APACHE II Critical Illness Score — free guideline decision tool
APACHE II, an ICU severity-of-illness score combining acute physiology, age, and chronic health to estimate in-hospital mortality.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does APACHE II Critical Illness Score do?
Use within 24 h of ICU admission, taking the worst physiologic values, to benchmark severity and estimate group mortality risk.
How is the result calculated?
Acute Physiology Score (12 items) + age points + chronic-health points (0–71); rising totals map to higher predicted mortality (e.g. 0–4 ~4%, 15–19 ~25%, 25–29 ~55%, > 34 ~85%).
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run APACHE II Critical Illness Score now
APACHE II, an ICU severity-of-illness score combining acute physiology, age, and chronic health to estimate in-hospital mortality.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.