Objective To investigate the impact of pregnancy complications and gestational exposure to toxic chemical on birth defect,to provide scientific basis for effective intervention measures.Methods 11 studies were included,the quality evaluation and information extraction were carried out on the studies according to include and exclude standard.3 248 examples in case group and 5 722 examples in control group.Fixed or random effects model was used according to heterogeneity test results,and the combined result was analyzed by Chi -square test.The publi-cation bias of the studies was also evaluated.Results The combined results of single factor analysis of pregnancy complications was 1.074(0.926 -1.222),showed that pregnancy complications were risk factors of birth defects.The combined results of single factor and multiple factors analysis of gestational exposure to toxic chemical were 1.426 (1.147 -1.704),1.421(1.174 -1.668),also showed that gestational exposure to toxic chemical was a risk factor of birth defects.Conclusion Pregnancy complications and gestational exposure to toxic chemical are risk factors of birth defects,this targeted provides reference to birth defects prevention.

There are multiple sophisticated approaches that can be used in estimations on health effects resulting from environmental pollution. By comparison, human capital approach and averted expenditure approach are not suitable to be the first choice because of the insufficient capability of capturing all aspects of health effects. Date availability and estimation extrapolation limit the application of hedonic wage approach and hedonic price approach. It has been accepted universally for the flexible technique provided by contingent valuation approach that any health effects can be separately evaluated depending on researchers' purposes. Based on the powerful macroeconomic theory, general equilibrium theory, the CGE model is powerful to simulate the mechanism of interaction between multi-sectors with a national economic system so as to objectively reflect the health impacts on national economy due to environmental pollution.

Objective To synthesize 628F-Py-AMD3465,to investigate its biodistribution in mice and to perform the microPET/CT imaging on mice bearing human lung cancer cell (A549).Methods AMD3465 quaternary ammonium salt precursor was directly labeled with 18F,then 628F-Py-AMD3465 was synthesized through nucleophilic reaction,hydrolysis,neutralization and the product was purified using HPLC.The labeling yield and radiochemical purity were analyzed by HPLC.Fifteen Kunming mice were injected with 5.55 MBq of 628F-Py-AMD3465 and sacrificed at 5,20,40,60 and 120 min postinjection.The selected tissues were harvested and weighed,and the radioactivity in the tissues was measured by an automated γ-spectrometer.The ％ID/g was calculated.MicroPET/CT studies were performed on A549-bearing mice after injecting 6-18F-Py-AMD3465 through vena caudal.Paired t test was used.Results 6-18F-Py-AMD3465 was successfully synthesized with the labeling yield of (9.0±2.0)％,the total synthesis time was about 60 min,and the radiochemical purity was more than 98％.Biodistribution studies showed that the radiouptake was higher in the kidneys and bladder of normal mice,which demonstrated that 6-18 F-Py-AMD3465 was mainly excreted through the kidneys.Biodistribution in A549-bearing mice was similar to that in normal mice.The tumor/muscle ratio at 40 min was 5.0,but the radiouptake of the tumor was still lower than that of the normal lung:(8.05±0.35) ％ID/g vs (9.33±0.66) ％ID/g;t=5.26,P＜0.05.MicroPET/CT imaging showed that the high-uptake location of 6-18F-Py-AMD3465 in tumor-bearing mice was similar to the normal mice,and the tumor uptake reached the maximum level at 45 min post-injection (SUV 0.67).Conclusions 6-18F-Py-AMD3465 can be synthesized by a simple method.A lower uptake could be shown in the tumor compared to that in the lung and the tracer has limited diagnostic value for lung cancer.

Objective To establish computable general equilibrium model, CGE, and assess health impact of air pollution on national economy in China. Methods Based on the current concentration-response relationships provided by international and domestic epidemiological studies, the authors estimated the labor loss and excess medical expenditure led by China's air pollution, 2000. In order to elucidate the mechanism of the health impact on national economy, a computable general equilibrium model containing 39 sectors and 32 commodities was constructed for China. Results The simulation of the model indicated that the health impact due to air pollution has led to a GDP loss by 0.38‰ (95% CI 0.162‰-0.511‰) in China, 2000. Conclusion Air pollution not only has adverse effect on human health, but also retards the development of national economy.

The existing frameworks of integrated assessment on air pollution-induced health effects can be classified into four types, i.e. U.S. EPA framework, U.S. Harvard University framework, Thailand framework and China framework. As the intention of integrated environmental assessment is to provide a scientific warranty for sustainable development-related policymaking process, the authors made a systematic review for the four types of integrated assessment framework. Not only the strong points and disadvantages in each type of framework were analyzed in detail, but also suggestions for future improvement in integrated assessment were put forward.

Objective:To explore the solutions to enhance the professional skills and humanistic quality of neurosurgery in theprimary hospitals, and to improve the neurosurgery medical care level.Methods: a comprehensive analysis of the literature retrieval as well as information collected in practice the first hospital of Zhangjiakou in, extract the problems of neurosurgeon training in primary hospital, to carry out grading treatment requirements, explore the basic path to improve the clinical ability of primary hospital neurosurgeon, and through the establishment of standard clinical operating procedures and systems to ensure the quality of medical service.Results: from Wanfang database retrieved from 2006 to 2015 research journals in Chinese on improving grassroots doctors ability of 819 papers, bibliometric analysis shows that the trend is increasing year by year, in 2015 issued a number is 5.21 times in 2006. There are 28 papers including neurosurgery area, accounting for 3.42% of the total number of papers; the hot topics focus in the mode of training neurosurgery doctors in primary hospitals,transfer the technology of minimally invasive neurosurgery and spreadmodern neurosurgery theory and knowledge.Conclusion: to improve the ability of doctorsof primary hospitals should be combined with the characteristics of local diseasesand primary hospital neurosurgeon status, from making training plan, appropriate to establish the corresponding clinical standard, promote the essential neurosurgery technology, in order to ensure implementation of the tiered diagnosis and treatment .

Using hitochemical techniques showing cholinesterase and catecholamines,weinvestigated the changes of these neurotransmitters in the sympathetic nervous centers(posterior nucleus and lateral area of hypothalamus,as well as intermediolateralnucleus of spinal cord)of acupunctured rats,and compared with those in the cor-responding nuclei and area in normal controls.A total of 109 cases were performed,among which 73 cases were of acupunctured and 36 cases were of controls.Theresults obtained were as follows:(1)It was shown that the number of cases withstronger activity of acetylcholinesterase in sympathetic nervous centers of acupunc-tured group was higher than that of controls.The more obviously elevated in painthreshold after acupuncture,the higher number of cases with stronger ACHE enzy-matic activity in the sympathetic nervous centers was evident.(2)The number ofcases with stronger intensity of NA fluorescences within the adrenergic fiber's terminalsof sympathetic nervous centers was found to be higher in acupunctured group thanthat of control group.On the basis of the results obtained,the possible relationship between the effectsof acupuncture and the changes of neurotransmitters in sympathetic nervous centerswas discussed.We considered that the sympathetic nervous centers might have beeninduced into a relative inhibition state following acupuncture,and this state is ingood coincidence with the increase of NA in adrenergic fiber's terminals.

·AIM: To investigate a surgical method of modified lensectomy within combined lensectomy and vitrectomy surgery in traumatic eyes.·METHODS: Clinical records were studied retrospectively for a series of consecutive 27 traumatic patients who were performed vitrectomy combined with lensectomy surgery. A modified lensectomy through pars plana incision of sclera was performed to these cases and lens capsule was reserved. It was then combined with vitreous and retinal operations.·RESULTS: All lens were removed completely with lens capsule remained. All cases achieved improved visual acuity.Intraocular pressure (IOP) in all eyes was in normal range after surgery.·CONCLUSION: The modified lensectomy is a safe and effective surgery manner which has few complications and is more suitable for traumatic eyes in the combined lensectomy and vitrectomy surgery.KEYWORDS:ocular trauma; lensectomy; vitrectomy

Objective To carry out the quality control testing and evaluation for three digital mammography systems.Methods The performance of three digital mammography systems was assessed by applying methods recommended in the European guidelines for quality assurance in breast cancer screening and diagnosis and Chinese specification for testing of quality control in X-ray mammography.The performance of X-ray generator of three digital mammography systems were tested and evaluated.CDMAM 3.4 phantom with four different thickness(30,40,50,60 mm) were exposured in DR,PCM,and CR system,respectively.The average glandular dose (AGD) value was measured and image quality figure (IQF) analysis was performed in each thickness.Results The X-ray machine performance of DR and CR was in accordance with existing standard,however the standard was inappropriate to evaluate part of X-ray machine performance of PCM system.The AGDs for system DR were 1.20,1.42,1.75 and 2.20 mGy for 30,40,50 and 60 mm PMMA thickness,respectively.The respective AGDs for system PCM and CR were 0.82,1.19,1.33,1.70 mGy and 0.59,0.88,1.47,2.19 mGy.For the same phantom thickness sequence,the IQFs were 21.36,21.57,27.25 and 30.58 for system DR,28.02,29.10,35.90,and 41.24 for system PCM,whereas they were 39.78,39.30,43.85 and 48.08 for system CR.Conclusions The AGDs of all three systems were in accordance with the values recommended in European guideline.The AGD and IQF could provide an effective way for performance assessment and constancy checks for digital mammography systems.

Purpose To exp1ore the expression and c1inica1 significance of epiderma1 growth factor receptor( EGFR)and human epi-derma1 receptor-2(HER-2)in co1orecta1 carcinoma. Methods Immunohistochemistry(IHC)PV-9000 was used to detect the expres-sion of EGFR and HER-2 in 78 cases of co1orecta1 carcinoma. Si1ver in situ hybridization( SISH)was used to detect HER-2 amp1ifica-tion in co1orecta1 carcinoma. Results The positive rates of EGFR in 78 co1orecta1 carcinomas were 69. 23%( 54/78 ). The differ-ences of the expression of EGFR between different depth of invasion group and 1ymph node metastasis group were statistica11y signifi-cant. The differences of the expression of EGFR between different aging group,gender group,tumor size,different histo1ogica1 grading group and Dukes stage were insignificant. The positive rates of HER-2 in 78 cases of co1orecta1 carcinoma were 25. 64%(20/78). The differences of the expression of HER-2 between different depth of invasion group and 1ymph node metastasis group were statistica11y sig-nificant. The differences of the expression of HER-2 between different aging group,gender group,tumor size,histo1ogica1 grading group and Dukes stage were insignificant. The expression of EGFR and HER-2 was positive1y corre1ated. Among the 20 cases of HER-2 protein overexpression,10 cases showed HER-2 gene amp1ification,15 cases showed HER-2 protein overexpression(~)by IHC and 10 cases showed HER-2 gene amp1ification by SISH. The rate of HER-2 gene amp1ification was 66. 67%. 5 cases with 1ow HER-2 protein overexpression( +)and no case showed HER-2 gene amp1ification. Conclusions EGFR and HER-2 are high1y ex-pressed in co1orecta1 carcinoma. EGFR and HER-2 expression is connected to invasion and metastasis process of co1orecta1 carcinoma. The both may be synergy. The corre1ation between HER-2 protein overexpression(~)and HER-2 gene amp1ification is statisti-ca11y significant. Therefore,immunohistochemistry can be regarded as an initia1 screening method for HER-2 gene amp1ification,and then SISH testing shou1d be done as we11 to confirm the resu1t. It is usefu1 for mo1ecu1ar target therapy to detect HER-2 status in co1or-ecta1 carcinoma.