Hyponatraemia
Also: low sodium · SIADH
Hyponatraemia (low blood sodium) is the most common electrolyte abnormality, with many causes. Assessing fluid status and correcting at a safe rate are key to avoiding harm.
The relevant tools and pathways are gathered here.
Calculators & scores
- Sodium Correction Rate in HyponatraemiaFluid / Electrolytes
- Hyponatraemia Cause AlgorithmElectrolyte Disorders
- Hyponatraemia Severity & Correction RateElectrolytes
- Corrected Sodium (Hyperglycaemia)Electrolytes
- MELD-Na ScoreLiver Disease
- MELD-Na Score for Liver CirrhosisHepatology
- Sodium Correction for HyperglycaemiaFluid / Electrolytes
Decision pathways
Drugs
- Sodium Chloride 3% (Hypertonic Saline)Hypertonic Electrolyte Solution — ICP/Hyponatraemia Management
- TolvaptanV2-Receptor Antagonist (Vasopressin Antagonist)
- Potassium chloride with calcium chloride and sodium chlorideCrystalloid IV fluid
- Potassium chloride with calcium chloride sodium chloride and sodium lactateBalanced crystalloid IV fluid
- Potassium chloride with glucose and sodium chlorideIV fluid (mixed)
- Potassium chloride with rice powder, sodium chloride and sodium citrateOral rehydration salts
- Potassium chloride with sodium chlorideIV fluid (potassium + saline)
- Sodium bicarbonate with sodium chlorideAlkalinising IV solution
- Sodium chlorideSaline IV fluid / replacement
- Sodium chloride with glucoseIV fluid (saline + dextrose)
- DemeclocyclineTetracycline antibiotic (with anti-ADH effect)
- Demeclocycline hydrochlorideTetracycline antibiotic / off-label SIADH treatment
Decision support only. These tools are aggregated by topic to aid navigation — always apply clinical judgement and the relevant national or local guideline.