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Shocking the nerve: can a stimulator make pain blocks better?

NCT ID NCT06566664

Symptom relief Sponsor: Stanford 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
Registered, but not yet taking participants.
By invitation only This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 28, 2026 · Updated 3 times

Summary

This study tests whether adding a nerve stimulator to standard ultrasound guidance improves the quality of nerve blocks for upper limb surgery. 82 adults having elective arm surgery will be randomly assigned to receive the block with or without the stimulator active. Researchers will measure how quickly the block takes effect and how long it lasts.

What this could mean

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

Active substance
B Braun HNS 12 nerve stimulator
What this could lead to
If it works, this could show that using a nerve stimulator alongside ultrasound makes nerve blocks faster and more effective for pain control.
What could go wrong
This is a small, early-stage study at one center. The stimulator is already used for nerve localization, so the benefit may be small or not apply to all patients.

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 150 people

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

Started

Jul 2025

Expected to finish

Jul 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 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: * Undergoing elective upper limb surgery with a planned brachial plexus nerve block Exclusion Criteria: * Under 18 years old * ASA score above III * Chronic pain condition with daily milligrams of morphine equivalent \> 30 * Poorly controlled psychiatric condition * Coagulopathy * Active infection * Moderate, severe or progressing neuropathy * COPD/Chronic oxygen user * Pregnancy * Incarceration * Unable to consent * BMI \> 35 * Pacemaker

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Conditions

The condition(s) this trial relates to.

agnosia somatoform disorder

As listed by the trial registrant

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

Pain management Pain syndrome

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

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    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

  • Stanford University Hospital

    Stanford, California, 94305, United States

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