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Can pulse oximeters be trusted? new study puts them to the test

NCT ID NCT06925646

Knowledge-focused Sponsor: Mayo Clinic Source: ClinicalTrials.gov ↗

What the study statuses mean

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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.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 will check how well pulse oximeters measure oxygen levels when blood flow to the hand is increased or decreased. Twenty healthy adults will breathe lower-oxygen air while researchers compare oximeter readings to blood samples. The goal is to see if changes in hand blood flow affect accuracy, especially in people with darker skin.

What this could mean

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

What this could lead to
If successful, this could help make pulse oximeters more accurate for people with different skin tones and blood flow conditions.
What could go wrong
This is a small, early-stage study with only 20 healthy volunteers, so results may not apply to sick patients or real-world 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.

Participants

About 20 people

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

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Oct 2028

An estimate. End dates often move.

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.

Who is studied

The study population will consist of men and women of all races and ethnic backgrounds recruited from faculty and staff of the Mayo Medical Center and from Rochester, MN and surrounding communities.

Ages

18 to 65 years

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: * Healthy adult men and women of all races and ethnic backgrounds recruited from faculty and staff of the Mayo Medical Center and from Rochester, MN and surrounding communities. * Equal number of male and female participants to address potential sex differences in physiology. * We will intentionally recruit subjects with dark skin because of the issues surrounding accuracy of pulse oximetry and skin tone. * Non-smokers * BMIs between 18-30 kg·m-2. * Female subjects will be non-pregnant. * Free of cardiopulmonary diseases or other conditions and/or taking medications that might affect pulse oximeter-based estimates of arterial saturation. * All inclusion and exclusion criteria are at the discretion of the Principal Investigator. * At least 8 of the subjects will have Fitzpatrick Skin Type of IV to VI. Exclusion Criteria: • Children under the age of 18 will not be studied. We will exclude children less than 18 years of age because they are unable to give consent, and because these studies are non-therapeutic.

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As listed by the trial registrant

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

Oxygen saturation

How to take part

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  1. The places running it

    1 site. 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

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Contacts and locations

Locations

  • Mayo Clinic Department of Anesthesiology

    Rochester, Minnesota, 55902, United States

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