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Ultrasound may outperform human hands in detecting pulse during cardiac arrest

NCT ID NCT04790396

Diagnosis Sponsor: National Taiwan University 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 18, 2026 · Last updated Sep 18, 2026

Summary

During cardiac arrest, rescuers check for a pulse by hand, but studies show this method is often wrong. This trial tests whether a carotid ultrasound in pulsed-wave Doppler mode can detect a pulse more accurately and quickly. Researchers will compare ultrasound findings with manual palpation in adults who arrive at the emergency room with cardiac arrest.

What this could mean

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

Active substance
carotid ultrasound under pulsed-wave Doppler mode
What this could lead to
If it works, this could give resuscitation teams a faster, more reliable way to tell whether a patient in cardiac arrest has a pulse, helping them start or stop chest compressions at the right moment.
What could go wrong
Ultrasound can be hard to use during the chaos of a resuscitation, and the technique may not work for every patient or every operator. The trial is small and only compares the method with manual palpation, so it may not prove that ultrasound changes patient outcomes.

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 50 people

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

Started

Dec 2020

Expected to finish

Dec 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

any patient presenting at ER with cardiac arrest older than 20 years-old, including trauma or non-trauma cardiac arrest, in-hospital or out-of-hospital cardiac arrest

Ages

20 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: * any patient presenting at ER with cardiac arrest older than 20 years-old Exclusion Criteria: * younger than 20 years-old * patient who is pregnant

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Conditions

The condition(s) this trial relates to.

cardiac arrest

As listed by the trial registrant

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

Cardiac arrest

Contacts and locations

Locations

  • National Taiwan University Hospital

    Taipei, 100, Taiwan

More trials for these conditions

Other studies related to the condition(s) this trial covers.