A client with type 1 diabetes mellitus (DM) is admitted to the hospital for an emergency cholecystectomy. The client explains to the nurse about experiencing difficulty at home in keeping blood glucose levels under 200 mg/dl (11.1 mmol/L). To prevent the client from developing diabetic ketoacidosis (DKA), which intervention is most important for the nurse to include in the plan of care?

Choice A reason: Obtaining a fingerstick glucose every 6 hours is important for monitoring blood glucose levels and ensuring they are within the target range. However, it is not the most critical intervention for preventing diabetic ketoacidosis. Testing for ketones provides more specific information on the development of DKA. Choice B reason: Ensuring IV fluids are infusing continuously is crucial for maintaining hydration and preventing electrolyte imbalances, particularly in a client who may be at risk for DKA. However, this intervention is supportive and not as directly related to detecting the onset of DKA as testing for ketones. Choice C reason: Testing urine for the presence of ketones is the most important intervention. The presence of ketones indicates that the body is breaking down fat for energy instead of using glucose, which is a hallmark of diabetic ketoacidosis. Early detection of ketones allows for prompt intervention to prevent the progression of DKA. Choice D reason: Teaching the client how to manage sick days is essential for long-term diabetes management and preventing complications during illness. However, for the immediate prevention of DKA in the hospital setting, testing for ketones is more urgent and directly related to detecting and managing the condition.