When I worked acute care, I noticed that there were three groups of people who were consistently behind:
Everyone gets slammed from time to time, but these three categories were ALWAYS behind. My response varied according to what I saw and what I was asked to do.
I'd always get a pump, whether to replenish IV solution, flush a line, or disconnect. I'd always answer a call light, unless I was in the middle of my own patient care. With the newbies, I'd help them do pretty much anything they asked. With the other two groups, I had to be completely not busy to add to my load. I had coworkers spending 2 out of 12 hours on smoke breaks, and there were days I didn't get a lunch... team work does not flourish in such an environment.