Can a simple ultrasound improve rattlesnake bite care?
NCT ID NCT04188899
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
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About 150 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Aug 2026
An estimate. Start dates often move.
- Expected to finish
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Aug 2030
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Banner University Medical Center-Tucson
Tucson, Arizona, 85724, United States