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MEASUREMENT OF CEREBRAL BLOOD FLOW WITH HYDROGEN CLEARANCE METHOD : TECHNIQUE AND A COMPARATIVE STUDY WITH THE VENOUS OUT FLOOW METHOD Akira Tamura 1 , Takao Asano 1 , Yoon-kil Tak 1 , Shinya Manaka 1 , kimiyoshi Hirakawa 1 , Keiji Sano 1 1Department of Neurosrgery, Facully of Medicine,Unicersity of Tokyo pp.47-54
Published Date 1978/1/1
DOI https://doi.org/10.11477/mf.1406204183

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  • Abstract
  • Look Inside

Local cerebral blood flow was measured with hydrogen clearance method in fifteen dogs and compared to direct measurement obtained by Michenfelder's venous out flow method. The sagittal sinus was exposed by a midline fronto-occipital incision and extensive craniectomy. A tapered catheter was passed into the superior sagittal sinus. For measuring hydrogen clearance, platinum Will electrodes with a bared tip of 0.5 mm in length and 0.3 mm in diameter were intro-duced into the parietal and occipital cortex. About ten percent hydrogen gas was given directly into the endotracheal tube for three to live minutes and the obtained clearance curves were transferred to semilog graph papers. Toal cerebral blood flow was caliculated by hiconipartniental analysis and compared to the two minutes initial slope index. The results are as follows.

1) A linear regression analysis of flows caliculated from the initial slope and bicompartmental analysis shows a high correlation coelhcient.

2) There is a high correlation between flows caliculated from electrodcs used at the sanii ex-periments.

3) Cerebral blood flow from the initial slope measured by hydrogen clearance method shotvs a high correlation with flows caliculated from Michenfeldcr's venous out flow method.


Copyright © 1978, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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