The scientific research was integrated with medical statistics experiments in view of the experimental teaching practice of medical statistics.The experimental teaching system and evaluation methods of medical statistics were formed,characterized with research task-oriented,a combination of theory,practice and scientific research to guide the students to study medical statistics systematically,such as project design,collecting data,sorting data and analyzing data.The teaching method boosts the students' enthusiasm,and cultivates students' ability to solve practical problems by using statistical principles.

OBJECTIVE:Dual-wavelength spectrophotometry was developed for the determination of ciprofloxacin lactate in its eye drops.METHODS:Detection was performed at wavelength 237nm and 279nm with 0.1mol/L HCl as diluent.RESU_LTS:The assay was linear for ciprofloxacin lactate in the concentration range of 3～9?g/ml,r=0.9 998;The mean recovery was 101.6%,RSD was 2.16%.CONCLUSION:This method is simple,quick,accurate and suitable for the determination of ciprofloxacin lactate in its eye drops.

OBJECTIVE:To build up a method for determining the concentration of zaleplon in human plasma by HPLC. METHODS:The Kromasil-C 8 column was used and mobile phase consisted of methanol-water(65∶35);the flow rate was1.0ml/min,fluorescence excitation wave-length was233nm;fluorescence emission wave-length was460nm.RESULTS:The calibration curve revealed linearity in the concentration range of0.42～73.92ng/ml(r=0.9999)with a regressive equation of Y=1.870?147.The average recovery was99.47%.The with-day and between-day RSDs were4.9%and4.73%respec?tively.CONCLUSION:The method is accurate,reliable and highly sensitive so it can be used in study of pharmacokinetics of zaleplon.

In order to improve the quality of nursing dissertations,we combined the teaching of nursing research with clinical internship to teach nursing dissertation writing,following the process of program input-situation experience-clinical internship-problem study-dissertation writing.Taking problem study as the leading role,students as subject,self experience as the main access and tutors as whole-process instructors,we taught and evaluated nursing dissertations at different stages.Students'interests in scientific research,enthusiasm for participation and quality of dissertations were improved effectively.95.78％ of the students showed positive attitude to this teaching method.

Objective To study the EnCor vacuum negative pressure rotary system in ultrasonic BI-RADS 2~3 scale mammary gland disease application value.Methods Under the guidance of ultrasound, the application EnCor vacuum negative pressure rotary cutting system for 142 patients, 366 cases of breast lesion resection, specimens sent to pathological examination.Results A total of 366 breast lesions, 359 complete resection, the success rate was 98.1%, 2 transit operation, and transfer rate was 0.5%, 5 partial nephrectomy, residual rate was 1.4%.359 complete resection of the pathological results for breast malignant lesions in 4, the infiltrating ductal carcinoma 1, 3 ductal carcinoma in situ;breast benign lesions in 355, of which 132 breast fibroadenoma, adenosis with adenoma formation of 60, 99 breast adenosis, breast adenosis with duct expansion 43, 11 breast intraductal papilloma, one with four individual catheter atypical increase the living.Two transit operation pathological results were fibroadenoma, 5 disease of partial nephrectomy for adenosis with duct expansion.Conclusions The excision of breast neoplasm EnCor vacuum negative pres-sure rotary cutting system, not only small trauma, good cosmetic effect, and reduce misdiagnosis and im-prove the patients'satisfaction.

Objective　To investigate clinical features of neonatal ventilator associated pneumonia.Methods　Retrospective analysis of clinical features was performed in twenty-two newborns with ventilator associated pneumonia.Results　Ventilator associated pneumonia were found in 22 ou t of 36 neonates with mechanical ventilation.Conclusion　The incidence of VAP is significantly increased if the time of mechanical ventilation in longer than 96 hours.

Objective To investigate the distribution of T follicular helper(Tfh)cell subsets in hepa-titis B patients at different immune stages and to clarify the relationships between the level of CXCL13 and the distribution of Tfh cell subsets. Methods Flow cytometry analysis was performed to detect the distribution of Tfh cells. Enzyme-linked immunosorbent assay(ELISA)was performed to measure the levels of CXCL13 in ser-um samples collected from hepatitis B patients. RT-PCR and Western blot assay were used to analyze the expres-sion of CXCL13 in HepG2 and HepG2. 2. 1. 5 cells. Results The percentages of Tfh1 cells were significantly up-regulated at the immune activation(IA)stage,while those of Tfh2 cells were significantly raised at the im-mune tolerance(IT)stage. The percentages of Tfh17 cells in patients at the stage of IT were similar to those in patients at the stage of IA,but were higher than those in responders with HBsAg seroconversion(RP)or healthy controls(HC). The expression of CXCL13 was positively correlated with the percentage of Tfh2 cells. More over,hepatitis B virus(HBV)enhanced the expression of CXCL13 at both transcriptional and translational lev-els. Conclusion HBV might up-regulate the percentage of Tfh2 cells through promoting the expression of CXCL13,which resulted in the induction of immune tolerance. Elucidating the functions of Tfh1,Tfh2 and Tfh17 cells and understanding the type conversion mechanism among the three subsets are important for further researches on HBV-induced immunosuppression.

Objective To enhance the understanding of clinical characteristics and genetic testing of chromosome 4q21/q22 deletion syndrome. Methods Chromosomal microarray analysis was used to detect genetic change in a child with special facial appearance and development delay. Results A 15.26-Mb deletion containing 76 geinges in chromosome 4q21.21q22.2 was identiifed. Thus, this girl was diagnosed as chromosome 4q21/q22 deletion syndrome. Conclusions Chromosome 4q21/q22 deletion syndrome has varied clinical manifestations including typical characteristics (such as absolute or relative macrocephaly, megalencephaly with a characteristic head shape and facial appearance, profound hypotonia, small hands and feet, short limbs, feeding difficulties), mental retardation/severe developmental delay, and other system abnormalities ( such as congenital heart disease, seizure, kidney cysts, etc). The diagnosis of chromosome 4q21/q22 deletion syndrome relies on chromosomal microarray analysis.

Objective To investigate the effect of drug dependence severity on the relationship between impulsivity and craving.Methods 36 abstiuent drug-dependent individuals were recruited in the study.The participants were divided into the heavy depeudence group (HDG) or the low dependence group (LDG) according to the scores of Addiction Severity Index (ASI).The Barratt Impulsiveness Scale (BIS-11) and classical Stroop task were used to measure the trait impulsivity and state impulsivity.Block designed cue-induced craving paradigm was presented to measure cue-elicited craving.Results For the HDG,a significant positive correlation was found between trait impulsivity (the mean value of BIS-11-CI scale was (39.03± 16.50)) or state impulsivity (the difference of reaction time between congruent and incongruent situation was (87.77±36.95)ms)and cue-elicited craving (0.83± 1.91)(r=0.487,0.500,P＜0.05).However,for the LDG subjects,the impulsivity was not found significantly correlated with the cue-elicited craving(r=-0.261,0.081,P＞0.05).Conclusion The addiction severity influences the relationship between impulsivity and craving,and impulsivity can only be used as a predictor of relapse in HDG.The findings suggest that the drug may influence the shared brain mechanism between impulsivity and craving.