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Evren Technologies Phoenix Logo

conduct a clinical trial to study
vagus nerve stimulation
with the Phoenix device

Facts about PTSD

Learn more about PTSD and Evren Technologies

Why Research VNS?

The vagus nerve is the key component of the parasympathetic branch of the autonomic nervous system, the sympathetic and parasympathetic nervous systems act reciprocally. The vagus nerve is critical in many therapeutic areas due to its beneficial effect in restoring balance in cases where sympathetic activity is abnormally raised or parasympathetic activity is lowered.   


Researchers are investigating:  VNS mechanisms of action, restoration of autonomic balance, laying new neural pathways during tasks, reduction of symptoms and systemic imflammatory responses and much more...

Participate in Phoenix CR Trials 

We are looking for medical clinics, hospitals and research facilities to conduct IRB supported clinical trials for the Phoenix CR device. 

If you are interested in participating and have a PTSD specific protocol, please contact us. We will work with you throughout the entire process to assure that you and your clients are getting the support and care needed for success.


We appreciate all the clinics assisting in this stage of Phoenix CR's FDA approval process. We look forward to the day that we can make this life changing medical device available to the public.

taVNS Research Areas

  • Traumatic Brain Injury

  • PTSD

  • Anxiety

  • Depression

  • Sleep Disruption

  • Adjustment Disorders

  • Fear

  • Cognition and Learning

  • Tinnitus


Phoenix CR
taVNS Research Device

The Phoenix® CR is designed specifically to produce high-quality transcutaneous auricular vagus nerve stimulation (taVNS) data from human clinical trials  

Caution: Investigational Device. Limited by Federal (or United States) Law to Investigational Use.

Evren Technologies Phoenix CR Device

Easy-to-use & Portable

  • No hands needed during stimulation sessions

  • Use the CR device with minimal interruption to your daily life 

  • Only charge once per week!

Fully programmable

  • Design & save custom programs 

  • Adjust stimulation parameters

  • Choose stimulation ports

  • Select when to calibrate  

  • Measure impedence 

  • Track adherence

  • Download data

Impedance Monitoring

  • Monitors resistance to stimulation in real time

  • Ensures proper device usage and optimal stimulation as defined in clinical protocol

CR Device

Evren Technologies Phoenix CR Device

Soft, Conforming Earpiece

  • Made of soft silicone.

  • Available in 3 sizes:

    • Small, Medium and Large

  • Programmable

    • Time

    • Intensity

    • Sham

  • Track usage & adherence

  • Long battery life

Evren Technologies Phoenix CR Earpiece

Clinical Research

  • Assist with protocol development

  • Full training and installation

  • Clinical support

  • IT support for data collection, download and interpretation

  • Repair, maintenance and replacement

Alleviate PTSD symptoms without medications

Evren Launches Phoenix CR for taVNS Researchers

Evren Technologies, an innovator in the field of medical neuromodulation devices, today announced the launch of its pioneering Phoenix CR System, a state-of-the-art transcutaneous auricular vagus nerve stimulator (taVNS) research tool.

 Clinical Trial Contact

Thank you for your interest!

“It’s not a drug that I’m putting in my system and its not something that I’m smoking.  So, if you’re telling me that you can put something in my ear and make me better, sign me up every day of the week!”  


- Andy, from Evren's PTSD Pilot Study 

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