NCT07667309 · The University of Texas Health Science Center at San Antonio
The Effects of Stellate Ganglion Block Sleep in U.S. Active Duty Service Members and Veterans Receiving Prolonged Exposure Therapy for PTSD
What this study is about
Participants in this study will have already been enrolled in another research study: Combining Stellate Ganglion Block with Prolonged Exposure for PTSD, NCT05889741. The investigators are using a Sleep Profiler, EEG headband to monitor a participants brainwaves while they sleep to see what effects the Stellate Ganglion Block injection has on their sleep.
View original scientific description
Participants in this study will have already been enrolled in another research study: Combining Stellate Ganglion Block with Prolonged Exposure for PTSD, NCT05889741. The investigators are using a Sleep Profiler, EEG headband to monitor a participants brainwaves while they sleep to see what effects the Stellate Ganglion Block injection has on their sleep. Participants will wear the headband for 3 nights before the injection and then 3 nights after the injection. Participants will also complete self-report questionnaires regarding their sleep prior to the injection and following the injection. Approximately 40 participants will be included in this study. This study is a nested observational study whereby participants in the parent study who elect to participate will have their sleep assessed using the EEG headband device and self-reported sleep measures performed.
Interventions
OTHER
Sleep Profiler Headband
The headband is worn for 3 nights prior to injection and then for a an additional 3 nights after the injection. Efficacy of the headband is not being tested, it is used as a measuring tool.
Primary outcome measures
Total Sleep Time
Time frame: Sleep onset to awakening time (approximately 8 hours)
Time spent asleep from sleep onset to waking time
Wake time after sleep onset
Time frame: Sleep onset to awakening time (approximately 8 hours)
Percentage of time spent awake after sleep onset
Rapid Eye Movement (REM) sleep state
Time frame: Sleep onset to awakening time (approximately 8 hours)
Percentage of sleep time spent in REM
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Ability to provide informed consent and follow study-related instructions.
- Be randomized into the study titled "Combining Stellate Ganglion Block with Prolonged Exposure for PTSD: A Randomized Clinical Trial." NCT05889741
- Indicates willingness to wear the Sleep Profiler sleep monitor and to complete self-report assessments.
Exclusion criteria
- 1\. Pre-existing skin or soft tissue condition that precludes the ability to wear the Sleep Profiler headband.
Where
- Killeen, Texas
- San Antonio, Texas
Collaborators
Trauma Research and Combat Casualty Care Collaborative (TRC4)
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 25, 2026 · Source of record for eligibility and locations