What condition is associated with excessive vomiting?

• A. Respiratory acidosis
• B. Metabolic acidosis
• C. Metabolic alkalosis
• D. Respiratory alkalosis

Answer: (C)

Excessive vomiting is primarily associated with metabolic alkalosis. This condition occurs when the body loses a significant amount of gastric acid due to vomiting, leading to an increase in blood pH. The loss of hydrochloric acid (HCl) from the stomach causes a decrease in hydrogen ion concentration, resulting in a more alkaline state in the body.

When the stomach contents are expelled, electrolytes such as potassium and chloride are also lost, which can further contribute to the alkalotic state. The body compensates for this shift in acid-base balance by various physiological mechanisms, but significant and ongoing vomiting can overwhelm these compensatory processes, resulting in metabolic alkalosis.

Understanding this relationship helps in diagnosing and treating patients experiencing severe vomiting, by recognizing the potential for metabolic alkalosis and addressing both the electrolyte imbalances and the underlying causes of the vomiting. Other conditions listed, such as respiratory and metabolic acidosis, typically arise from different mechanisms and do not directly correlate with excessive vomiting.