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Blood test may spare ER patients from unneeded scans for clots

NCT ID NCT07671300

Knowledge-focused Sponsor: Dr. Kerstin de Wit Source: ClinicalTrials.gov ↗

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jul 10, 2026 · Updated 1 time

Summary

Superficial vein thrombosis (SVT) is a painful but usually harmless blood clot just under the skin. However, about 4% of people develop more serious clots in deep veins or lungs. Current guidelines recommend ultrasound scans to decide if blood thinners are needed, but scans are often only available during the day, leading to multiple ER visits and long waits. This study will review the records of 400 ER patients tested for SVT to see if a simple D-dimer blood test could safely reduce the need for scans. The goal is to gather information for future research.

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 lead to a simple blood test that reduces the need for ultrasound scans in emergency patients with superficial vein thrombosis.
What could go wrong
This is an early exploratory study that only reviews medical records, not a treatment trial. The D-dimer test may not prove accurate enough to replace scans.

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

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jul 2029

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 patient who is tested for superficial vein thrombosis

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: * Aged ≥ 18 * Tested for superficial vein thrombosis in the emergency department or urgent care centre * Patients tested for SVT at all sites, including arms, legs and torso Exclusion Criteria: * Patient opted out of research at the participating site * Patient included in the study in the last 90 days

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Conditions

The condition(s) this trial relates to.

disease thrombophlebitis

As listed by the trial registrant

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

D-dimer Superficial vein thrombosis

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

  • Emergency Medicine

    Kingston, Ontario, K7L 2V7, Canada

More trials for these conditions

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