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Warming hands may sharpen oxygen readings in ICU patients

NCT ID NCT07792304

Disease control Sponsor: Vastra Gotaland Region Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
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Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
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The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

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Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
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Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
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Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 28, 2026 · Last updated Aug 28, 2026

Summary

Pulse oximeters, which clip onto a finger to estimate blood oxygen levels, can be less accurate when blood flow to the fingers is poor, a common issue in critically ill patients. This trial tests whether warming the hand and lower forearm for 15 minutes improves the accuracy of these readings. Researchers will compare oxygen measurements from the pulse oximeter with those from an arterial blood sample in 240 mechanically ventilated ICU patients with low finger blood flow. Half will receive the warming strategy, and half will receive usual care without warming.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Local warming of the hand and distal forearm to 41-42°C for 15 minutes
What this could lead to
If warming improves pulse oximeter accuracy, it could lead to a simple, low-cost way to get more reliable oxygen readings in critically ill patients, potentially reducing unnecessary interventions or missed low oxygen levels.
What could go wrong
The trial is relatively small and early, and the effect may be modest or not persist. Warming could also cause skin burns or discomfort, and results may not apply to all patients or settings.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 240 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

Dec 2028

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18 years or older. * Admitted to an intensive care unit. * Receiving invasive mechanical ventilation via endotracheal tube or tracheostomy. * Existing arterial catheter placed for a clinical indication. * Objectively verified low peripheral perfusion, defined as finger perfusion index (PFI) \<1.0 at screening. * Stable baseline pulse oximetry signal permitting calculation of the SpO2-SaO2 difference. * Clinical condition considered sufficiently stable to allow study measurements without interfering with ongoing treatment. Exclusion Criteria: * Absence of a stable baseline pulse oximetry signal on all available sensors, preventing calculation of the SpO2-SaO2 difference. * Skin injury, burn, infection, or other local skin condition of the hand or forearm that prevents safe application of the warming pad or pulse oximetry sensor. * Clinical instability for which the treating physician considers study participation likely to interfere with acute treatment or patient safety. * Known hypersensitivity to materials used in the warming pad or sensors. * Participation in another ongoing interventional study that could affect the primary outcome.

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Conditions

The condition(s) this trial relates to.

Critical Illness skin pigmentation disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Critical illness Low peripheral perfusion Pulse oximetry accuracy

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    4 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Kungälvs Sjukhus

    Kungälv, Sweden

  • Norra Älvsborgs Sjukhus

    Trollhättan, Sweden

  • Sahlgrenska University Hospital

    Gothenburg, Sweden

  • Skaraborgs Sjukhus

    Skövde, Sweden

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