Accuracy of Non-invasive Temperature Measurement in Deep Hypothermia

Status Enrolling by invitation

Clinical Trial Summary

In pre-hospital care, there are few non-invasive thermometers that are proved both robust and accurate. The aim of this study is to investigate the accuracy of a certain ear-canal based thermometer on patients undergoing thoracic surgery in deep hypothermia.

Clinical Trial Description

The study is a prospective cohort study on patients undergoing elective thoracic surgery in deep hypothermia. The goal is to assess the accuracy of non-invasive temperature devices compared to a gold standard representing core temperature.

At the study hospital, Oslo University Hospital Rikshospitalet, patients undergoing thoracic surgery will already have several routes of temperature monitoring as part of standard procedure. Before cardiopulmonary bypass bladder temperature is normally used as a reference for core temperature. After cardiopulmonary bypass is established, temperature is monitored directly in the circulating blood, hence reflecting core temperature.

For measuring the epitympanic temperature we will use the Metraux Epitympanic Thermometer (Walpoth, Galdikas et al. 1994), a nasopharyngeal temperature probe (Mon-a-Therm, General Purpose Temperature Probe 12Fr/Ch, Covidien) and a new transcutaneous device (SpotOn 3M). The temperature will be measured in degrees Celsius. The first reading will be noted just after induction of anaesthesia and compared to the bladder temperature. After cardiopulmonary bypass (CPB) is established and therapeutic hypothermia is induced, the values for both non-invasive and blood temperature will be recorded every minute. After reaching the target temperature according to the blood temperature, we will continue recording the non-invasive temperature until relative similarity is established. The process will be repeated during re-warming. ;

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

Hypothermia

Clinical Trial Details

NCT number	NCT02009059
Study type	Observational
Source	Oslo University Hospital
Contact
Status	Enrolling by invitation
Phase	N/A
Start date	November 2013
Completion date	March 2016

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