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Blood flow clues may predict pain block success in arm surgery

NCT ID NCT07197281

Knowledge-focused Sponsor: Assiut University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether changes in blood flow can quickly tell doctors if a nerve block has worked for arm surgery. Researchers will measure two blood flow signals in 50 adults before and after the block. If successful, this could help doctors confirm pain relief faster and avoid extra procedures.

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

About 50 people

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

Expected to start

May 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.

Who is studied

Participants are adult patients aged 18-65 years, both male and female, classified as ASA II-VI, and scheduled for elective superficialization procedures (mainly AV fistula superficialization). Patients must be capable of understanding and signing informed consent. Excluded are patients with contraindications to nerve block such as coagulopathy, local infection, allergy to local anesthetics, severe vascular disease, morbid obesity (BMI \>35), severe neurological or psychiatric impairment, or those taking vasopressors or beta-blockers that could alter vascular reactivity.

Ages

18 to 65 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 18-65 years Both genders ASA II-VI classification Undergoing elective upper limb superficialization surgery (e.g., AVF superficialization) Provided written informed consent Exclusion Criteria: * Patient refusal Coagulopathy or bleeding disorders Local infection at injection site Allergy to local anesthetics Use of vasopressors or beta-blockers Severe peripheral vascular disease Morbid obesity (BMI \> 35) Severe neurological or psychiatric disorders

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As listed by the trial registrant

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

End diastolic velocity Perfusion index

How to take part

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  1. 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 ↗

  2. 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.

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