The insulin preparation of choice in diabetic ketoacidosis is
**Core Concept**
The management of diabetic ketoacidosis (DKA) involves the administration of insulin to correct hyperglycemia and ketosis. In DKA, the body's insulin deficiency leads to increased glucose production and gluconeogenesis, resulting in hyperglycemia and ketosis. The insulin preparation of choice should have a rapid onset and short duration of action to facilitate the correction of hyperglycemia and ketosis.
**Why the Correct Answer is Right**
The insulin preparation of choice in DKA is Regular Human Insulin (RHI). Regular insulin has a rapid onset of action, with peak effects occurring within 2-4 hours, which is ideal for correcting hyperglycemia and ketosis in DKA. RHI is also less likely to cause hypoglycemia compared to other insulin preparations, as its onset of action is more predictable.
**Why Each Wrong Option is Incorrect**
**Option A:**
- This option is incorrect as NPH (Neutral Protamine Hagedorn) insulin has a slower onset of action and a longer duration of action, making it less suitable for the rapid correction of hyperglycemia and ketosis in DKA.
**Option B:**
- This option is incorrect as Lente insulin has a slower onset of action and a longer duration of action, similar to NPH insulin, making it less suitable for the rapid correction of hyperglycemia and ketosis in DKA.
**Option D:**
- This option is incorrect as Ultralente insulin has a very slow onset of action and a long duration of action, making it unsuitable for the rapid correction of hyperglycemia and ketosis in DKA.
**Clinical Pearl / High-Yield Fact**
In DKA, it is essential to use an insulin preparation with a rapid onset of action to correct hyperglycemia and ketosis. Regular Human Insulin (RHI) is the preferred choice due to its predictable onset and short duration of action.
**Correct Answer:** . Regular Human Insulin