Which is following common signs of dehydration in children

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2024

Explanation

Dry mucous membranes are a classic and reliable indicator of fluid volume deficit in children.
As the body loses fluid, it attempts to conserve water, leading to reduced saliva production and noticeable dryness of the mouth and tongue.
This sign is a key component of the clinical assessment for moderate to severe dehydration and is more reliable than skin turgor in some cases.

Option A: Dehydration typically causes tachycardia (an increased heart rate) as an early compensatory mechanism to maintain cardiac output and tissue perfusion when fluid volume is low.
Option B: Hypotension (low blood pressure) is a late and severe sign of dehydration, indicating that the body's compensatory mechanisms are failing and the child is in decompensated shock.
Option C: Children with significant dehydration often present with tachypnea (rapid breathing) or deep, rapid respirations (Kussmaul breathing).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical assessment of dehydration in children as background academic context rather than a clinical decision trigger.
Early recognition of dehydration signs like dry mucous membranes is crucial for timely intervention, preventing progression to severe dehydration and shock.
Nurses must perform a thorough hydration assessment, including checking mucous membranes, skin turgor, capillary refill, and vital signs, especially in children with vomiting or diarrhea.
What if? If the child also had a sunken fontanelle and a capillary refill time greater than 3 seconds, the dehydration would be classified as severe, requiring immediate intravenous (IV) fluid resuscitation rather than just oral rehydration.

How to Approach the Question

First, identify the core concept of the question: 'common signs of dehydration in children'. The keyword is 'common'.
Recall the pathophysiology of dehydration: the body loses fluid and initiates compensatory mechanisms to maintain perfusion.
Evaluate each option based on this pathophysiology. Ask yourself: 'Is this an early/common sign or a late/severe sign?'
Heart rate increases (tachycardia) to compensate, so bradycardia is incorrect.
Blood pressure is maintained until late-stage shock, so hypotension is a severe, not common, sign.
Breathing may become rapid (tachypnea) to compensate for acidosis, so bradypnea is incorrect.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 152-154

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 574-576

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 311-313

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