Etiology and Clinical Features of Patients With Hyponatremia in the Emergency Department: A Cross-sectional Study
Authors' conclusion
Hyponatremia in the emergency department has diverse causes, with overlapping diagnostic criteria for SIAD and related conditions, though treatment strategies vary significantly. Accurate differential diagnosis is crucial to optimizing patient outcomes. Recognizing the range of underlying causes can help clinicians improve treatment strategies for hyponatremia in emergency settings.
Study context
- Population
- ED patients diagnosed with hyponatremia, June 2019–May 2024
- Participants
- 997 patients
- Outcome
- Causes and clinical characteristics of hyponatremia
Main finding
As reported in the abstract
Syndrome of inappropriate antidiuresis (SIAD) (leading cause)
357 cases
35.8%
Cerebral salt wasting
31 cases, 5.8%
Renal salt wasting
23 cases, 3.8%
Mineralocorticoid-responsive hyponatremia of the elderly
17 cases, 1.8%
Observational data: associations, not effects.
Further findings
Determinants of serum sodium
- Serum sodium change per 1-year increase in age
- decreased by 0.14 mmol/L
- Serum sodium change per 1 mg/dL increase in serum uric acid
- increased by 0.125 mmol/L
Differentiating SIAD from other conditions
- Fractional excretion of phosphate and uric acid effectively distinguished SIAD from other conditions
Original publication
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