The nurse would want to avoid ambulating the patient in the room and the hallway for short distances. This is because, for those of you not in the medical profession, a renal biopsy is a kidney biopsy.
That’s gonna hurt, and it’s in an area near the legs. This is going to make it harder to walk without pain, and the kidney is probably going to send pain signals to the brain every time the patient tries to walk.
The best thing for the nurse to do is give this patient some pain medications as needed, encourage fluids since the kidney is a filtration organ (and then some), as well as testing samples for occult blood (or blood in the feces).