Insulin of choice in a patient with Diabetic ketoacidosis?
**Core Concept**
Insulin therapy is a cornerstone in the management of Diabetic Ketoacidosis (DKA). The choice of insulin is crucial, as it directly affects the rate of correction of hyperglycemia and acidosis. In DKA, the goal is to administer insulin that has a rapid onset of action, allowing for quick correction of hyperglycemia and prevention of further ketoacidosis.
**Why the Correct Answer is Right**
Regular insulin is the insulin of choice in DKA. It has a rapid onset of action, with peak effects occurring within 2-3 hours. This allows for quick correction of hyperglycemia and acidosis. Regular insulin is also less likely to cause hypoglycemia compared to other insulins, as it has a shorter duration of action. The use of regular insulin in DKA is supported by the American Diabetes Association (ADA) and other clinical guidelines.
**Why Each Wrong Option is Incorrect**
**Option A:** NPH (Neutral Protamine Hagedorn) insulin is incorrect because it has a slower onset of action compared to regular insulin, making it less suitable for the acute management of DKA.
**Option B:** Ultralente insulin is incorrect because it has a very slow onset of action, making it unsuitable for the rapid correction of hyperglycemia and acidosis in DKA.
**Option C:** Glargine insulin is incorrect because it has a long duration of action, which can lead to hypoglycemia and is not suitable for the acute management of DKA.
**Clinical Pearl / High-Yield Fact**
In DKA, it is essential to administer insulin along with IV fluids to correct dehydration and electrolyte imbalances. Regular insulin should be administered subcutaneously, but in severe cases, IV insulin may be used under close supervision.
**Correct Answer:** D. Regular insulin