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Study aims to slash risky CT scans in trauma patients with a simple decision tool

NCT ID NCT04937868

Knowledge-focused Sponsor: University of California, Los Angeles Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 is developing a decision tool to help doctors identify blunt trauma patients who can safely skip abdominal-pelvic CT scans, avoiding unnecessary radiation and expense. Researchers will collect data from 12,000 patients in the emergency department to find a set of clinical signs that reliably rule out serious injuries. If the tool proves accurate, it could prevent millions of unnecessary scans each year.

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 create a simple checklist that lets doctors safely skip CT scans for many blunt trauma patients, reducing radiation exposure and healthcare costs.
What could go wrong
This is an observational study, not a treatment trial. The tool may not be sensitive enough in practice, or doctors may still choose to scan due to liability concerns.

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 12,000 people

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

Started

Jan 2018

Expected to finish

Jun 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

All blunt injury victims who undergo A/P imaging as part of their ED trauma evaluation. This may include children, the elderly, all races, both sexes, and any other demographic or social groups that may present among blunt injury patients. An individual will become eligible for the study when the treating physician determines that A/P CT imaging is needed for their trauma evaluation. Inclusion or exclusion will not be based on age, gender, pregnancy or child-bearing potential, or racial/ethnic origin.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: Blunt trauma patients who undergo abdominal-pelvic CT imaging during their initial trauma evaluation in the emergency department. Exclusion Criteria: None

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Conditions

The condition(s) this trial relates to.

Abdominal Injuries aortic aneurysm Aortic Dissection Aortic Rupture drug-induced liver injury hip fracture Hip Injuries injury intestinal disorder spinal injury Vascular System Injuries Wounds, Nonpenetrating

As listed by the trial registrant

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

Abdominal injury Aortic dissection Aortic rupture Bowel disease Diaphragm injury Genital hemorrhage Hip injuries Liver injury Lumbar spine injury Pelvic fracture Renal injury Sacral fracture Spleen injury Vascular system injuries

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

  • Ronald Reagan Hospital

    RECRUITING

    Los Angeles, California, 90024, United States

More trials for these conditions

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