Differential diagnosis of hyperkalemia: an update to a complex problem

Area of Science:

• Nephrology
• Internal Medicine
• Electrolyte Disorders

Background:

• Hyperkalemia is a prevalent and potentially fatal electrolyte imbalance.
• While symptomatic treatment is straightforward, diagnosis presents challenges.
• Understanding potassium homeostasis is crucial for managing hyperkalemia.

Purpose of the Study:

• To present a pathophysiological approach to the differential diagnosis of hyperkalemia.
• To categorize and analyze the various causes of hyperkalemia.
• To outline key laboratory tests for diagnosing hyperkalemia.

Main Methods:

• Review of pathophysiological mechanisms of potassium homeostasis.
• Categorization and analysis of hyperkalemia etiologies.
• Identification of essential diagnostic laboratory investigations.

Main Results:

• Provides a structured framework for understanding hyperkalemia causes.
• Highlights the importance of a pathophysiological approach for diagnosis.
• Lists critical laboratory tests for differential diagnosis.

Conclusions:

• A systematic, pathophysiological approach aids in diagnosing hyperkalemia.
• Understanding potassium regulation is key to identifying underlying causes.
• Appropriate laboratory testing is essential for effective hyperkalemia management.