What physical exam finding is often seen in children with dehydration?

• A. Increase in body temperature
• B. Dry mucous membranes
• C. Bradycardia
• D. Severe hypertension

Answer: (B)

Dry mucous membranes are a classic physical exam finding in children with dehydration. When children are dehydrated, their body's fluid balance is altered, leading to decreased moisture in the tissues, particularly in the mucous membranes of the mouth and throat. This dryness can be observed during a physical examination when the healthcare provider looks at the oral cavity, lips, and tongue.

In a dehydrated child, these tissues may appear cracked, parched, and less vibrant in color compared to a well-hydrated child. This symptom is significant, as it can indicate the severity of dehydration and help guide further assessment and treatment.

In contrast, while an increase in body temperature may occur due to various illnesses or conditions, it is not a specific indicator of dehydration. Bradycardia can be associated with severe dehydration, but it is not a common finding in mild to moderate cases. Severe hypertension is not typically associated with dehydration in children; rather, hypotension is more common in severe cases due to a lack of adequate fluid volume in circulation. Thus, the presence of dry mucous membranes serves as a key sign of dehydration, making it the correct choice.