Reduced postnatal cerebral glucose metabolism measured by PET after asphyxia in near term fetal lambs
The effects of fetal asphyxia on cerebral function and development, involve the transition from fetal to neonatal life. Changes in cerebral glucose metabolism may be an early postnatal indicator of fetal asphyxia. The objective is to develop an experimental lamb model involving the transition from f...
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Published in | Journal of neuroscience research Vol. 66; no. 5; pp. 844 - 850 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
John Wiley & Sons, Inc
01.12.2001
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Subjects | |
Online Access | Get full text |
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Summary: | The effects of fetal asphyxia on cerebral function and development, involve the transition from fetal to neonatal life. Changes in cerebral glucose metabolism may be an early postnatal indicator of fetal asphyxia. The objective is to develop an experimental lamb model involving the transition from fetal to neonatal life and to examine the effect of fetal asphyxia with cerebral hypoxic ischemia on early postnatal cerebral glucose metabolism. Fetal asphyxia was induced by total umbilical cord occlusion in eight near‐term fetal lambs (134–138 days) with the ewe under isoflurane‐opiate anesthesia. The mean occlusion time until cardiac arrest was 14.5 (4.2) min (SD). Lambs were immediately delivered and standardized resuscitation was instituted after 2 min asystole. At 4 hr postnatal age, [18‐F]Fluoro‐2‐deoxy‐glucose (18‐FDG) was injected intravenously in eight asphyxiated lambs and in eight controls. Cerebral glucose metabolism was examined by positron emission tomography (PET). As a result the mean arterial blood pressure, acid‐base values, blood glucose and serum lactate at 4 hr postnatal age did not differ significantly between lambs subjected to umbilical cord occlusion and controls. EEG was abnormal in all lambs subjected to cord occlusion and normal in the controls at 4 hr postnatal age. Global cerebral metabolic rate (CMRgl) as determined by PET was significantly lower in lambs subjected to cord occlusion mean/median (SD) 22.2/19.6 (8.4) μmol/min/100 g) than in controls mean/median (SD) 37.8/35.9 (6.1); P < 0.01). Global CMRgl is significantly reduced in newborn lambs 4 hr after fetal asphyxia induced by umbilical cord occlusion. A reduction in CMRgl is an early indicator of global hypoxic cerebral ischemia. © 2001 Wiley‐Liss, Inc. |
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Bibliography: | Sven Jerring Foundation Swedish Medical Research Council - No. 4732; No. 5980 First of May Flower Annual Foundation Thelma Zoegas Foundation istex:4619B785EAE640CC1B80EEBFDD406465928E850A Segerfalk Foundation Axel and Margaret Axelsson-Johnson Foundation Royal Physiographic Society ark:/67375/WNG-3W47H3B8-V Linnéa and Josef Carlssons Foundation Swedish Government Lund University Hospital Medical Faculty of Lund University ArticleID:JNR10051 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0360-4012 1097-4547 1097-4547 |
DOI: | 10.1002/jnr.10051 |