• Can J Anaesth · Dec 2005

    The accuracy of a new infrared ear thermometer in patients undergoing cardiac surgery.

    • Matthias Bock, Uta Hohlfeld, Kristine von Engeln, Peter A Meier, Johann Motsch, and Abel J Tasman.
    • Department of Anesthesiology, University of Heidelberg, Germany. matthias.bock@asbz.it
    • Can J Anaesth. 2005 Dec 1; 52 (10): 1083-7.

    PurposeTo evaluate the equivalency of the prototype of a new infrared ear thermometer (IRT 4000) in comparison to the temperature measurements of a pulmonary artery catheter (PAC) and a continual contact probe on the tympanic membrane.MethodsAfter approval by the local Ethics Committee, 26 (six female and 20 male) patients undergoing elective cardiac surgery were included in a single center open trial. During surgery, temperature measurements were recorded with the IRT 4000 in the left ear, and with a tympanic contact probe in the right ear, as well as with a PAC as reference. Measurements with the infrared ear thermometers and continual PAC values were recorded every six minutes.ResultsThe average temperature measured with the IRT 4000 was 0.08 degrees C above the temperature of the PAC (95% confidence interval from -0.44-0.61 degrees C).ConclusionInfrared ear thermometers 4000 temperature readings accurately reflect body core temperature and correlate well with the invasive PAC. Infrared ear thermometers may present a clinically useful alternative to the pulmonary artery thermometry for the measurement of core temperature in the perioperative setting or in the intensive care unit.

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