Insensible water loss in extremely preterm infants cared for in incubators with 70% and 90% relative humidity.

Objective: To determine the insensible water losses (IWL) in preterm infants cared for in incubators with 70% or 90% relative humidity (RH). Study design: This was a single center retrospective study of extremely preterm infants between 22- and 28-weeks gestational ages nursed in 70% and 90% RH. IWL...

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Bibliographic Details
Published in:Journal of Perinatology Vol. 45; no. 11; pp. 1548 - 1552
Main Authors: Dereddy, Narendra, Ruth, Deborah, Zhu, Jianbin, Pepe, Julie, Oh, William
Format: research tables/charts Journal Article
Published: Springer Nature Nov2025
Online Access:View this record in EBSCOhost
Description
Summary:Objective: To determine the insensible water losses (IWL) in preterm infants cared for in incubators with 70% or 90% relative humidity (RH). Study design: This was a single center retrospective study of extremely preterm infants between 22- and 28-weeks gestational ages nursed in 70% and 90% RH. IWL was calculated using a formula that utilized infants' fluid intake, urine output and body weight changes. IWL between the two groups were compared using independent t-test. Multivariate linear regression was used to assess the effects of humidity on IWL after adjusting for confounding variables. Results: IWL was higher in infants nursed in 70% RH when compared with those nursed in 90% RH (47.7 ± 30.3 vs. 28.8 ± 39.6, p = 002). Multivariate linear regression analysis showed that RH has an independent effect on the insensible water loss. Conclusion: Extremely preterm infants nursed in incubator with 70% RH have higher IWL than infants nursed in 90% RH.