To compare the effect of two different automated oxygen control devices on target range (TR) time and occurrence of hypoxaemic and hyperoxaemic episodes.
Preterm infants (n=15) born between 24+0 and 29+6 days of gestation, receiving invasive or non-invasive respiratory support with oxygen saturation (SpO 2) TR of 91%–95%. Median gestational age 26 weeks and 4 days (IQR 25 weeks 3 days–27 weeks 6 days) and postnatal age 19 (IQR 17–24) days.
Inspired oxygen concentration was titrated by the OxyGenie controller (SLE6000 ventilator) and the CLiO 2 controller (AVEA ventilator) for 24 hours each, in a random sequence, with the respiratory support mode kept constant.
Time spent within set SpO 2 TR (91%–95% with supplemental oxygen and 91%–100% without supplemental oxygen).
Time spent within the SpO 2 TR was higher during OxyGenie control (80.2 (72.6–82.4)% vs 68.5 (56.7–79.3)%, p<0.005). Less time was spent above TR while in supplemental oxygen (6.3 (5.1–9.9)% vs 15.9 (11.5–30.7)%, p<0.005) but more time spent below TR during OxyGenie control (14.7 (11.8%–17.2%) vs 9.3 (8.2–12.6)%, p<0.05). There was no significant difference in time with SpO 2 <80% (0.5 (0.1–1.0)% vs 0.2 (0.1–0.4)%, p=0.061). Long-lasting SpO 2 deviations occurred less frequently during OxyGenie control.