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CompletedNCT03368040Updated Mar 29, 2019

Comparison Between Non-invasive Heat-flux and Invasive Core Temperature Monitoring

An observational study in Body Temperature Changes, sponsored by University Hospital, Bonn. Completed at 1 site in Germany. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2019-03-29.

Sponsored by University Hospital, Bonn · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
22
Ages
18 Years and older
Sex
All
01

Study summary

The body core temperature drops during general anesthesia. To maintain homeostasis, patients require warming measures. Different methods to measure body core temperature exist, which are either highly accurate but invasive, or non-invasive but non-accurate. A new monitoring device, Tcore(TM), enables a non-invasive but accurate core temperature assessment.

This study is performed to quantify accuracy and bias of the Tcore system in comparison with the blood temperature, which is the gold standard of core temperature measurement.

02

Conditions studied

  • Body Temperature Changes

Keywords

  • body core temperature
03

In context

Body Temperature Changes

97 studies on the registry are indexed under Body Temperature Changes; 20 are open to participants now.

This study's enrollment of 22 is below the median of 87 across 24 observational studies indexed under Body Temperature Changes.

Browse Body Temperature Changes studies →

Lead sponsor

University Hospital, Bonn is the lead sponsor of 154 studies on the registry; 28 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Patients that undergo major abdominal surgery

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients with invasive femoral artery temperature monitoring

Exclusion criteria

Exclusion Criteria:

  • Pregnancy
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
22 participants (actual)
Patient registry
No

Interventions

  • DeviceTcore

    Monitoring system to measure body temperature based on heat-flux technology

06

What researchers measure

Primary outcomes

  1. Bias of heat-flux temperature monitoring [%]

    Over the time course of surgery, the body core temperature is actually measured in the bloodstream (Tbl) and estimated by the heat-flux thermometer (Thf). The bias or median prediction error (MPE) is calculated as median of PE, which is (Tbl-Thf)/Tbl.

    Time frame: from insertion of thermometers to end of surgery

Secondary outcomes

  1. Inaccuracy of heat-flux temperature monitoring [%]

    Over the time course of surgery, the body core temperature is actually measured in the bloodstream (Tbl) and estimated by the heat-flux thermometer (Thf). The inaccuracy or median absolute prediction error (MAPE) is calculated as median of abs(PE), which is (Tbl-Thf)/Tbl.

    Time frame: from insertion of thermometers to end of surgery

07

Study locations

1 site
  • Dept. of Anaesthesiology and Intensive Care Medicine, University of Bonn
    Bonn, 53105, Germany
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Sep 2016 to primary completion in Jan 2018, 16 months.

Of 16 observational studies under Body Temperature Changes, half reached primary completion within 14 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 45. This study's 16 months is above that.

How these figures are worked out, and which studies are left out of them.

Registered
Jan 24, 2017
First posted
Dec 11, 2017
StartActual
Sep 2016
Primary completionActual
Jan 2018
CompletionActual
Mar 2018
Last update
Mar 29, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 29, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03368040
Responsible party
Martin Soehle (Vice head of Anesthesiology, University Hospital, Bonn) — Principal investigator
First posted
Dec 11, 2017
Start date
Sep 2016
Primary completion
Jan 2018
Completion
Mar 2018
Last update
Mar 29, 2019

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2019. You cannot join it, but the record below documents what was studied.

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Discussion

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