Causes of Hyponatraemia Flowchart for assessment of Hyponatraemia Plasma Osmolality

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• Blood tests
• Electrolyte disturbances
• Syndrome of inappropriate antidiuretic hormone hypersecretion
• Hyponatremia
• Nephrotic syndrome
• Heart failure
• Intravascular volume status
• Hypothyroidism
• Plasma osmolality
• Health
• Medicine
• Syndromes