• Crit Care · Jan 2009

    Meta Analysis Comparative Study Clinical Trial

    Infra-red thermometry: the reliability of tympanic and temporal artery readings for predicting brain temperature after severe traumatic brain injury.

    • Danielle Kirk, Timothy Rainey, Andy Vail, and Charmaine Childs.
    • Brain Injury Research Group, School of Translational Medicine, University of Manchester, Salford Royal Foundation Trust, Stott Lane, Salford M6 8HD UK. dani_kirk@hotmail.com
    • Crit Care. 2009 Jan 1; 13 (3): R81R81.

    IntroductionTemperature measurement is important during routine neurocritical care especially as differences between brain and systemic temperatures have been observed. The purpose of the study was to determine if infra-red temporal artery thermometry provides a better estimate of brain temperature than tympanic membrane temperature for patients with severe traumatic brain injury.MethodsBrain parenchyma, tympanic membrane and temporal artery temperatures were recorded every 15-30 min for five hours during the first seven days after admission.ResultsTwenty patients aged 17-76 years were recruited. Brain and tympanic membrane temperature differences ranged from -0.8 degrees C to 2.5 degrees C (mean 0.9 degrees C). Brain and temporal artery temperature differences ranged from -0.7 degrees C to 1.5 degrees C (mean 0.3 degrees C). Tympanic membrane temperature differed from brain temperature by an average of 0.58 degrees C more than temporal artery temperature measurements (95% CI 0.31 degrees C to 0.85 degrees C, P < 0.0001).ConclusionsAt temperatures within the normal to febrile range, temporal artery temperature is closer to brain temperature than is tympanic membrane temperature.

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