I got an epidural for all three of my births none of them worked as expected
Epidurals can vary widely in effectiveness due to timing, anatomy, catheter issues, and side effects; failure is often multifactorial and not solely anyone's fault.
Inside the search for a universal signature of unconsciousness
Coordinated brain waves organize, carry, combine, and transform information and may underlie consciousness; anesthetics disrupt these wave patterns to produce unconsciousness.