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European Journal of Nuclear Medicine and Molecular Imaging

Published in:

01-05-2012 | Original Article

Dynamic FDG PET for assessing early effects of cerebral hypoxia and resuscitation in new-born pigs

Authors: Charlotte de Lange, Eirik Malinen, Hong Qu, Kjersti Johnsrud, Arne Skretting, Ola Didrik Saugstad, Berit H. Munkeby

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 5/2012

Abstract

Purpose

Changes in cerebral glucose metabolism may be an early prognostic indicator of perinatal hypoxic–ischaemic injury. In this study dynamic ¹⁸F-FDG PET was used to evaluate cerebral glucose metabolism in piglets after global perinatal hypoxia and the impact of the resuscitation strategy using room air or hyperoxia.

Methods

New-born piglets (n = 16) underwent 60 min of global hypoxia followed by 30 min of resuscitation with a fraction of inspired oxygen (FiO₂) of 0.21 or 1.0. Dynamic FDG PET, using a microPET system, was performed at baseline and repeated at the end of resuscitation under stabilized haemodynamic conditions. MRI at 3 T was performed for anatomic correlation. Global and regional cerebral metabolic rates of glucose (CMR_gl) were assessed by Patlak analysis for the two time-points and resuscitation groups.

Results

Global hypoxia was found to cause an immediate decrease in cerebral glucose metabolism from a baseline level (mean ± SD) of 21.2 ± 7.9 to 12.6 ± 4.7 μmol/min/100 g (p <0.01). The basal ganglia, cerebellum and cortex showed the greatest decrease in CMR_gl but no significant differences in global or regional CMR_gl between the resuscitation groups were found.

Conclusion

Dynamic FDG PET detected decreased cerebral glucose metabolism early after perinatal hypoxia in piglets. The decrease in CMR_gl may indicate early changes of mild cerebral hypoxia–ischaemia. No significant effect of hyperoxic resuscitation on the degree of hypometabolism was found in this early phase after hypoxia. Cerebral FDG PET can provide new insights into mechanisms of perinatal hypoxic–ischaemic injury where early detection plays an important role in instituting therapy.

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Title: Dynamic FDG PET for assessing early effects of cerebral hypoxia and resuscitation in new-born pigs
Authors: Charlotte de Lange
Eirik Malinen
Hong Qu
Kjersti Johnsrud
Arne Skretting
Ola Didrik Saugstad
Berit H. Munkeby
Publication date: 01-05-2012
Publisher: Springer-Verlag
Published in: European Journal of Nuclear Medicine and Molecular Imaging / Issue 5/2012
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI: https://doi.org/10.1007/s00259-011-2055-y

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Dynamic FDG PET for assessing early effects of cerebral hypoxia and resuscitation in new-born pigs

Abstract

Purpose

Methods

Results

Conclusion

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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