Previous studies have proved that the effect of statins in both primary and secondary prevention of ischemic stroke, however, whether acute ischemic stroke needs to be treated with statins and the effect of statins pretreatment on acute ischemic stroke remain unclear. This article reviews the recent representative studies in this field, and analyzes the effects of the application of statins in the treatment of acute ischemic stroke on prognosis.

Objective To study ultrasound features of breast cancer before and after neoadjuvant chemotherapy,and its correlation with histopathology. Methods One hundred and nine patients with breast cancer underwent paclitaxel plus carboplatin neoadjuvant chemotherapy, the change of the primary lesions and axillary lymph nodes were studied by ultrasound,and compared with histopathology. Results Seventeen patients achieved complete remission under ultrasound, the rest measurable lesions became significantly shortened in maximum diameter [ ( 22.46 ± 11.50) mm vs (34. 71 ± 13.67) mm, P ＜ 0. 001 ], and showed decrease both in longitudinal-transverse ratio (0. 80 ± 0. 23 vs 0. 86 ± 0. 22, P ＞0. 05) and grades of blood flow (0. 51 ± 0.80 vs 1.23± 1.05, P ＜0. 001 ). 44. 83% (44/92) of metastatic axillary lymph nodes disapeared after treatment. Comparing with histopathology, the sensitivity and specificity of ultrasound assessing complete remission were 57. 89 % ( 11 / 19) and 93.33 % (84/90), respectively. The moderate concord between ultrasound with histopathology might be attributed to the pathologic change of breast tissue and stroma after treatment, nevertheless grades of blood flow might be more meaningful. Conclusions Ultrasound assessment of neoadjuvant chemotherapeutic response might be of reference value,and studying corresponding ultrasonic manifestation of different kinds of pathological changes would help with better evaluation.

Objective To explore propofol dosage difference between in morning and at after-noon undergoing gynecological clinic short operation.Methods One thousands and nine hundred fifty eight female patients,aged 1 6-50 yr,of ASA physical status Ior II,undergoing gynecology clinic short operation,according to the operation time,were divided into two groups,Group morning (8:30-1 1:30,n =1047)and group afternoon (14:00-1 7:00,n =91 1).Each patient was intravenously injected fentanyl 0.01 μg/kg,and then propofol 2.5 mg/kg.When the observer’s assessment of alertness/se-dation (OAA/S)scores reached 0 score,the operation began.If the body moved,the surgery was stopped and 25 mg propofol was intravenously injected quickly.After 10 seconds observation,if the body movement existed,25 mg more propofol was performed,until the movement disappeared.Re-cord patients’year,height,weight,body mass index,and the heart beat,blood pressure of pre-op-eration,the number of times of cervix uteri expansion per vagina,the history of labor per vagina,the total dosage of propofol and the time length of sedation.Results The dosage of group afternoon (1 52.1 6±65.90)mg was higher than group morning’s (135.69±37.67)mg (P <0.05).There was no significant difference of time lengths of sedation between the two groups.Additional use of propofol in the afternoon group 387 (42.5%)was higher than group morning’s 1 99 (23.5%)(P <0.05).Conclusion In gynecological clinic short operation,the propofol dosage in afternoon was higher than that in the morning group.But the sedation time length in afternoon was not longer than that in the morning.

Objective To evaluate the safety and clinical effect of homemad Costant coronary stent implantation.Methods The immediate and two-year follow-up results of Costant coronary stent implantation in severe coronary heart disease(CHD)patients were retrospectively analyzedin the General Hospital of Shenyang Command of PLA and the Guanzhou People's Hospital from Mar.2001 to Aug.2003.Results Implantation of 86 homemad Costant coronary stents was successfully performed in 71 severe CHD patients although 3 main adverse cardiac events(MACE)occurred during hospitalization(2 patients died and 1 patient had sub-acute in-stent thrombosis).Follow-up was made in 63 patients for(21.5?4.4)months on an average and 4 patients died.Repeat coronary angiogram in 21 patients showed that in-stent restenosis for Costant stent existed in 4 patients and in-stent restenosis in other types of stent was found in 3 patients and in-stent restenosis in all stents was found in 1 patient who died of shock and neo-coronary lesions was found in 5 patients.Costant stent restenosis rate was 7.9%(5/63);MACE rate was only 12.7%(8/63)during follow-up.Conclusion Homemad Costant coronary stent can be safely implanted in severe CHD patients with ideal long-term outcomes.

Objective To establish a method for determination of 7 preservatives, benzyl alechol, sorbic acid, benzoic acid, methyl-paraben, ethyl-paraben, propyl-paraben, butyl-paraben, in cosmetics in one time by gas chromatography. Methods The cosmetic sample was dissolved by methanol, extracted by ultrasonic and separated by packed column of DB1, the optimized experimental condition was explored also. Results The concentrations of 7 preservatives showed a positive correlation with the peak heights at the following ranges, 100-500 ?g/ml for benzyl alechol, 200-600 ?g/ml for sorbic acid, 25-500 ?g/ml for benzoic acid, methyl-paraben, ethyl-paraben, propyl-paraben and butyl-paraben, the correlative coefficients were 0.998 3-0.999 9. The detection limits were 5.5, 57.1, 29.6, 6.2, 5.5, 6.2, 6.2 ng/ml respectively. The recovery rates were 91.6%-102.7%. RSDs were 2.2%-10.2%. Conclusion The present method can perfectly separate the seven preservatives in cosmetics mentioned above with some advantages, such as simple, accurate, sensitive and quick.

Objective To investigarte the immune status in the patients with dengue fever .Methods The flow cytometry was used to detect the T lymphocytes in the patients with dengue fever for analyzing their immune status .Results Compared with the reference range in the healthy individuals ,it was found that the T lymphocyte proportion in the patients with dengue fever was sig‐nificantly reduced compared with the healthy individuals .The percentages of CD3+CD4+ and CD3+CD8+ lymphocytes were (36 .54 ± 9 .78)% and (17 .7 ± 10 .01)% respectively ,which had statistical difference compared with the control group(P<0 .05) ,CD3+CD4+ lymphocyte count was (49 .98 ± 240 .2)cells/μL ,the difference was statistically significant (P<0 .05) ,CD3+ CD8+ lympho‐cytes count was (380 .9 ± 364 .6)cells/μL ,the difference was statistically significant(P<0 .05) .Conclusion The immune status in the patients with dengue fever is abnormal ,T lymphocyte percentage is significantly reduced compared with the healthy individuals .

The health workforce plays an important role in the development of township hospitals. It builds up the comprehensive evaluation index system as the first time, based on data of township hospitals from 29 provinces, to evaluate the allocation of the health workforce in primary medical institutions in rural China. The empirical results show that the core workforce allocation of Chinese township hospitals has largely focused on the local health status, which shows good fairness of allocation. Meanwhile, the equity level of the core workforce allocation is not far behind the overall fairness level, and both are slightly higher than the critical value. The core workforce allocation is in good consistency with the local level of economic development.

BACKGROUND: There are currently few studies regarding the pharmacokinetics of vancomycin via intravitreous injection.OBJECTIVE: To determine the concentration of vancomycin injected into the vitreous chamber of conscious rabbits.METHODS: A microdialysis probe was implanted into vitreous chamber of normal rabbit eyes and rabbit eyes infected withbacterial endophthalmitis for 24 hours, and 10 g/L vancomycin 0.1 mL was administered intravitreally. The drug concentration inthe vitreous chamber of rabbit eyes was determined at 0.5, 1, 2, 4, 6, 12, 24, 48, 72 and 84 hours after injection, through themicrodialysis and high performance liquid chromatogram-ultraviolet detection.RESULTS AND CONCLUSION: The metabolism of vancomycin showed an open two-compartment model in normal rabbit eyes.Its half-life was 51.66 hours and the peak concentration was 695.92 mg/L. The metabolism of vancomycin in the infected vitreouschamber showed a one-compartment model. Its half-life was 11.91 hours and the peak concentration was 713.35 mg/L. All rabbitswere injected with drugs for 84 hours and the intravitreous concentration of vancomycin was higher than minimal inhibitoryconcentration. The experimental findings indicate that microdialysis coupled to high performance liquid chromatography is apowerful tool to investigate the ocular pharmacokinetics of vancomycin, and the samples are harvested in a real-time, continuousand dynamic fashion when the experimental animals are conscious.

Objective To retrospectively study the value of ultrasonography in diagnosing breast lymphoma and compare with mammography and MRI. Methods Imaging characteristics of 26 patients who were pathologically comfirmed as breast lymphoma were reviewed, including ultrasonography,mammography and MRI, and compare the diagnostic accuracy among the three. Results Twenty-four patients underwent ultrasonography and 32 lesions were found, with longest diameters averaged 30 mm.Tumors were mostly hypoechoic or very hypoechoic (81.3％), some were lobular (25.0％) or oval (21.9 ％ ) in shape, the margins were most frequently circumcribed (62. 5 ％ ), and a few tumors showed an echogenic boundary (18.8 ％ ). Color Doppler imaging showed hypervascularity in most tumors (59.4 ％ ).Ninteen patients undewent mammography, 15 solitary lesions were identified in 12 patients, asymmetric density in five,punctate calcification in one,and no abnormality in one. Eleven lesions were identified in MRI of 10 patients, 10 lesions showed hypointensity on T1-weighted images and hyperintensity on T2-weighted images, and heterogeneous enhancement after contrast. The diagnostic accuracy of ultrasonography,mammography and MRI was 83％, 52％ and 100％, respectively. Conclusions The sonograms of breast lymphoma have some distinct features, the combination of ultrasonography and MRI might benefit the diagnosis of breast lymphoma.