What is the SOFA Score?
The Sequential Organ Failure Assessment (SOFA) score is a scoring system to determine the extent of a person’s organ function or rate of failure. It is used to track a patient’s status during the stay in an intensive care unit (ICU) to determine the likelihood of survival.
It consists of 6 key indicators:
- Respiratory system (PaO2/FiO2 ratio)
- Coagulation system (Platelet count)
- Liver (Bilirubin level)
- Cardiovascular system (Blood pressure and use of vasopressors)
- Central nervous system (Glasgow Coma Scale)
- Renal system (Creatinine clearance or urine output)
Each indicator is scored from 0 to 4 based on the degree of abnormality, with a total score ranging from 0 to 24. The higher the score, the more severe the organ dysfunction.
Considerations when using the SOFA Score Calculator:
- It is meant to be used as a reference only and cannot replace the professional judgment of a clinician.
- The score needs to be re-evaluated periodically as the patient’s condition may change over time.
- The score results should be analyzed in the context of the patient’s overall clinical presentation.
- The score may not be suitable for certain specific conditions, such as trauma or burns.
- The actual test results should be used to fill in the corresponding values, rather than relying on estimates.
In summary, the SOFA Score Calculator can provide clinicians with a useful reference, but the final treatment decision should be made by a professional based on a comprehensive assessment of the patient’s specific situation.
How to Use the Calculator
Please enter the following information for the patient:
SOFA Score Reference:
| Parameter | Score | Reference |
|---|---|---|
| Respiration | PaO2/FiO2 > 400 = 0 points PaO2/FiO2 300-400 = 1 point PaO2/FiO2 200-300 = 2 points PaO2/FiO2 100-200 = 3 points PaO2/FiO2 < 100 = 4 points | This measures the ratio of arterial oxygen partial pressure (PaO2) to fractional inspired oxygen (FiO2). A lower ratio indicates more severe respiratory dysfunction. |
| Coagulation | Platelets > 150,000 = 0 points Platelets 100,000-150,000 = 1 point Platelets 50,000-100,000 = 2 points Platelets 20,000-50,000 = 3 points Platelets < 20,000 = 4 points | This measures the platelet count. A lower platelet count indicates more severe coagulation dysfunction. |
| Liver | Bilirubin < 1.2 mg/dL = 0 points Bilirubin 1.2-1.9 mg/dL = 1 point Bilirubin 2.0-5.9 mg/dL = 2 points Bilirubin 6.0-11.9 mg/dL = 3 points Bilirubin > 12.0 mg/dL = 4 points | This measures the bilirubin level. A higher bilirubin level indicates more severe liver dysfunction. |
| Cardiovascular | MAP ≥ 70 mmHg = 0 points MAP < 70 mmHg = 1 point Dopamine ≤ 5 or dobutamine (any dose) = 2 points Dopamine > 5 or epinephrine ≤ 0.1 or norepinephrine ≤ 0.1 = 3 points Dopamine > 15 or epinephrine > 0.1 or norepinephrine > 0.1 = 4 points | This measures the cardiovascular dysfunction, based on hypotension (low blood pressure). |
| Central Nervous System | GCS = 15 = 0 points GCS 13-14 = 1 point GCS 10-12 = 2 points GCS 6-9 = 3 points GCS < 6 = 4 points | This measures the central nervous system dysfunction, based on the Glasgow Coma Scale (GCS). |
| Renal | Creatinine < 1.2 mg/dL = 0 points Creatinine 1.2-1.9 mg/dL = 1 point Creatinine 2.0-3.4 mg/dL = 2 points Creatinine 3.5-4.9 mg/dL = 3 points Creatinine > 5.0 mg/dL = 4 points Urine output < 500 mL/day = 4 points | This measures the renal dysfunction, based on creatinine level or urine output. |
| Score | Mortality Risk |
|---|---|
| 0-6 | Around 10% |
| 7-12 | Around 20-50% |
| 13+ | Around 50-90% |