Indication
Hyperkalaemia (membrane stabilisation), hypocalcaemia, Mg toxicity, CCB overdose.
Preparation
10 mL of 10% Ca gluconate = 1 g (≈ 2.3 mmol Ca²⁺).
Dilution
Bolus undiluted slow IV over 5–10 min, or in 50–100 mL NS.
Rate
Hyperkalaemia: 10 mL IV; may repeat in 5 min.
Monitoring
- • ECG (T-wave/QRS)
- • Ca level
- • Phosphate
- • Extravasation
Common errors
- • Mixing with bicarbonate or phosphate → precipitate
- • Use Ca chloride only via central line
Pearls
- • Onset within 1–3 min; lasts 30–60 min — definitive K⁺ shift needed
