For every ABC-unstable patient we go 1:1, means the other nurses go up at the same time taking over your load.
Medsurg anywhere from 3:1 to 6:1 depending on available staff.
Peds generally 3:1.
Small surgical cases: task oriented nursing, everyone with available time pitches in, assessment/primary diagnostics ordered by the triage nurse or dedicated ER physician.
In general our patient load is very variable throughout our shift since we are involved in prehospital care as well. So if all other nurses have to go out on prehospital assignments and/or in-hospital codes, the ER falls back on 1 - 2 nurses for everything and everyone. All remaining patients fall under the responsibility of the remaining nurse, including ABC-unstable ones that get dropped off in the mean time. Luckily we have pretty amazing ER docs that will do many of our tasks themselves if we are too busy.