Cerebral blood flow and edema in perinatal hypoxic-ischemic brain damage.

Abstract:

:The relationship between cerebral blood flow (CBF) and the evolution of brain edema was investigated in an experimental model of perinatal hypoxic-ischemic brain damage. Seven-d postnatal rats were subjected to unilateral common carotid artery ligation followed by 3 h of hypoxia with 8% oxygen at 37 degrees C. This insult produces neuronal necrosis and/or infarction only in the cerebral hemisphere ipsilateral to the arterial occlusion in the majority of animals; hypoxia alone produces no damage. CBF, measured by the indicator diffusion technique using iodo[14C]-antipyrine, and tissue water content were determined concurrently in both cerebral hemispheres at specific intervals during recovery from cerebral hypoxia-ischemia. Water contents in the ipsilateral cerebral hemisphere were 89.1, 89.6, 89.7, 91.0, and 88.3% at 30 min, 4 h, 24 h, 3 d, and 6 d, respectively (p less than 0.001); whereas the percent tissue water in the contralateral hemisphere was unchanged from values in nonligated, hypoxic control rats (87.7%). CBF was similar in both cerebral hemispheres at 30 min, 4 h, and 24 h of recovery (50-65 mL/100 g/min) and not different from age-matched controls. At 3 and 6 d, CBF in the ipsilateral cerebral hemisphere was 30 and 26% of the contralateral hemisphere and 23 and 29% of the control animals, respectively (p less than 0.001). No inverse correlation existed between the changes in brain water content and CBF at any interval until 6 d of recovery. Thus, an early hypoperfusion does not follow perinatal cerebral hypoxia-ischemia, as occurs in adults.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Mujsce DJ,Christensen MA,Vannucci RC

doi

10.1203/00006450-199005000-00007

subject

Has Abstract

pub_date

1990-05-01 00:00:00

pages

450-3

issue

5

eissn

0031-3998

issn

1530-0447

journal_volume

27

pub_type

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