Effect of dexmedetomidine, a selective and potent alpha 2-agonist, on cerebral blood flow and oxygen consumption during halothane anesthesia in dogs.

Abstract:

:The effect of the alpha 2-agonist dexmedetomidine on the cerebral blood flow (CBF) and the metabolic rate for oxygen was studied by a sagittal sinus outflow technique in dogs during halothane anesthesia. Dexmedetomidine was given in a dose (10 micrograms/kg) reported to reduce the anesthetic requirement of halothane by 90%. During 0.9% halothane anesthesia dexmedetomidine caused a significant reduction in CBF without influencing the metabolic rate for oxygen. Reducing the halothane concentration to 0.1% caused no further change in CBF, but increased the metabolic rate for oxygen 19%. The cerebral vasoconstrictive effect, combined with the 90% reduction in MAC for halothane, indicates that dexmedetomidine might be a useful adjunct to inhalation anesthetics during neurosurgery in situations where an increase in CBF should be avoided.

journal_name

Anesth Analg

journal_title

Anesthesia and analgesia

authors

Karlsson BR,Forsman M,Roald OK,Heier MS,Steen PA

doi

10.1213/00000539-199008000-00003

subject

Has Abstract

pub_date

1990-08-01 00:00:00

pages

125-9

issue

2

eissn

0003-2999

issn

1526-7598

journal_volume

71

pub_type

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