Perioperative medicine & outcomes

Agreement of zero-heat-flux thermometry with the oesophageal and tympanic core temperature measurement in patient receiving major surgery

J Clin Monit ComputPublished Diagnostic accuracy study

Performance · Agreement with reference core temperatureResult — go to the resultMean difference −0.03 °C

Authors' conclusion

The zero-heat-flux thermometer is in good agreement with the reference core temperature based on tympanic and oesophagal temperature monitoring in patients undergoing major surgeries, and appears high performance in detecting hypothermia.

Study context

Population
Adults undergoing major non-cardiac surgery under GA1,068 paired temperature sets
Participants
103 adults
Comparison
Zero-heat-flux thermometry vs reference core temperature
Outcome
Agreement of zero-heat-flux with reference core temperature (Bland-Altman) and performance in detecting intraoperative hypothermia
Methodological detailsmethod-comparison, Bland-Altman analysis
  • Method-comparison
  • Bland-Altman analysis

Performance

Agreement with reference core temperature

Mean difference

−0.03 °C

As reported in the abstract

Differences within 0.5 °C
94.5%
Lin's concordance correlation coefficient
0.90 (95%CI 0.89-0.92)

Further findings

OutcomeZero-heat-flux
Detection of hypothermia
Sensitivity82%
Specificity90%

Original publication

Agreement of zero-heat-flux thermometry with the oesophageal and tympanic core temperature measurement in patient receiving major surgery. J Clin Monit Comput. Published 4 October 2023. doi:10.1007/s10877-023-01078-2

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