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Problem solving in clinical practice: the sick infant with low sodium and high potassium

Yincent Tse1,2, Nidhi Singhal3, Leigh McDonald4

  • 1Department of Paediatric Nephrology, Great North Children's Hospital, Newcastle upon Tyne, UK yincenttse@nhs.net.

Archives of Disease in Childhood. Education and Practice Edition
|February 23, 2020
PubMed

Insights

Sick infants with hyponatraemia and hyperkalaemia require prompt management. This study discusses common causes, immediate treatment, and diagnostic approaches for these electrolyte imbalances in infants.

Area of Science:

  • Pediatric Endocrinology
  • Pediatric Nephrology
  • Clinical Biochemistry

Background:

  • Infants presenting with hyponatraemia (low sodium) and hyperkalaemia (high potassium) pose a diagnostic challenge.
  • Distinguishing between renal and endocrine causes is crucial for appropriate management.
  • These electrolyte disturbances can indicate serious underlying conditions requiring timely intervention.

Purpose of the Study:

  • To present two cases of infants with hyponatraemia and hyperkalaemia.
  • To discuss common underlying pathologies leading to these biochemical findings.
  • To outline the approach to immediate treatment, diagnostic work-up, and long-term management.

Main Methods:

  • Case report presentation of two infants with distinct diagnoses.
  • Review of diagnostic strategies for hyponatraemia and hyperkalaemia in infants.
  • Discussion of management protocols for electrolyte imbalances.

Main Results:

  • Two infants presented with hyponatraemia and hyperkalaemia due to common underlying causes.
  • Initial management focused on stabilizing life-threatening hyperkalaemia.
  • Diagnostic work-up aimed to differentiate between renal and endocrine etiologies.

Conclusions:

  • Prompt recognition and management of hyponatraemia and hyperkalaemia in infants are essential.
  • A systematic approach to diagnosis is necessary to identify underlying renal or endocrine disorders.
  • Effective treatment strategies improve outcomes for affected infants.

Keywords:
aldosteronecongenital adrenal hyperplasiahyperkalaemiahyponatraemianeonatology

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