Document Detail


Development of cerebral blood flow volume in preterm neonates during the first two weeks of life.
MedLine Citation:
PMID:  16183816     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To investigate the postnatal development of cerebral perfusion in preterm neonates with normal brains over the first 2 wk of life, a prospective longitudinal study was designed. Quantitative measurement of cerebral blood flow (CBF) volume was performed using ultrasound flowmetry of the extracranial, brain-feeding arteries in 32 preterm infants of 28-35 wk gestational age. Measurements were done in the internal carotid and vertebral arteries of both sides on d 1, 2, 3, 7, and 14 after birth. A 10.0-MHz linear transducer of a computed sonography system (Acuson 128/XP10) was used. Intravascular flow volumes were calculated as the product of angle-corrected time-averaged flow velocity and the cross-sectional area of the vessel. Mean CBF volume increased markedly over the first 2 wk. One-third of this rise already occurred from the first to the second postnatal day, thereafter there was a continuous increase from d 2 to d 14 of life. Whereas the absolute level of CBF volume was primarily determined by postmenstrual age, the pattern of postnatal changes in CBF volume was found to be independent of gestational age. Arterial carbon dioxide tension, mean arterial blood pressure, and hematocrit had no influence on the development of CBF volume. The pronounced increase of CBF volume from d 1 to d 2 is likely to represent a normal adaptive response of the cerebral circulation to postnatal life. The data presented here may serve as the basis for further studies to investigate whether deviations from this adaptive response are associated with an increased risk of brain injury.
Authors:
Martin Kehrer; Gunnar Blumenstock; Stefan Ehehalt; Rangmar Goelz; Christian Poets; Martin Schöning
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-09-23
Journal Detail:
Title:  Pediatric research     Volume:  58     ISSN:  0031-3998     ISO Abbreviation:  Pediatr. Res.     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-10-31     Completed Date:  2006-01-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0100714     Medline TA:  Pediatr Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  927-30     Citation Subset:  IM    
Affiliation:
Department of Child Neurology, University Children's Hospital, D-72076 Tübingen, Germany.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Cerebrovascular Circulation*
Humans
Infant, Newborn
Infant, Premature*
Prospective Studies

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