Endogenous glucose production from infancy to adulthood: a non-linear regression model

Area of Science:

• Pediatric Endocrinology
• Metabolic Research
• Clinical Chemistry

Background:

• Endogenous glucose production (EGP) is critical for maintaining normoglycemia in children.
• Standard fluid therapy often includes dextrose-based solutions, but their adequacy in meeting glucose demands is unclear.
• Understanding age-related EGP is essential for optimizing nutritional support in pediatric patients.

Purpose of the Study:

• To develop a non-linear regression model for EGP as a function of age in children.
• To compare the glucose provided by standard dextrose-based saline solutions with EGP requirements.
• To assess the potential risks of inadequate glucose supplementation in pediatric care.

Main Methods:

• Constructed a regression model using EGP data from 40 healthy subjects (2.5-54.3 years old).
• Quantified EGP using [6,6-(2)H2] glucose dilution during overnight fasting and normoglycemia.
• Analyzed data with non-linear regression (1-phase exponential decay) and compared with 2.5% and 5% dextrose solutions at maintenance fluid rates.

Main Results:

• Developed the regression model: EGP (mg/kg/min) = 6.50 × 2.72(-0.145 × age (y)) + 1.93.
• 5% dextrose solutions provided 46-55% of required glucose (age 1-18 years).
• 2.5% dextrose solutions provided 23-27% of required glucose (age 1-18 years).

Conclusions:

• An accurate non-linear regression model for age-dependent EGP in children was established.
• Standard dextrose solutions at maintenance rates supply only about 50% or less of the glucose needed to replace EGP.
• Inadequate exogenous glucose can lead to a catabolic state and potential hypoglycemia, particularly in younger children.