There's also the difficulty that unexpected things happen, and the anaesthesiologist has to know how to keep a patient alive and well when they do. There are tr

There's also the difficulty that unexpected things happen, and the anaesthesiologist has to know how to keep a patient alive and well when they do. There are tricky genetic conditions such as malignant hyperthermia https://en.wikipedia.org/wiki/Malignant_hyperthermia https://en.wikipedia.org/wiki/Malignant_hyperthermia that can cause serious reactions to certain anaesthetics with no warning.