title: Difference in cerebral and peripheral hemodynamics among term and preterm infants during the first three days of life.
abstract: BACKGROUND
  The relationship between cerebral and peripheral hemodynamics during the early postnatal period has not been clarified.
  
  
  OBJECTIVE
  To evaluate cerebral and peripheral oxygenation and blood volumes between term and preterm infants during the first 3 days of life.
  
  
  METHODS
  We performed near-infrared time-resolved spectroscopy on 32 term infants (term group) and 40 preterm infants (preterm group), with an optode placed on their forehead and upper arm. The cerebral blood volume (CBV), peripheral blood volume (PBV), cerebral Hb oxygen saturation (cSO2) and peripheral Hb oxygen saturation (pSO2) were measured at 3-6, 12, 24, 48 and 72 h after birth.
  
  
  RESULTS
  The CBV in the term group (2.45 ± 0.47 ml/100 g) was significantly higher than that in the preterm group (1.97 ± 0.33 ml/100 g). In contrast to the CBV, the PBV in the preterm group (3.63 ± 0.76 ml/100 g) was significantly higher than that in the term group (3.26 ± 0.56 ml/100 g). In the preterm group, there was a significant positive relationship between the CBVs and PBVs at each time point except at 72 h after birth. Despite the differences in blood volumes, there were no differences in the cSO2 and pSO2 between the two groups.
  
  
  CONCLUSIONS
  The contrasting results in the CBV and PBV between the term and preterm infants might be explained by differences in the maturation of the physiological mechanism to control CBV and PBV.
authors.affiliation: Department of Pediatrics, Tokyo Medical University, Tokyo, Japan.
authors.forename: Tao
authors.initials: T
authors.lastname: Fujioka
authors.forename: Takeshi
authors.initials: T
authors.lastname: Takami
authors.forename: Hiroki
authors.initials: H
authors.lastname: Ishii
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kondo
authors.forename: Daisuke
authors.initials: D
authors.lastname: Sunohara
authors.forename: Hisashi
authors.initials: H
authors.lastname: Kawashima
mesh_terms: D000367:Age Factors; D001775:Blood Circulation / Q000502:physiology*; D001810:Blood Volume; D001921:Brain / Q000098:blood supply*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D004453:Echoencephalography; D005260:Female; D006439:Hemodynamics; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology; D008297:Male; D010100:Oxygen / Q000097:blood; D047929:Term Birth / Q000502:physiology
chemical_list: D010100:Oxygen