查询词典 ischemia

Methods Perfusion weighted imaging was performed in 45 cases of cerebral infarction. The sidetoside ratios of regional cerebral blood flow,regional cerebral blood volume and mean transit time were measured at duty lesion of ischemia. The hypoperfused cerebral areas and the stages of ischemia were defined as follows:compensation stage: rCBF was normal, rCBVwas increased, MTT was prolonged;decompensation stage: rCBF was slightly decreased, rCBV was normal or decreased, MTT was prolonged;preinfarction stage: rCBF and rCBV were decreased,MTT was prolonged.

利用磁共振灌注成像技术（perfusion weighted imaging，PWI）对45例缺血性脑血管病患者的责任病灶进行局部脑血流量，局部脑血容量，平均通过时间比值测定，确定低灌注脑区的影像学特点和缺血分期：代偿期（rCBF保持正常，rCBV升高，MTT延长）；失代偿期（rCBF轻度下降，rCBV正常或下降，MTT延长）；梗死前期：（rCBF下降，rCBV下降，MTT延长）。

Neurogenesis in DG could be induced to increase at a certain time window after global ischemia reperfusion. The accommodational mechanisms of neurogenesis were possibly related to the changes of hormones, neurotransmitters, neurotrophic factors and the micro-circumstances of the dentate gyrus after ischemia.

结论缺血性脑损伤可诱导海马齿状回神经元发生水平在一定时间窗内上调，其机制可能与缺血引起脑组织激素水平、神经递质、神经营养因子浓度发生变化以及齿状回局部微环境改变有关。

Methods］ Healthy SD rats were divided randomly into 6 group, including: normal control group(sham-operation), ischemia for 45 min (reperfusion 0h, n=6), reperfusion 2,4,12 and 24 hr group. Renal ischemia reperfusion injury models were founded in other five groups, opened abdominal and placed atraumatic vascular champ in dual kidney pedicle for 45 minutes,followed by reperfusion 2,4,12 and 24 hr.

方法］ 将SD大鼠随机分成正常对照组、单纯缺血组、再灌注2 h组、4 h组、12 h组、24 h组，制备双侧肾蒂夹闭模型后，腹主动脉取血测血肌酐、尿素氮，行肾脏组织病理学检查，免疫组化法检测TGFβ1 蛋白，RT-PCR法检测TGFβ1 mRNA。

Posttourniquet syndrome, as first recognized by Bunnell[1], is a common reaction to prolonged ischemia and is characterized by edema, pallor, joint stiffness, motor weakness, and subjective numbness. This complication is thought to be related to the duration of ischemia and not to the mechanical effect of the tourniquet. Sapega[2] et al.

止血带综合征首先由Bunnell[1]认识，是肢体对长时间缺血的共同反应，表现为水肿、苍白、关节僵硬、运动无力以及主观感觉麻木，被认为与缺血持续时间有关，而与止血带的机械作用无关。

Posttourniquet syndrome, as first recognized by Bunnell[1], is a common reaction to prolonged ischemia and is characterized by edema, pallor, joint stiffness, motor weakness, and subjectie numbness. This complication is thought to be related to the duration of ischemia and not to the mechanical effect of the tourniquet. Sapega[2] et al.

止血带综合征首先由Bunnell[1]认识，是肢体对长时间缺血的共同反应，表现为水肿、苍白、关节僵硬、运动无力以及主观感觉麻木，被认为与缺血持续时间有关，而与止血带的机械作用无关。

Objective: To observe the motor function variation of focal cerebral ischemical reperfusion injury rats'limbs at different time. To observe the expression of PCNA and VEGF. To observe the effect to that index when electric acupuncture the"Quchi"and"Housanli". To observe the effect to the focal cerebral ischemical reperfusion injury rats, which are inject eNOS catastaltic, when electric acupuncture that two acupoints. Through observing of above all things , we study acupuncture's blood vessel regenerated effect to cerebral ischemia reperfusion injury region, approach the possibility of brain functional recovery angiogenesis which promoted by acupuncture, provide new consider and experiment accordings for deepening acupuncture therapy of the ischemia stroke.

研究目的：通过观察局灶性脑缺血再灌注损伤大鼠不同时间点肢体运动功能的变化及损伤脑组织核心增长蛋白、血管内皮细胞生长因子的表达情况，电针&曲池&、&后三里&穴对以上各指标的影响、电针&曲池&、&后三里&对给予eNOS抑制剂对局灶性脑缺血再灌注损伤大鼠的影响，研究针刺对大鼠脑缺血再灌注损伤区血管再生的作用，探讨针刺促进脑功能恢复的血管生成可能机制，为进一步深化针灸治疗缺血性中风的认识提供新的思路和实验依据。

Inclusion: Oncreased releases of GABA and Gly are involved in the pathogeneses of brain ischemia and the PKC inhibitor chelerythrine may have some protective effects on cerebral ischemia through this mechanism.

脑缺血时纹体GABA和Gly释放的明显升高参与了脑缺血病理过程，蛋白激酶C抑制剂Chelerythrine可能通过这一机制具有某些保护缺血大脑的作用。

Mod- cled rats wene classified into three stage: ischemia lo minutes, 2 hors and 3 hours with reperfusion 1 hour. Each stage includech trmee groups: pseuopera- tran group, simple ischemia group, acupuncture groap. Obseruation were car- ried out in three aspects: genl expression; ultrastructure; focal Volume.

将造模后大鼠分成缺血10分钟，缺血1小时，缺血3小时再灌注1小时三个时间段，每时间段又分假手术组，单纯缺血组，针刺组，在基因表达：超微结构，病灶体积三个方面进行了观察。

ResultsBVF could remarkably lengthen the survival time of cerebral ischemia and anoxia mice, and the time of catching their breath after mice decollated,could evidently decrease mouse brain capillary vessel permeability and the content of MDA, increase activity of SOD in the brain tissues of cerebral ischemia and anoxia mice.

方法采用小鼠断头、结扎双侧颈总动脉等脑缺血缺氧模型，观察苦菜总黄酮对脑缺血缺氧小鼠存活时间、断头小鼠喘息时间及脑毛细血管通透的影响；TBA法、NBT法测定小鼠脑缺血缺氧后脑组织MDA含量和SOD活性。

ResultsBVF could remarkably lengthen the survival time of cerebral ischemia and anoxia mice, and the time of catching their breath after mice decollated,could evidently decrease mouse brain capillary vessel permeability and the content of MDA, increase activity of SOD in the brain tissues of cerebral ischemia and anoxia mice.

结果苦菜总黄酮能显著延长小鼠存活时间、喘息时间，能显著降低缺血缺氧小鼠脑毛细血管的通透性，能显著降低脑组织MDA含量，能显著提高脑组织SOD活性。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。