Titration of FiO2 after CAR test:
Titration of inspired oxygen was continued as per unit protocol, relying
on combined monitoring of crRTO (targeted between 60 to 80%) and SpO2
(targeted between 86% to 94%), in those infants with maintained CAR,
and who had successful weaning of supplemental oxygen more than 20%
below the starting FiO2 by the end of the CAR test.
FiO2 could be weaned stepwise by 0.02
FiO2 if crRTO was >80%, even when SpO2 is
within acceptable target saturation(20). Mild desaturations and short
self-resolved hypoxemic episodes were observed without intervention as
long as crRTO was maintained within target limits.