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Pain study pulled before it even started

NCT ID NCT04756791

Symptom relief Sponsor: Universitair Ziekenhuis Brussel 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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study aimed to compare two ways of numbing the chest after a mastectomy: a targeted nerve block versus direct injection into the surgical area. It was planned for adults aged 18-80 undergoing unilateral mastectomy. However, the trial was withdrawn before enrolling any participants, so no results are available.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ropivacaine
What this could lead to
If it had succeeded, this could have pointed to a better way to manage pain after mastectomy, possibly reducing opioid use.
What could go wrong
The trial was withdrawn before enrolling anyone, so no data exist. Even if run, it was a small, early comparison with uncertain real-world benefit.

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

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Started

Jun 2021

Finished

Dec 2024

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 to 80 years

Sex

Female participants only

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: * Age 18-80 years. * Provision of signed informed consent prior to any study-specific procedure. * Patients who come to preoperative anesthesia consultation for their scheduled unilat-eral mastectomy. Exclusion Criteria: * Age \>80 years * History of chronic pain or drug treatment abuse * Depression, psychiatric morbidity or mal-adaptive coping behavior * Neuropathy * Severe anxiety or other mental ailment, taking drugs affecting their capacity to assess pain * Chronic or acute skin infection of the lateral thorax * Hypersensitivity to ropivacaine * Severe hepatic or renal disease * Refuse to participate to the study * Pregnancy

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Conditions

The condition(s) this trial relates to.

breast cancer lymphedema

As listed by the trial registrant

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

Mastectomy; lymphedema

Contacts and locations

Locations

  • UZ Brussel

    Jette, Brussels Capital, 1090, Belgium

More trials for these conditions

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