What instruction should be given to a client scheduled for a mammogram?

The instruction to refrain from using deodorant on the morning of the test is critical for a mammogram because many deodorants contain aluminum particles that can appear on the mammogram images. These particles can create artifacts, which may be misinterpreted as abnormalities, leading to unnecessary additional procedures or anxiety. By advising clients not to use deodorant, healthcare professionals help ensure that the mammogram results are as clear and accurate as possible, allowing for a proper assessment of breast health.

The other suggestions, such as wearing loose clothing or drinking plenty of water, while helpful for comfort or general well-being, do not directly impact the clarity of the mammogram images. Additionally, fasting for 12 hours is not required for a mammogram, as the procedure does not involve ingesting substances that would necessitate abstaining from food or drink.