How fast
Within 30 minutes
Sooner if anything on the go-now list applies.
Go now if
- K⁺ 6.5 or more
- ECG changes (peaked T, wide QRS, bradycardia)
- Symptoms or AKI
Ask on the phone
- Value, previous value, haemolysed?
- Creatinine; on ACE inhibitor, spironolactone, potassium supplements?
- Has an ECG been done?
Every bleep: the basics
- Name, ward, bed, age, why they're in hospital.
- Full set of obs and the NEWS2 score — and what it was before.
- Resuscitation status (DNACPR / ReSPECT) and ceiling of care.
Ask the nurse to start
- 12-lead ECG now.
- Stop potassium supplements and potassium-raising drugs; cardiac monitor if K⁺ 6.5+.
Call your senior if
- K⁺ 6.5 or more, ECG changes, or anuric AKI.
When you get there
For healthcare professionals, as an aid to clinical judgement — not a substitute for it. Follow your local policy and ask a senior when in doubt.