SOFA Score Calculator (Sepsis-3)
Calculate the Sequential Organ Failure Assessment (SOFA) score. Tracks ICU organ dysfunction and Sepsis-3 criteria fulfillment. Supports SI and Conventional units.
About
The Sequential Organ Failure Assessment (SOFA) score is a mortality prediction score that is based on the degree of dysfunction of six organ systems: respiratory, coagulatory, hepatic, cardiovascular, neurological, and renal. It is the operational standard for defining Sepsis under the Sepsis-3 international consensus (2016).
This tool allows for the rapid calculation of the score, handling the complexity of vasopressor dosage logic and PaO2/FiO2 ratio computations. A change in the SOFA score of 2 or more points consequent to an infection defines sepsis. The calculator provides dual-unit support (mg/dL and μmol/L) for international usability.
Formulas
The score ranges from 0 to 24. Points are assigned for worst values in 24 hours.
SOFA = ∑ Score(System0-4)
- Respiratory: Based on PaO2/FiO2 ratio (mmHg).
- Coagulation: Platelet count.
- Liver: Bilirubin level.
- CV: Mean Arterial Pressure (MAP) or Vasopressor dose (dopamine, epinephrine, norepinephrine in μg/kg/min).
- CNS: Glasgow Coma Scale (GCS).
- Renal: Creatinine or Urine Output.
Reference Data
| Score (per system) | Resp (PaO2/FiO2) | Coag (Platelets) | Liver (Bilirubin) | CV (Hypotension) | CNS (GCS) | Renal (Creatinine) |
|---|---|---|---|---|---|---|
| 1 | < 400 | < 150 | 1.2-1.9 mg/dL | MAP < 70 | 13-14 | 1.2-1.9 mg/dL |
| 2 | < 300 | < 100 | 2.0-5.9 mg/dL | Dopamine ≤5 | 10-12 | 2.0-3.4 mg/dL |
| 3 | < 200 | < 50 | 6.0-11.9 mg/dL | Dopamine >5 or Epi/Norepi ≤0.1 | 6-9 | 3.5-4.9 mg/dL |
| 4 | < 100 | < 20 | >12.0 mg/dL | Dopamine >15 or Epi/Norepi >0.1 | <6 | >5.0 mg/dL |