[15N liver function test in underweight infants, hypotrophic at birth]

Area of Science:

• Pediatrics
• Hepatology
• Neonatology

Context:

• Assessing liver function in infants is crucial for early diagnosis and management.
• Traditional serum parameters may not always reflect true hepatic detoxification capacity.
• Non-invasive methods like the [15N]methacetin urine test offer a novel approach to evaluate liver function.

Purpose:

• To evaluate the hepatic detoxification capacities in hypotrophic infants using the [15N]methacetin urine test.
• To compare liver function in hypotrophic infants with patients suffering from severe liver diseases and healthy controls.
• To investigate potential causes of functional liver damage in hypotrophic infants.

Summary:

• Fifty-two infants were studied: 23 hypotrophic, 15 with severe liver disease, and 14 controls.
• Hepatic detoxification was measured using the [15N]methacetin urine test.
• 17 of 23 hypotrophic infants exhibited reduced [15N] elimination rates, comparable to those with severe liver disease, despite normal serum parameters.

Impact:

• Identifies a subset of hypotrophic infants with subclinical liver dysfunction.
• Highlights the limitations of standard serum tests in assessing liver health in this population.
• Suggests the need to explore underlying causes, such as intrauterine malnutrition or postnatal environmental factors, for functional liver damage.