Final answer:
Nurse Tammy should assess Derek for the manifestations of diabetes mellitus including polyuria, blurred vision, and polyphagia.
Step-by-step explanation:
Nurse Tammy should assess Derek for the manifestations of diabetes mellitus including polyuria, blurred vision, and polyphagia.
Polyuria refers to frequent urination, which occurs because high blood glucose levels cause the kidneys to try to eliminate the excess glucose through urine. Blurred vision is also a manifestation of diabetes, as high blood glucose levels can affect the eyes and lead to vision problems. Polyphagia, or increased appetite, may occur as a result of cells not being able to access the glucose in the bloodstream, causing the body to feel starved.