In pediatric patients, what is the most common cause of shock?

• A. Loss of volume due to illness or trauma
• B. Cardiac tamponade
• C. Allergic reaction
• D. Overhydration

Answer: (A)

In pediatric patients, shock most often results from loss of intravascular volume due to illness or trauma. When fluids or blood escape the circulation, preload falls, reducing stroke volume and cardiac output, which compromises tissue perfusion. Dehydration from gastroenteritis or hemorrhage are classic scenarios that rapidly lead to hypovolemic shock in children. While other conditions like severe allergic reactions or cardiac tamponade can cause shock, they are not the typical or most common cause in kids. Overhydration isn’t the usual trigger for shock in this population.