Pediatrics

Initial Oxygen Use for Preterm Newborn Resuscitation: A Systematic Review With Meta-analysis






CONTEXT:

The International Liaison Committee on Resuscitation prioritized to review the initial fraction of inspired oxygen (Fio2) during the resuscitation of preterm newborns.

OBJECTIVES:

This systematic review and meta-analysis provides the scientific summary of initial Fio2 in preterm newborns (<35 weeks’ gestation) who receive respiratory support at birth.

DATA SOURCES:

Medline, Embase, Evidence-Based Medicine Reviews, and Cumulative Index to Nursing and Allied Health Literature were searched between January 1, 1980 and August 10, 2018.

STUDY SELECTION:

Studies were selected by pairs of independent reviewers in 2 stages with a Cohen’s of 0.8 and 1.0.

DATA EXTRACTION:

Pairs of independent reviewers extracted data, appraised the risk of bias (RoB), and assessed Grading of Recommendations Assessment, Development and Evaluation certainty.

RESULTS:

Ten randomized controlled studies and 4 cohort studies included 5697 patients. There are no statistically significant benefits of or harms from starting with lower compared with higher Fio2 in short-term mortality (n = 968; risk ratio = 0.83 [95% confidence interval 0.50 to 1.37]), long-term mortality, neurodevelopmental impairment, or other key preterm morbidities. A sensitivity analysis in which 1 study with a high RoB was excluded failed to reveal a reduction in mortality with initial low Fio2 (n = 681; risk ratio = 0.63 [95% confidence interval 0.38 to 1.03]).

LIMITATIONS:

The Grading of Recommendations Assessment, Development and Evaluation certainty of evidence was very low for all outcomes due to RoB, inconsistency, and imprecision.

CONCLUSIONS:

The ideal initial Fio2 for preterm newborns is still unknown, although the majority of newborns ≤32 weeks’ gestation will require oxygen supplementation.

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