What indicates a client's understanding of teaching regarding radioactive iodine therapy?

The statement that demonstrates a client's understanding of teaching regarding radioactive iodine therapy is related to the precautions necessary to minimize exposure to others, particularly vulnerable populations such as family members. Using a toilet that is not shared with others shows that the client is mindful of the potential for contamination and the transfer of radiation, which is an important precaution following the administration of radioactive iodine.

This therapy can lead to the excretion of radioactive materials through urine, so the client should limit interactions and the risk of radiation exposure to others, especially for extended periods. By choosing to use a separate toilet, the client is taking proactive steps to protect their family members from unnecessary exposure to radiation during the elimination of the radioactive substance from their body. This understanding reflects appropriate patient education and compliance with safety guidelines post-therapy.