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Objective To study the effect of ultrasound-mediated microbubble on the concentration of cefuroxime in rat prostate. Methods Twenty male SD rats were randomly divided into the experimental group ( ultrasound-mediated microbubble+cefuroxime group) and the control group ( cefuroxime group) . The experimental group was given cefuroxime and microbubble via the tail vein, and then the prostates were exposed to ultrasonic irradiation for five minutes. The control group was given cefuroxime and the same amount of normal salin via the tail vein, and then given sham ultrasonic irradiation for five minutes. After the prostate was taken, cefuroxime concentration in pros-tate was measured by high performance liquid chromatograph. Results Concentration of cefuroxime in the experimental and the control group were (16. 274 ± 9. 515) μg/mg and (8. 336 ± 6. 743) μg/mg respectively. Compared to the control group, the concentration of cefuroxime was significant higher in the experimental group, and the difference is statistically significant (P <0. 05). Conclusion Low-dose ultra-sound-mediated microbubble can significantly improve the permeability of rat prostate tissue, thereby enhancing the drug concentration in prostate tissue.
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Objective To evaluate the relationship between the risk of breast cancer and abortions among nulliparous women. Methods Searched the data of Cochrane Library and PubMed before June 2014 to identify potentially studies which involved the relationship between the risk of breast cancer and abortions among nulliparous women. Data was extracted by two independent authors from each study. STATA software was used for statistical analysis. Calculated the pooled RR and 95% CI as the assessment of the link between abortions and breast cancer in fixed effects models. Results 13 studies were included. The study showed the RR and 95%CI of the relationship between the risk of breast cancer and abortions was 0. 98[0. 89,1. 08],P>0. 05 in nulliparous women, and the number of abortions was not associated with the risk of breast cancer. The RR and 95%CI of the relationship between the risk of breast cancer and induced abortions or spontaneous abor-tions were 0. 96[0. 88,1. 04],1. 01[0. 88,1. 14], respectively. Conclusion There is no correlation between breast cancer and abortions a-mong the nulliparous women, and the risk of breast cancer would not increas as the number of abortions increase.
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Evidence based medicine is based on the high quality evidence from medical journals.In this paper,the progress of evidence based medicine(EBM)and its effects on clincal practice and research are introduced,and the necessary of carrying out editorial examination and appraisal on statistical problems in medical articles is discussed.
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Photo images,as a useful visual aid,are frequently seen in medical journals.This paper discusses the importance of photo in medical papers.Problems with the photos are discussed,which includes absence of caption,the illegibility of the photos,the inferior contrasts,absence of the unusual changes,etc..Suggestions are given to improve photo effect so as to improve the quality of medical papers.