Decreased cerebral blood flow during acute hyperglycemia

被引：34

作者：

Duckrow, RB

机构：

[1] Department of Neurology, The University of Connecticut Health Center, Farmington

来源：

BRAIN RESEARCH | 1995年 / 703卷 / 1-2期

关键词：

cerebral blood flow; hyperglycemia; mannitol; laser-Doppler flowmetry; indomethacin; nitro-L-arginine methyl ester; spreading cortical depression; rat;

D O I：

10.1016/0006-8993(95)01077-7

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Cerebral blood flow (CBF) decreases during acute hyperglycemia but the mechanism of this change is unknown. The role that plasma osmolality plays in this effect was reexamined in pentobarbital-anesthetized rats using a continuous measure of CBF, laser-Doppler flowmetry. CBF decreased 25% during acute elevation of plasma osmolality induced by intraperitoneal injection of concentrated solutions of glucose or mannitol. In addition there were brief transient increases of CBF with peak magnitude 2-4-times the baseline level that were not accompanied by transient depression of electroencephalographic activity. These transient CBF increases may explain why discontinuous methods of CBF measurement fail to detect flow decreases after mannitol injection. Decreased CBF measured during acute hyperglycemia may be the result of increased plasma osmolality.

引用

页码：145 / 150

页数：6

共 37 条

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