ClinicalTrials.gg
Enrolling by invitationNCT06855173Updated Mar 3, 2025

Active External Rewarming from Accidental Hypothermia - a Dose-response Pilot Study

An interventional study of Active external rewarming device and Active external rewarming device 2 in Accidental Hypothermia, sponsored by Haukeland University Hospital. Enrolling by invitation at 1 site in Norway. Open to participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-03-03.

Sponsored by Haukeland University Hospital · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Mar 2025, 1 year 8 months ago, but the record still lists the study as enrolling by invitation.
Phase
Not applicable
Study type
Interventional
Enrollment
12
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
All
01

Study summary

The aim of this pilot study is to evaluate if there is a dose-response relationship between the use of active external rewarming devices and core temperature rewarming rate from simulated accidental hypothermia. Volunteer research participants will be cooled in a field laboratory, and they will recieve medications to inhibit shivering, enabeling a drop in core temperature. Subsequently, they will be treated with either one, two or four heating blankets, and analyses will be performed to investigate whether we are able to find a difference between the three groups.

Read the detailed description

The aim of this pilot study is to evaluate if there is a dose-response relationship between the use of active external rewarming devices and core temperature rewarming rate from simulated accidental hypothermia. Volunteer research participants will be cooled in a field laboratory, and they will recieve medications to inhibit shivering, enabeling a drop in core temperature. All participants will be monitored extensively using a trans-nasal esophageal temperature probe, ECG, SpO2, Blood pressure, skin temperature and with subjective scores. After the cooling phase, the participants will be treated with either one, two or four heating blankets assigned in a randomized order, and analyses will be performed to investigate whether we are able to find a difference between the three groups.

02

Conditions studied

  • Accidental Hypothermia

Browse trials for

Keywords

  • hypothermia
  • active external rewarming
03

In context

Hypothermia

449 studies on the registry are indexed under Hypothermia; 54 are open to participants now.

This study's planned enrollment of 12 is below the median of 77 across 328 interventional studies indexed under Hypothermia.

Browse Hypothermia studies →

Lead sponsor

Haukeland University Hospital is the lead sponsor of 284 studies on the registry; 59 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

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

  • Healthy

Exclusion criteria

Exclusion Criteria:

  • Normal
  • Smoking
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Outcomes assessor)
Enrollment
12 participants (estimated)

Study arms

  • Experimental
    One active external rewarming device

    Participants in this group will recieve one active external rewarming device

    Device: Active external rewarming device

  • Experimental
    Two active external rewarming devices

    Participants in this group will recieve two active external rewarming devices

    Device: Active external rewarming device · Device: Active external rewarming device 2

  • Experimental
    Four active external rewarming devices

    Participants in this group will recieve four active external rewarming devices

    Device: Active external rewarming device · Device: Active external rewarming device 2 · Device: Active external rewarming device 3 · Device: Active external rewarming device 4

Interventions

  • DeviceActive external rewarming device

    Electrical heating blanket

  • DeviceActive external rewarming device 2

    Electrical heating blanket

  • DeviceActive external rewarming device 3

    Electric heating blanket

  • DeviceActive external rewarming device 4

    Electric heating blanket

06

What researchers measure

Primary outcomes

  1. Esophageal temperature rewarming rate

    Developement of esophageal temperature during the rewarming phase after cooling. Participants will be shiver-inhibited in this phase of the trial

    Time frame: 1 hour

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: Undecided — Risk of identifiable data due to a low number of participants

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 3, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06855173
Responsible party
Sponsor
First posted
Mar 3, 2025
Start date
Mar 11, 2025 (estimated)
Primary completion
Mar 12, 2025 (estimated)
Completion
Mar 12, 2025 (estimated)
Last update
Mar 3, 2025

Study contacts

Øyvind Thomassen, MD, PhD
study director · Haukeland University Hospital

Oversight

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

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