Objective To study the distribution characteristics of radon progeny at different air quality index (AQI) and evaluate health risks for the exposed population.Methods EQF3120 Monitor was used to monitor the concentration of radon and its daughters.The relevant air quality data was provided by the environmental monitoring station at Suzhou Industrial Park.SPSS 16.0 software was used for statistical description,principal component analysis and simple correlation analysis.Environmental radon exposure-caused effective dose to lung region was estimated by using the radon dose formulas.Results Radon progeny in fog haze weather in winter of Suzhou Industrial Park had relationships with NO2,SO2,O3,PM10 and PM2.5.The correlation coefficient of 214Bi were 0.741,0.681,-0.431,0.597 and 0.675.The correlation coefficient of radon progeny with PM2.5 was greater than that with PM10.When AQI ＞ 200,the effective dose to residents outdoor from radon and its short-lived progeny was 0.63 mSv/a.Conclusions Higher AQI results in higher concentration of attached radon progeny.There is little variation in concentration of unattached radon progeny.Fog and haze can increase exposure of the population to inhalated radon.

Objective To investigate and compare the effects of pretreatment with different concentrations of trarnadol and morphine on the differentiation of hunan helper T cells (Th) in vitro. Methods Fifteen ASA Ⅰ patients of both sexes (8 males, 7 females) aged 23-59 yrs scheduled for minor day-care surgery were enrolled in this study. The patients had never taken morphine and tramadol before. Blood samples were taken from peripheral vein. Whole blood and mononuclear cells isolated from peripheral blood (PBMCs) were incubated with morphine 10, 100 or 1000 ng?ml-1(group M1 , M2 , M3) or tramadol 50, 500, 5000 ng?ml-1(group Q1, Q2, Q3) for 24 h. Then irrntants was added and incubated for another 5 or 24 h. In the whole blood the level of IL-2 and IFN-?(as markers of Th1 cells) and IL-4 and IL-10 (as markers of Th2 cells) were determined using three-color flow cytometry. In PBMCs the expression of CD4+ and CCR5+ (as markers of Thl cells) and CD4+ and CCR3+ (as markers of Th2 cells) were determined. The Th1/Th2 ratio was calculated. Results Pretreatment with morphine or tramadol significantly increased the number of Th2 cells while the number of Thl cells significantly decreased both in a dose-dependent manner leading to a significant decrease in Th1/Th2 ratio. Conclusion Tramadol and morphine can inhabit in vitro the cellular immune function in dose-dependent manner. The immunosuppressive effect of tramadol is less than that of morphine.

Objective To evaluate the effect of minocycline on the long-term cognitive function after partial hepatectomy in mice.Methods Sixty-four male C57BL/6 mice,aged 3 months,weighing about 20 g,were randomly divided into 4 groups (n =16 each) using a random number table:control group (group C),partial hepatectomy group (group O),PBS group,and minocycline group (Mino group).At 3 days after partial hepatectomy,the rats underwent Morris water maze test.The animals were sacrificed and their hippocampi were immediately removed for determination of tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) mRNA (using real-time fluorescent quantitative PCR) and nuclear factor kappa B (NF-κB) expression in the nuclcar protein of the cells (using Western blot).After the mice regained consciousness after operation,minocycline 50 mg· kg-1 · d-1 was injected intraperitoneally for 30 consecutive days in Mino group,while the equal volume of PBS was given instead of minocycline in group PBS.The parameters mentioned above were then recorded.Results Compared with group C,the escape latency and swimming distance were significantly prolonged,and the expression of TNF-α mRNA,IL-6 mRNA and NF-κB was up-regulated in group O (P ＜ 0.05).Compared with group PBS,the escape latency and swimming distance were significantly shortened,and the expression of TNF-α mRNA,IL-6 mRNA and NF-κB was down-regulated in group Mino (P ＜ 0.05).Conclusion Minocycline can improve the long-term cognitive function after partial hepatectomy in mice and inhibition of inflammatory responses in hippocampi is involved in the mechanism.

Objective To evaluate the effect of posteromedial combined with lateral surgical approach in treatment of trimalleolar factures.Methods The clinical data of 37 patients with trimalleolar factures underwent open reduction and internal fixation through posteromedial combined with lateral surgical approach were retrospectively ana-lyzed.There were 21 males and 16 females with average age of 55.0 years (ranged 35 -80).Complications such as infection,nonunion,fixation failures were observed.All patients were followed up at 6 months and 12 months after sur-gery and assessed functionally with American Orthopaedic Foot and Ankle Society Scores (AOFAS).After the 12 month follow up,the patients were also called for a radiological examination.Results Average follow -up time was 18.8 months (12 -27 months).All cases had no complications such as incision infection,skin necrosis,internal fixator loosening or rupture and bone nonunion.Using AOFAS,the scores were 82.9 and 89.7 respectively at the 6 month and 12 month follow up.The degree of arthrosis was grades Ⅰ in 2 ankles,Ⅱ in 1 ankle,and Ⅲ in 1 ankle according to Kellgren&Lawrence.Conclusion Posteromedial combined with lateral surgical approach for the treat-ment of trimalleolar factures has leaded to an satisfactory clinic outcomes.It is minimally invasive and has less compli-cations and cost.

Objective To evaluate the clinical characteristics and surgical risks for elderly patients with gastric cancer. Methods The clinical data from 607 patients, who received surgical therapy for gastric cancer between January 2006 and December 2009, were retrospectively analyzed.Among them, 267 patients were over 65 years of age, and the other 340 patients (≤65 years of age)were served as control. Complete surgical resection was done by doctors in same group. The preoperative complications such as cardiopulmonary disease and post-operative complications as well as pathologic patterns were compared between two groups. Results Coexisted diseases were found more in elderly patients than in controls (68.91% vs 31.63 %, P＜0.01). Whereas there was no significant difference between two groups with respect to post-operative complication [28. 19% (75/267)vs 25.59 % (87/340)]. However, the incidence of cardiopulmonary complications, especially pulmonary infection, was higher in elderly patients than in controls (17.23% vs 5.29% ,P＜0.01). The digestive tract complications were related to the pattern of radical operation. Post-operative complication occurred less in patients treated with D1 radical operation than those with D2 and D3 radical operation.Conclusions The incidence of post-operative complication in elderly patients with gastric cancer was closely related to the surgical method. The elderly patients may has less complications if they were operated with D1 radical method which can reduce risk of complication and improve the quality of life.

Objective To investigate the clinical characteristics of polymyositis/dermatomyositis (PM/DM) complicated with venous thromboembolism (VTE).Methods Medical records of patients with PM/DM at Peking Union Medical College Hospital from Jan 2000 to Oct 2014 were reviewed to identify VTE.The comparisons of various categorical clinical manifestations between groups were evaluated using t-test and x2 test.Results Twenty-three PM/DM patients developed VTE,which accounted for 1.86％ of the 1 235 PM/DM patients hospitalized during the same period.Among these 23 patients (18 female and 5 male),5 patients had PM and 18 patients had DM.With respect to the occurrence of VTE,no significant difference was found between DM and PM or between male and female.Their age was (57±7) years (range:47-71 years old),significantly older than patients without thrombosis [(47±13) years,t=-3.191,P=0.001].Twenty-one patients (75％,21/28) developed VTE in the first year after the diagnosis of PM/DM.The incidence rate ratios (IRR) for DVT in PM/DM were 1.46％ (18/1 235) and for PTE was 0.73％ (9/1 235),in which 4 cases complicated with lower extremity DVT.Most patients exhibited active disease and high levels of D-Dimer during the emergence of VTE.Conclusion Patients with PM/DM have an increased risk of VTE,especially in older patients and at the early stage after the diagnosis of PM/DM,indicating that more attention should be paid to these patients in the clinic.

0.05) in the maimed group, indignation score was high, depression score was low and self-esteem score was high ( P

Objective To evaluate the efficacy of mydriasis induced by intracameral injection of 1% lidocaine instead of topical mydriatics and postoperative recovery of pupil diameter in phacoemulsification surgery through a prospectively controlled clinical trial. Design Randomized clinical trial. Participants 34 patients (36 eyes) in study group,46 patients (50 eyes) in control group. Methods The study group comprised 34 patients (36 eyes),who were given intracamerally 0.5 ml unpreserved lidocaine 1% without using mydriatic eyedrops preoperatively. 46 patients (50 eyes),pupil dilated with topical mydriatics,Mydrin-p ( Tropicamid,Phenylephrine Eye Drops),were studied for comparison. As for the study group,baseline pupil diameters were recorded before the surgery,and 90 seconds after the injection of 1% lidocaine. As for the control group pupil,diameters were recorded when the surgery began. Pupil diameters at 1h,2h,4h,8h,12h,and 24h postoperatively were recorded respectively for both groups. Corneal edema and vision recovery were recorded postoperatively. Main outcome measures Pupil diameter. Results The mean baseline pupil size of the study group was 2.0611?0.1016mm,and maximum mean pupil size obtained at 90 seconds after the injection was 6.0972?0.1566mm. At the beginning of the surgery the mean pupil diameter of the control group was 7.6100?0.0799mm which was larger than 6.0972?0.1566mm (P=0.000). 75.0% eyes in the lidocaine group returned to normal size with brisk light reflex,while only 22.0% in the control group did. The time required for return to normal pupil size was significantly different between the two groups (P=0.000). Conclusions Intracameral injection of 1% unpreserved lidocaine can provide adequate pupil dilation and get rapid recovery of pupil size after surgery,though not as large as that of topical mydriatics for phacoemulsification. (Ophthalmol CHN ,2006,15: 205-208)

Objective To investigate the risk factors of prehypertension among postmenopausal women.Methods2 592[(43±12)years old] health women were collected as the research object in Saihan District of Hohhot in Inner Mongolia Autonomous Region in April 2015,including 697[(58±6)years old] postmenopausal subjects and 1 895[(37±8)years old] premenopausal subjects.T test was used to compare means of blood pressure, fasting blood glucose (FBG), blood lipid, and body massive index (BMI) between postmenopausal group and premenopausal group and to compare prevalence of prehypertension, hyperglycemias, dyslipidemias, overweight, and obesity between two groups.Logistic Regression was implemented to analyze the relationship between different risk factors and prehypertension among postmenopausal women.Results Compared with premenopausal women, the systolic pressure, diastolicpressure, BMI, FBG, triacylglycerol (TG), low density lipoprotein (LDL) in postmenopausal women were significantly higher(P<0.05).Prevalence of prehypertension, impaired fasting glucose (IFG), diabetes, TG abnormalities, LDL abnormalities, overweight, and obesity in postmenopausal women were significantly higher than in premenopausal women(P<0.05).Age 55 to 59, 60 to 64 and above 65 years overweight, obesity, IFG and diabetes were independent risk factors of prehypertension among postmenopausalwomen.Conclusions Age 55 yearsand above, overweight, obesity, IFG and diabetes are the independent risk factors of prehypertension among postmenopausal women.

Influences of the clock resolution of bandwidth estimator on the accuracy and stability of the packet pair algorithm was analyzed. A mathematic model has been established to reveal the relationship between the result deviation coefficient and the packet size, clock resolution and real bandwidth(value)of the measured route. A bandwidth self-adapting packet pair algorithm was presented based on the mathematic model to reduce the estimation error resulting from the clock resolution and to improve the accuracy and stability of measurement by adjusting the deviation coefficient. Experimental results have verified the validity and stability of the algorithm.