SOFA Organ Failure Score
Calculate SOFA score for organ failure assessment in ICU patients
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About SOFA Organ Failure Score
Quantify Organ Dysfunction With the SOFA Score
Sepsis remains one of the leading causes of death in hospitalised patients, and early recognition of organ dysfunction is the key to improving survival. The SOFA Organ Failure Score calculator implements the Sequential Organ Failure Assessment score, which evaluates the function of six organ systems to quantify the severity of organ dysfunction. Since the Sepsis-3 definitions were published in 2016, an acute change in SOFA score of 2 or more points has become the defining criterion for sepsis.
The SOFA score was originally designed for use in intensive care units, but its importance has extended to emergency departments, medical wards, and any setting where critically ill patients are managed. This tool makes the calculation straightforward, allowing clinicians to focus on patient care rather than manual scoring.
How the SOFA Score Is Calculated
Six organ systems are each scored from 0 (normal) to 4 (severe dysfunction). Respiratory: PaO2/FiO2 ratio. Coagulation: platelet count. Liver: bilirubin level. Cardiovascular: mean arterial pressure and vasopressor requirements. Central nervous system: Glasgow Coma Scale score. Renal: creatinine level and urine output.
Enter the relevant values for each system, and the calculator produces individual organ scores and the total SOFA score (0-24). It also computes the delta SOFA (change from baseline) if you provide baseline values, which is the criterion used in the Sepsis-3 definition. The tool displays mortality estimates corresponding to each score range.
Who Uses the SOFA Score?
Intensivists calculate SOFA daily for every ICU patient to track the trajectory of organ dysfunction. Emergency physicians use quick SOFA (qSOFA) as a screening tool, followed by full SOFA calculation when sepsis is suspected. Sepsis response teams use the score to identify patients who need escalation of care. Clinical researchers use SOFA as a primary or secondary outcome measure in critical care trials.
The SOFA Organ Failure Score calculator serves both as a clinical tool and an educational resource for understanding the multi-organ nature of sepsis and critical illness.
SOFA and Sepsis-3
Under the Sepsis-3 criteria, sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection - operationally identified as an acute increase in SOFA score of 2 or more points. Septic shock is further defined as sepsis with vasopressor requirement to maintain MAP above 65 mmHg and a lactate above 2 mmol/L despite adequate fluid resuscitation. This tool helps clinicians apply these definitions at the bedside.
Practical Considerations
Calculate SOFA at admission and every 24 hours to track trends. A rising SOFA score indicates worsening organ dysfunction and should prompt reassessment of the treatment plan. The maximum SOFA score during an ICU stay is a strong predictor of mortality. For patients where baseline organ function is unknown, assume a baseline SOFA of 0 unless the patient has known chronic organ dysfunction. Remember that SOFA quantifies dysfunction severity but does not diagnose the cause - always investigate and treat the underlying pathology driving the organ failure.