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Ear zap might slash opioid need after big surgery

NCT ID NCT07260266

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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

Summary

This study tests whether a device that gently stimulates a nerve in the ear can help reduce the amount of strong painkillers (opioids) needed after major abdominal surgery. About 108 adults will receive either the real stimulation or a sham version while in the intensive care unit. Researchers will track opioid use, pain scores, and sleep quality for 24 hours after surgery.

What this could mean

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

Active substance
transcutaneous auricular vagus nerve stimulation (taVNS) device
What this could lead to
If it works, this could offer a non-drug way to manage pain after surgery, potentially reducing opioid use and side effects.
What could go wrong
This is a small, early-stage trial. The effect may be small or no better than a placebo, and results may not apply to all surgeries.

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 108 people

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

Expected to start

Jan 2026

An estimate. Start dates often move.

Expected to finish

Dec 2027

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 85 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: * Age between 18 and 85 years, regardless of gender * ASA physical status classification I-III * Scheduled for elective major abdominal surgery under general anesthesia, with postoperative admission to the AICU for monitoring * Anticipated duration of stay in the AICU is approximately 24 hours Exclusion Criteria: * History of vagus nerve-related diseases (such as vasovagal syncope); * Severe arrhythmias or implanted electronic devices such as pacemakers; * Skin lesions, infections, or deformities at the site of external ear stimulation; * Long-term preoperative use of opioid medications or sedatives; * Allergy to study-related medications;

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Conditions

The condition(s) this trial relates to.

agnosia

As listed by the trial registrant

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

Pain management

How to take part

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  1. 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 ↗

  2. A doctor treating you

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