Arterio-venous differences in cord levels of catecholamines, glucose, lactate and blood gases

Daisy K M Koh, Robert Hume, Graeme Eisenhofer, Jennifer Watson, Fiona L R Williams (Lead / Corresponding author)

Research output: Contribution to journalArticle

2 Citations (Scopus)
162 Downloads (Pure)

Abstract

Norepinephrine (NE) and epinephrine (EPI) levels are higher in cord arterial blood relative to venous blood, consistent with active mechanisms of placental-maternal clearance. There are no contemporary studies of cord arteriovenous blood levels of sulfated and non-sulfated catechols. To assess the arteriovenous differences in cord blood levels of dopamine (DA), the sulfated catecholamines and their sulfated and non-sulfated metabolites. To correlate levels of oxygen, H+/CO2, and glucose with cord catecholamine levels. Fifty-seven term infants, delivered by elective cesarean section, were recruited. Cord arterial and venous blood was sampled; levels of glucose, lactate, blood gases, six catechols and their sulfated conjugates were measured. With one exception (DOPA sulfate), mean cord arterial levels of sulfated and non-sulfated catechols were significantly higher than venous levels. Arterial lactate and glucose levels were independently associated with NE levels, but only lactate was associated with levels of EPI and DA. This study establishes that in vivo metabolic parameters of hypoxia, respiratory and metabolic acidosis are associated with catecholamine levels, a key relationship for perinatal adaptation and homeostasis, and findings that are consistent with in vitro studies of the regulators of catecholamine secretion.

Original languageEnglish
Pages (from-to)695-704
Number of pages10
JournalJournal of Perinatal Medicine
Volume44
Issue number6
Early online date12 Jan 2016
DOIs
Publication statusPublished - 1 Aug 2016

Keywords

  • catecholamines
  • cesarean section
  • cord blood
  • glucose homeostasis

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