Testing medications to reduce brain pressure during breathing tube placement

When doctors place a breathing tube for surgery, it can temporarily raise pressure in your brain and cause blood pressure spikes—especially risky if you're already very ill. This trial tests four medications—lidocaine, dexmedetomidine, esmolol, and magnesium—to see which one best prevents these harmful changes. Researchers will measure how well each medication protects your brain during this procedure using a simple ultrasound of the optic nerve.

Breathing tube placement triggers a stress response in your body that can be dangerous for patients who are critically ill or at risk of brain swelling. Finding a safe, effective medication to prevent this response could protect vulnerable patients and improve their outcomes.