title: [Correlation between the inspired fraction of oxygen, maternal partial oxygen pressure, and fetal partial oxygen pressure during cesarean section of normal pregnancies].
abstract: OBJECTIVE
  Despite changes in pulmonary function, maternal oxygenation is maintained during obstetric regional blocks. But in those situations, the administration of supplementary oxygen to parturients is a common practice. Good fetal oxygenation is the main justification; however, this has not been proven. The objective of this randomized, prospective study was to test the hypothesis of whether maternal hyperoxia is correlated with an increase in fetal gasometric parameters in elective cesarean sections.
  
  
  METHODS
  Arterial blood gases of 20 parturients undergoing spinal block with different inspired fractions of oxygen were evaluated and correlated with fetal arterial blood gases.
  
  
  RESULTS
  An increase in maternal inspired fraction of oxygen did not show any correlation with an increase of fetal partial oxygen pressure.
  
  
  CONCLUSIONS
  Induction of maternal hyperoxia by the administration of supplementary oxygen did not increase fetal partial oxygen pressure. Fetal gasometric parameters did not change even when maternal parameters changed, induced by hyperoxia, during cesarean section under spinal block.
authors: Hospital Lifecenter. chvcastro@gmail.com
authors: Carlos Henrique Viana de
authors: CH
authors: Castro
authors: Marcos Guilherme Cunha
authors: MG
authors: Cruvinel
authors: Fabiano Soares
authors: FS
authors: Carneiro
authors: Yerkes Pereira
authors: YP
authors: Silva
authors: Antônio Carlos Vieira
authors: AC
authors: Cabral
authors: Roberto Cardoso
authors: RC
authors: Bessa
mesh_terms: D000328:Adult; D001784:Blood Gas Analysis; D002585:Cesarean Section; D005260:Female; D005333:Fetus / Q000378:metabolism*; D006801:Humans; D000860:Hypoxia / Q000378:metabolism; D001239:Inhalation; D010100:Oxygen / Q000378:metabolism*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000378:metabolism; D011312:Pressure; D011446:Prospective Studies; D055815:Young Adult
chemical_list: D010100:Oxygen