The NSRI™ measures how well your brain can handle surgery, illness, and life, and what you can do about it before you ever reach the operating room.
Sandra Bargeron, PA-C, CAA, Anesthetist & Brain Health Optimization Expert
Surgery, anesthesia, illness, and chronic stress all push your brain toward a threshold most people don't know exists. The NSRI measures how close you are to it.
The NSRI identifies modifiable factors across 5 domains of brain resilience, backed by 115+ peer-reviewed studies. We don't predict who will decline. We identify what can be strengthened.
Sandra Bargeron is a Certified Anesthesiologist Assistant who saw what standard preoperative screening misses, and built a first-of-its-kind tool to measure it.
Measure your brain's stress-recovery capacity across 5 evidence-based domains. 16–22 minutes. Personalized report.
Start assessment → The BookThe first book to connect neuroinflammation, hormonal shifts, methylation, and gut health to how your brain handles anesthesia.
Get the book → ProgramsFrom group programs to 1:1 intensive support, for anyone ready to build real neurologic resilience, not just get cleared.
See programs → ResearchPeer-reviewed, research-backed articles on perioperative brain health, hormonal resilience, autonomic dysfunction, and more.
Read the blog →Brain-health insights, behind-the-scenes, and the science, straight from Sandra's feed.
