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Postnatal kidney function in children born very low birth weight
Alaleh Gheissari1, Fatemeh Naseri, Hamidreza Pourseirafi
1Isfahan University of Medical Sciences, Isfahan, Iran. gheisari@med.mui.ac.ir
Iranian Journal of Kidney Diseases
|July 17, 2012
Summary
Kidney function maturation in very-low-birth-weight (VLBW) infants is delayed, with impaired tubular and glomerular functions observed at 24 months corrected age. Further studies are needed to determine the exact timeline for kidney maturation in these vulnerable infants.
Area of Science:
- Pediatric Nephrology
- Neonatal Physiology
- Developmental Biology
Background:
- Limited data exist on kidney maturation timelines in very-low-birth-weight (VLBW) infants.
- Assessing kidney function in VLBW infants is crucial for long-term health outcomes.
Purpose of the Study:
- To compare kidney function between VLBW infants and normal birth weight infants.
- To evaluate specific aspects of renal function at 18 to 30 months postconceptional age.
Main Methods:
- A cohort of 23 VLBW infants and 21 normal birth weight infants were studied.
- Exclusion criteria included sepsis, asphyxia, and other significant neonatal conditions.
- Kidney function parameters were assessed at 18-30 months corrected postconceptional age.
Main Results:
- No significant differences in blood pressure were found between groups.
- VLBW infants showed higher urine calcium-creatinine ratio, elevated fractional excretion of magnesium, and a higher renal threshold for phosphate.
- Glomerular filtration rate was lower in VLBW infants compared to controls.
Conclusions:
- VLBW infants exhibit impaired tubular and glomerular kidney function at 24 ± 6 months corrected age.
- Kidney function maturation appears delayed in this population.
- Longitudinal studies are necessary to establish the complete kidney maturation timeline in VLBW infants.
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