Objective To know the effect ofof the particulates sampled from the air of the railway transport station of hazard chemicals on rat typeⅡpneumocytes and the antagonism of antioxidants. Methods The rat typeⅡpneumocytes cultured by routine method were pre-treated with antioxidants N-acetylcysteine (NAC), Vitamin C and Vitamin E, then were exposed to the abstract of particulates. The damages of rat typeⅡpneumocytes and DNA cross-links were detected with MTT assay and ethidium bromide fluorescence assay. Results The abstract of particulates caused obvious damages and DNA cross-links in the rat typeⅡpneumocytes and the significant dose-effect relationship was seen. NAC, Vitamin C and Vitamin E reduced significantly the damages and DNA cross-links. Conclusion Abstract of the particulates sampled from the air of the railway transport station of hazard chemicals may induce the damages and DNA cross-links in rat typeⅡpneumocytes and these adverse effects can be antagonized by antioxidants such as NAC, Vitamin C and Vitamin E.

The paper analyzes the age structure, educational background, occupation, income, migration and other sociological features of migrant workers in cities in present China and discusses the general health status of the group, including the incidence and spread of contagious diseases, workplace accidents and occupational hazards, reproductive and psychological health, and social adaptation. It also puts forward policy suggestions for improving the health status of migrant workers and raising their health level from the perspectives of perfecting the social security system, giving expression to impartial health services, showing concern for the health status of vulnerable populations, enhancing health education and promoting health.

Objective To investigate the micronucleus frequency in mice peripheral blood reticulocytes induced by air particulate pollutants in a railway transport station of chemical dangerous goods (RTSCDG) Methods Male BALB/C mice were selected and randomly divided into exposure groups and control groups One time exposure experiment was carried out among mice exposed to acetone extracts of air particulate pollutants at doses of 20,40,80,160 mg/kg by intraperitoneal injection Multiple time exposure experiment was carried out among mice exposed to acetone extacts of air particulate pollutants at dose of 10 mg/kg by consecutive intraperitoneal injection one time per day for 5 days The peripheral blood was sampled from mice tails and the micronucleus frequencies in reticulocytes were observed at 24, 48 and 72 h after the exposure Results The frequencies of micronuclei in peripheral blood reticulocytes revealed good time response relationship and reached the highest levels at 48 h after exposure,at the same time the frequencies of micronuclei in dose groups of 20,40,80,160 mg/kg were all higher than those in control group The multiple frequencies exposure experiment with lower dose showed that the frequencies of micronuclei in peripheral blood reticulocytes in exposure group always revealed significantly higher levels compared with those in control group during the 24th~72th hour after the exposure ( P

Objective To retrospectively analyze the effect of two kinds of biological agents in volume -re-duced bullae .Methods 11 patients who suffered from bullae were operated under large C-arm locating ,and infused two kinds of biological agents through micro catheter of fibreoptic bronchoscopy .All of them were randomly divided into the two groups .The biological agents in group A were fibrinogen and diluent thrombin , and that of group B was Porcine Fibrin Sealant Kit .In group A,the micro catheter with diameter of micro thread less than 1.2mm was placed in bullae through fibreoptic bronchoscope ,and then the 2mL lidocaine,5 ml fibrinogen,and double of 500u diluent thrombin were inproperorder injected through micro catheter .In group B,the Porcine Fibrin Sealant Kit was injected at the same method,and then the suspension fluid was exacted .The operation time was recorded ,and then the clinical efficacy and incidence rate of complications were compared .Results The operation time of group A was 5-15 minutes, and that of group B was 6-20 minutes.For all the patients ,4 cases were totally effective ,2 cases were significantly effective,and 2 cases were totally non-effective.The total effective rate was 81.82%(9/11).The incidence rates of common complications in group A and B were 52.38%(22/42),58.33%(14/24),respectively,the difference was not significant (χ2 =0.22,P>0.05).Moreover,there were no serious complications in all cases .Conclusion The security and effect of two kinds of biological agents might be well enough ,but in view of less cases ,they were worth to further popularized and applied in clinical practice .

Objective To retrospectively analyze of clinical application of BF-XP60 micro-bronchoscopy.Methods 135 clinical data of patients who adopted ultrafine micro-bronchoscopy and intervention were collected and analyzed for the complications.Results The frequency of local rhinomusoca damaging and errhysis was in 3 cases,the mucous of the glottis damaging and errhysis was in 2 cases,local mucous of the tracheal bronchus errhysis was in 3 cases.After intervention,the frequency of fever was in 13 cases,massive haemorrhage was in 1 case,pneumothorax was in 1 case,chest pain was in 2 cases,part fiber of inner untrafine micro-bronchoscopy broken was in 2 cases,check failure due to ultrafine micro-bronchoscopy broken in trachea was in 4 cases,and arrhythmia,asphyxia,and death were in 0 case.The overall incidence of side effects was 22.9％ (31/135).Conclusion Application of ultrafine micro-bronchoscopy was contributed to find the lesions within the bronchioles and around the lungs,moreover,it could evaluate the distal bronchus of airway obstruction which was planned to adopt intervention.The topic that how to reduce the incidence of the side effects of the micro-brohchoscopy and improve the success rate and safety of inspection and intervention was worth to be concerned.

Objective To preliminaryly explore the effect and adverse reaction of Marine Injection combined therapy through local spray in benign tracheobronchial stenosis.Methods 19 cases of bronchial tuberculosis were collected in our department.By assessing cough,shortness of breath and other symptoms,chest high -resolution CT (HRCT)of three -dimensional reconstruction,and length were observed by ultrafine bronchial stenosis.According to the pathogeny and types of stenosis,combined multiple intervention were sequentially adopted,and then Marine Injec-tion was sprayed through one -off endoscopic spray tube.All the subjects were divided into the two groups,the higher concentration Marine injection (1 200 mg/mL)group was chosen with the condition of serious inflammation,edema, ulcer and necrosis,obvious local granulation tissue hyperplasia,severe scar stenosis,and the length of stenosis greater than 2 cm or the sectional area of stenosis less than 50% of the normal sectional area,otherwise the low concentration (600 mg/mL)group was chosen.The subjects were reexamined by clinical symptoms,high -resolution CT (HRCT) of three -dimensional reconstruction,and ultrafine bronchoscopy a week after the surgery to dynamically observe the local changes.Depending on the situation,the injection was sprayed once a week,adding up to 2 -4 times.Follow -up visit lasted for 3 months,cough,expectoration or hemoptysis,and dyspnea were observed.Results 11 cases were effective fully,17 cases were effective substantially,7 cases were ineffective,the total effective rate was 80% (28 /35).The overall complication rate was 42.8% (15 /35),no deaths occurred.No complications related to local spra-ying of Marine were seen.Conclusion Local spray of Marine Injection may have preferable effect that inhibits scar formationand prevention airway restenosis.It is worth further study with a high security,precise clinic effect,easy oper-ation and etc.

Objective To explore the security and its influencing factors on benign airway stenosis treated with interventional of high pressure balloon expansion catheter.Methods Clinial data of 39 cases of inpatients suffered from benign airway stenosis were chosen.17 cases were male,and 22 cases were female.The ages of them ranged from 15 to 83 years old.According to the clinical symptoms,HRCT 3D reconstruction,and the results of bron-choscope,all patients were treated with balloon expansion catheter at different criterions.The balloon catheter with size that slightly smaller than the targeted normal bronchial tube was chosen,expansion for average 1 -4 times,single balloon expansion time ranged from 0.5 to 4 min,the pressures were kept at 3 -6 atmosphere,and the highest pres-sure did not exceed 8 atmospheric pressure.The efficacy and complications were retrospectively analyzed.Results 19 cases were completely effective,14 cases were basically effective,6 cases were completely ineffective,and the total effective rate was 84.6% (33 /39 ),the incidence of complications was 35.8% (14 /39 ),moreover,no deaths occurred.Conclusion High pressure balloon catheter expansion is one of commonly used technology in breathing interventional treatment;it has the characteristics of easy operation,and immediate curative effect,and so on.But if the improper operation,incorrect selection of the case,or inaccurate evaluation of the stenosis during operation,serious complications and unnecessary iatrogenic injury can be occurred.Therefore,it is worthy of attention and further summarizing by breathing interventional physicians.

Objective To investigate the relationship between early infant eczema and cord blood interleukin(IL)-36γ level.Methods Fifty-nine full-term healthy newborns were selected as the study subjects.General information was collected including gender,birth weight,delivery method,gestational age,maternal age,physical fitness during pregnancy(diabetes,infection,hyperthyroidism and other complications),family history of allergies and intake times of seafood during pregnancy≥3 times.The level of IL-36γ in umbilical cord blood after birth was detected by enzyme-linked immunosorbent assay.The presence and severity of eczema within 42 days were followed up.Multivariate Logistic regression was performed to analyze the influencing factors of early infant eczema,and receiver operating characteristics(ROC)were plotted to evaluate the diagnostic effectiveness.Results Among 59 infants,40 had eczema,of which 35 were mild,5 were moderate and 19 were eczema free.The proportion of seafood intake times≥3 and the level of IL-36γ in umbilical cord blood were higher in the eczema group than those in the no-eczema group(P＜0.05).There was no significant difference in IL-36γ level in cord blood between mild and moderate eczema patients.Multivariate Logistic regression analysis showed that the increased level of IL-36γ in umbilical cord blood and≥3 intake times of seafood during pregnancy were risk factors for early infant eczema(P＜0.05).ROC results showed that the AUC(95%CI)of umbilical cord blood IL-36γ was 0.743(0.611-0.874),sensitivity was 87.6%,specificity was 57.9%,and truncation value was 103.823 ng/L.Conclusion The elevated level of IL-36γ in umbilical cord blood is an independent risk factor for early infant eczema,and early detection is valuable for predicting the occurrence of infantile eczema.

【Objective】 To investigate the correlation of the levels of interleukin-25 (IL-25) and interleukin-33 (IL-33) in cord blood with the development of infantile eczema within 42 days after birth, so as to provide theoretical support for the prevention of early infant eczema. 【Methods】 A total of 145 newborns who met the inclusion criteria and were born in the Obstetrics and Gynecology Department of the Air Force Special Medical Center from September 2020 to September 2021 were selected. Cord venous blood was collected at birth and the levels of IL-25 and IL-33 in cord blood were measured. The occurrence and severity of infantile eczema were recorded in 42 days. 【Results】 Among 145 infants, 79(54.5%) suffered from eczema. The level of IL-25 in cord blood in eczema group was significantly lower than that in non-eczema group (Z=4.957, P<0.001), and the level of IL-33 in cord blood in eczema group was significantly higher than that in non-eczema group (Z=4.594, P<0.001). The proportion of family history of allergy in the eczema group was significantly higher than that in non-eczema group (χ²=4.693, P<0.05). Logistic regression analysis showed that family history of allergy (OR=4.296), lower level of IL-25(<14.5pg/mL) (OR=4.034) and higher level of IL-33(>21.1pg/mL) (OR=2.759) in cord blood were risk factors for eczema (P<0.05), while birth weight was not associated with the onset of eczema in infants at 42 days (P>0.05). Meanwhile, the level of IL-33 in cord blood was related to the mode of delivery (P<0.05). ROC analysis showed that the optimized positive cutoff value was <14.0pg/mL for cord blood IL-25(sensitivity 62.0%, specificity 75.8%) and >22.1pg/mL for IL-33 (sensitivity 64.6%, specificity 69.7%). Spearman correlation test found that there was a linear correlation of the level of cord blood IL-33 with eczema area and severity index (EASI) score (r=0.398, P<0.01). 【Conclusion】 Family allergy history, lower level of cord blood IL-25 and higher level of cord blood IL-33 are important influencing factors of infant eczema in 42 days after birth, and higher level of cord blood IL-33 will aggravate the severity of early infantile eczema.