A nurse is reinforcing teaching about preventing long-term complications of retinopathy and neuropathy with an older adult client who has diabetes mellitus. Which of the following actions is the most important for the nurse to include in the teaching?

Choice A reason: Insulin injected into the thigh is not the most rapidly absorbed. The abdomen is the preferred site for insulin injection, as it has the fastest and most consistent absorption rate. The thigh, arm, and butock have slower and more variable absorption rates12.

Choice B reason: The botle of insulin should not be shaken before withdrawing the medication. Shaking can damage the insulin molecules and affect their potency and effectiveness. Instead, the botle should be gently rolled between the palms to mix the insulin evenly13.

Choice C reason: Lantus insulin should not be used immediately before each meal. Lantus is a long-acting insulin that provides a steady basal level of insulin for 24 hours. It should be taken once a day at the same time every day, regardless of meals. Humalog is a rapid-acting insulin that can be used immediately before each meal to cover the postprandial glucose spikes14.

Choice D reason: Unopened vials of insulin should be kept in the refrigerator until needed. This can help preserve their quality and potency until their expiration date. Opened vials of insulin can be kept at room temperature for up to 28 days, depending on the type and brand

Choice A: Ketoacidosis. This is incorrect because ketoacidosis is a complication of hyperglycemia, not hypoglycemia. Ketoacidosis occurs when the body breaks down fat for energy due to insufficient insulin, resulting in the accumulation of ketones and acids in the blood. Ketoacidosis can cause symptoms such as nausea, vomiting, abdominal pain, fruity breath odor, deep and rapid breathing, and altered mental status.

Choice B: Hyperglycemia. This is incorrect because hyperglycemia is a condition of high blood glucose, not low blood glucose. Hyperglycemia can occur due to insufficient insulin, excessive carbohydrate intake, infection, stress, or illness. Hyperglycemia can cause symptoms such as polyuria, polydipsia, polyphagia, blurred vision, fatigue, and headache.

Choice C: Hypoglycemia. This is correct because hypoglycemia is a condition of low blood glucose, which can occur due to excessive insulin, inadequate carbohydrate intake, exercise, alcohol consumption, or medication interactions. Hypoglycemia can cause symptoms such as sweating, tachycardia, palpitations, tremors, hunger, anxiety, confusion, dizziness, weakness, and seizures.

Choice D: Nephropathy. This is incorrect because nephropathy is a complication of chronic hyperglycemia, not acute hypoglycemia. Nephropathy is a kidney disease that results from damage to the small blood vessels and glomeruli in the kidneys due to high blood glucose levels. Nephropathy can cause symptoms such as proteinuria, edema, hypertension, and renal failure.