A nurse is teaching an older adult patient who has diabetes mellitus about preventing the long-term complications of retinopathy and nephropathy. Which of the following instructions should the nurse include?

Choice A rationale Maintaining stable blood glucose levels is the most critical intervention for preventing long-term microvascular complications like retinopathy and nephropathy. Chronic hyperglycemia damages the small blood vessels in the retina and glomeruli of the kidneys. Stable glycemic control minimizes this vascular damage, preserving visual acuity and renal function over time. Choice B rationale Daily foot examinations are crucial for preventing complications like diabetic neuropathy and ulcers, which can lead to infection and amputation. While important for overall diabetes management, this specific action is not directly related to preventing the microvascular damage in the eyes (retinopathy) and kidneys (nephropathy). Choice C rationale Wearing compression stockings is primarily indicated for managing conditions like chronic venous insufficiency or peripheral edema. This action is not a primary intervention for preventing the microvascular damage that causes retinopathy and nephropathy. The long-term complications of diabetes mellitus are linked to glycemic control. Choice D rationale An annual eye examination is a critical component of monitoring for the progression of retinopathy, but it is not a preventive measure. The exam detects existing damage. The instruction to prevent the development or worsening of retinopathy and nephropathy is to maintain stable blood glucose, which addresses the underlying cause of the vascular damage.