Treatment of SIADH in Hyponatraemia with Moderately Severe Symptoms
Clinical scenario
Moderately severe symptoms present
This protocol addresses patients with hyponatraemia and moderately severe symptoms in the context of SIADH. Severe symptoms are absent, but the clinical situation requires immediate, structured action.
Why this presentation matters
Hyponatraemia with moderately severe symptoms is a dangerous condition. Prompt identification of the underlying cause and removal of contributing factors are central to safe management in this setting.
Treatment approach — partial overview
Initial management centres on prompt diagnostic assessment and, where possible, stopping medications or other factors that may be contributing to or provoking hyponatraemia. Cause-specific treatment is initiated alongside an immediate intravenous intervention aimed at a controlled correction of serum sodium concentration.
The complete sequenced protocol — including the specific intervention, correction thresholds, and monitoring schedule — is available below.
Clinical target: A controlled rise in serum sodium concentration accompanied by improvement of symptoms, guided by defined correction thresholds.
References
DOI: 10.1530/EJE-13-1020
- Hyponatraemia with moderately severe symptoms is a dangerous condition.
- We recommend starting prompt diagnostic assessment (1D).
- Stop, if possible, medications and other factors that can contribute to or provoke hyponatraemia (not graded).
- We recommend cause-specific treatment (1D).
- We suggest immediate treatment with a single i.v. infusion of 150 ml 3% hypertonic saline or equivalent over 20 min (2D).
- We suggest aiming for a 5 mmol/l per 24-h increase in serum sodium concentration (2D).
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