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Ear zaps may cut opioid need after surgery

NCT ID NCT07633444

Symptom relief Sponsor: Federal University of Bahia 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests if a safe, non-invasive nerve stimulation on the ear can lower pain and the need for strong painkillers after abdominal or urologic surgery. 174 adults will receive either real stimulation at different frequencies or a sham (fake) treatment before and after surgery. Researchers will measure pain, opioid use, nausea, and recovery quality to see if this approach works.

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 174 people

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

Expected to start

Jun 2026

An estimate. Start dates often move.

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 to 59 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: * Adults aged 18 to 59 years. * Undergoing elective abdominal or urologic surgery. * American Society of Anesthesiologists (ASA) physical status I-III. * Able and willing to provide written informed consent. Exclusion Criteria: * History of neurological disorders. * History of psychiatric disorders. * Inability to understand study procedures. * Pregnancy. * Cognitive impairment. * Communication difficulties that interfere with study assessments. * Auricular dermatitis or skin lesions at the stimulation site. * Pre-existing cardiac arrhythmia. * Chronic opioid use. * Implanted electronic medical devices, including pacemakers.

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Conditions

The condition(s) this trial relates to.

agnosia Pain, Postoperative Postoperative Nausea and Vomiting

As listed by the trial registrant

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

Opioid consumption, postoperative Postoperative nausea and vomiting (PONV) Postoperative pain

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

  • Hospital Universitário Professor Edgard Santos, Federal University of Bahia (HUPES-UFBA)

    RECRUITING

    Salvador, Estado de Bahia, 40170-110, Brazil

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