Objective To identify high?risk factors of white matter damage ( WMD ) in premature infants,in order to reduce the incidence and improve the prognosis of brain injury?Methods Five hundred and seventy?seven cases of preterm infants treated from January 2012 to December 2013 in the Pediatrics Department of Affiliated Hospital of Qingdao University were slecteted?According to MRI of the brain at 2 weeks after birth, all the patients were divided into WMD group(133 cases) and the control group(444 cases)?Single?factor and multifactor logistic regression were used for the analyses of the high?risk factors of WMD?Results WMD incidence was 23?05%( 133/577) in 577 cases of premature infants,with 108 cases( 81?2%) of focal injury,5 cases(3?8%) of diffuse injury and 20 cases(15?0%) of periventricular leukomalacia(PVL) injury?There was significant statistically difference in different gestational age( P=0?017)?Multi factor Logistic regression analysis showed that metabolic acidosis(OR=4?489,P=0?000),asphyxia(OR=3?519,P=0?000),perinatal infection ( OR=2?650,P=0?003) were independent risk factors for WMD,while cesarean( OR=0?293,P=0?000) was protective factor for WMD?Conclusion WMD is a complex interaction outcome of multiple risk factors in premature infant?Perinatal hypoxia and infection are the main risk factors of WMD in premature infants.

AIM To investigate the effect of ke tamine on ATP-sensitive K + currents (I K ATP ) in single airway smooth muscle (ASM) cells of asthmatic rat. METHODS Single ASM cells of asthmatic rat were isolated with enzymatic dissociation technique. Effect of ketamine on I K ATP in single ASM cells was studied using the whole-cell configu ration of patch clamp technique. RESULTS Ketamine opened the ATP -sensitive K + channel (K ATP channel) in a dose-dependent manner. When the concentrations of ketamine were 1?10 -7 ,1?10 -6 ,1?10 -5 and 1?10 -4 mol?L -1 , the amplitude values of I K ATP were increased to 63 86?19 33 pA/pF(n=8,P

Objective To investigate clinical features of chronic actinic dermatitis (CAD) in Kunming of Yunnan Province.Methods From October 2008 to October 2013,CAD in-patients in our hospital were selected and their general conditions,outcomes of photo-sensitive test and photo-patch test were analyzed in details.Results (1) Among 169 CAD patients,gender ratio (male:female) was 8.9:1.The lesions were mainly distributed on the exposed areas.(2) Photo-sensitive tests of 93 patients showed that the average value of UVA-MPPDwas 7.39 JPcm2 and that of UVB-MED was 20.91 mJPcm2.(3) The results of photo-patch test in 83 patients showed that 48 patients (67.8％) had positive reactions in patch test,and the most common contactant was balsam peru.Fifty-eight patients (69.9％) had positive reactions in photo-patch test indicating that the most common contactant in photo-patch test was balsam peru.Conclusions CAD appears mostly in the middle aged and the aged males and the lesions are mainly distributed on exposed areas.The most common contactants in photo-patch test are balsam peru and perfumed compounds.

Objective: To investigate the effect of comprehensive feeding intervention on feeding quality and weight gain of premature infants. Methods: Eighty-one premature infants admitted to the neonatal intensive care unit (NICU) of our hospital from September 2016 to December 2018 were selected and randomly divided into the intervention group (n=41) and the control group (n=40). Infants in the control group received routine nursing and infants in the intervention group were given comprehensive feeding intervention on the basis of routine nursing includingimproved Y type gastric tube, gravity tube feeding in prone position, oral movement intervention, colostrum oral immunotherapy and kangaroo nursing. The changes of feeding process were compared between the two groups and the occurrence of feeding intolerance in the two groups was observed. Results: The duration of tube feeding and hospital stay were lower in the intervention group than in the control group (P<0.05). No statistically significant difference was found in birth weight and body weight at discharge between the two groups (P>0.05), but the average daily weight growth rate [g/(kg·d) ] after 1 week and the milk volume [ml/(kg·d)] at 1 week were higher in the intervention group than in the control group(P<0.05). The incidence of gastric retention, abdominal distension and vomiting in the intervention group was lower than that in the control group, but only the difference in the incidence of gastric retention (24.4% vs 47.5%) was statistically significant (P<0.05). The incidence of feeding intolerance was significantly lower in the intervention group than in the control group (24.39% vs 47.50%, P<0.05). Conclusion Comprehensive nursing intervention can shorten the tube feeding time of premature infants, promote the weight growth of premature infants, improve the feeding quality, reduce the incidence of feeding intolerance, and reduce the hospital stay of premature infants, so as to reduce the hospitalization cost, improve the quality of life of premature infants, and increase the satisfaction of parents.