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Respiratory Water Loss in Relation to Activity in Fullterm Infants on Their First Day after Birth
Author(s) -
RIESENFELD T.,
HAMMARLUND K.,
SEDIN G.
Publication year - 1987
Publication title -
acta pædiatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/j.1651-2227.1987.tb17259.x
Subject(s) - medicine , respiratory system , relative humidity , carbon dioxide , oxygen , zoology , anesthesia , biology , chemistry , ecology , meteorology , organic chemistry , physics
. Respiratory water loss (RWL), oxygen consumption and carbon dioxide production were measured in ten fullterm infants on their first day after birth, using an open flow‐through system with a mass spectrometer, specially equipped with a water channel, for analysis of gas concentrations. Measurements were made both with the infant asleep and during different levels of motor activity. The ambient temperature was maintained at approximately 32.5°C and the ambient relative humidity at 50%. RWL increased from 4.2±0.7 (SD) mg/kg min when the infant was asleep to 6.3±1.0 mg/kg min when he or she was awake but calm; with increasing activity there was a further increase in RWL. The oxygen consumption increased from 5.4±0.9 (SD) ml/kg min during sleep to 6.9±0.8 (SD) ml/kg min when awake, and also increased further with increasing activity.