Which of the following is the primary acid-base disorder associated with haemorrhagic shock, diabetic ketosis and chronic renal failure?
**Core Concept**
The primary acid-base disorder associated with various clinical conditions can be identified by understanding the underlying pathophysiological mechanisms. **Metabolic acidosis** is a condition characterized by an increase in the plasma levels of acidic substances, often due to increased production or decreased excretion.
**Why the Correct Answer is Right**
In haemorrhagic shock, diabetic ketosis, and chronic renal failure, there is either an increased production of acidic substances (e.g., lactic acid in shock, ketone bodies in diabetic ketosis) or a decreased ability to excrete acids (as in renal failure). This leads to a net increase in hydrogen ions in the blood, causing **metabolic acidosis**. The kidneys play a crucial role in maintaining acid-base balance by excreting excess hydrogen ions.
**Why Each Wrong Option is Incorrect**
**Option A:** Not specified, but typically would not be the primary disorder in these conditions.
**Option B:** Not the primary disorder in these conditions, as **respiratory alkalosis** involves a decrease in CO2 levels due to hyperventilation.
**Option D:** Not the primary disorder, as **metabolic alkalosis** involves a decrease in hydrogen ion concentration.
**Clinical Pearl / High-Yield Fact**
Remember that **metabolic acidosis** is often associated with conditions that either increase acid production or decrease acid excretion, such as diabetic ketosis, lactic acidosis, or renal failure.
**Correct Answer:** D. Metabolic acidosis