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Oxygen consumption of infants with respiratory distress syndrome
Insights
Newborn infants with respiratory distress syndrome show decreasing oxygen consumption in the first 4 days of life. Oxygen levels at 72 and 96 hours approach those of healthy preterm infants.
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Critical Care
Background:
- Respiratory distress syndrome (RDS) is a common condition in newborn infants.
- Positive end-expiratory pressure (PEEP) is a ventilation strategy used in neonatal care.
- Understanding metabolic demands like oxygen consumption is crucial for managing RDS.
Purpose of the Study:
- To quantify oxygen consumption in newborn infants diagnosed with respiratory distress syndrome.
- To track changes in oxygen consumption during the initial 4 days of life.
- To compare oxygen consumption in RDS infants with healthy preterm infants.
Main Methods:
- Serial measurements of oxygen consumption were performed on 14 infants with RDS.
- Infants received positive end-expiratory pressure support.
- Data were collected at 24, 48, 72, and 96 hours of postnatal age.
Main Results:
- Mean oxygen consumption decreased significantly from 24 hours (8.3 ml/min/kg) to 72 and 96 hours (5.5 and 5.3 ml/min/kg, respectively).
- Oxygen consumption at 72 and 96 hours was comparable to healthy preterm infants.
- A significant correlation (r=0.5, p<0.01) was found between serial oxygen consumption and weight loss.
Conclusions:
- Oxygen consumption in newborn infants with RDS declines substantially in the first 4 days of life.
- Metabolic demands normalize towards those of healthy infants by 72-96 hours.
- Oxygen consumption may serve as a potential indicator of physiological recovery and weight changes in RDS infants.
Abstract:
The objective of this research was to determine the oxygen consumption of newborn infants with respiratory distress syndrome in the first 4 days of life. Serial determinations of oxygen consumption were made in 14 infants with respiratory distress syndrome receiving positive end-expiratory pressures. The mean (+/- SE) oxygen consumption determined at 24, 48, 72, and 96 h postnatal age were 8.3 +/- 0.9, 6.5 +/- 0.8, 5.5 +/- 0.5, and 5.3 +/- 0.6 ml/min/kg, respectively. The level of oxygen consumption at 24 h postnatal age was significantly greater than the levels determined at 48, 72, and 96 h (p less than 0.03). The oxygen levels found at 72 and 96 h of age were comparable to those determined for healthy preterm infants. A linear regression of serial oxygen consumption and weight loss yielded a 'fair' (r = 0.5) correlation with a significant inference (p less than 0.01).