ObjectiveTo aim at the deficiencies of existing assessment methods,and put forward ideas,methods and contents to reform experimental course assessment methods for undergraduates.MethodsAll of the fifth-grade preventive medicine undergraduates were divided into experimental group (n=34) and control group(n=31),reformed and conventional assessment methods were used in experimental group and control group respectively.The difference in attendance,experimental skill and reports were compared between two groups.ResultsAttendance,test scores and experimental skill scores of students in experimental group were significantly higher than that in control group and compared with the control group students (P＜0,05),the experimental group students' understanding on the experimental principle,phenomena and data analysis were better.ConclusionReformed assessment methods of experimental course has an improved effect on teaching for undergraduates.

Objective To observe the effect and mechanism of nasal continuous positive airway pressure(nCPAP)in the treatment of obstructive sleep apnea/hypopnea syndrome(OSAHS)with coronary heart disease.Methods 126 OSAHS patients with coronary heart disease were randomly divided into two groups.The treatment group was treated by nCPAP on the basis of former medicine but the control group was treated by former methods.Three months later,polysomnography(PSG)and the holter ECG examination were conducted.Results After three months,the nocturnal myocardial ischemia episodes decreased significantly in both groups(55.6%and 6.35%,P＜0.01).Conclusion nCPAP may abolish sleep apnea and hypopnea,correct hypoxemia,reduce the nocturnal mean heart rate and systolic blood pressure,and improve myocardial ischemia episodes,so to reduce the incidence of cardiac end-point events.

Obiective To study the regularity of three-dimensional displacement in respiration of lung cancer. Methods Af-ter CT scanning, the CT images were transferred into target planning system (TPS) to obtain three-dimensional reconstruc-tion images. Then target drawing and noting of target position, tumor volume, lung function, patient gender, age and weight were performed. The images during the course of inspiration and expiration in simulator were scanned and transferred into TPS by DICOM RT port. At last, the three-dimensional displacement curve of the interested points(X,Y and Z axis) could be obtained. Results The three-dimensional real time displacement curve of lung cancer interested points could be estab-fished by the way of collecting simulator images and drawing interested points. The maximum displacement range of the interested points were 4.2mm in Z-axis(head-foot direction), 3.8ram in X-axis(left-right direction), 2.9ram in Y-axis(ante-rior-posterior direction). Conclusion The three--dimensional real time displacement curve of lung cancer at any point of the target can be established by collecting the dynamic images in simulator and reconstructing of the corresponding images in target planning system through the DICOM RT.

Bladder cancer is a common malignant tumor in urinary system. The life quality of patients reduces obviously after radical resection of bladder. Comprehensive treatment including radiotherapy and chem-otherapy after bladder preservation surgery plays an important role for the prevention of postoperative recur-rence,preservation the function of bladder,and improving the life quality of patients. Image-guided radiothera-py can reduce the setup error and inner boundary caused by the movement of organs,and can alleviate the side reaction of radiation,and it also can provide basis of expanding boundary of planning target volume for the blad-der cancer patients.

0.05). Conclusions In human liver microsome system in vitro,CYP1A2,2B6 and CYP2A6 contribute to the metabolism of 629.It is very important for bioreduction drugs design and development,and provide the basic experimental and theoretical profiles for extensive application in clinic.

Objective:To detect the engraftment capability and hematopoietic potential of the expanded cells,establish an optimized project of ex vivo expansion and the SCID mice model of UCB transplantation.Methods:Human cord blood CD34 + cells were clutured in strom free liquid culture system,the sublethally irradiated SCID mice were injected with human expanded cord blood cells by tail vein.Four weeks after inocuration,BM cells of the survived animals are obtained from both femurs and tibias and assessed for the presence of human cells by immunofluorescence staining and PCR.Results:The cells and CFUs of group FL+TPO+SCF+IL 6 were increased significantly,and maintained some proportional CD34 + cells.The CFU of group SCF+IL 6+IL 3+GM CSF+EPO had reduced in week 2,CFC and CD34 + cells and Alu gene were detected in SCID mice BM.Conclusion:The cytokine combination with FL+TPO+SCF+IL 6 can effectively expand UCB CD34 + cells,and the expanded cells can engraft the BM of sublethally irradiated SCID mice and reconstitute hematopoiesis.

Objective To compare the dosage characteristics between three-dimensional conformal radiotherapy (3DCRT)plan and simplified inverse dynamic intensity modulated radiotherapy (IMRT)in patients with early-stage breast cancer after breast-conserving surgery.Methods 3DCRT and IMRT treament plans were designed for 14 female patients with early-stage breast cancer after breast-conserving surgery,4 of whom were left breast cancer cases.A dose of 50 Gy in 25 fractions to the whole ipsilateral breast was delivered using 6 MV photons for 3DCRT or IMRT.For 3DCRT plans,tangential field irradiation was adopted.While for IMRT,reverse dynamic intensity modulated technology was done through two pairs of tangential-likely fields, and 10 Gy was boosted to the tumor bed concomitantly in 25 fractions.The conformity index (CI),heterogenei-ty index (HI),dose and volume of organs at risk were evaluated by dose volume histograms (DVH).Results Compared with 3DCRT plans for ipsilateral lung,the high dose volumes were reduced and the low dose volumes were increased in IMRT plans.The same phenomenon was also observed for the heart of the patient with left breast cancer.The crosspoint doses of 3DCRT DVH and IMRT DVH for lung or heart were (25.16 ±9.11) Gy,(28.63 ±10.41 )Gy respectively.There was no difference between the two plans in the V10 of contra-lateral breast [IMRT(4.13 ±5.17)%∶3DCRT(1.99 ±2.43)%,t=2.11,P>0.05],but the D30 and mean of IMRT plan were higher than that of 3DCRT [(2.23 ±1.77)Gy ∶(1.20 ±0.46)Gy,t=2.58,P<0.05;(2.35 ±1.59)Gy ∶(1.54 ±0.88)Gy,t=3.15,P<0.01].The difference in HI between the two plans was not observed [IMRT(1.25 ±0.10)∶3DCRT(1.23 ±0.11),t=1.25,P>0.05].While the CI of IMRT plans were improved compared with 3DCRT [(0.75 ±0.07)∶(0.62 ±0.09),t =5.68,P<0.000 1]. Conclusion Compared with 3DCRT plan in patients with early-stage breast cancer after breast-conserving surgery,the main advantages of four fields simplified inverse dynamic IMRT are concomitant tumor boosting, decreasing the high dose volumes of ipsilateral lung,and improving the CI of planning target volume at the same time,but the HI is not improved.The IMRT plan is a simple,rational and feasible design scheme.

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Aim To make ethanol from bistortae(EFB)from traditional Chinese medicine bistortae,and investigate the protection on the injury of the human umbiliar vein endothelial cell(ECV304)induced by hydrogen peroxide(H2O2).Methods ECV304 cells were cultured and divided by five experimental groups including normal,injury model induced by H2O2 and three pretreated groups with EFB;flow cytometry(FCM)methods Annexin V/PI staining and PI staining were used to analyze the effect of the medicine on the apoptosis and cell cycle;reverse transcription PCR(RT-PCR)was used to detect the mRNA expression level of apoptosis associated protein caspase-3 in all experiment-al groups.Results FCM Annexin V/PI staining result showed early and advanced stage apoptosis rate was lower when predisposed than that of the damaged group,FCM PI staining showed there were more cells in G0/G1 stage in oxidation damage group,but less in S stage,and hypodiploid peak could be observed,RT-PCR showed that the expression of caspase-3 was weakened when predisposed by EFB than without this disposal(P

Based on the current situation and the application situation of Intranet and Internet technologies of Gansu Provincial Maternity and Child-care Hospital,the paper takes advantage of interconnection and interworking technologies of Intranet and Internet,constructs the day parting appointment registration and examination system in a variety of ways,introduces the overall design,deployment and implementation of the system,and summarizes the application experience.This system saves greatly the time for the queuing of patients,relieves the pressure of waiting for treatment,and improves the visiting experience of patients.