and the antitumor activity of 5＇IL6-TNF△ blocked by IL-6Rwas only 1/30 of that of normal type of 5＇ IL6-TNF△. Meanwhile,the 5＇IL6-TNF△ blocked by an ti-TNF antibody did not show any cytotoxicity to U266 cells. In activity assay with L929 cells ,the toxic effect of the fusion protein was found 1/22 of that of TNF△. Conclusion: The 5＇IL6-TNF△fusion protein might be a useful cytotoxic agent in cancer treatment.

Objective To investigate the relationship between antibiotic use and antimicrobial resistance in Acinetobacter bau-mannii for rational use of antibiotics.Methods Antibiotic use density (AUD)of common antibiotics in hospitalized patients were collected in a tertiary hospital between 2006 and 2010.Clinical isolates of A.baumannii from those patients were collect-ed.The resistance to common antimicrobial agents were tested by disk diffusion method according to Clinical and Laboratory Standards Institute (CLSI,2012)guidelines.Relationship between antibiotic use and antimicrobial resistance in A.baumannii was analysed by SPSS 16.0.Results The resistant rates of A.baumannii isolated from inpatients were high.Consumption of cephalosporins and quinolones were large.There was a positive correlation between the resistant rate of A.baumannii to imi-penem and AUD of carbapenems (r=0.975,P <0.05).The resistant rate of A.baumannii to meropenem showed significantly positive relation to AUD of carbapenems (r= 0.975,P <0.05).Resistant rates of aminoglycosides,quinolones,cephalospo-rins and beta-lactamase inhibitors was not correlated to AUD of those antibiotics.Conclusions We should pay more attention to the high prevalence of resistant A.baumannnii strains.Application of imipenem and meropenem should be strictly controlled.Amikacin and beta-lactamase inhibitors are better choice for empirical antibiotic therapy in the treatment of infections caused by A. baumannii.

Objective To evaluate changes of regional cerebral metabolism by proton MR spectroscopy (~1H-MRS) in patients with minimal hepatic encephalopathy (MHE) and to correlate these changes with the neuropsychological test. Methods Fifty-four patients with cirrhosis including nine patients with hepatic encephalopathy (HE),23 patients with MHE,22 patients without HE and 13 controls underwent neuropsychological tests and ~1H-MRS scanning. The volumes of interest included occipital gray matter and left parietal white matter regions. Ratio of spectral peak areas of N-acetylaspartate (NAA),choline (Cho),myo-inositol (mI),and glutamine/glutamate (Glx) relative to creatine (Cr) were acquired. Statistical analysis was conducted using independent t test and one-way analysis of variance. The results of different groups were compared by using the nonparametric Mann-Whitney U test with Bonferroni correction. Correlations among the ~1H-MRS ratios, the grade of HE, neuropsychological test and ammonia data were calculated with Spearman correlation test. Results The ratios of NAA/Cr,Cho/Cr,mI/Cr,Glx/Cr of the occipital gray matter and left parietal white matter regions in patients with cirrhosis are 1.55±0.12,0.48±0.10,0.42±0.14,2.52±0.48 and 1.73±0.17,0.75±0.16,0.42±0.16,2.75±0.59respectively,and they are 1.53±0.10,0.48±0.09,0.51±0.11,2.20±0.39 and 1.69±0.15,0.82±0.14,0.53±0.12,2.40±0.40 in patients without HE,1.58±0.13,0.48±0.08,0.38±0.13,2.62±0.39 and 1.78±0.18,0.74±0.14,0.38±0.15,2.84±0.58 in patients with MHE,1.54±0.12,0.50±0.13,0.29±0.07,3.04±0.31 and 1.70±0.19,0.62±0.16,0.29±0.07,3.37±0.38 inpatients with HE.Compared with controls, decreased mI/Cr and Cho/Cr ratios and elevated Glx/Cr ratios were found in patients with cirrhosis (t=3.196,9.394,-6.527,P＜0.01,occipital gray matter. t=5.592,9.717,-6.681,P＜0.01,left parietal white matter＝ and in subgroup of patients without HE, with MHE and HE (F=5.097,25.896,20.204,P＜0.01,occipital gray matter.F=16.435,28.660,21.283,P＜0.01,left parietal white matter).Significant difference in these metabolic alterations was also found among the different groups of cirrhosis especially the ratios of Glx/Cr in occipital gray matter and left parietal white matter (P＜0.0084).The ratios of mI/Cr also significantly altered between patients without HE and with MHE (P＜0.0084).There was a significant negative correlation between the ratios of Cho/Cr,mI/Cr and the grade of HE (P＜0.01＝ and a significant positive correlation between the ratios of Glx/Cr and the grade of HE (r=0.709,P＜0.01,occipital gray matter; r=0.720,P＜0.01,left parietal white matter＝.NCT-A and DST of controls is (49±8) s and 39±6.They are (134±37),(83±26),(64±22) second and 15±2,25±9,35±8 in patients with HE,MHE and without HE respectively.The metabolic alterations of Cho/Cr,mI/Cr,Glx/Cr correlated significantly with neurepsychological tests in all subjects (P＜0.01＝.There was a significant positive and a negative correlation between the ratios of Glx/Cr and the data of NCT-A and DST respectively (r=0.570,-0.642,occipital gray matter; r=0.541,-0.632,left parietal white matter).The metabolic alterations of Glx/Cr had no correlation with ammonia data as well as other metabolic alterations.Conclusions ~1H-MRS study shows cerebral metabolic alterations of gray and white matter in patients with cirrhosis,especially the reduction in mI/Cr ratio and increase in Glx/Cr ratio. These changes correlate well with the neuropsychological tests and may be useful in predicting the presence of MHE.

Objective This study aims to evaluate the initial results of a hybrid procedure for treating descending thoracic aortic disease that involves distal aortic arch.It also intends to report our initial experience in performing this procedure.Methods A total of 45 patients(35 males and 10 females) with descending thoracic aortic disease underwent a hybrid procedure,namely,thoracic endovascular aortic repair(TEVAR) combined with supra-arch branch vessel bypass,in our center from April 2009 to August 2014.Right axillary artery to left axillary artery bypass(n =20) or right axillary artery to left common carotid artery and left axillary artery bypass(n =25) were performed.The conditions of all patients were followed up from the 14th month to the 77th month postoperative[mean(38.0 ± 17.1) months].Mortality within 30 days,complications such as endoleak after the hybrid procedure,and stenosis or blockage of the bypass graft during the follow-up period were assessed.Results One case of death and one case of cerebral infarction were reported within 30 days.Two patients underwent open surgery beacuse of endoleak.And a newly formed intimal tear was observed in one patient and the patient underwent a second TEVAR during the follow-up period.Condusion Initial results suggest that the one-stage hybrid procedure is a suitable therapeutic option for thoracic aortic pathologies that involve distal aortic arch.However,this procedure is not recommended for type-B aortic dissection,in which a tear is located in the greater curvature or near the left subclavian artery,because of the high possibility of endoleak occurrence.