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Comparative Study
Relative humidity under radiant warmers: influence of humidifier and ambient relative humidity.
- J H Seguin.
- Department of Pediatrics, Columbus Children's Hospital, OH 43205, USA.
- Am J Perinatol. 1997 Oct 1; 14 (9): 515-8.
AbstractThe effects of humidifier air temperature and flow, and ambient relative humidity (RH(amb)) on RH and air temperature under a radiant warmer (RW) were determined in stable and unstable conditions, using an infant surrogate. Mean supplemented RH under the RW was 36.3% at 14% RH(amb) and 67.6% at 55% RH(amb). Humidifier temperature of 38 degrees C and air flow of 10 LPM produced highest RHs (74.5% and 43.1% in high and low RH(amb), respectively). RH(amb) was highest in summer and lowest in winter in this midwest U.S. hospital, and could be predicted by calendar date (r = 0.58). Humidification equipment capabilities and limitations must be known when using this method to limit evaporative water loss.
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