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Updated: Jan 21, 2026

Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
Published on: October 31, 2025
Transferring preterm infants into an open cot using a heated mattress at ≤ 1400 g
Dimitrios Rallis1, Catherine Longley2, Anup Kage2
1Imperial College Healthcare NHS Trust, Neonatal Unit, London, UK. dimitrios.rallis@nhs.net.
Objective:
The objective of this study is to evaluate the corrected age and weight that infants were transferred into an open cot using a heated mattress, in overall and within the subgroups of early (weight ≤ 1400 g) and standard transfer (weight > 1400 g).
Design:
Retrospective cohort study in a tertiary neonatal unit RESULTS: One hundred and thirty-five preterm infants were analysed. The mean weight of moving into an open cot was 1370 ± 167 g at a corrected age 33 ± 1.8 weeks. Eighty-three infants (61%) were transferred early at a mean weight 1276 ± 98 g compared with 52 infants of standard transfer with a mean weight 1522 ± 141 g. Infants of the early group had higher weight gain, were discharged earlier and had shorter length of stay.
Conclusions:
Stable preterm infants can be safely moved to an open cot at < 33 weeks and weight ≤ 1400 g.
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