• Claire Dahyot-Fizelier, Solène Lamarche, Thomas Kerforne, Thierry Bénard, Benoit Giraud, Rémy Bellier, Elsa Carise, Denis Frasca, and Olivier Mimoz.
• 1Surgical and Neuro Intensive Care Units, Surgical Intensive Care and Anesthesiology Department, CHU de Poitiers, Cedex, France.2Medicine and Pharmacy University, University of Poitiers, Poitiers, France.3Inserm U1070, PBS, Poitiers, France.
• Crit. Care Med. 2017 Jul 1; 45 (7): e715-e717.

ObjectivesTo compare accuracy of a continuous noninvasive cutaneous temperature using zero-heat-flux method to esophageal temperature and arterial temperature.DesignProspective study.SettingICU and NeuroICU, University Hospital.PatientsFifty-two ICU patients over a 4-month period who required continuous temperature monitoring were included in the study, after informed consent.InterventionsAll patients had esophageal temperature probe and a noninvasive cutaneous device to monitor their core temperature continuously. In seven patients who required cardiac output monitoring, continuous iliac arterial temperature was collected. Simultaneous core temperatures were recorded from 1 to 5 days. Comparison to the esophageal temperature, considered as the reference in this study, used the Bland and Altman method with adjustment for multiple measurements per patient.Measurements And Main ResultsThe esophageal temperature ranged from 33°C to 39.7°C, 61,298 pairs of temperature using zero-heat-flux and esophageal temperature were collected and 1,850 triple of temperature using zero-heat-flux, esophageal temperature, and arterial temperature. Bias and limits of agreement for temperature using zero-heat-flux were 0.19°C ± 0.53°C compared with esophageal temperature with an absolute difference of temperature pairs equal to or lower than 0.5°C of 92.6% (95% CI, 91.9-93.4%) of cases and equal to or lower than 1°C for 99.9% (95% CI, 99.7-100.0%) of cases. Compared with arterial temperature, bias and limits of agreement were -0.00°C ± 0.36°C with an absolute difference of temperature pairs equal to or lower than 0.5°C of 99.8% (95% CI, 95.3-100%) of cases. All absolute difference of temperature pairs between temperature using zero-heat-flux and arterial temperature and between arterial temperature and esophageal temperature were equal to or lower than 1°C. No local or systemic serious complication was observed.ConclusionsThese results suggest a comparable reliability of the cutaneous sensor using the zero-heat-flux method compared with esophageal or iliac arterial temperatures measurements.

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