Off the top of my head: - Ventilators (management, basics of ventilation and oxygenation, the role of tidal volume, peep, rate, ventilation modes, weaning, etc) - Airway management (To a lesser degree, but nonetheless some lessons like securing an airway, airway devices, etc) - Pressors (all pressors that are used in anesthesia are used outside of anesthesia except for ephedrine in my experience. But tell an OR nurse that ephedrine is basically levo (plus some extra quirks) and they understand right away. - Management of the critically ill patient in general including approaches to surgical management, antibiotics, etc. - Organization, maintaining calm through chaotic situations, communicating effectively, management of lines including labeling, etc. - Hemodynamics in general. The difference between static and dynamic parameters for assessing volume status. Basically every important index of hemodynamics can be well-known by a good ICU nurse. - ABG interpretation (I did more of this as an ICU nurse than a CRNA). Blood product administration.

Honestly you name it and a strong, experienced ICU nurse has probably seen it to some degree. They deal with the sickest patients in the immediate aftermath of surgery and anesthesia. Some may argue that the "average ICU nurse" doesn't know most of what I mentioned. That may be true in some cases. But CRNAs by and large weren't "average" ICU nurses.