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Can a simple ultrasound replace CT for detecting dangerous vein narrowing?

NCT ID NCT04871568

Knowledge-focused Sponsor: Skane University Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at how often vein narrowing happens after placing a temporary dialysis catheter in the neck or collarbone area. Researchers want to see if a quick ultrasound can spot this narrowing as well as a CT scan does. About 100 adults who need a dialysis catheter for at least a week will take part. The goal is to find a safer, faster way to check for vein problems without using radiation.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 100 people

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

Started

Nov 2021

Expected to finish

Dec 2026

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.

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: * Adults (18 years of age or older). * In need of a tCDC with an expected treatment time of at least 7 days. * Informed consent. Exclusion Criteria: * Intravenous pacemaker or a PICC-line via right-sided central veins in situ. * Known right-sided CVS. * AV fistula on the right upper extremity. * History of central venous vascular interventions including stents, dilatations and more (but not previous central venous catheterization). * Central venous catheter in the right internal jugular vein or in the right subclavian vein in situ. * Either the right jugular vein or the right subclavian vein unavailable for catheterization due to, e.g., local skin infection, thrombosis or inability to visualize the vein with ultrasound. * Known allergy to iodinated contrast agents. * BMI \>35 kg/m2. * No study physician available for the catheterization.

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As listed by the trial registrant

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

Jugular vein occlusion Subclavian vein stenosis

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

  • Skånes universitetssjukhus

    RECRUITING

    Lund, 22185, Sweden