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Mapping the danger zones: new ultrasound study aims to make vein access safer

NCT ID NCT07556770

Knowledge-focused Sponsor: Asan Medical Center 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 21, 2026 · Updated 1 time

Summary

This study uses ultrasound to measure the distance between the subclavian vein and nearby risky structures like the lung and artery. Researchers will compare two ultrasound probe positions (above vs below the collarbone) and check if arm position changes the safety margins. About 55 adults scheduled for surgery will have a quick, non-invasive scan after falling asleep. The goal is to provide clear anatomical data to help doctors avoid complications when placing central lines.

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

55 people

The number who actually took part.

Started

Apr 2026

Finished

Jun 2026

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

Need for ultrasound-guided vascular access for general anesthesia

Ages

20 to 79 years

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: * Patients requiring ultrasound-guided vascular procedures. * Age between 20 and 79 years. * Patients who have voluntarily provided written informed consent for this clinical study. * American Society of Anesthesiologists (ASA) physical status classification I, II, or III. Exclusion Criteria: * Anatomical variations of the clavicle (e.g., history of clavicle fracture). * Suspected thrombosis at the target site. * Known anatomical abnormalities of the subclavian vein or artery. * Inability to abduct the arm (e.g., due to shoulder joint abnormalities). * Patient refusal to participate.

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As listed by the trial registrant

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

General anesthesia induction for elective surgery Sono guided catheterization

Contacts and locations

Locations

  • Asan Medical Center

    Seoul, 05505, South Korea