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Objective <p>To determine the insensible water losses (IWL) in preterm infants cared for in incubators with 70% or 90% relative humidity (RH).</p> Study design <p>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.</p> Results <p>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<i>, p</i> = 002). Multivariate linear regression analysis showed that RH has an independent effect on the insensible water loss.</p> Conclusion <p>Extremely preterm infants nursed in incubator with 70% RH have higher IWL than infants nursed in 90% RH.</p>

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

  • 期刊论文

  • 发表日期：

    2025年3月16日

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  • Narendra Dereddy,
  • Deborah Ruth,
  • Jianbin Zhu,
  • Julie Pepe,
  • William Oh

摘要

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.