PMID: 9444839Jan 28, 1998Paper

Dynamic programming approach for newborn's incubator humidity control

IEEE Transactions on Bio-medical Engineering
D BouattouraG Farges

Abstract

The anatomy, physiology, and biochemistry of the human skin have been studied for a long time. A special interest has been shown in the water permeability of the premature infant's skin, which is known to be an important factor in the maintenance of a controlled water and heat balance. The rate of evaporative heat exchange between the skin surface of a very premature infant and the surrounding incubator air may be so high that evaporative heat loss alone may exceed the infant's total metabolic heat production. However, it has been demonstrated in several investigations published in recent years that basal evaporative water loss can be consistently reduced by increasing the ambient humidity. Nevertheless, the passive humidification system (water reservoir) used in most incubators cannot achieve high and steady humidity levels. In this paper, we propose an active humidification system. The algorithm is based on a combination of optimal control theory and dynamic programming approach. The relative-humidity (R.H.) regulation is performed in range of 35-90% at 33 degrees C with small oscillations (+/- 0.5% R.H.) around the reference value (i.e., prescribed R.H.).

References

Jul 1, 1987·Acta paediatrica Scandinavica·T RiesenfeldG Sedin
Mar 1, 1985·Archives of Disease in Childhood·V A Harpin, N Rutter
Jan 1, 1972·Biology of the Neonate·E SulyokG Ryser
Apr 1, 1968·Archives of Disease in Childhood·E N Hey, N P Maurice
Oct 1, 1983·Early Human Development·E F Bell

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Citations

Jul 7, 2011·Advances in Neonatal Care : Official Journal of the National Association of Neonatal Nurses·Heidi L Fidler
Aug 3, 2011·Journal of Biomedical Optics·Xinyong DongChi Chiu Chan

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