When you go in, you either listen to report on everyone, or just those pts to whom you're assigned. You may have a LVN or an aide working w/you; hopefully, you'll figure out a game plan and set priorities. The plan has to be flexible to deal w/emergencies, admissions, pts returning from surgery. Discharge teaching is also on the list.
RNs and LVNs do vitals, give meds, change dressings, aides help feeding, toileting, bathing. RNs also do a physical assessment--lungs, heart, abdomen. LVNs and aides need to report significant observations to the RN, like VS that are not normal, dressings that have increased/abnormal drainage.
The RNs kind of have to put everything together--reactions to meds, lab values, and changes in pts condition. S/He needs to be sure all lab tests, X-Rays, scans, etc get done, and all reports there for the doc to review. If there are orders nursing wants (like pain control, skin care, wound care), she might leave a note on teh chart for the doc to see. If possible, she should be there when the MD rounds so she can ask ??s and clarify stuff.
A lot depends on the setting; in critical care, the RN will likely do all the care for the pt., bathing, feeding, toileting, VS, meds, obtaining labs, but she takes care only 1 or 2 pts. I work in NICU; @ least every 3 hours, I assess, vital, change diapers, feed babies; I give meds; help moms breastfeed, do discharge teaching; evaluate the baby's response to her treatment plan. When a sick baby is admitted, he has to be evaluated and treatment started, sometimes before the specialist gets to the bedside. A specially trained RN goes to high risk deliveries so she can resuscitate the baby as soon as s/he is born
Answering call lights, helping families, passing out food trays--everyone should help, unless otherwise occupied.
This is by no means a universal or a complete list of duties.