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The response to an oral glucose load during convalescence from hypoxia in newborn infants
Insights
Newborn infants, both term and premature, struggle to tolerate oral glucose loads after hypoxia recovery. This poor tolerance is linked to metabolic acidosis and reduced glucose absorption, especially in younger infants.
Area of Science:
- Neonatology
- Pediatric Metabolism
- Hypoxia Research
Background:
- Hypoxia can significantly impact newborn metabolic function.
- Convalescence from hypoxia may alter an infant's ability to process nutrients.
- Understanding glucose tolerance in recovering neonates is crucial for clinical care.
Purpose of the Study:
- To assess the tolerance of oral glucose loads in infants recovering from hypoxia.
- To investigate the metabolic responses to glucose loading in term and premature infants post-hypoxia.
Main Methods:
- Sequential measurement of blood pH, bicarbonate, plasma lactic acid, and plasma glucose.
- Administration of an oral glucose load to term and premature infants during convalescence.
- Analysis of metabolic changes and glucose absorption rates.
Main Results:
- All infants developed metabolic acidosis and lactic acidemia after the oral glucose load.
- Metabolic disturbances were more severe in infants tested early in convalescence or under 10 days old.
- Reduced glucose absorption and a blunted rise in blood sugar were observed in these infants.
Conclusions:
- Newborn infants, regardless of gestational age, exhibit poor tolerance to oral glucose loads during hypoxia recovery.
- Early convalescence and younger age exacerbate metabolic intolerance to glucose in neonates.
- These findings highlight the need for careful nutritional management in hypoxic infants.
Abstract:
The ability to tolerate an oral glucose load during convalescence from hypoxia was studied in four term and 11 premature appropriate-for-gestational-age infants by sequential measurements of the changes occurring in blood pH, bicarbonate, plasma lactic acid, and plasma glucose following an oral glucose load. All infants developed metabolic acidosis and lactic acidemia after the oral glucose load. The maximum fall in blood bicarbonate occurred at 30 minutes, and the maximum rise in plasma lactic acid concentration was attained at 60 minutes. The metabolic changes were found to be more severe in infants given the oral glucose load early in their convalescence and in those infants less than 10 days of age. The absorption of glucose was also decreased in these infants, as shown by a reduced rise in blood sugar. These observations indicate that newborn infants, term or premature, tolerate glucose loads poorly during convalescence from hypoxia.