Determination of cerebral cortical blood flow: a thermal technique.

Abstract:

:A mathematical model for tissue thermodilution was developed to study cerebral cortical perfusion before and after controlled perfusion arrest. Cerebral cortical perfusion rates are readily determined by this method. A thermistor was introduced into the subdural space and secured in direct contact with the frontal cortex in 12 dogs on ketamine and gallamine anesthesia. A 22-gauge angiocath was placed in the right superior thyroid artery and directed into the carotid artery on the same side as the thermistor. The dogs were placed on cardiac bypass using a circuit from the right atrium to the pulmonary artery and a second circuit from the left ventricular apex to the left femoral artery. Arterial pressure, central venous pressure (CVP), intracranial pressure (ICP), and left atrial pressure (LAP) were monitored directly. A heat exchanger was used to maintain a constant blood temperature of 37 C in the output of the left side bypass circuit. Thermal flow curves were generated in the cerebral cortex by injecting 2 to 4 cc of cold saline into the common carotid artery through the injection catheter. Preliminary evaluation of this flow method in comparison to radioactive microspheres indicates that this method can be used in a reliable and reproducible fashion to determine cerebral cortical blood flow.

journal_name

Ann Emerg Med

authors

Hoehner PJ,Krause GS,White BC,Gadzinski DS

doi

10.1016/s0196-0644(83)80123-1

subject

Has Abstract

pub_date

1983-01-01 00:00:00

pages

2-7

issue

1

eissn

0196-0644

issn

1097-6760

pii

S0196-0644(83)80123-1

journal_volume

12

pub_type

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