A nurse is caring for a 6-month-old infant with severe dehyd… | 마이메르시 MyMerci
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Child Health
문제

A nurse is caring for a 6-month-old infant with severe dehydration. Which nursing intervention should be the highest priority?

해설
In severe dehydration, establishing IV access for rapid fluid replacement is the highest priority to prevent cardiovascular collapse. Oral fluids are contraindicated, and monitoring urine output or weight is secondary.
같은 주제 다음 문제A 2-year-old child is brought to the emergency department with a 3-day history of vomiting…

심화 해설


Clinical Priority Setting for Severe Dehydration in Infants

When an infant presents with severe dehydration, the immediate physiological threat is hypovolemic shock due to significant fluid loss. The clinical priority framework dictates that interventions addressing airway, breathing, and circulation (the ABCs) take precedence. In this scenario, the most critical step is to restore circulating volume rapidly. For a 6-month-old infant, severe dehydration represents a life-threatening emergency where the compensatory mechanisms for maintaining cardiac output are already failing. While oral or nasogastric rehydration is a viable strategy for some cases of dehydration, the research by Ayele T et al. highlights that these methods are primarily assessed and utilized for moderate to severe dehydration in settings where intravenous therapy may be delayed or unavailable, and they note it as a cost-effective alternative [1]. However, the standard of care for severe dehydration, particularly when perfusion is compromised, is immediate intravenous access and fluid resuscitation. Establishing IV access directly addresses the circulatory collapse by allowing for the rapid administration of isotonic fluids, which is essential to prevent progression to irreversible shock and end-organ damage. The alternative actions, such as monitoring urine output or weighing the child, are important assessments for ongoing management but are secondary to the critical intervention of restoring intravascular volume. Encouraging oral fluids is contraindicated in a severely dehydrated infant who may have altered mental status or ileus, posing an aspiration risk and being an ineffective route for rapid repletion.
References (research sources)
  • [1]
    Assessment of practices and barriers toward nasogastric tube rehydration for moderate and severe dehydration due to diarrheal disease in under-five children among health centers in Gamo Zone, Ethiopia.Research articleAyele T, Birhanu M, Kassa S, Degualem SM, Wondmagegn H, Temesgen K, Bezie HE, Abayneh T, Gembe M, Andarge BD. (2026) · DOI: 10.1371/journal.pone.0343208

임상 시나리오

Clinical Practice Guide: Resuscitation for Severe Dehydration in Infants

For a 6-month-old infant with severe dehydration, the immediate priority is to restore intravascular volume to prevent hypovolemic shock and end-organ damage. The following steps outline the evidence-based approach to initial resuscitation and ongoing management.

Priority Intervention: IV Access and Fluid Resuscitation
  • Vascular Access: Immediately attempt peripheral IV access. If unsuccessful after 2 attempts or within 90 seconds, proceed to intraosseous (IO) access, which is a rapid and effective alternative in critically ill infants.
  • Initial Fluid Bolus: Administer an isotonic crystalloid solution, such as 0.9% sodium chloride or lactated Ringer's solution. The standard initial bolus is 20 mL/kg, infused rapidly over 5 to 20 minutes.
  • Reassessment and Repeat Boluses: Reassess the infant's heart rate, capillary refill, level of consciousness, and urine output immediately after the bolus. Repeat boluses of 20 mL/kg may be necessary, often up to 60 mL/kg or more in the first hour, guided by clinical response.
  • Caution with Oral Rehydration: Oral or nasogastric rehydration is contraindicated in the initial management of severe dehydration with signs of shock (e.g., altered mental status, delayed capillary refill, hypotension) due to delayed absorption and risk of aspiration.
Ongoing Monitoring and Secondary Assessments
  • Hemodynamic Monitoring: Continuously monitor heart rate, blood pressure, capillary refill time, and level of consciousness to assess response to fluid therapy.
  • Urine Output: Once perfusion is restored, monitor urine output closely (target >1-2 mL/kg/hr in infants) as a key indicator of renal perfusion and fluid status. A urinary catheter may be indicated for strict measurement.
  • Weight Monitoring: Obtain a baseline weight on admission and reweigh the infant daily, not every 8 hours, to accurately calculate fluid deficits and ongoing losses.
  • Electrolyte and Glucose Monitoring: Following initial stabilization, check serum electrolytes, glucose, and renal function, as severe dehydration can cause derangements like hypoglycemia, hypernatremia, or acute kidney injury.
Transition to Maintenance and Rehydration

After shock is corrected and the infant is hemodynamically stable, calculate the total fluid deficit and plan rehydration over 24 to 48 hours. This includes maintenance fluids plus replacement of the remaining deficit, with careful attention to the rate and composition of fluids to avoid complications such as cerebral edema, particularly in cases of hypernatremic dehydration.

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