The standardized resident training is an important and necessary way to cultivate high-quality medical talents.The goals between clinical and imaging residents in standardized training of ultrasound department are different.For clinical residents,the purpose is to understand the ultrasound images of various common diseases,combine clinical manifestation with ultrasound images,and improve the level of clinical diagnosis and treatment.For imaging residents,the goal is much higher and stricter;they need to master solid ultrasonic knowledge,independent operational and diagnostic ability,in order to provide reliable and accurate ultrasonic diagnosis.We individually design the teaching plan and methods in ultrasound department,in order to improve teaching efficiency and quality.

Objective To explore the effect of single and multiple course dexamethasone on brain development in preterm infants.Met-hods One hundred and eighteen preterm infants delivered after 28-34 weeks′ gestation from Aug.2005 to Mar.2007 in our NICU were enrolled in this study.These infants were divided into 3 groups by antenatalcourses of dexamethasone: control group,single-course group and multi-course group.Supportive treatments were given to all 3 groups.Neonatal behavioral neurological assessment(NBNA) was conducted on expected date of delivery.Mental and psychomotor developmental index was evaluated at 3,6,12 months by using intellectual development table made at Children′s Development Center of China(CDCC).Results The score of NBNA was much higher in single-course group than that in multi-course group and control group(Pa

Objective To observe the effects of butylphthalide on the expression of autophagy-related protein and mRNA in l-meth-yl-4-phenyl-pyridiniumion (MPP+)-induced SH-SY5Y cells, and to explore the protective effect and possible mechanism of butylphthalide to the cell model of Parkinson's disease. Methods The SH-SY5Y cells were divided into control group (A), MPP+group (B), rapamycin pre-treated+MPP+group (C) and Butylphthalide pretreated+MPP+group (D). The relative viability of SH-SY5Y cells induced by MPP+was measured with MTT assay, the morphology of SH-SY5Y cells was observed. The expression of microtubule associated protein 1 light chain 3 (LC3)-II/I and Beclin 1 protein was detected by Western blotting. And the expression of LC3-II/I and Beclin 1 mRNA were assayed by re-al-time quantitative reverse transcription-PCR (RT-PCR). Results The viability rates of cells were significantly lower in group B than in group A (t=20.270, P<0.001), and were significantly higher in groups C and D than in group B (t>8.770, P<0.001), however, there was no significantly difference between groups C and D (t=2.270, P=0.064). The expression of LC3-II/I and Beclin 1 was higher in group B than in group A (t>6.647, P<0.01), and was higher in groups C and D than in group B (t>3.630, P<0.01), however, there was no significantly differ-ence between groups C and D (t<2.238, P≥0.05). Conclusion Butylphthalide could prevent the injury of SH-SY5Y cells induced by MPP+, which may affect Parkinson's disease by inducing autophagy.

[Objective]This study was designed to explore the dynamic changes of cytokines in the local tissues of radiationinduced oral mucositis in a rat model.[methods]The rat oral mucosal tissues were obtained at 5 d,8 d,and 14 d after irradiation.which were received single X-ray irradiation of 30 Gy locally.RayBio~((R)) Rat Cytokine Array was applied to analyze the 19 cytokines.The mRNA levels of the 8 inflammatory-related cytokines were analyzed by real time-PCR.ELISA was employed to detect IL-1α,IFN-γ,and TIMP-1 protein levels.[Results]Cytokine array detection showed that cytokines such as Frac,IL-4,IL-6,IL-10,and TNF-α were down-regulated after irradiation.IL-1β,LIX,VEGF,and β-NGF were no obviously changed at the same time corse.The elevate range less than 2 fold of the CINC-2,GM-CGF,Leptin,MCP-1,and MIP-3α after irradiation were detected.The increasing range more than 2 fold of CINC-3,INF-γ,IL-1α,and TIMP-1 post irradiation were detected.The mRNA levels of anti-apoptosis,such as Bcl-2,and TNF-α,IL-6,VEGF,and IL-1β were low down,while the levels of promoting apoptosis cytokine such as Bax,and neutrophil recruitment associated cytokines,CINC,and TLR-9 were up-regulated after irradiation.The ELISA results of IL-1α,IFN-γ,and TIMP-1 were identical with the results of the two previom analyses.[Conclusion]The results of the three methods in the study should present evidences to prove each other.Some cytokines in the local lesion of oral mucositis during the initiate,development,and progression stages were blocked,while others were positively up-regulated to involving the control of the pathogensis of oral mucositis.

Aim To investigate the effects of cell pro-liferation and activation in HSC-T6 cells by inhibiting the expression of EZH2 , and its partial relevant mech-anism. Methods By introducing the inhibitor DZNep in activated HSC-T6 cells stimulated by TGF-β1 , the protein expression levels of EZH2, p-ERK, p-AKT andα-SMA were detected by Western blot. The siRNA targeting EZH2 was designed and synthesized according to its nucleotide sequence, and their corresponding ex-pression vectors were constructed and transfected into HSC-T6 cells with LipofectamineTM 2000. The prolifer-ation of HSC-T6 cells was determined by MTT. And the protein expression levels of EZH2, p-ERK, p-AKT and α-SMA were measured by Western blot. Results By introducing the inhibitor DZNep in activated HSC-T6 cells stimulated by TGF-β1 , it effectively de-creased the protein levels of EZH2 and also the protein levels of p-ERK, p-AKT and α-SMA. By introducing EZH2-siRNA in activated HSC-T6 cells, it effectively inhibited the cell proliferation, and also the protein levels of EZH2, p-ERK, p-AKT andα-SMA. Conclu-sion Silencing EZH2 expression inhibits HSC-T6 cell proliferation and activation, and EZH2 may be a poten-tial therapeutic target gene for hepatic fibrosis.

Objective To study the therapeutic value of endoscopy for secondary prophylaxis of esophagogastricvariceal bleeding(EGVB).Methods Records of 117 patients with EGVB who were treated with endoscopic ligation and/or histoacryl injection (n =55) and devascularization (n =62) from August 2006 to September 2014 were reviewed.Rebleeding rate,time of rebleeding,incidence of complication,cumulative survival rate,length of ward stay and mean total costs were compared between two groups.Indices were compared according to Child-Pugh.Results The rebleeding rate in the endoscopic group was higher than that in the surgical group[46.2％(24/52) VS 25.0％(15/60),P=0.019] during a mean follow-up of 32.5 months,especially in Child-Pugh B[60.0％(15/25) VS 22.2％(6/27),P=0.006].But the rebleeding time was similar between two groups(P＞0.05).The rate of complications in endoscopic group was lower than that in surgical group [20.0％ (11/55) VS 32.3％ (20/62),P =0.134].No significant difference in cumulative survival rate was observed between the groups (89.1％ VS 87.1％,P＞0.05).The length of ward stay[(14±9)d VS(23±8) d,P＜0.001] and mean total cost[(54 136.79± 44 836.32) yuan VS (73 601.86± 103 403.74)yuan,P＜0.05] in endoscopic group were significantly less than those in surgical group.Conclusion Therapeutic endoscopy is as effective as secondary prophylaxis of esophagogastric variceal bleeding.Endoscopic treatment leads to higher rebleeding rate,but is advantageous in similar rebleeding time,smaller injury,less complications,shorter length of ward stay and lower costs.

Objective To explore the optimal concentration of heparin sodium solution, which to seal up intravenous indwelling needle, in patients with Ⅳ thrombocytopenia. Methods A total of 90 patients withⅣthrombocytopenia who required intravenous indwelling needle were randomly divided into three groups which namely A, B and C groups with 30 cases each. A group was sealed up the tube of intravenous indwelling needle with 1 ml heparin sodium solution of 6.25 U/ml, B group with 12.50 U/ml and C group with 25.00 U/ml. The change of the platelet count, plasma prothrombin time (PT), activated partial thromboplastin time (APTT), plasma fibrinogen (Fbg) after extubation were observed in three groups and the incidence of blocking up and retention time were compared among three groups. Results The change of the platelet count, PT, APTT, Fbg were showed no statistical significance among three groups (P>0.05). The incidence of blocking up was 66.7%(22/30) in A group , 43.3%(13/30) in B group and 16.7%(5/30) in C group. They were showed statistical significance (χ2=15.000, P < 0.01). Retention time of tube above or equal to 3 days were observed respectively 13 person (43.3%,13/30) in A group, 21 cases(70.0%, 21/30) in B group, 25 patients(83.3%, 25/30) in C group. All above were showed statistical significance (χ2=11.000, P<0.01). Conclusions Heparin sodium 25.00 U/ml sealing up the tube of intravenous indwelling needle is safe in patient with Ⅳthrombocytopenia, which will reduce the ration of blocking tube and extend the life of tube.

【Objective】To observe the dynamic interference of cellular endotoxin specific receptors of Toll-like receptor 4(TLR4) mRNA and nuclear factor ?B p65(NF-?B p65) in rats with damp-heat syndrome of seasonal febrile disease by Ganlu Xiaodu Dan(GXD),and to explore the therapeutic mechanism of prescriptions with the actions of clearing heat and resolving dampness.【Methods】Wistar rats were randomized into 3 groups: A(normal control),B(models established by feeding of high-fat diet and colon bacillus under the high-temperature and high-humidity condition),and C(rat models treated with GXD).Reverse transcription-polymerase chain reaction(RT-PCR) analysis was used to detect the TLR4 mRNA level in hepatic macrophages and immunohistochemical method was used to detect the activation of NF-?B p65.【Results】The expression of TLR4 mRNA and NF-?B p65 was increased gradually in group B 6,12 and 24 hours after infection with colon bacillus,and the differences were significant,indicating that the expression of TLR4 mRNA and NF-?B p65 increased with the prolongation of disease course.In group C,TLR4 mRNA expression was decreased in different time points after infection,the difference of TLR4 mRNA expression 12 and 24 hours after infection was significant as compared with group B and group A(P

Objective To study the optimum ultra-dry method and moisture at different storage time for Salvia miltiorrhiza seeds and find the principle of storability.Methods S.miltiorrhiza seeds were dried by silica gel at room temperature and by the oven at constant temperature 50 ℃ to obtain various moisture content before stored sealed at room temperature.The optimum ultra-dry method and the optimal moisture were evaluated by measuring the germination rate,germination tendency,and vigor index,etc.Soluble sugar and MDA content were measured to investigate the seed storability.Results Desiccation by silica gel was more proper than by oven;ultra-dry storage of seeds has obvious advantages at the early stage,but with the prolong of the storage time,the advantages decreased;The optimal moisture for S.miltiorrhiza seeds storage at room temperature is about 7.5%;Seed storability is closely related to soluble sugar content in the seeds.Conclusion S.miltiorrhiza seeds can be ultra-dry stored to preserve germplasm resources.

Objective To investigate the radiation dose and image quality of spectral and conventional CT scan in neck.Methods Sixty patients with enhanced neck CT scan were analyzed retrospectively.The 30 patients with spectral CT scan were included in spectral CT group,and the 30 patients with conventional CT scan were included in conventional CT group.The tube voltage,tube current and rotation speed of the spectral CT group were fast switching with 80 and 140 kVp,630 mA and 0.5 s,respectively.The scanning parameters of conventional CT group were 120 kVp,auto tube current (100 to 600 mA),and 0.6 s,respectively.The objective evaluation [noise and (contrast to noise ratio) CNR] and subjective scores in the upper,middle and lower neck were evaluated.The radiation dose was also evaluated in the two groups.The independent-samples t test was used in comparison of the radiation dose.The independent-samples t test and the rank sum test were used to compare the objective and subjective image quality.Results The CT dose index of spectral and conventional scan in the neck were 17.77 mGy and (17.26±2.18) mGy,respectively without significant difference (t=-1.26,P=0.218).The noises of 65 keV images in upper,middle and lower neck were (4.5 ± 0.8),(4.5 ± 0.9),(5.2 ± 1.0) HU,and the noises of conventional CT images in above-mentioned regions were (4.5± 1.1),(4.1± 1.0),(5.0± 1.7) HU.There was no significant differences (t=0.102,-1.362,-0.621;P＞0.05).The subjective scores of 65 keV images in upper,middle and lower neck were (4.1 ± 0.3),(4.7 ± 0.5),(3.8 ± 0.7),while the subjective scores of conventional CT images in associated region were (4.1±0.4),(4.6 ±0.5),(3.5 ±0.6),wihtout significant differences (Z=-0.286,-0.531,-1.568;P＞0.05).The noises of 55 keV images in upper,middle and lower neck were (5.4±0.9),(5.6± 1.1),(6.6± 1.6) HU,which were significantly higher than noise of conventional images (t=-3.614,-5.560,-3.784;P＜0.05).The subjective scores of 55 keV images in upper and middle neck were (3.7±0.5),(4.2±0.4),which were significantly lower than those of conventional images (Z=-2.541,-3.136;P＜0.05).The subjective score of 55 keV images in lower neck was (3.3±0.8),which was no significant difference in comparison with conventional image (Z=-1.318,P＞0.05).There was no significant difference between the CNR of conventional images and CNR of spectral images with 65 keV and 55 keV in upper,middle and lower neck (P＞0.05).Conclusion The radiation dose and the image quality of spectral CT scan are same to the conventional CT scan in the neck,the 65 keV monochromatic images can be used routinely.