Organ Dysfunction Assessment in Critical Care

Assessment of organ dysfunction lies at the heart of contemporary critical care, offering an objective framework to quantify the severity and progression of multi-organ impairment in the intensive care unit. Central to this endeavour are composite scoring systems that integrate clinical, laboratory and, increasingly, non-invasive monitoring data to inform triage, prognostication and therapeutic decision-making. Historically, the Sequential Organ Failure Assessment (SOFA) score provided a standardised means to describe acute morbidity and to serve as an endpoint in sepsis trials. Over the past decade, advances in bedside technologies, digital health platforms and biomarker discovery have driven efforts to refine classical scores, integrate real-time data streams and develop machine-learning models capable of early detection of organ failure. Such tools hold global significance in optimising resource allocation, guiding personalised interventions and improving trial design across diverse settings, from resource-rich to resource-constrained environments.

Research from Nature Portfolio

Recent work has evaluated multiple scoring systems in patients with sepsis-associated acute respiratory failure to identify the most reliable predictor of in-hospital mortality. In a large cohort analysis, the Acute Physiology Score III demonstrated superior discrimination compared with the Logical Organ Dysfunction System, Simplified Acute Physiology Score II, Oxford Acute Severity of Illness Score and SOFA score. Decision-curve analysis further highlighted its greater net clinical benefit, suggesting that refined physiological weighting and dynamic calibration can enhance prognostic accuracy and inform the selection of endpoints in future interventional studies.

Organ Dysfunction Assessment in Critical Care publication trend

The graph below shows the total number of articles in organ dysfunction assessment in critical care across all publications each year (not limited to Nature Index journals).

Technical terms

Sequential Organ Failure Assessment (SOFA) score: Composite scoring system evaluating respiratory, cardiovascular, hepatic, coagulation, renal and neurological function to quantify acute organ dysfunction.

Delta SOFA: Change in SOFA score over a defined period, reflecting progression or resolution of organ dysfunction.

Acute Physiology Score III (APS III): Physiological scoring component assessing acute derangements to predict in-hospital mortality, commonly integrated into ICU prognostic models.

Logical Organ Dysfunction System (LODS): Organ dysfunction score combining laboratory and clinical parameters to assess severity and predict outcomes in critical illness.

Simplified Acute Physiology Score II (SAPS II): Simplified severity index based on physiological variables and comorbidities designed for mortality prediction in intensive care patients.

Acute kidney injury (AKI): Abrupt deterioration of renal function defined by changes in serum creatinine or urine output, frequently complicating critical illness.

References

1. The Sequential Organ Failure Assessment (SOFA) Score: has the time come for an update?. Critical Care (2023).
2. Validity of the total SOFA score in patients ≥ 80 years old acutely admitted to intensive care units: a post-hoc analysis of the VIP2 prospective, international cohort study. Annals of Intensive Care (2023).
3. Association between SOFA score and risk of acute kidney injury in patients with diabetic ketoacidosis: an analysis of the MIMIC-IV database. Frontiers in Endocrinology (2024).
4. The value of five scoring systems in predicting the prognosis of patients with sepsis-associated acute respiratory failure. Scientific Reports (2024).