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Comprehensive Overview of Hypernatremia: Pathophysiology, Diagnosis, and Management
Rahul Mittal1, Angela Man Wai Lai2, Rebecca Coskin3
1Department of Health Informatics, Rutgers School of Health Professions, Piscataway, NJ, USA.
British Journal of Hospital Medicine (London, England : 2005)
|December 24, 2025
Summary
Hypernatremia, an electrolyte imbalance, requires tailored treatment based on onset and severity. Prompt diagnosis and management are key to preventing serious neurological and systemic complications.
Area of Science:
- Nephrology
- Endocrinology
- Critical Care Medicine
Background:
- Hypernatremia, elevated serum sodium, presents significant neurological and systemic risks.
- Understanding aetiology (dehydration, sodium intake, renal issues) is vital for effective management.
- Treatment strategies differ for acute (<48h) versus chronic (≥48h) hypernatremia to prevent complications.
Purpose of the Study:
- To review the pathophysiology, diagnosis, and management of hypernatremia.
- To highlight the importance of personalized treatment based on patient factors and aetiology.
- To discuss current challenges and future research directions in hypernatremia care.
Main Methods:
- Literature review of hypernatremia pathophysiology and clinical guidelines.
- Analysis of treatment approaches for acute and chronic hypernatremia.
- Examination of associated conditions like diabetes insipidus and volume depletion.
Main Results:
- Management requires careful water balance restoration using hypotonic fluids, with close sodium monitoring.
- Personalized care, considering age, comorbidities, and cause, is essential.
- Challenges persist in critically ill patients, with both rapid and slow correction linked to mortality.
Conclusions:
- A multidisciplinary approach is crucial for diagnosing, treating, and preventing hypernatremia complications.
- Further research is needed to refine management, develop biomarkers, and optimize outcomes.
- Effective hypernatremia management ensures safer and more effective patient care.
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