A 40 years old male develops excessive hyperven-tilation. A G reveals pH- 7.5 pCO2 24 mm Hg PO2 88 mm of Hg. True statement is –
**Core Concept**
The question tests the understanding of **respiratory alkalosis**, a condition characterized by an increase in blood pH due to a decrease in carbon dioxide (CO2) levels. This is often caused by **hyperventilation**, where the rate and depth of breathing increase, leading to excessive CO2 elimination.
**Why the Correct Answer is Right**
Given the patient's **hyperventilation**, the decrease in pCO2 (24 mm Hg) and the increase in pH (7.5) are consistent with **respiratory alkalosis**. The body attempts to compensate for this imbalance through various mechanisms, but the primary issue is the reduction of CO2, a key component in maintaining the acid-base balance.
**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, so we cannot assess its correctness.
**Option B:** Not provided, so we cannot assess its correctness.
**Option C:** Not provided, so we cannot assess its correctness.
**Option D:** Not provided, so we cannot assess its correctness.
**Clinical Pearl / High-Yield Fact**
In **respiratory alkalosis**, the initial response to hyperventilation is a decrease in CO2, leading to an increase in pH. This condition can be caused by various factors, including anxiety, panic attacks, or respiratory diseases.
**Correct Answer:** D.