Cited by 85Barrier Structure and Function StudiesTraumatic Brain Injury and Neurovascular DisturbancesAdvanced MRI Techniques and Applications

Permeability limitation in estimation of local brain blood flow with [14C]antipyrine

Eckman, WW, Phair, RD, Fenstermacher, JD, Patlak, CS, Kennedy, C, Sokoloff, L·1975·American Journal of Physiology-Legacy Content

Abstract

Influence of capillary permeability on local cerebral blood flow (LCBF) estimated by the autoradiograhpic diffusible-indicator method was analyzed by computer simulation. Its influence increases with increasing flow. With normal perfusion rates in gray matter, capillary permeability coefficient x surface area (PS value) must exceed 0.12 cm3-s(-1)-g(-1) for estimated LCBF to attain 95% of true values in all structures. In white matter, with its lower perfusion rates, the PS value must exceed 0.035 cm3-s(-1)-g(-1) for equivalent accuracy. [14C]antipyrine, widely used in the LCBF technique, has a PS value below these values and leads to undersestimation of LCBF. Experimental studies in cats in which LCBF was measured with either [14C]antipyrine or the freely diffusible, radioactive gas, [131I]trifluoroiodomethane, demonstrated consistently lower estimates of LCBF with [14C]antipyrine than with the gas; the deviations in the various cerebral structures approximated those predicted by the theoretical analyses. These results suggest that the uptake of [14C]antipyrine by cerebral tissues is diffusion limited as well as flow limited, and it therefore is not an ideal tracer for the autoradiographic LCBF technique.

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Crossref · 10.1152/ajplegacy.1975.229.1.215

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Authors
Eckman, W., Phair, R., Fenstermacher, J., Patlak, C., Kennedy, C., & Sokoloff, L.
Venue
American Journal of Physiology-Legacy Content
Published
1975-07-01
Volume
229
Issue
1
Pages
215-221
ISSN
0002-9513 (ISSN-L)
OpenAlex
W2417320512
Cited by
85
References
0
Citations by year
2018: 1 · 2015: 1
FWCI
5.40
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Legacy Content (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
regional cerebral blood flow, capillary permeability, white matter perfusion, gray matter perfusion
MeSH terms
Animals, Antipyrine, Blood Flow Velocity, Blood Volume, Blood-Brain Barrier, Capillary Permeability, Cats, Cerebrovascular Circulation, Computers, Indicator Dilution Techniques, Methods, Models, Biological

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