With the advance of modern imaging technologies,many examinations,especially for ultrasound,have been used for the screening examination of breast cancers.This article reviewed the character and prospect of ultrasound for breast cancers.

Objective To probe into the application quality and performance test of PET/CT.Methods Radionuclide 18F was used to detect PET including its spatial resolution,sensitivity,scatter fraction,count losses and image quality.American Catphan-424,ionization chamber of Sweden Barracuda and radial measuring apparatus were used to perform CT test including CTDI,scan localization light accuracy,slice width,spatial resolution,density resolution,field uniformity and noise,CT value linearity and contrast scale,table movement accuracy.Results PET/CT was qualified as the whole,but part of parameters were beyond the limits.Conclusion The performance test can efficiently ensure the quality and safety of PET/CT system.

OBJECTIVE To construct two-hybrid genomic library of Rhodococcus equi,and study the pathogenic mechanism of R.equi.METHODS The genomic DNA of R.equi was partially digested and cloned into AD vector of two-hybrid system,the number of independent clone and the size of insert fragment were detected as the quality index of the library.RESULTS The independent clone of the library was 1?106 and the average size of insert fragment was 2.3 kb.CONCLUSIONS The pathogenic mechanism of R.equi is not clear and it is very important for this study to construct two-hybrid genomic library.

Objective To investigate the clinical effect of pegylated interferon(IFN)on chronic hepatitis C and its effect on cellular immune function.Methods A total of 92 patients with chronic hepatitis C were enrolled in our hospital from June 2013 to October 2016.They were randomly divided into study group and control group by single and double numbers(admission order),with 46 cases in each group.The control group was treated with recombinant human interferon alpha-2b on the basis of conventional treatment.The study group was treated with pegylated interferon alpha-2a on the basis of conventional treatment.Results After treatment, the rates of RVR, EVR, ETVR and SVR in the study group(52.17%, 71.74%, 76.09% and 54.35%, respectively)were significantly higher than those in the control group(34.78%, 50%, 58.70%, 39.13%, respectively), The difference was statistically significant(P<0.05).There were no significant difference in the cellular immune function index between the two groups before treatment;After treatment,the CD3+, CD4+, CD4+/CD8+ and other immune function indexes of the study group were significantly higher than those before treatment, while the results of CD8+ were significantly lower than before treatment(P<0.05);There was no significant difference in the cellular immune function in the control group compared with before, and the difference of the cellular immune function between the 2 groups after treatment was statistically significant(P<0.05).Conclusion Pegylated interferon(IFN)on the basis of routine treatment can improve the virologic response and cellular immune function in patients with chronic hepatitis C.

Objective Retrospective analysis of 56 cases of the surgical humerus neck of children that treated with abduction brace combined with manipulative reduction,and discuss the significance of abduction brace combined with manipulative reduction in treatment of fracture of the surgical humerus neck about children.Methods This study consisted of 56 children with fracture of the surgical humerus neck,among these,41 were males and 15 were females,9 were road accident and 47 were falling injury,average 7.67 years.They were all treated with abduction brace combined with manipulative reduction,after 1 month fixation,dismantled the abduction brace and did the functional exercise.Results Follow-up study was carried out in 56 cases,followed 6 months to 5 years,average 2.96 years,accoding to the standard of fracture healing,excellent result was obtained in 35 cases and good in 21 cases,the excellent-good rate was 100%.Conclusions Abduction brace combined with manipulative reduction is an effective treatment for fracture of the surgical humerus neck in children.

Objective To observe the effect of ambroxol hydrochloride combined with intervention in chronic obstructive pulmonary disease and evaluate its clinical effect. Methods A total of 88 patients with chronic obstructive pulmonary disease (COPD) who were treated in Changxing Hospital of Zhejiang Province from March 2014 to April 2017 were randomly divided into study group and control group. The control group was treated with ambroxol, and the study group was given comprehensive nursing intervention on the basis of control group. The clinical treatment of the two groups was observed.Results After treatment, the total effective rate of the treatment group was 95.45％ (42/44), the control group was 77.27％(34/44), the difference was statistically significant (P<0.05); there were no significant differences in blood gas analysis (PaO2, PEF) and lung function (MVV, Fres, Zrs, R5-R20, Cdyn) before treatment, after treatment, the improvement of the indicators in the study group was significantly better than the reference group (P<0.05). Conclusion Ambroxol combined with comprehensive nursing intervention for chronic obstructive pulmonary disease, can effectively improve the clinical treatment effect, help to improve lung function, promote the recovery of the disease, with clinical application value.

Objective To evaluate the effect of early surgical treatment for primary lower limb varicose veins complicated by thrombophlebitis.Methods The clinical date of 42 patients with primary lower extremity varicose veins complicated by thrombophlebitis treated in 4 years were analyzed retrospectively.The CEAP classification was adopted to establish the diagnoses of the all patieats.In the early stage,high ligation and stripping of the varicase veins were performed.After removal of varicose veins and thrombi,both anti-inflammation therapy and anticoagulant therapy were applied.Results All patients made a good recovery.After surgery,3 patients had skin callous and swelling,and 3 patients had foot nerve paresthesia.But,no serious complications,such as deep venous thrombosis or pulmonary embolism,were observed.The was no recurrence during 2 months to 4 years follow-up.Conclusions Early surgical treatment for primary lower limb varicose veins complicated by superficial thrombophlebitis not only has good results but also helps control of deep venous thrombosis and pulmonary embolism,and other serious complications that can result from superficial venous thrombosis.

Objective To explore the feelings of the caregivers of dementia patients,and find the resource of the caregiver's abuse tendency to dementia patients in community.Methods The data of 10 caregivers were collected through deep interviews,and the Colaizzi analysis method was used to analyze the data.Results Through repeatedly reading,arranging,analysis,separation,and theme refining,five themes were drawn:lack of related knowledge and care skills,care tasks making caregivers tired,the economic burden,lack of social support,low sense of worth.Conclusions When concerning the problems caused by dementia patients,it's necessary to appeal the society and government to provide feasible service and assistance on the issue of abuse tendency,which is produced by the caregivers during the process of taking care of them.

Objective To observe the effect of penehyclidine hydrochloride (PHCD) combined with mechanical ventilation on inflammatory response in rats with acute respiratory distress syndrome(ARDS)induced by hydrochloric acid(HCl)inhalation. Methods 32 adult healthy male Sprague-Dawley(SD)rats were randomly divided into four groups:sham operation group,ARDS model group,PHCD group(intraperitoneal injection of 0.5 mg/kg PHCD at 30 minutes before HCl instillation)and mechanical ventilation group〔mechanical ventilation was given after PHCD treatment,ventilator settings were as follows:tidal volume(VT)=4 mL/kg,respiratory rate(RR)= 70 beats/min,the time ratio of inspiration to expiration(I:E)=1:2,fraction of inspired oxygen concentration(FiO2)=0.21〕,8 rats in each group. The rat ARDS model was created by HCl(0.1 mol/L,1.2 mL/kg) intratracheal instillation. After mechanical ventilation for 4 hours,the experiment was stopped. Arterial partial pressure of oxygen(PaO2)was measured,and the oxygenation index as well as lung wet/dry weight ratio(W/D)were calculated respectively. The pathological changes in lung tissues were observed under light microscope,and the pathological score was evaluated. The levels of myeloperoxidase(MPO),interlukin-8(IL-8)and nuclear factor-κB (NF-κB)in homogenate of lung tissues were all measured respectively by enzyme linked immunosorbent assay (ELISA). Results In rats of ARDS model group, there were significant infiltration of inflammatory cells, collapse of extensive pulmonary alveoli and hyaline membrane formation in lung tissues,but the edema in pulmonary mesenchymal tissue and congestion of micro vessels were not obvious. Compared with sham operation group,the lung tissue pathological score(9.88±2.03 vs. 1.38±0.92),lung W/D ratio(7.67±0.96 vs. 4.08±0.65)were significantly increased(both P<0.01),while oxygenation index〔mmHg(1 mmHg=0.133 kPa):213±29 vs. 428±28〕was markedly decreased in model group(P<0.01);and the concentrations of MPO(μg/L:34.18±3.99 vs. 20.92±1.40), IL-8(ng/L:864±53 vs. 583±91)and NF-κB(ng/L:1 229±133 vs. 803±130)in homogenate of lung tissues were significantly higher in model group(all P<0.01). The pathological changes in lung tissues including inflammatory cell infiltration,collapse of alveoli and pulmonary edema,etc. were obviously improved when treated by PHCD or mechanical ventilation and the lung pathological score and W/D ratio were significantly decreased compared with those of model group,oxygenation index in these two groups were both significantly increased,meanwhile, the concentrations of MPO,IL-8 and NF-κB were sharply decreased when compared with those of model group (all P<0.05). The degree of improvement in all above indexes were greater in mechanical ventilation group than those in PHCD group(lung injury score:5.63±1.85 vs. 7.63±1.67,lung W/D ratio:5.35±1.05 vs. 6.46±1.17, oxygenation index:325±57 vs. 272±44,MPO:25.80±3.36 vs. 29.88±3.93,IL-8:736±53 vs. 802±53, NF-κB:984±75 vs. 1 109±118,all P<0.05),however they did not reach the levels of the sham operation group (P<0.05 or P<0.01). Conclusion PHCD can inhibit the inflammatory response in ARDS rats induced by HCl inhalation,thus it may protect the lung tissue from injury induced by HCl,and the protective role of PHCD plus menchanical ventilation is superior to that of PHCD only.