The registered nurse teaches a nursing student about the nursing implications for older adult clients undergoing an intravenous pyelogram. Which statement should the registered nurse include in the teaching?

"Because this procedure assesses kidney function, there is no need for a bowel prep."

"The purpose of this procedure is to measure kidney size and the glomerular filtration rate."

"After the procedure, monitor urine output because contrast dye increases the risk for kidney failure in older adults."

"Keep the patient NPO after the procedure because during the procedure the patient will receive drugs that affect the gag reflex."