What instruction should a nurse include when teaching a client scheduled for a mammogram?

When preparing a client for a mammogram, it's important to provide specific instructions that can ensure the most accurate results. One key instruction is to refrain from using deodorant on the morning of the test. This is because many deodorants contain substances such as aluminum, which can appear on the mammogram images and potentially interfere with the interpretation of the results. This guidance is critical to avoid any excess artifacts that may complicate the assessment of breast tissue.

The other options, while they may seem relevant, do not apply as directly to the preparation for a mammogram. For instance, drinking plenty of water before the test is generally good hydration advice but does not have a specific impact on the imaging process for breast tissue. Wearing a tight-fitting bra may provide comfort but is not a requirement and does not enhance the quality of the mammogram. Scheduling the test during menstruation is not advisable, as breast tissue can be more sensitive during this time, potentially leading to discomfort during the procedure and possibly inaccurate results due to hormonal changes.

Thus, the most critical instruction for a client scheduled for a mammogram is to avoid using deodorant to ensure the clearest images possible for evaluation.