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Randomized Controlled Trial
. 2017 Jul:186:49-56.e1.
doi: 10.1016/j.jpeds.2017.01.057. Epub 2017 Mar 6.

Patterns of Oxygenation, Mortality, and Growth Status in the Surfactant Positive Pressure and Oxygen Trial Cohort

Collaborators, Affiliations
Randomized Controlled Trial

Patterns of Oxygenation, Mortality, and Growth Status in the Surfactant Positive Pressure and Oxygen Trial Cohort

Juliann M Di Fiore et al. J Pediatr. 2017 Jul.

Abstract

Objective: To characterize actual achieved patterns of oxygenation in infants born appropriate vs small for gestational age (SGA) randomized to a lower (85-89%) vs higher (91%-95%) oxygen saturation target in the Surfactant Positive Pressure and Oxygen Trial. To determine the association between achieved oxygen saturation levels and survival in infants born appropriate vs SGA enrolled in the Surfactant Positive Pressure and Oxygen Trial.

Study design: Median oxygen saturation and intermittent hypoxemia events (<80%, 20 seconds-5 minutes) were documented in 1054 infants of 240/7-276/7 weeks of gestation while receiving supplemental oxygen during the first 3 days of life.

Results: Lower target infants who were small for gestational age had the lowest oxygen saturation and highest incidence of intermittent hypoxemia during the first 3 days of life. The lowest quartile of oxygen saturation (≤92%) during the first 3 days of life was associated with lower 90-day survival for both infants born appropriate and SGA. An increased incidence of intermittent hypoxemia events during the first 3 days of life was associated with lower 90-day survival only in infants born SGA.

Conclusion: Lower achieved oxygen saturation during the first 3 days of life was associated with lower 90-day survival in extremely preterm infants. Infants born SGA had enhanced vulnerability to lower oxygen saturation targets as evidenced by lower achieved oxygen saturation and an association between increased intermittent hypoxemia events and lower survival.

Trial registration: ClinicalTrials.gov: NCT00233324.

Keywords: hypoxia; intermittent hypoxemia; oxygen saturation; small for gestational age; supplemental oxygen.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
online. Daily Patterns of oxygenation during the first month of life in AGA and SGA infants enrolled in SUPPORT and randomized to lower (85–89%) or higher (91–95%) oxygen saturation targets including A) Median oxygen saturation, B) Time with hypoxemia (<80%), C) shorter intermittent hypoxemia events (IH) of 20s–1min and D) longer IH of 1–5min. (mean +/− SEM)
Figure 2
Figure 2
Kaplan Meier survival analysis in AGA and SGA infants based on actual achieved patterns of oxygenation during the first three days of life. Group stratifications were based on quartile cutoffs with the lowest quartile compared with all others for median oxygen saturation and the highest quartile compared with all others for time <80% and frequency of IH events. A) Median oxygen saturation, B) % time with hypoxemia (<80%) C) Short IH events of 20sec to 1 minute in duration and D) Long IH events of 1 to 5 minutes in duration.

Comment in

References

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