Sample entropy of oxygen saturation in preterm infants

Area of Science:

• Neonatal Medicine
• Respiratory Physiology
• Biomedical Engineering

Background:

• Bronchopulmonary dysplasia (BPD) is a common respiratory complication in preterm infants.
• Early identification of BPD risk is crucial for timely intervention and improved outcomes.
• Oxygen saturation (SpO2) variability, measured by sample entropy (SampEn), is a potential biomarker for respiratory health in neonates.

Purpose of the Study:

• To investigate if SpO2-SampEn differs between preterm and term infants.
• To determine if SpO2-SampEn can discriminate between preterm infants with and without BPD.
• To explore the temporal changes in SpO2-SampEn in relation to BPD development.

Main Methods:

• SpO2 data were collected for 90 minutes from preterm (<32 weeks gestation) and term infants.
• SpO2-SampEn was calculated at 32 weeks postmenstrual age (PMA), 36 weeks PMA, and at discharge.
• Statistical analysis compared SpO2-SampEn between groups and identified predictors of SampEn.

Main Results:

• Preterm infants exhibited significantly lower SpO2-SampEn compared to term infants.
• Infants who developed BPD had lower SpO2-SampEn at 32 weeks PMA compared to those without BPD.
• Gestational age was the primary predictor of SpO2-SampEn at 32 weeks PMA; differences diminished by 36 weeks PMA.

Conclusions:

• SpO2-SampEn can differentiate between preterm and term infants.
• SpO2-SampEn shows potential for early BPD risk assessment in preterm infants.
• Confounding factors like caffeine therapy and gestational age require consideration when interpreting SpO2-SampEn.