A gradient layer direct calorimetric study was made on the thermal balance of small for date, appropriate for date and large for date term newborn infants during the first 2 days of life. At ambient temperatures of 28 and 32 °C, the dry and total heat losses per kilogramme body weight were inversely related to body weight. There was a negative correlation between metabolic rate per kilogramme and body weight, whereas in terms of surface area the correlation became positive. A similar tendency without statistical significance was observed at an ambient temperature of 37 °C. In a cool environment (28 °C), a significant positive correlation was found between body weight and ambient or total thermal insulations. Tissue and total insulations were inversely related to the metabolic rate. It was concluded that small for date newborn infants are handicapped not only by the unfavorable surface to mass ratio but also by the limited specific body thermal insulation.
|Number of pages||15|
|Journal||Biology of the Neonate - Foetal and Neonatal Research|
|Publication status||Published - Jan 1 1976|
ASJC Scopus subject areas
- Pediatrics, Perinatology, and Child Health
- Developmental Biology