The paper focuses on the (Primary Diagnosis at Grassroots Level,PDGL),and the current pilot situation and consequence of PDGL,analyzes the problems during the progresses,and dissects the conflicts of interest among the relative stakeholders.At last,the paper provides the corresponding countermeasures to the future development of PDGL.

Aim:to study the value of clinic practice in the teaching of imageology.Methods:100 students were divided into practical group and control group.The students of practical group were divided into 5 groups to joined clinic practice of imageology.All students were examined of theory and experiment.Result:All students of practical group passed the examinations,and 80% students of control group passed the examinations.The grades of practical group excelled control group's(P

Objective: To investigate the effect and mechanism of polysaccharide of atractylodes macrocephala (PAM) on the growth of colon cancer cells in mice bearing in-situ colon cancer transplantation tumor. Methods: 1×107 colon cancer HT-29 cells labeled with luciferase were injected into colon serosa of the mice to establish the in-situ colon cancer transplantation tumor model. When the tumor volume reached 230 mm3, the mice were given 30 mg/kg PAM (PAM group) or equal volume of normal saline (Control group) by gavage for 10 consecutive days. The effect of PAM on the growth of colon cancer cells in mice was tested by in vivo tumor imaging technology. The expressions of MHCII and IL-12 in granulocytes, dendritic cells and macrophages, the activation of lymphocytes, and IFN-γ expression in CD4+ and CD8+ cells of tumor tissues were detected by Flow cytometry. Results: PAM significantly inhibited the growth of colon cancer cells in mice bearing in-situ colon cancer transplantation tumor (P<0.01). PAM activated immune cells though increasing the expression levels of MHCII and IL-12 in dendritic cells and macrophages (both P<0.01). PAM significantly increased the frequency of CD8+ cells, NK cells, CD44+/NK cells and CD44+/CD4+ cells in tumor tissues and the number of CD8+ cells and NK cells per unit volume (all P<0.01). PAM significantly increased the IFN-γ secretion of CD4+ and CD8+ cells (both P<0.01), too. Conclusion: PAM inhibits the growth of colon cancer by activating immune cells in tumor tissues of mice bearing in-situ colon cancer transplantation tumor.

Objective To investigate the effects of p38 MAPK inhibitor on glutamate (Glu), glutamine (Gln), taurine amino acid (Tau), glycine (Gly) and gamma aminobutyric acid (GABA) in hippocampus of rats with vascular dementia (VD).Methods Twenty-four healthy male SD rats were randomly divided into sham operation group, VD model group and inhibitor group. VD model was established by permanent ligation of bilateral carotid artery method, and the sham operation group stripping bilateral carotid artery but not ligation. Rats of the inhibitor group were injected p38 MAPK inhibitor SB202190 after the establishment of VD model. Morris water maze was used to evaluate the learning and memory function of rats. The samples of DG region of hippocampus were collected by microdialysis, and the contents of amino acids were detected. Results The learning and memory abilities were significantly better in sham operation group and p38 MAPK inhibitor group than those of VD model group. The latency time was significantly shorter in p38 MAPK group than that of VD model group. The time of locating the platform quadrant and the number of crossing the original platform were significantly higher in sham operation group and p38 MAPK inhibitor group than those of VD model group (P <0.05). Compared with sham group, the levels of Glu, Gln and Tau were significantly lower, and Gly and GABA were significantly higher, in VD group and p38 MAPK inhibitor group (P<0.05). Compared with VD group, Glu, Gln and Tau were significantly increased, Gly and GABA were significantly decreased in p38 MAPK inhibitor group (P<0.05). Conclusion p38 MAPK inhibitor has protective effect on VD hippocampal injury, which may be related to its ability to inhibit VD-induced abnormal secretion of amino acids and regulate the secretion of various amino acids.

This paper introduced the measures to construct the hierarchical medical system in Yichang city. The authors identified problems found and proposed the city to take the following countermeasures. Such steps included service capacity building at primary level, motivating primary medical workers, attracting patients to primary care, and improving policies of hierarchical medical system.

Hierarchical medical system empowers the current healthcare reform on the medical supply side in China, a key to resolving the contradictions in the healthcare sector. This study analyzed the necessity and obstacles for such a system with synergy between hospitals, insurance and pharmacy, putting forward suggestions for building a scientific and rational hierarchical system.

Polyurethanes are popularly used in cardiovascular and other biomedical fields due to their good biocompatibility as well as mechanical properties. But they are subject to biodegradation in vivo for a long time, and cause inflammation, so improving the biocompatibility of medical polyurethanes is an important subject of biomaterials. Recent researches have focused on biological modelling of biomaterials for improving the biocompatibility of polyurethanes. This paper reviews two main methods for improving biocompatibility of polyurethanes-endothelial cells seeding and mimic biomembrane (phospholipid surface), and summarizes the main procedures and questions of these two methods.
Biocompatible Materials ; chemistry ; Endothelial Cells ; drug effects ; Humans ; Phospholipids ; chemistry ; Polyurethanes ; chemistry

The one-step method was adopted in this study to synthesize aliphatic polyurethane with 4,4-methylene dicyclohexyl diisocyanate(HMDI), 1,4-butanediol (BDO) and poly (tetrahydrofuran) (PTMG). The tests conducted on this material were: FIR spectrum, mechanical properties test, water contact angles test, hemolysis test and platelet adhesion test. Results showed that this material has a good tensile strength up to 30 Mpa, similar to aromaphatic polyurethane. But its tensile elongation, tensile permanent change, hydrophility are better than those of aromaphatic polyurethane. The hemolysis test and platelet adhesion test showed that it has good blood compatibility.
Animals ; Biocompatible Materials ; chemical synthesis ; chemistry ; toxicity ; In Vitro Techniques ; Materials Testing ; Platelet Adhesiveness ; drug effects ; Polyurethanes ; chemical synthesis ; chemistry ; toxicity ; Rabbits ; Spectroscopy, Fourier Transform Infrared ; Surface Properties ; Tensile Strength

In this article, the blood compatibility of polyurethanes (PUs) made by ourselves for catheters is studied by hemolysis test, platelets adhesion test, kinetic thrombus time test and dynamic clot formation. The results showed that these PUs all have excellent blood compatibility. Among these PUs, H50-100 and H60-100 have best blood compatibility. Additionally, the relationship between the structure and blood compatibility is discussed.
Animals ; Biocompatible Materials ; Blood ; Blood Coagulation Tests ; Catheterization ; instrumentation ; In Vitro Techniques ; Materials Testing ; Platelet Function Tests ; Polyurethanes ; Rabbits

PEG (Mn = 1000)-segmented polyurethanes, with hard segment percentage of 40%, 50% and 55% and named PU-H40, PU-H50 and PU-H55 respectively, were synthesized by bulk polymerization. The structure of PU was characterized by FTIR, DSC, and GPC. Mechanical properties, water contact angles and water vapor transmit rate(WVTR) were also tested. FTIR and DSC showed that the degree of microphase separation increased with the hard content. Mechanical test showed the tensile strength of PU-H50 to be 25 MPa, the highest tensile strength of the PU series. By the use of PEG as soft segment, the surface hydrophilicity of the materials increased dramatically. Owing to its high degree of microphase separation and the mobility of soft segment, the water contact angle of PU-H55 attained to 33 degrees. The WVTRs of PU-H40, PU-H50 and PU-H55 were 789 g/m2/24h, 705 g/m2/24h and 623g/m2/24h respectively. These data suggest that the materials are suitable for fabricating such biomedical articles as surgical gloves, wound dressing and medical protective coating.
Biocompatible Materials ; chemical synthesis ; chemistry ; Humans ; Polyethylene Glycols ; chemistry ; Polyurethanes ; chemical synthesis ; chemistry ; Spectroscopy, Fourier Transform Infrared ; Surface Properties