Verona, my dh is a nurse, so I know a little about this subject, though I'm sure there are nursey mumsnetters out there somewhere!
My dh works in a day surgery unit where the hours are mostly 8 am -4.45 pm, Mon- Fri. Once a week he has a late shift until 6.30pm, and once a fortnight (approx) a very late shift till 8.15 pm. Our dd goes to nursery full time, and whichever one of us gets out of work first picks her up. Obviously on dh's late nights that's me, and I have to make sure I'm available at a reasonable hour to pick her up. On the other days, it could be either of us- he gets a half day once a week, and some of my sessions are flexible.
Many hospitals now have "Family Friendly" policies, as a means to getting nurses and other health staff back into the workforce, so I suggest you speak to the nursing manager at your local hospital to see what's available. I know a nurse who works part-time, but her hours are spread over term times only, so that she's available for childcare when her kids are off school.This means that effectively she works full-time, but only for term weeks, the rest of the time she is off-duty.
I also know nurses who work night shifts to fit in with their husbands' hours so that one of them is always available for childcare, and I know several work in nursing homes for the same reason.
HTH