Estimates the APACHE IV total score, acute physiology score, predicted hospital mortality, and expected hospital stay for adult ICU patients.
Enter the admission variables and physiology values. If the patient is mechanically ventilated with FiO2 >=50%, also provide respiratory quotient and atmospheric pressure so the A-a gradient branch can be used. If GCS was not assessed, choose “Yes” for unassessed GCS. When multiple chronic health factors are selected, the calculator preserves the original APACHE IV priority order and only applies the highest-priority chronic condition branch.
Admission variables
Age (years)
years
Hospital stay before ICU (days)
days
Admission source
Readmission
Emergency surgery
Admission diagnosis
This field combines the original medical/postoperative + system + diagnosis cascade into one selectable diagnosis code.
Thrombolysis
Physiology
Temperature (C)
C
Mean arterial pressure (mmHg)
mmHg
Heart rate (/min)
/min
Respiratory rate (/min)
/min
Mechanical ventilation
FiO2 (%)
%
PaO2 (mmHg)
mmHg
PaCO2 (mmHg)
mmHg
Arterial pH
Sodium (mEq/L)
mEq/L
24-hour urine output (mL/24h)
mL/24h
Creatinine (mg/dL)
mg/dL
Urea (mEq/L)
mEq/L
Glucose (mg/dL)
mg/dL
Albumin (g/L)
g/L
Bilirubin (mg/dL)
mg/dL
Hematocrit (%)
%
White blood cell count (x1000/mm3)
x1000/mm3
Glasgow Coma Scale
GCS unassessed
Eye response
Verbal response
Motor response
Optional A-a gradient inputs
Respiratory quotient
Atmospheric pressure (mmHg)
mmHg
Chronic health factors
Chronic renal failure or dialysis
Lymphoma
Cirrhosis
Leukemia or myeloma
Hepatic failure
Immunosuppression
Metastatic tumor
AIDS
Please complete all required fields first.
Important Notice
This resource is intended for educational purposes only and is intended for US healthcare professionals. Healthcare professionals should use independent medical judgment. All decisions regarding patient care must be handled by a healthcare professional and be made based on the unique needs of each patient.