Thermal head wrap for infants

Marks, Keith H; Devenyi, Attila G.; Bello, Margarita E.; Nardis, Elizabeth E; Seaton, John F.; Ultman, James S.

doi:10.1016/s0022-3476(85)80202-x

Cited by 23 publications

(15 citation statements)

References 15 publications

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“…In additional experiments, Stothers found that covering the head with a tubegauze hat did not change dry heat loss and was not of thermal benefit to the newborn. In premature newborns ͑mean body mass, 1906 g͒ clothed with flannelette shirts and covered with blankets, Marks et al 5 showed that at a nursery air temperature of 25.2°C, alterations in dry heat loss were limited to the head region. The dry heat loss from the head decreased by 12.1% when an insulating hat ͑Thinsulate Neonatal Headwrap, 3M, Surgical Products Division, St Paul MN͒ was put in place.…”

Section: Introductionmentioning

confidence: 99%

Head insulation and heat loss in naked and clothed newborns using a thermal mannequin

et al. 2002

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In newborns, large amounts of heat are lost from the head, due to its high skin surface area. Insulating the head (for example, with a hat or bonnet) can be a simple and effective method of reducing dry heat loss. In the present study, we evaluated the safety aspects of insulating the head of low-birth-weight naked or clothed newborns by using a heated mannequin that simulates a low-birth-weight newborn. Experimental conditions (comprising a nude and three clothed setups) were performed in a closed incubator at three different air temperatures (29 degrees C, 32 degrees C, and 34 degrees C) and with and without the head being covered with a bonnet in each case, i.e., 24 experimental conditions in all. The study shows that added clothing elements and insulating the head decreases the total heat loss of the mannequin as a whole. As regards the dry heat exchange from the head, wearing a bonnet decreases the local heat loss by an average of 18.9% in all clothed and thermal conditions. This phenomenon could be at the origin of brain overheating in heavily dressed newborns, when unrestricted heat loss is limited to the face only. Our results suggest that--apart from accidental hypothermia-in order to achieve thermal equilibrium of the body, it is preferable to leave the head unprotected and to increase the level of clothing insulation over the rest of the body.

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Section: Introductionmentioning

confidence: 99%

Head insulation and heat loss in naked and clothed newborns using a thermal mannequin

et al. 2002

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“…Thus, the present results demonstrate that the head is an important vector of heat exchange with the environment. This has been reported in neonates by Marks et al, 14 Stothers, 15 and by Elabbassi et al 16 using dry heat exchange mannequins. In the present study, we confirm this observation for evaporative heat loss: This is a particularly important parameter in natural convection, i.e., when the speed of air circulating inside the incubator is lower than 0.2 m s −1 .…”

Section: Discussionmentioning

confidence: 52%

Assessment of whole body and regional evaporative heat loss coefficients in very premature infants using a thermal mannequin: Influence of air velocity

et al. 2005

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In human adults, experimental assessment of the evaporative heat loss coefficient (h(e)) requires a fully wetted skin surface area implying exposure to severe heat stress. For ethical reasons, this type of experimental situation is impossible to perform on neonates. The aim of the present study was to assess h(e) values in clinical situations for the body as a whole and for the different body segments, in particular, in natural and forced convection and using an anthropomorphic, sweating, thermal mannequin to represent a very small premature neonate (body mass 900 g). Skin hydration (i.e., simulated sweating) was performed by two electronic pumping systems, providing a steady adjustable flow of water to the mannequin surface. Experiments were carried out in a closed-incubator heated to air temperatures of 33 degrees C and 36 degrees C, with air velocities (Va) ranging from 0.01 to 0.7 m s(-1), and with four levels of air relative humidity (40, 50, 60, and 80%). For the body as a whole, h(e)=7 W m(-2) mb(-1) in natural convection, whereas in forced convection h(e) was 11.7, 12.4, and 14.1 W m(-2) mb(-1) for air velocities of 0.2, 0.4, and 0.7 m s(-1), respectively. As far as local h(e) is concerned, our results showed that the relative values of regional water loss in forced convection differ greatly from those observed under still air conditions. Thus, increasing air velocity enhances the heterogeneity in regional skin cooling, which may contribute to the neonate's thermal discomfort.

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“…When evaluating the efficacy of head insulation for premature infants in servocontrolled incubators and radiant warmers, Templeman and Bell (1986) found an increased scalp temperature in infants in incubators compared with a decrease in variability in scalp temperature for infants in radiant warmers. When evaluating the importance of head insulation after weaning, Marks et al (1983) found a significant difference in body temperature in a group of infants with head wraps compared with infants without head insulation. Infants wearing a head wrap had a concomitant decrease in metabolic rate, which with the increase in body temperature, indicates a conservation of energy not seen in the infants without head insulation.…”

Section: Insulationmentioning

confidence: 99%

Transition of the Preterm Infant to an Open Crib

Medoff‐Cooper

1994

Journal of Obstetric, Gynecologic & Neonatal Nursing

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Thermal head wrap for infants

Cited by 23 publications

References 15 publications

Head insulation and heat loss in naked and clothed newborns using a thermal mannequin

Head insulation and heat loss in naked and clothed newborns using a thermal mannequin

Assessment of whole body and regional evaporative heat loss coefficients in very premature infants using a thermal mannequin: Influence of air velocity

Transition of the Preterm Infant to an Open Crib

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