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Rev Esp Anestesiol Reanim · Dec 2008
Randomized Controlled Trial[Is oxygen therapy truly useful and necessary during elective cesarean section under spinal anesthesia?].
- F Palacio, J R Ortiz-Gómez, I Fornet, P Morillas, L Bermejo, and A López.
- Servicio de Anestesiología y Reanimación, Hospital General Universitario Gregorio Marañón, Madrid.
- Rev Esp Anestesiol Reanim. 2008 Dec 1;55(10):597-604.
ObjectiveTo analyze maternal and fetal well-being with and without the application of oxygen therapy.Material And MethodsRandomized trial of full-term parturients who had received prenatal care during pregnancy. The women were healthy and classified as ASA 1. They were scheduled for delivery by cesarean section under spinal anesthesia and randomized to 2 groups to breathe room air or air providing an inspired oxygen fraction of 40% through a face mask. We assessed the well-being of the neonate immediately after birth with the Apgar test and by measuring umbilical cord blood gases.ResultsOne hundred thirty women were enrolled. Both groups were similar, with no differences in demographic or hemodynamic variables, time from uterine incision to fetal extraction, neonatal birth weight, presence of umbilical cord abnormalities, type of resuscitation required by the neonate, or Apgar score in the first or fifth minute. Oxygen saturation in maternal blood by pulse oximetry was higher after 10 minutes in the group of women who received supplemental oxygen through face masks. We also observed significant differences in umbilical cord arterial blood between the room air and supplemental oxygen groups, respectively, as follows: PaCO2, 51.14 mm Hg vs 54.33 mm Hg (P=.016); bicarbonate, 22.19 mEq L(-1) vs 23.23 mEq L(-1) (P=.012); lactate, 1.85 mmol L(-1) vs 1.64 mmol L(-1) (P=.038). The PO2 in venous blood also differed significantly: 25.53 mm Hg vs 28.13 mm Hg, respectively (P=033).ConclusionsBreathing supplemental oxygen or not during elective cesarean delivery of healthy parturients under spinal anesthesia does not have a significant effect on neonatal well-being.
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