Final answer:
The nurse prepares a client for placement of internal radiation by providing an indwelling Foley catheter and a tap water enema to avoid excessive bladder and bowel irradiation.
Step-by-step explanation:
The nurse prepares a client for placement of internal radiation by providing an indwelling Foley catheter and a tap water enema for the purpose of avoiding excessive bladder and bowel irradiation. The catheter helps prevent displacement of the implant by draining urine from the bladder, while the enema clears the rectum and colon, reducing the chance of the bowel being exposed to radiation.