Back to clinical tools

APACHE II Score

Critical careBeta toolThis tool is in beta. It has undergone internal validation but still requires additional testing. Always confirm the data entered and the results obtained before clinical use. It should not be used as the sole basis for clinical decisions.
years
°C
mm Hg
beats/min
breaths/min
fraction
mm Hg
mm Hg
pH
mmol/L
mmol/L
mmol/L
mg/dL
%
×10^3/µL
points
Acute renal failure present
Prior severe organ insufficiency or immunocompromised state

Clinical noticeThis clinical tool supports decision-making and does not replace individual medical assessment.

Context and use

APACHE II = APS + age_points + chronic_health_points, where APS is the sum of point bands for temperature + mean arterial pressure + heart rate + respiratory rate + oxygenation + acid-base + sodium + potassium + creatinine + hematocrit + white blood cells + neurologic score. Oxygenation uses A-aDO2 when FiO2 >= 0.50, otherwise PaO2. Acid-base uses arterial pH, or serum bicarbonate only if no arterial blood gases are available. Neurologic score = 15 - GCS. Creatinine points are doubled when acute_renal_failure is marked true. Age points: <45 = 0, 45-54 = 2, 55-64 = 3, 65-74 = 5, >=75 = 6. Chronic health points: 0 if no qualifying chronic health history; 2 if elective_postoperative with qualifying chronic health history; 5 if nonoperative or emergency_postoperative with qualifying chronic health history.

Pain assessment

Abbey Pain Scale for Dementia Patients

Six-domain observational pain scale for adults with dementia who cannot provide a reliable verbal pain report.

Dementia · Geriatrics
Nutrition and metabolism

Basal Energy Expenditure

Estimates basal energy expenditure in kcal/day using the original Harris-Benedict equations.

Certifications and Compliance

1.1.1 © 2024-2026 Medgical