Cerebral pathophysiology in hemorrhagic shock. Nuclide scan data, fluorescence microscopy, and anatomic correlations.

Abstract:

:Nineteen unanesthetized sheep were given Evans blue dye or radionuclide and then were incrementally bled into hemorrhagic shock (BP less than 50/25) by withdrawal of blood over a period of approximately one hour. Four sheep served as controls for histologic data. Static nuclide brain scans performed in 6 bled sheep demonstrated immediate uptake of the radionuclide. Fluroescence microscopic examination of brain tissue obtained at autopsy in bled sheep demonstrated dye uptake in the perivascular areas, but not in the neuropil. Electron microscopic examination of collateral cortical biopsy specimens showed swelling of perivascular astrocytic foot processes, but no endothelial abnormality. We feel that the uptake of radionuclide and dye-albumin complex by the perivascular astrocytes represents enhanced transendothelial transport rather than passage of molecules between endothelial cells. The significance of this presumably transient phenomenon is discussed.

journal_name

Stroke

journal_title

Stroke

authors

Bronshvag MM

doi

10.1161/01.str.11.1.50

subject

Has Abstract

pub_date

1980-01-01 00:00:00

pages

50-9

issue

1

eissn

0039-2499

issn

1524-4628

journal_volume

11

pub_type

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