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New wearable capnograph could revolutionize ambulance monitoring

NCT ID NCT06905613

Knowledge-focused Sponsor: Uppsala University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
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
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested a new wearable capnograph called MARIE in an ambulance setting. The device measures exhaled carbon dioxide and breathing rate. 20 healthy volunteers and 30 patients being transported by ambulance participated. The goal was to see if the device gives reliable readings during transport.

What this could mean

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

Active substance
Wearable capnograph (MARIE) device
What this could lead to
If successful, this could lead to better monitoring of patients during ambulance transport, potentially enabling earlier treatment.
What could go wrong
This is a small, early feasibility study with only 49 participants. The device may not work reliably in real-world conditions, and results may not apply to all patients.

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

49 people

The number who actually took part.

Started

Dec 2024

Finished

Mar 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

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

Accepted

You do not need to have the condition being studied to take part.

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: * 20 healthy volunteers 18-84 years * 30 patients between 18-84 years being transported by ambulance Exclusion Criteria: * Priority 1 ambulance transports * Patients needing oxygen supply * Known pregnancy * Patients unable to provide informed consent

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As listed by the trial registrant

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

Ambulances Technical feasibility

Contacts and locations

Locations

  • Ambulansstationen Uppsala Region

    Uppsala, Uppsala County, 75185, Sweden

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