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Smartwatch signals may flag anemia, no needle needed

NCT ID NCT07796542

Diagnosis Sponsor: Peking Union Medical College Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 01, 2026 · Last updated Sep 02, 2026 · Updated 1 time

Summary

Anemia often goes unnoticed because diagnosis requires a blood draw. This study tests whether a wrist-worn smartwatch can identify people likely to have anemia by tracking blood flow, heart rate, oxygen, and movement. About 400 adults, with and without anemia, will wear the watch and also give a blood sample for comparison. Researchers will build a computer model from the watch data and check how well it matches the blood test results.

What this could mean

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

Active substance
A wrist-worn smartwatch that records blood flow, heart rate, oxygen, and movement signals
What this could lead to
If it works, this could offer a non-invasive way to flag possible anemia, helping people seek blood tests earlier.
What could go wrong
The model is still being developed and tested, so it may not be accurate enough. It is a screening tool, not a replacement for blood tests.

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 400 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

Jul 2027

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

Adults aged 18 to 80 years recruited from inpatient wards and outpatient clinics at a single tertiary care hospital in Beijing, China. The population includes both participants with a hospital-confirmed diagnosis of anemia and control participants with hemoglobin within the normal reference range. Anemia is defined according to Chinese sea-level criteria: hemoglobin below 120 g/L in adult men, below 110 g/L in non-pregnant adult women, and below 100 g/L in pregnant women. For participants with anemia, a hemoglobin result obtained within the 3 days and a diagnostic report specifying anemia severity, red blood cell size classification, and anemia type are required. Enrollment targets at least 300 participants with anemia and at least 90 participants with normal hemoglobin. Participants are enrolled consecutively as they present for routine clinical care and meet eligibility criteria.

Ages

18 to 80 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: 1. Age 18 to 80 years, any sex 2. Willing to participate and able to provide written informed consent 3. Able to comply with wearable device wear, venous blood sampling, and functional assessment (e.g., six-minute walk test) 4. For participants with anemia: a hemoglobin test result obtained within 3 days before or after wearable signal acquisition and a hospital diagnostic report, including anemia severity, red blood cell size classification, and anemia type. Anemia is defined according to Chinese sea-level criteria: hemoglobin below 120 g/L in adult men, below 110 g/L in non-pregnant adult women, and below 100 g/L in pregnant women 5. For control participants: hemoglobin within the normal reference range - Exclusion Criteria: 1. Axillary temperature 37.3°C or higher on the day of data collection or on the preceding day 2. Acute exacerbation of a severe comorbid condition (e.g., decompensated heart failure, respiratory failure, acute infection) 3. Skin breakdown, rash, deformity, amputation, or any other condition of the upper limb precluding proper wear of the device 4. Refusal of, or intolerance to, invasive venous blood sampling 5. Concurrent participation in another interventional clinical trial -

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Conditions

The condition(s) this trial relates to.

anemia

As listed by the trial registrant

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

Anemia

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

  • Peking Union Medical College Hospital

    Beijing, Beijing Municipality, 100730, China

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