What is the most common cause of pediatric hypovolemic shock worldwide?

• A. Dehydration from diarrhea
• B. Hemorrhage
• C. Burns
• D. Decreased intake of fluids

Answer: (A)

In pediatric hypovolemic shock, the most common global cause is dehydration from diarrheal illness. When a child loses large amounts of water and electrolytes through stools, vomiting, or both, they rapidly exhaust their small fluid reserves. Children have a relatively high body water content and less physiological reserve, so this volume loss quickly lowers preload, reduces cardiac output, and impairs tissue perfusion, leading to shock if fluids aren’t replaced promptly. Diarrheal diseases are widespread in many parts of the world, making dehydration from diarrhea the leading cause of pediatric hypovolemic shock worldwide.

Harmful as it is, hemorrhage and burns are significant causes of hypovolemia but occur less frequently on a global pediatric scale. Decreased intake of fluids contributes to dehydration risk, but it is the actual loss of fluid through diarrhea that most often drives progression to shock in children globally.