APACHE II severity score
Based on Knaus WA et al. (1985).
Pogosh offers this calculator when a case matches septic shock. It runs only when you press Calculate.
Decision support for clinicians — review before acting.
References
- Knaus WA, Draper EA, Wagner DP, Zimmerman JE. APACHE II: a severity of disease classification system. Crit Care Med. 1985;13:818-829. Search PubMed
Implementation notes
BUG FIXED 2026-10-11: values falling in the rounding gaps between printed bands (e.g. pH 7.6995, PaO2 70.005, K 3.495, creatinine 1.495, temperature 40.995) threw an error; they now score with the band whose lower bound they have passed (PaO2 > 70 is an exclusive bound). No in-band value changed.
Related calculators
Multiple Organ Dysfunction Score (MODS, Marshall)ABC score (Assessment of Blood Consumption) for massive transfusion in traumaShock index (heart rate ÷ systolic blood pressure)qSOFA (quick SOFA) — Sepsis-3 bedside promptSOFA score (Sequential [Sepsis-related] Organ Failure Assessment)SIRS criteria (systemic inflammatory response syndrome)
Pogosh CDS reads a clinical note and offers the calculators that fit the case. Try it on your own note, browse all calculators, or call them from your software through the API.