What instruction should a nurse provide to a client prior to a radioactive iodine uptake (RAIU) test?

Prior to a radioactive iodine uptake (RAIU) test, it's crucial for the nurse to provide comprehensive instructions to ensure accurate test results and patient safety. One key aspect of this preparation is to confirm that a pregnancy test is conducted before the administration of the radioactive iodine, as iodine can affect a developing fetus. This precaution helps mitigate risks associated with radiation exposure.

Additionally, removing all jewelry or metal around the neck area is important because these items can interfere with the imaging process and may affect the accuracy of the results. Metal can lead to artifacts in imaging and may not allow for optimal visualization of the thyroid gland.

Furthermore, antithyroid medications should typically be withheld for several days before the test, often recommended for 5-7 days, to prevent the medications from interfering with the uptake of radioactive iodine. These medications can suppress the thyroid's ability to absorb iodine, leading to misleading results during the test.

Together, these pre-test instructions—confirming a pregnancy test, removing jewelry, and withholding certain medications—are essential for the safe administration and effectiveness of the RAIU test. Thus, the comprehensive approach reflected in the choice of "all of the above" ensures that patients undergo the procedure with all appropriate precautions in place.