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Insensible weight loss in children under one year of age
Insights
Insensible weight loss in infants is constant during the first year of life. By age one, infants lose 36% of adult insensible weight loss levels.
Area of Science:
- Pediatrics
- Human Physiology
- Infant Nutrition
Background:
- Insensible weight loss (IWL) is a critical physiological parameter in infants.
- Understanding IWL is essential for assessing hydration and metabolic status in early life.
Purpose of the Study:
- To quantify insensible weight loss in breast-fed infants over their first year of life.
- To analyze the components and trends of insensible weight loss in infancy.
Main Methods:
- A non-invasive method utilizing a computerized weighing system was employed.
- 12 healthy, breast-fed infants were monitored throughout their first year.
Main Results:
- Insensible weight loss (IWL) remained constant at approximately 1.9 g/h/kg throughout the first year.
- One-year-old infants exhibited IWL equivalent to 36% of adult levels (360 g/day).
- Insensible water loss constituted 92% of total IWL, with metabolic losses accounting for 8%.
Conclusions:
- Infant insensible weight loss demonstrates a consistent rate during the first year.
- The findings provide valuable data for pediatric fluid and metabolic management.
Abstract:
A selected group of 12 breast-fed infants were studied for insensible weight loss over the first year life. The method used to determine the insensible weight loss was non-invasive and based on a computerized weighing system. Findings indicate that the insensible weight loss in a one-year-old child reaches 36% of the average insensible weight loss reached in adulthood (360 g/day). Furthermore, the insensible weight loss (g/h/kg) was constant at about 1.9 g per kilogram per hour over the first year of life. Insensible weight loss contains two components, insensible water loss (92%) and metabolic losses (8%).