My sister is an anesthesiologists. She sometimes anesthetize heart or brain surgery patients without putting them to sleep, because they're too old or unhealthy

My sister is an anesthesiologists. She sometimes anesthetize heart or brain surgery patients without putting them to sleep, because they're too old or unhealthy but need the surgery asap. These people normally cannot come back to life from anesthesia, which is just making someone dead by stopping heartbeat and respiratory functions with anesthetic agents and then animating them with machines. So the creepy state of having your heart worked out while you're awake. I believe this is something that can be fully automated by a machine in the future. But she also holds the hand of a child to calm her while preparing her to a scary surgery, or talks to relatives waiting outside of intensive care, sometimes tells people that they lost their loved one, or a miracle just happened and they're good.