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[颈动脉血流速率对供应至脑部血液的血细胞比容的影响]

[Effect of the blood flow rate in the carotid artery on the hematocrit of the blood distributed to the brain].

作者信息

Mchedlishvili G I, Varazashvili M N

出版信息

Biull Eksp Biol Med. 1982 May;93(5):12-4.

PMID:7093497
Abstract

The red cell count and hematocrit were determined in the blood distributed to the rabbit brain through the carotid artery. Both parameters were found to be far greater than those in the blood distributed to the hind limb through the femoral artery. The decrease in the blood flow velocity in the carotid artery (caused by local luminal narrowing and increase in the flow resistance) brought about a proportional diminution of both red cells and hematocrit in the blood inflowing to the brain. Meanwhile these parameters remained unchanged in the control arteries (femoral and contralateral carotid ones). Hence the separation of red blood cells from the blood plasma in the vascular system occurs in the arterial branchings and depends on the blood flow velocity in the appropriate branches.

摘要

对通过颈动脉输送到兔脑的血液进行了红细胞计数和血细胞比容测定。发现这两个参数均远高于通过股动脉输送到后肢的血液中的相应参数。颈动脉中血流速度的降低(由局部管腔狭窄和血流阻力增加引起)导致流入大脑的血液中的红细胞和血细胞比容成比例减少。同时,这些参数在对照动脉(股动脉和对侧颈动脉)中保持不变。因此,血管系统中红细胞与血浆的分离发生在动脉分支处,并且取决于相应分支中的血流速度。

相似文献

1
[Effect of the blood flow rate in the carotid artery on the hematocrit of the blood distributed to the brain].[颈动脉血流速率对供应至脑部血液的血细胞比容的影响]
Biull Eksp Biol Med. 1982 May;93(5):12-4.
2
[Differences in the concentration of erythrocytes and the hematocrit value in the blood in relation to the location of the vessels and the intensity of the blood flow].[血液中红细胞浓度和血细胞比容值与血管位置及血流强度的关系]
Biull Eksp Biol Med. 1986 Oct;102(10):387-8.
3
Regional hematocrit changes related to blood flow conditions in the arterial bed.与动脉床血流状况相关的局部血细胞比容变化。
Clin Hemorheol Microcirc. 2003;29(2):71-9.
4
Changes in blood flow: hematocrit relationship in larger blood vessels.大血管中血流与血细胞比容关系的变化
Biorheology. 1986;23(4):385-93. doi: 10.3233/bir-1986-23407.
5
Comparison of changes in vascular resistance between choroid and other organs following ligation of carotid artery.颈动脉结扎后脉络膜与其他器官血管阻力变化的比较。
Jpn J Ophthalmol. 1991;35(2):188-93.
6
Lower blood flow velocity, higher resistance index, and larger diameter of extracranial carotid arteries are associated with ischemic stroke independently of carotid atherosclerosis and cardiovascular risk factors.较低的血流速度、较高的阻力指数以及颅外颈动脉较大的直径与缺血性中风相关,且独立于颈动脉粥样硬化和心血管危险因素。
J Clin Ultrasound. 2007 Jul-Aug;35(6):322-30. doi: 10.1002/jcu.20351.
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[Changes in the carotid artery tonus of cats in response to changes in the blood flow rate].[猫的颈动脉张力随血流速度变化的改变]
Biull Eksp Biol Med. 1984 Nov;98(11):515-7.
8
Flow-induced control of arterial lumen.血流诱导的动脉管腔控制。
Acta Physiol Hung. 1986;68(3-4):241-51.
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[High concentration of erythrocytes in blood circulating in the brain].[大脑血液循环中血液的高红细胞浓度]
Biull Eksp Biol Med. 1980 Nov;90(11):521-3.
10
Normal values of volume flow in the internal carotid artery measured by a new angle-independent Doppler technique for evaluating cerebral perfusion.采用一种新的与角度无关的多普勒技术测量颈内动脉血流容积的正常数值,用于评估脑灌注。
Acta Neurochir (Wien). 2004 Sep;146(9):983-6; discussion 986-7. doi: 10.1007/s00701-004-0324-2. Epub 2004 Jul 15.