1370 THE MICROENVIRONMENT OF PREMATURE INFANTS UNDER A PLEXIGLASS DOME AND PLASTIC BLANKET

Abstract

We measured air temp (T_a-micro), relative humidity (rh) and air velocity (V) surrounding 6 non-distressed prematures, <11 days old, 28-36 wks, in the thermoneutral zone in a forced convection incubator. Core temperature (T_e), mean skin temperature (T_sk), abdominal heat flux (q) and O₂ consumption (VO₂) were also measured. Results are means at thermal equilibrium:

Under these environmental conditions: (1) the air under the dome or bubble blanket is warmer and less turbulent. (2) rh measurements are confounded by ↑T_a-micro. (3) Abdominal heat flux is reduced and is associated with an increase in T_e and T_sk. (4) VO₂ is reduced when the infants are covered. These data help to clarify the mechanisms and support the use of a heat shield in the management of premature infants.

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