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  • Title: Direct calorimetry for the measurement of heat release in preterm infants: methods and applications.
    Author: Rao M, Koenig E, Li S, Klebanov L, Marino L, Glass L, Finberg L.
    Journal: J Perinatol; 1995; 15(5):375-81. PubMed ID: 8576750.
    Abstract:
    Direct calorimetry is a sensitive and accurate method for the measurement of biologic heat release in humans. At the Children's Medical Center of Brooklyn, State University of New York, we have established direct calorimetry for the measurement of heat release by low birth weight premature infants. We have tested the method and find it to be simple, safe, and accurate. We studied heat release in 10 low birth weight infants on 22 occasions. The smallest infant in the study group weighed 1.43 kg. All the infant underwent direct calorimetry between 1 week and 18 weeks of age. Heat release in the infants ranged from 1.31 kcal/kg/hr. This method of direct calorimetry offers a tool for measuring total metabolic heat release from the first weeks of life in very low birth weight infants to estimate the insensible water losses and to examine the effect of various feeding regimens and disease states on total heat release.
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