I am an LPN/LVN. When I worked subacute rehab, I had 15 patients on day shift and 30 patients on night shift. This was with the help of one CNA.
An RN supervisor was present during day shift to perform the occasional task that was not within my scope of practice, such as TPN or giving Lasix via IV push. I still had to round with doctors, take off all orders, do all admissions and discharges, perform wound care, obtain finger stick blood sugars, give insulin injections, pass all oral meds, flush PICC lines, give all IV meds that were not cardioactive, and telephone attending physicians with any changes in conditions.