Cerebral Oxygenation of Premature Lambs Supported by an Artificial Placenta.

Published

Journal Article

An artificial placenta (AP) using venovenous extracorporeal life support (VV-ECLS) could represent a paradigm shift in the treatment of extremely premature infants. However, AP support could potentially alter cerebral oxygen delivery. We assessed cerebral perfusion in fetal lambs on AP support using near-infrared spectroscopy (NIRS) and carotid arterial flow (CAF). Fourteen premature lambs at estimated gestational age (EGA) 130 days (term = 145) underwent cannulation of the right jugular vein and umbilical vein with initiation of VV-ECLS. An ultrasonic flow probe was placed around the right carotid artery (CA), and a NIRS sensor was placed on the scalp. Lambs were not ventilated. CAF, percentage of regional oxygen saturation (rSO2) as measured by NIRS, hemodynamic data, and blood gases were collected at baseline (native placental support) and regularly during AP support. Fetal lambs were maintained on AP support for a mean of 55 ± 27 hours. Baseline rSO2 on native placental support was 40% ± 3%, compared with a mean rSO2 during AP support of 50% ± 11% (p = 0.027). Baseline CAF was 27.4 ± 5.4 ml/kg/min compared with an average CAF of 23.7 ± 7.7 ml/kg/min during AP support. Cerebral fractional tissue oxygen extraction (FTOE) correlated negatively with CAF (r = -0.382; p < 0.001) and mean arterial pressure (r = -0.425; p < 0.001). FTOE weakly correlated with systemic O2 saturation (r = 0.091; p = 0.017). Cerebral oxygenation and blood flow in premature lambs are maintained during support with an AP. Cerebral O2 extraction is inversely related to carotid flow and is weakly correlated with systemic O2 saturation.

Full Text

Duke Authors

Cited Authors

  • El-Sabbagh, AM; Gray, BW; Shaffer, AW; Bryner, BS; Church, JT; McLeod, JS; Zakem, S; Perkins, EM; Shellhaas, RA; Barks, JDE; Rojas-Peña, A; Bartlett, RH; Mychaliska, GB

Published In

Volume / Issue

  • 64 / 4

Start / End Page

  • 552 - 556

PubMed ID

  • 28937410

Pubmed Central ID

  • 28937410

Electronic International Standard Serial Number (EISSN)

  • 1538-943X

Digital Object Identifier (DOI)

  • 10.1097/MAT.0000000000000676

Language

  • eng

Conference Location

  • United States