title: Additional double-wall roof in single-wall, closed, convective incubators: Impact on body heat loss from premature infants and optimal adjustment of the incubator air temperature.
abstract: Radiant heat loss is high in low-birth-weight (LBW) neonates. Double-wall or single-wall incubators with an additional double-wall roof panel that can be removed during phototherapy are used to reduce Radiant heat loss. There are no data on how the incubators should be used when this second roof panel is removed. The aim of the study was to assess the heat exchanges in LBW neonates in a single-wall incubator with and without an additional roof panel. To determine the optimal thermoneutral incubator air temperature. Influence of the additional double-wall roof was assessed by using a thermal mannequin simulating a LBW neonate. Then, we calculated the optimal incubator air temperature from a cohort of human LBW neonate in the absence of the additional roof panel. Twenty-three LBW neonates (birth weight: 750-1800g; gestational age: 28-32 weeks) were included. With the additional roof panel, R was lower but convective and evaporative skin heat losses were greater. This difference can be overcome by increasing the incubator air temperature by 0.15-0.20°C. The benefit of an additional roof panel was cancelled out by greater body heat losses through other routes. Understanding the heat transfers between the neonate and the environment is essential for optimizing incubators.
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Delanaud
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Pauline
authors.initials: P
authors.lastname: Decima
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Amandine
authors.initials: A
authors.lastname: Pelletier
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Libert
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Erwan
authors.initials: E
authors.lastname: Stephan-Blanchard
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Bach
authors.affiliation: PériTox UM-I 01, UFR de Médecine, Université de Picardie Jules Verne, Amiens, France; Réanimation et Soins Continus Pédiatriques, Pôle Femme-Couple- Enfant, CHU Amiens, Picardie, France. Electronic address: tourneux.pierre@chu-amiens.fr.
authors.forename: Pierre
authors.initials: P
authors.lastname: Tourneux
mesh_terms: D000388:Air; D001833:Body Temperature Regulation; D018481:Convection; D006801:Humans; D007186:Incubators, Infant; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology*; D007363:Intensive Care Units, Neonatal; D010969:Plastics; D013696:Temperature
chemical_list: D010969:Plastics
keywords: Incubator; Infant; Nursing care; Partitional calorimetry; Preterm; Radiant heat exchange; Thermoneutral environment