Final answer:
The nurse should ask the family about the client's capillary blood glucose level to determine the cause of symptoms like headache, polydipsia, and increased lethargy as these could indicate hyperglycemia in a patient with type 2 diabetes and chronic kidney disease. The Correct Answer is Option.2.
Step-by-step explanation:
To determine the potential problem with a bedridden client who has type 2 diabetes mellitus and chronic kidney disease and is exhibiting symptoms of headache, polydipsia, and increased lethargy, the most important question the nurse should ask the family would be: "What is the client's capillary blood glucose level?"
This question is critical because the client's symptoms could indicate hyperglycemia, which can lead to serious complications if not addressed promptly. Frequent urination (polyuria), excessive thirst (polydipsia), and excessive eating (polyphagia) are classic signs of uncontrolled blood glucose levels. Additionally, clients with diabetic nephropathy might not experience symptoms until significant damage to the kidneys occurs, which could contribute to an increase in blood glucose levels and worsen their overall health condition.