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.

It is well known that pulmonary hypertension(PH) is one severe complication of bron-chopulmonary dysplasia( BPD) that is associated with high mortality. Aberrant pulmonary vascular growth, abnormal vasoreactivity and pulmonary vascular remodeling may ultimately lead to PH. Symptoms of PH of-ten overlap those of BPD itself. Furthermore,the emergence of symptoms may indicate that the disease has already progressed to a late, less reversible phase, thereby supporting arguments for screening all infants at risk. Echocardiography is non-invasive and widely available,and is currently the most commonly used screen-ing modality for PH in infants with BPD. Because the incidence of associated cardiovascular anomalies is high,cardiac catheterization and CT scanning of the chest should be considered in all infants who have signifi-cant PH despite optimal management of their lung disease. Early diagnosis and aggressive specific drug thera-py can improve the outcome for these patients.

Objective To observe the effect of static balance test and training equipment on the equilibrium function in children with spastic diplegia.Methods 24 children with spastic diplegia were treated with visual feedback balance training besides routine rehabilitation training.All cases were assessed with Berg Balance Scale(BBS) and the static balance test and training equipment when eyes opened and closed,before and after the 8-week training.Results After the 8 week-training,the BBS scores of all children were higher than that before training(P<0.05).In the segment of the static balance test,fall index,weight distribution index and stability index decreased significantly(P<0.05～0.01).Conclusion The equilibrium function of the children with cerebral palsy can be assessed and pertinent training can be performed with balance equipment.

Objective To explore the surface electromyography(EMG)characteristics of biceps brachii during isometric contraction in children with hemiplegic cerebral palsy.Methods The surface electromyograms signals of biceps brachii of 10 children with hemiplegic cerebral palsy during passive isometric contraction were recorded.Results The intact side registered a stronger EMG than that of the affected side,the integrated electromyography(iEMG)and root mean square(RMS)levels from the intact side were higher than those of affected side significantly(P<0.05).Conclusion The results of electromyographic analysis are consistent with Modified Ashworth Scale.Electromyographic analysis can provide a satisfactory evaluation of the muscle tone in children with hemiplegic cerebral palsy.

To investigate the effect of casein phosphopeptide-amorphic calcium phosphate(CPP-ACP) on the growth of Lactobacillus fermentum and to evaluate the possibility of CPP-ACP as a biological anticariogenic agent. Lactobacillus fermentum was inoculated in BHI with different concentrations of CPP-ACP and grew in anaerobic condition at 37 ℃ for 48 h. Used MTT method to evaluate the effects of CPP-ACP on the growth of Lactobacillus fermentum. CPP-ACP inhibited the growth of Lactobacillus fermentum effectively. With the concentration of CPP-ACP increasing, the values of A(550 nm) decreased. It was found that CPP-ACP had inhibitory effect on the growth of Lactobacillus fermentum, the inhibitory effect increased with CPP-ACP concentration.

Objective Exploring different strengthening immune strategy on long-term immune memory effects for tuberculosis vaccine lays the theoretical foundation.Methods The fusion protein AMM,adjuvant DDA and BCG-PSN mixed built AMM subunit vaccine.Choose only 50 C57BL/6 mice (SPF),according to the table of random number method was divided into 5 groups and each group 10 only,the experiment 1 group injected mice to phosphate buffer solution (PBS) as control; Experiment 2 mice only injected BCG vaccine (BCG) from early; Experiment 3 mice BCG initial free,in 10 weeks with AMM subunit vaccine strengthen immunity; The four mice from early after BCG,respectively on 8 weeks,10 weeks with AMM subunit vaccine strengthen immune mice one time.Experimental 5 groups of mice after BCG initial free,respectively on 6 weeks,8 weeks,10 weeks with AMM subunit vaccine strengthen immune mice a.28 weeks to remove spleen lymphocytes in mice,add 2.5μg/ml Ag85B stimulus 72 h after collecting spleen cell culture supernatant,with ELISA test Ag85B specificity splenic lymphocyte caused IFN ppar-gamma level.Results Spleen cells by antigen Ag85B stimulation,BCG initial free,AMM subunit vaccine strengthen immune once,twice,three times group and PBS compared all had difference (P ＜0.01 orP ＜0.05) ;BCG initial free-AMM subunit vaccine strengthen immune once,twice,three times group and BCG compared all had difference (P ＜0.01 or P ＜0.05) ; BCG initial free-AMM subunit vaccine strengthen immune once and twice or three times group compared with difference (P ＜0.01 orP ＜0.05) ; Initial free-AMM subunit vaccine strengthen immune two group and three times than group difference was statistically significant (P ＞0.05).Conclusion Mice strong immune strengthened the number is not the more the better,the appropriate number of strengthen the immune to induce the most lasting immunity memory,subunit vaccine strengthen immunization strategy may affect the immune memory is one of the important factors.

Objective To understand the pathogenic characteristics of intra-abdominal infection after appendecto-my in patients with appendicitis.Methods Clinical data of patients undergoing appendectomy in a hospital from January 2013 to December 2015 were analyzed retrospectively,pathogenic characteristics,treatment,and prognosis of patients with intra-abdominal infection were analyzed.Results A total of 431 patients undergoing appendectomy were investigated,38 (8.82%)developed intra-abdominal infection.36 strains of pathogenic bacteria were isolated, 34 (94.44%)of which were gram-negative bacteria,mainly Escherichiacoli(n=29,80.55%);2 (5.56%)strains were gram-positive bacteria,1 of which was Staphylococcusaureus,and the other was Enterococcusavium.The re-sistance rates of 29 strains of Escherichia coli to commonly used antimicrobial agents (amoxicillin,piperacillin,ti-carcillin,cefuroxime,ceftazidime,and cefalotin)were 72.41%-93.10%,none of strains were found to be resistant to piperacillin/tazobactam,meropenem,imipenem,and amikacin.Conclusion Escherichiacoli is the most common pathogen causing intra-abdominal infection after appendectomy and it has high resistance rates to most commonly used antimicrobial agents,piperacillin/tazobactam,amikacin,and carbapenems are recommended for treating intra-abdominal infection after appendectomy.

Objective To investigate the relationship between air pollutant exposure and preterm delivery (PTD) by Logistic regression model, as the effect of air pollutant exposure to PTD made great concern today. Methods The present study consisted of 31 145 qualified birth cases, 80.09% of the total amount, from 1 Nov, 2005 to 1 Aug, 2007. The covariant items included maternal age, nation, education, residence, income, occupation, occupation exposure, parent-drinking, father-smoking, heating-type, folic acid supplement, season of pregnancy, prenatal health care, etc. The Logistic regression analysis was employed to control the confounding factors mentioned above, then the pollutant was introduced step by step to build the single, double and triple pollutant Logistic regression model to examine the association between three pollutants (SO2, NO2, and PM10) and PTD during the first and third trimesters of pregnancy. The air monitoring data (daily average of SO2, NO2, and PM10) were collected from Taiyuan Environmental Monitoring Station. Results In the first trimester, a quartile increase of NO2 exposure caused the risk for PTD increased by 22.7%. As for the effect of PM10, no significant differences were seen. In the third trimester, a quartile increase of NO2 exposure caused the risk for PTD increased by 19.1%. Conclusion The NO2 exposure during the pregnancy can increase the risk of PTD. The susceptible exposure-window choice is critical for the further study in this field.

0.05). The cells on Ti1 and Ti2 were attached well till confluent.Conclusion:The neotype titanium alloys are biocompatible.