首都医科大学学报 ›› 2001, Vol. 22 ›› Issue (2): 169-172.

• 论著 • 上一篇    下一篇

血液稀释对局部脑缺血大鼠脑血流及脑梗死的影响

梅弘勋1, 王恩真1, 翟晶2, 张辉2, 张家瑾2   

  1. 1. 首都医科大学附属北京天坛医院麻醉科;2. 北京市神经外科研究所生化室
  • 收稿日期:2000-03-02 修回日期:1900-01-01 出版日期:2001-04-15 发布日期:2001-04-15

Effects of Hemodilution on Cerebral Blood Flow and Infarction Size in Rat Model of Focal Cerebral Ischemia

Mei Hongxun1, Wang Enzhen1, Zhai Jing2, Zhang Hui2, Zhang Jiajin2   

  1. 1. Department of Anesthesia, Beijing Tiantan Hospital, Affiliate of Capital University of Medical Science;2. Department of Biochemistry, Beijing Neurosurgical Institute
  • Received:2000-03-02 Revised:1900-01-01 Online:2001-04-15 Published:2001-04-15

摘要:

为探讨中度急性等容血液稀释(ANHD)对大鼠局部脑缺血模型的脑血流和脑梗死面积的影响,将Wistar脑缺血模型大鼠随机分为对照组(n=8)和ANHD组(n=8),于缺血前和缺血120min内,用激光多普勒血流仪连续测定缺血周边皮质的局部脑血流(LCBF)变化,缺血后24h测定脑梗死面积.结果显示2组在脑缺血后LCBF均显着下降(P<0.01).ANHD组下降的幅度显着小于对照组(P<0.01),并且缺血24h后的脑梗死面积也显着小于对照组(P<0.05或P<0.01).提示中度ANHD可增加大鼠局部脑缺血模型的缺血周边区的LCBF,缩小脑梗死面积,在脑缺血情况下具有脑保护作用.

关键词: 血液稀释, 脑缺血, 脑血流, 脑梗死

Abstract:

In order to assess the effects of moderate acute normovolemic hemodilution(ANHD)on cerebral blood flow and infarction size in a rat model of focal cerebral ischemia, sixteen Wistar rats were randomly assigned into two groups: control group(n=8)and ANHD group(n=8). The Hct of the animals in ANHD group was reduced to 30.7%. Cortical local cerebral blood flow(LCBF)was monitored in both groups before and during the 120 min occlusion of the left middle cerebral artery with laser Doppler flowmetry. The infarction size of each brain was determined at 24 h after ischemia. LCBF significantly decreased in both groups(P<0.01). The decreasing degree of the ANHD group was significantly lower than that of the contral group(P<0.01), and its cerebral infarction size was significantly smaller than that of the control group(P<0.05 or P<0.01). The results indicate that moderate ANHD increases cortical LCBF and decreases cerebral infarction size in a rat model of focal ischemia. It has a protective effect on cerebral ischemia.

Key words: hemodilution, cerebral ischemia, cerebral blood flow, cerebral infarction

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