Copeptin: Utility in Paediatric Patients with Hyponatraemia
Rachel L Boal1, James Hughes1, Debbie Matthews1
1Department of Pediatric Endocrinology, Great North Children's Hospital, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom.
Hormone Research in Paediatrics
|November 23, 2021
Summary
Copeptin levels can help diagnose the cause of hyponatraemia in children, particularly in cases of syndrome of inappropriate antidiuretic hormone and Schaaf-Yang syndrome. While not immediately guiding treatment, copeptin clarifies vasopressin regulation mechanisms.
Area of Science:
- Pediatric Endocrinology
- Clinical Chemistry
- Genetics
Background:
- Copeptin is a biomarker for vasopressin, useful in diagnosing polyuria/polydipsia in children.
- Its role in pediatric hyponatraemia (low sodium) requires further clarification.
Observation:
- Five pediatric cases of hyponatraemia were analyzed.
- Elevated copeptin in four cases suggested syndrome of inappropriate antidiuretic hormone (SIADH).
- One case involved Schaaf-Yang syndrome with variable copeptin levels.
Findings:
- Elevated copeptin (13.7-233 pmol/L) indicated SIADH in most hyponatraemic children.
- Low copeptin ruled out SIADH as a cause of hyponatraemia and oliguria in one patient.
- Schaaf-Yang syndrome showed dysregulated vasopressin with fluctuating copeptin.
Implications:
- Copeptin measurement aids in understanding the pathophysiology of pediatric hyponatraemia.
- It helps differentiate causes like SIADH and genetic conditions.
- While not acutely altering management, it provides crucial diagnostic insight into vasopressin dysregulation.
Keywords:
CopeptinHyponatremiaOsmotic dysregulationSchaaf-Yang syndromeSyndrome of inappropriate antidiuretic hormoneMore Related Videos
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