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

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.