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pubmed-article:2022549pubmed:abstractTextThese experiments examine the transfer of sucrose, urea, sodium, and albumin from blood to brain in new-born pigs exposed to an increase in ventilation pressure. We also studied the movement of urea and sodium from blood to cerebrospinal fluid (CSF). By use of a standard time-cycled pressure-limited infant respirator, mean airway pressure (Paw) was increased from approximately 3 to 17 cmH2O. Urea and albumin transfer into the brain were unchanged with increased Paw. Sodium transport decreased significantly in all brain regions, while sucrose transfer was increased in the cerebrum [transfer constant (Kin) = 3.5 +/- 0.04 vs. 9.9 +/- 1.0 cm3.g-1.s-1.10(6)] at the increased Paw. Transport of urea nd sodium from blood to CSF decreased to half of control values with increased Paw. Thus, in newborn pigs, increasing Paw selectively alters blood-to-brain transport. In addition, movement of tracers from blood to CSF was severely restricted, possibly by a decrease in CSF production. It appears likely that the increased cerebral venous pressure causes the observed changes in tracer transport. Such altered blood-to-brain transport could adversely affect neuronal function.lld:pubmed
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pubmed-article:2022549pubmed:authorpubmed-author:LefflerC WCWlld:pubmed
pubmed-article:2022549pubmed:authorpubmed-author:BusijaD WDWlld:pubmed
pubmed-article:2022549pubmed:authorpubmed-author:ArmsteadW MWMlld:pubmed
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pubmed-article:2022549pubmed:pagination584-9lld:pubmed
pubmed-article:2022549pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:2022549pubmed:articleTitlePositive-pressure ventilation alters blood-to-brain and blood-to-CSF transport in neonatal pigs.lld:pubmed
pubmed-article:2022549pubmed:affiliationDepartment of Pediatrics, University of Tennessee, Memphis 38163.lld:pubmed
pubmed-article:2022549pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:2022549pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed