Investigating the effects of stellate ganglion block on retinal blood flow

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study examines the impact of stellate ganglion nerve blocks on retinal microcirculation in patients with severe brain injuries, such as subarachnoid and intracerebral hemorrhages. The study aims to understand how this regional anesthesia technique, typically used for pain management, may influence cerebral sympathetic activity and potentially reduce vasospasm. Patients receiving the nerve block as part of their standard care will undergo OCTA scans to assess changes in their retinal microcirculation. The findings could provide insights into the broader implications of sympathetic nervous system modulation in critical neurological conditions.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Age 18 years or older
* Patients receiving the stellate ganglion nerve block for an approved indication, e.g. complex regional pain syndrome

Exclusion Criteria:

* Pregnancy
* Non-English speaking
* Temporary or permanent physical limitation that renders the patient unable to sit up and look inside OCTA device

Where it's running

• UT Southwestern Medical Center
  Dallas, Texas, United States Recruiting

Study contacts

• Principal investigator: Noah Jouett, DO, PhD — University of Texas Southwestern Medical Center
• Study coordinator: Noah Jouett, DO, PhD
• Email: noah.jouett@utsouthwestern.edu
• Phone: 214-645-7011

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.