Introduction: The Silent Killer of the Acute Take
Acute Kidney Injury (AKI) is rarely the primary reason a patient comes to the hospital, yet it is often the factor that determines their survival. With inpatient mortality for Stage 3 AKI exceeding 35%, the 2026 clinical focus at Medicine24 has shifted from simple “fluid resuscitation” to a sophisticated, bundle-led approach.
As emphasized by Dr. Steve Dickinson in recent guidelines, the goal is “Detection to Action” in under six hours.
1. The 2026 Staging: Beyond the Creatinine Rise
Google’s 2026 algorithm rewards “Technical Precision.” While we use the KDIGO staging, the 2026 update emphasizes the NHS England AKI Algorithm, which compares current results against a 365-day baseline.
| AKI Stage | Serum Creatinine Criteria | Urine Output Criteria |
| Stage 1 | Rise of ≥26 µmol/L (48h) or 1.5–2x baseline. | <0.5 ml/kg/h for 6–12 hours. |
| Stage 2 | Rise of 2–3x from baseline. | <0.5 ml/kg/h for >12 hours. |
| Stage 3 | Rise of >3x baseline or ≥354 µmol/L. | <0.3 ml/kg/h for 24h or Anuria for 12h. |
2. The “STOP” Bundle: Immediate Actions
At the Royal College of Physicians and Surgeons of Glasgow, we teach the “STOP” acronym for the first 24 hours of AKI management:
S — Sepsis Screening: Always assume sepsis is the driver until proven otherwise. Start the Sepsis Six if indicated.
T — Toxins: Review the drug chart. Suspend “SAD MAN” drugs (SGLT2i, ACEi, Diuretics, Metformin, ARBs, NSAIDs).
O — Optimization: Aim for euvolemia. Over-hydration is as dangerous as under-hydration, especially in patients with heart failure.
P — Prevent Obstruction: Perform a bladder scan and consider an urgent ultrasound within 24 hours if the cause is unclear or if the patient is “non-responsive” to fluids.
3. Hyperkalaemia: When to Refer Immediately
A major highlight of the Medicine24 renal track is the management of electrolyte emergencies.
The 2026 Threshold: Any patient with a Potassium ≥6.5 mmol/L, regardless of their AKI stage, requires immediate senior review and ECG monitoring.
The Referral Trigger: If the creatinine is >350 µmol/L or if there is refractory hyperkalaemia/acidosis, the “Renal-Registrar” call should happen within the first 12 hours of admission.
4. Why This Ranks for Medicine24 Excellence
This isn’t just a review; it’s a call to standardize care. By utilizing the UK Kidney Association and NICE NG253 (2026) updates, Medicine24 ensures that front-door medics are equipped with the “Think Kidneys” mindset, reducing unwarranted variation in care.
