This study is looking at how a treatment called Stellate Ganglion Block (SGB) affects sleep in U.S. active duty service members and veterans who are also receiving Prolonged Exposure (PE) therapy for Post-Traumatic Stress Disorder (PTSD). SGB involves an injection of either ropivacaine (active) or saline (sham) near a cluster of nerves in the neck. You would wear a special headband called a Sleep Profiler for three nights before the injection and three nights after to measure your sleep patterns. Researchers will also ask you to complete questionnaires about your sleep. The goal is to see if SGB improves sleep, including total sleep time, how often you wake up, and your REM (Rapid Eye Movement) sleep, and if these sleep improvements help with PTSD. This study is for people aged 18 to 65 who are already participating in another related study (NCT05889741). About 40 people will be included.

Study design

This is an observational study involving about 40 participants. You must already be enrolled in a randomized clinical trial (NCT05889741) that compares active SGB with ropivacaine to sham SGB with saline.

What's involved

You would wear a Sleep Profiler headband for three nights before your SGB injection and for an additional three nights after. You will also complete self-report questionnaires about your sleep before and after the injection.

Compensation

Not stated in the trial record.

Follow-up

Sleep measurements and self-reports are taken around the time of the SGB injection (3 nights before and 3 nights after).

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.