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Respiratory water loss and oxygen consumption in newborn infants during phototherapy
Author(s) -
Kjartansson S,
Hammarlund K,
Riesenfeld T,
Sedin G
Publication year - 1992
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.1651-2227.1992.tb12100.x
Subject(s) - medicine , respiratory system , gestational age , anesthesia , incubator , oxygen , carbon dioxide , relative humidity , zoology , pregnancy , chemistry , genetics , physics , organic chemistry , microbiology and biotechnology , biology , thermodynamics
Respiratory water loss was measured together with oxygen consumption (±O 2 ) and carbon dioxide production (±CO 2 ) in 11 full‐term and eight preterm infants (mean gestational age 34 weeks, range 31‐36 weeks) before and during 1 h of phototherapy. The method for determination of respiratory water loss, ±O 2 and ±CO 2 was based on an open flow‐through system with a mass spectrometer for measurement of gas concentrations. All infants were studied naked in an incubator with an ambient relative humidity of 50% and with a controlled environment with respect to temperature and air velocity. The infants were calm during the measurements. Before phototherapy, in term infants respiratory water loss was 4.4 (SD 0.7) mg/kg min and ±O 2 5.9 (0.9) ml/kg min and in preterm infants respiratory water loss was 4.7 (0.8) mg/kg min and ±O 2 6.1 (0.8) ml/kg min. No significant difference was found between values obtained during or after 1 h of phototherapy and those obtained before.