Comment on presentation of this patient.
**Core Concept**
A patient with a diagnosis of diabetic ketoacidosis (DKA) typically presents with a clinical triad of hyperglycemia, metabolic acidosis, and ketosis. This condition arises due to a relative or absolute deficiency of insulin, leading to an increase in counter-regulatory hormones such as glucagon and cortisol, which promote gluconeogenesis and lipolysis.
**Why the Correct Answer is Right**
The patient with DKA presents with symptoms such as polyuria, polydipsia, and weight loss due to hyperglycemia. The metabolic acidosis in DKA is caused by the accumulation of ketone bodies, which are produced by the breakdown of fatty acids in the liver. The presence of ketones in the urine (ketonuria) is a hallmark of DKA. The patient may also exhibit signs of dehydration, such as dry mouth and decreased skin turgor, due to the osmotic diuresis caused by hyperglycemia.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the presentation of DKA. While patients with DKA may exhibit respiratory alkalosis due to hyperventilation, this is not a primary feature of the condition.
**Option B:** This option is incorrect because it does not mention the presence of ketonuria, which is a key diagnostic feature of DKA.
**Option C:** This option is incorrect because it does not accurately describe the clinical presentation of DKA. While patients with DKA may exhibit signs of dehydration, this is not the only feature of the condition.
**Clinical Pearl / High-Yield Fact**
A key clinical pearl to remember is that the presence of ketonuria in a patient with hyperglycemia is highly suggestive of DKA. Additionally, patients with DKA often exhibit a characteristic "fruity" odor to their breath due to the presence of acetone, a volatile ketone body.
**Correct Answer: B. Hyperglycemia, metabolic acidosis, and ketonuria in the setting of dehydration.**