I started in nursing when CPR was brand new, brought back to local hospitals by former army docs. Lots of evolution in technique over the years, especially after the heart association discovered that ACLS certification was a dynamite revenue generator. There were years of having to do a perfect tape on Resus-annie, supervised by militant instructors. Then aids came along, and nobody wanted to perform rescue breathing on strangers, resulting in a thriving industry in CPR masks and ventilation shields. But eventually it was concluded that even the shields did not offer protection from bodily fluid aerosolization, so we saw the development of breathless CPR. Over this period, ACLS standards changed as research demonstrated the futility of intracardiac adrenaline, levophed drips, and precordial thumps. Now the algorithms are simpler, the standards less nit-picky, and the outcomes are better.

Feeling old.
Boomer out-
Dance like you have never been hurt, work like no one is watching,love like you don't need the money.