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Can a simple ultrasound improve rattlesnake bite care?

NCT ID NCT04188899

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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 17, 2026 · Last updated Jul 17, 2026

Summary

This study explores whether emergency doctors can use a portable ultrasound machine to better assess tissue damage from rattlesnake bites. Current methods rely on physical exams, which may miss early changes. The goal is to see if ultrasound can detect injury earlier and help doctors decide when and how much antivenom to give. The study involves 150 adult patients who have been bitten by a rattlesnake.

What this could mean

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

Active substance
point-of-care ultrasound
What this could lead to
If successful, bedside ultrasound could become a standard tool for quickly and accurately assessing rattlesnake bite severity, helping doctors give the right amount of antivenom sooner.
What could go wrong
This is a relatively small, early-stage study focused on diagnosis, not treatment. Ultrasound may not always detect damage that physical exam misses, and results may not apply to all snakebite types.

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 150 people

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

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

Aug 2030

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

Emergency department patients presenting with Rattle snake envenomation

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: * Adult patients (18 years and older) * Both genders * Complaint of snake bite Exclusion Criteria: * If they are unwilling to provide informed consent * Hemodynamically unstable patients (shock respiratory distress, altered mental status, and cardiorespiratory arrest) * All vulnerable patient populations, e.g., children, pregnant patients, prisoners, and patients unable to verbally consent due to cognitive impairment

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

How to take part

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

  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

    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

  • Banner University Medical Center-Tucson

    Tucson, Arizona, 85724, United States