CompletedNot Applicable

The Effects of Horner's Syndrome Developing After Interscalene Brachial Plexus Block on Autonomic Nervous Activity

South Korea48 participantsStarted 2018-06-18

Plain-language summary

This study evaluates the effects of Horner's syndrome on cardiac autonomic nervous activity after interscalene brachial plexus block. Cardiac autonomic nervous activity and bilateral pupil diameters will be measured in a scotopic light condition, 30 minutes after interscalene brachial plexus block under ultrasound guidance and 15 minutes after the subsequent sitting position.

Who can participate

Age range

20 Years – 60 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * American Society of Anesthesiologists physical status 1 * Arthroscopic shoulder surgery under interscalene brachial plexus block Exclusion Criteria: * Coagulopathy * Infection at the site of brachial plexus block * Peripheral neuropathy or neurologic sequelae on the operative limb * Allergy to local anesthetics or history of allergic shock * Psychiatric diseases * Patient refusal * Difficulty communicating with medical personnel * Arrhythmias * Ischemic heart disease * Hypertension * Diabetes mellitus * Thyroid dysfunction * Conduction abnormalities on electrocardiogram * Electrolyte imbalance * Medications affecting cardiac conduction * Contralateral vocal cord palsy * Contralateral hemidiaphragmatic paresis or paralysis * Contralateral pneumothorax or hemothorax

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Post-sitting sympathetic nervous activity

Timeframe: 15 minutes after the sitting position following interscalene brachial plexus block

Trial details

NCT IDNCT03514342

SponsorDaegu Catholic University Medical Center

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2019-07-01

View on ClinicalTrials.gov More Brachial Plexus Block trials