血管

It's very important to regulate the expression of AT2R gene according to our need when utilizing transgenic technology. Recently it has been found that mesenchymal stem cell can differentiated into VSMC or endotheliocyte cell and then influence the vascular endothelial repair.

既往研究发现来源于骨髓的间充质干细胞在血管内皮损伤后黏附于损伤的血管局部，在此基础上进一步分化为血管平滑肌细胞和内皮细胞，从而参与血管的损伤后修复过程。

Epithelioid hemangioendotheliomas are intermediate grade vascular malignancies that are closely associated with or arise from a vein in 50% of cases.

上皮样血管内皮瘤是中度恶性的血管肿瘤，50%的病例与血管密切相关或起源于血管。

This study is aimed to evaluate the distribution of these risk factors among the stroke patients with or without large artery artherosclerosis intracerebral/extracerebral.

回顾性统计2006年3月至2008年6月在华山医院神经内科诊治的脑梗死患者的一般信息、卒中危险因素、头颈部血管影像学资料，并对上述患者根据头颈部血管影像学资料（B超、CTA、MRA及DSA）对其是否合并有责任大血管狭窄进行分组；应用单因素χ2检验分析各个危险因素在不同分组间的差异，并对危险因素与不同血管病变分组之间的相关性进行多元logistic回归分析。

People often occur in elderly vascular sclerosis, high blood pressure sustained more easily lead to cerebral arteriosclerosis, vessel wall hyalinization appears fat, thus weakening the strength of the vessel wall, together with the blood of the structure of the wall is relatively weak, the middle vascular myocytes less, the lack of external elastic layer developed arterial adventitia easily occurred in the brain artery wall limitations small expansion, the formation of micro-miliary aneurysm.

人到老年血管常会发生硬化，持续的高血压更容易导致脑动脉硬化，血管壁出现脂肪玻璃样变，从而削弱血管壁的强度，加上脑血管壁的结构比较薄弱，血管中层肌细胞少，缺乏外弹力层，动脉外膜不发达，容易造成脑内小动脉壁发生局限性扩张，形成粟粒性微动脉瘤。

Ascular laboratories must hae strict quality assurance programs to establish optimal internal diagnostic criteria, employ credentialed ascular technologists, and obtain ascular laboratory accreditation (Intersocietal Commission for the Accreditation of ascular Laboratories; American College of Radiology). It is likely that reimbursement for these studies will be limited toaccredited laboratories in the future.

血管超声中心应该有严格的质量保证，建立每个中心自己最优化的诊断标准，聘用有资格认证的血管超声检测技术人员，获取血管超声中心的认证资格（美国放射学会血管研究资格认证委员会）。，将来用于这类研究的资金很可能将仅限于给予这些取得认证的中心。

VR－ 3D was found to be a fast noninvasive and effective method to image complex vascular structures.It can take the place of angiography in arteriovenous malformation,meningioma and bigger intravertebral blood vessel branch embolism.

VR－3D血管造影是快速而有效的无创伤血管成像术，优于SSD及MIP，其中动静脉畸形、脑膜瘤、较大脑内血管分支阻塞可替代血管造影。

Was simultaneously injected into cisterna magna at the second injection blood in the presence of subarachnoid blood. At 2 to 4 days, GFP was expressed in leptomeninges over the brain stem, cortex and cerebral arteries, smooth muscle cells of small vessels were occasionlly transduced. GFP was expressed in adventitia of spastic basilar artery on days 2 (day 5 after first injection blood) after injection 〓, but was undetectable by days 4, transgene was not expressed in medial or intimal layers. The prensence of subarachnoid blood can not prevent access of adenovirus to vessels and transgene expression.

注入腺病毒载体后2天（初次注血第5天）行荧光显微镜、免疫组织化学和RT-PCR检测，结果在颅内大血管如基底动脉的外膜可见外源基因的表达，而外源基因不能转移至血管中膜和内膜，4天时（初次注血第7天）基底动脉的外膜中外源基因表达消失；注入腺病毒载体后2～4天，外源基因可以有效转移至颅底软脑膜细胞，小血管外膜和平滑肌层也可见外源基因的表达，表明蛛网膜下腔内的血凝块不能阻止腺病毒载体介导外源基因转移至颅内血管。

Results Among 6 cases with PCTPV, 4 cases revealed occlusion of the main branch of portal vein at the hepatic hilum, 2 cases revealed occlusion of the common portal vein, and a masslike network of tortuous veins around the hepatic hilum and many small irregular veins radiating from the network to the liver were demonstrated.

结果：6例中4例清楚显示门脉主要分支近肝门处阻塞，2例门静脉主干阻塞，代之以肿块样纡曲血管并在其周围形成向肝性放射状侧支血管影像，以及离肝性侧支循环静脉。6例CT血管成像均能对与分流或断流手术有关的血管解剖提供准确信息。

This study consists 3 partsPart I: the research on the mechanism of affecting the growth of CAM vesselsBecause neoformative vessels is most related with bFGF and VEGF, this study designed bFGF, VEGF and the primer of its receptor, by the experiment of the generation of CAM vessels, draw the materials from CAM tissues consist account of vessels, by the experiment of RT-PCR, reserve the influence of HSYA on the expression of bFGF, VEGF, VEGF-R(flt-1) in CAM tissues.

本实验分为三部分：第一部分，HSYA影响鸡胚尿囊膜血管生成的机理研究由于新生血管与bFGF、VEGF及其受体的关系最为密切，本实验设计了bFGF、VEGF及其受体的引物，利用CAM血管生成实验，直接从富含血管的CAM组织上取材，通过RT-PCR实验，观察HSYA对CAM组织中上述三个基因表达的影响。

Methods:The artificial defects of 20 rabbits were repaired with frozen allogeneic mandible and fresh syngeneic mandible to study the revascularization's dynamic process of mandible transplantation by the inkgelation vascular perfusion,vascular corroisioncast,Nuclein scintigraphy;the 85 cases received frozen allogeneic mandible transplantation and the measures to improve revascularization;The defects were implanted with bFGF and allogeneic bone,the defects were only repaired with allogeneic bone as control group.

通过冷冻异体下颌骨和新鲜自体骨移植修复20例家兔下颌骨缺损的动物实验，经墨汁明胶血管灌注法、血管铸型法、放射性核素骨显像研究了异体下颌骨移植再血管化及骨改建的动态过程；同时另20例采用bFGF和异体骨修复作为实验组，单纯异体骨修复作为对照组，植入后1个月、3个月行墨汁明胶血管灌注透明法及组织学观察。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。