This article describes the introduction of concept of evidence-based medicine in gynecology and obstetrics education. We will use the problem-based education mode to improve the quality of gynecology and obstetrics education to bring up the students'habits of active learning,enhance their abilities of clinical thinking and promote their innovative consciousness.

Bone marrow scintigraphy is a technology which is used in bone marrow mononuclear phagocytes may swallow colloidal imaging agent which is injected by intravenous, and the red bone marrow hematopoietic cells are consistent with mononuclear phagocytes. So it can indirectly observe the red bone marrow distribution. This technology can overcome disadvantage of the traditional biopsy which can only be partially drawn and can provide functional body imaging of bone marrow, simple and noninvasive. So it is used widely in the treatment of disease in the blood disease.

BACKGROUND:Drug-eluting stents have achieved better treatment outcomes, but late stent thrombosis shakes its status. With the development of drug-eluting stents, loaded drugs are the key to reduce stent thrombosis. OBJECTIVE:To analyze the screening and application of drug-eluting stents. METHODS:A computer-based search was performed for literatures published from 2010 to 2016 in databases of PubMed and WanFang using the keywords of“drug eluting stents;rapamycin (sirolimus);paclitaxel;heparin;zotarolimus;everolimus”in English and Chinese, respectively. According to inclusion and exclusion criteria, 30 eligible literatures were included for analysis. RESULTS AND CONCLUISON:An ideal drug-eluting stent can selectively inhibit vascular smooth muscle and is expected to be anti-coagulated, but makes no effects on vascular endothelial cel s or promoting the cel proliferation. Most of the loaded drugs are antithrombotic and anti-proliferative drugs, among which, rapamycin-eluting and paclitaxel-eluting stents are extensively used. Regardless of delaying the proliferation of vascular endothelial cel s and increasing the thrombosis risk, most of drug-eluting stents are stil loaded with these two drugs, and only few stents loaded with rapamycin derivatives, such as everolimus, zotarolimus, tacrolimus and pimecrolimus. Current research focuses on developing a stent with rapid drug releasing and anti-proliferative capacity. Meanwhile, the combination of drugs and biphasic releasing are another novel idea.

OBJECTIVE:To provide reference for improving classification management and specifying standards of retail phar-macies in China. METHODS:The implementation status and standards of retail pharmacies'classification management in China were analyzed by using the method of comparative analysis. In view of the effects of classification management on retail pharmacy and its implementation difficulties,corresponding improvement measures were put forward. RESULTS & CONCLUSIONS:There are difference in the implementation status and standards of retail pharmacies'classification management in the national provinces and cities. Since the implementation of pilot in 2007,the main effects include retail pharmacies facing the survival of the fittest whipsaws pattern,the remote township small retail pharmacies facing a transition;the main implementation difficulties include gov-ernment failing to give a full propoganda the classification management of retail pharmacies,the construction of licensed pharma-cist team to be strengthened. It is suggested to include the ability of pharmaceutical care and credit level into the standard,imple-ment dynamic management,and complement classification management of retail pharmacies with the construction of licensed phar-macist team.

Proteolysis-targeting chimera (PROTAC), as an emerging treatment method, has become one of the hottest technologies in the field of new drug research with a near-20-year development. PROTAC utilizes the natural ubiquitin-protease system in cells to induce targeted protein degradation, especially for protein of interest that are difficult to target by traditional small molecules. Moreover, PROTAC is expected to solve the problem of drug resistance that often occurs with small molecule drugs. However, the excessive relative molecular weight, poor solubility and membrane permeability, and low oral absorption of PROTAC make it challenging to druggability study. Currently, take pharmacokinetic characteristics as the entry point to continuously optimize and improve, so as to accelerate the transformation of PROTAC from laboratory to clinical application. Based on the basic structure and mechanism of PROTACs, this review introduces its pharmacokinetic properties, analyzes how to design efficient and stable PROTAC molecules, summarizes its current research progress in various diseases treatments, evaluates the development prospects and limitations of PROTAC, in order to provide more references for further research and application of PROTAC.

Objective To investigate the clinical feature of Acinetobacter baumannii and to provide the basis for clinical rational use of anti-microbial agents.Methods ATB system was used to identify Acinetobacter baumanii, and antimicrobial resistance was determined by Kirby-Bauer method.The results were analyzed by Whonet 5.4 soft-ware.Results A total of the 358 strains Acinetobacter baumannii were isolated,91.62% were from sputum and throat swab.The main departments was ICU(52.23%);In 358 strains Acinetobacter baumannii,217 strains were multi-drug resistant strains(60.61%).The drug resistance to polymyxin B was the lowest 0% followed by minocy-cline 19.8% and cefoperazone/sulbactam 9.8%, the next was netilmicin 21.1% and meropenem 41.5%. Conclusion Acinetobacter baumannii shows multi-drug resistance, especially in ICU.Anti-microbial agents should be the rational use according to the results of drug susceptibility in order to reduce and control the incidence of noso-comial infections.

OBJECTIVE To discuss etiological factors and control strategies of hospital infection,in order to reduce the occurrence of hospital infection in the outpatient department of stomatology.METHODS According to the etiological factors of the hospital infection in outpatient department of stomatology,the corresponding control measures were presented.RESULTS The occurrence of hospital infection could be cut down by steps such as establishing the perfect rules and regulations,executing technical operation rules strictly,strengthening knowledge training for the medical staff,occupational protection,environmental disinfection management of outpatient department of stomatology,equipment disinfection management,hand hygiene of medical staff and standardizing the classification of the collection of clinical waste.CONCLUSIONS Occurrence of hospital infection has been effectively cut down by management measures of hospital infection taken in the outpatient department of stomatology.

Objective To study the effect of brain‐derived neurotrophic factor (BDNF) in the process of adenosine triphos‐phate (ATP) activating BV2 microglia .Methods BV2 microglia was cultured by adding different concentrations of ATP .Then the expression level of intracellular CD11b and BDNF and the secretion level of TNF‐α in the supernatant were quantitatively deter‐mined by Western blot .BV2 microglia was treated by different concentrations of BDNF scavenger tyrosine kinase receptors B (TrkB)/Fc and incubated by ATP .The expression level of intracellular CD11b and BDNF and the secretion level of TNF‐αin the supernatant were measured .Finally adding exogenous recombinant BDNF into cultured BV 2 microglia ,intracellular changes of CD11b and supernatant TNF‐αlevels were detected .Results After adding ATP for cultivating BV2 microglia ,intracellular CD11b and BDNF expression levels and supernatant TNF‐αlevel were increased with a dose‐and time‐dependent manner in some ranges . After adding TrkB/Fc ,the levels of intracellular CD11b and BDNF expression and supernatant TNF‐αlevel were decreased with a dose‐and time‐dependent manner in some range .CD11b and BDNF expression levels was decreased in a dose‐and time‐dependent manner .Adding exogenous BDNF ,the levels of intracellular CD11b and BDNF expression and supernatant TNF‐α level were in‐creased again .Conclusion Intracellular BDNF expression is increased when BV2 microglia is activated and replenishing exogenous BDNF can activate microglia .Therefore BDNF may play an important role in the microglia activation process .

Objective To explore the feasibility,efficent and safety of transuretheral enucleation of prostate combined with extraction of gland pieces from small lower mid-line incision(LMI).Methods One hundred and twelve patients with large benign prostatic hyperplasia were treated by modified transurethral nucleation of prostate,during the operation,the gland was divided into 2-3 parts which were extracted from a small LMI.Results In this method the operation time was 60-120 min with an average time of(70 ± 10)min and blood loss during operation was 60-400 ml with an average of(150 ± 15)ml.There was no severe complication during and after operation.At the 3 month after surgery,the urine flow rate(Qmax)increased from (7.5 ±2.4)ml/s to(16.0 ±2.5)ml/s,and urine residual volume(RUV)decreased from(75 ± 15)ml to (25 ± 10)ml,international prostate symptom score(IPSS)decreased from 25.5±:4.5 to 8.4 ± 1.3,and the quality of life(QOL)decreased from 5.5 ± 0.4 to 1.2 ± 0.3.All these changes were statistically significant (t =28.53,36.19,37.16 and 59.53,Ps ＜ 0.05).At the 6 month,no complications,e.g.,permenant uroclepsia,urethrostenosis or erection disfounction occurred.Conclusion Transurethral enucleation of prostate combined with gland extraction from LMI for large benign prostatic hyperplasia is safe and effective and it is worthy of generalization in clinical practice.

As an important inflammatory cytokine, tumor necrosis factor-α (TNT-α) plays an important role in the process of cerebral ischemia-reperfusion. The discussion of the dynamic changes, the mechanism of neurotoxicity and antagonizing the therapeutic effect of TNF-α in the process of cerebral ischemia-reperfusion injury will provide theoretical basis for the treatment of cerebrovascular diseases.