Renal
Hyponatraemia Workup
European guidelines — assess severity + symptoms, classify by volume status + urine osmolality + sodium, avoid rapid correction (osmotic demyelination).
Source: European Hyponatraemia Guidelines 2014; Renal Association
Step 1 of ~5
info
Assess Severity
Confirm true hyponatraemia (exclude pseudohyponatraemia from hyperlipidaemia, paraproteinaemia; calculate corrected for hyperglycaemia: + 2.4 mmol/L Na for every 5.5 mmol/L glucose >5.5). Severity: mild 130–134 mmol/L; moderate 125–129; severe <125. Symptomatic features: headache, vomiting, confusion, seizures, ↓GCS, coma. URGENT correction only if severe symptoms.
Related
Curated clinical cross-links plus same-class fallbacks.
Drugs
- Sodium Chloride 3% (Hypertonic Saline) · Hypertonic Electrolyte Solution — ICP/Hyponatraemia Management
- Sodium Acid Phosphate Enema · Osmotic / Stimulant Rectal Laxative
- Magnesium citrate with sodium picosulfate · Stimulant + osmotic bowel cleanser
- Thiopental Sodium · Barbiturate Induction Agent
- Sodium Bicarbonate · Alkalising Agent / Electrolyte
- Sodium Nitroprusside · Vasodilator — Nitric Oxide Donor (IV)
Pathways
- Hyperkalaemia Management · UK Kidney Association Guidelines 2020; NICE CKD Guidelines
- Rhabdomyolysis · Renal Association 2018; UpToDate 2024
- Hypocalcaemia (Adult) · Society for Endocrinology
- SIADH (Endocrine Perspective) · European Hyponatraemia Guidelines 2014
- Hepatorenal Syndrome · EASL 2018; ICA 2015
- Acute Kidney Injury (AKI) · KDIGO 2012 / NICE AKI 2019
Decision support only. Always apply local guidelines and clinical judgement.