Multiple organ dysfunction syndrome (MODS): pathophysiology, SOFA scoring, and management

Also known as MODS · Multiple organ failure · MOF · Multi-organ dysfunction · SOFA score · Sequential organ failure assessment

Multiple organ dysfunction syndrome (MODS) = progressive dysfunction of ≥2 organs in a critically ill patient (the common endpoint of sepsis, trauma, burns, pancreatitis, haemorrhage). PATHOPHYSIOLOGY: SYSTEMIC INFLAMMATION (SIRS — cytokine storm — TNF, IL-1, IL-6) - ENDOTHELIAL DYSFUNCTION (capillary leak, vasodilation, microvascular thrombosis) - ORGAN ISCHAEMIA + DYSFUNCTION. ORGANS AFFECTED: lung (ARDS), kidney (AKI), liver (ischaemic hepatitis), heart (septic cardiomyopathy), brain (septic encephalopathy), coagulation (DIC), gut (ileus, bacterial translocation). SCORING: SOFA (Sequential Organ Failure Assessment — 6 organs, daily — tracks trajectory + predicts mortality). MANAGEMENT: (1) TREAT THE CAUSE (sepsis — antibiotics immediately/source control; trauma — surgery; pancreatitis; etc.). (2) ORGAN SUPPORT (ventilation, vasopressors, RRT, transfusion). (3) AVOID HARM (fluid overload, hypoxaemia, hypotension, nosocomial infection, VTE, stress ulcer). (4) EARLY NUTRITION (enteral within 72 h — maintains gut integrity). (5) FAMILY + GOALS OF CARE (MODS mortality is high and rises with organ count and SOFA burden — discuss prognosis, escalation, withdrawal).

high12 referencesUpdated 20 Aug 202611 min readVerification in progress

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8 MCQs

In one line

MODS is progressive, potentially reversible dysfunction of two or more organs in a critically ill patient — the common final pathway of sepsis, trauma, burns, pancreatitis, and haemorrhage. One mechanism drives it: a dysregulated inflammatory response that injures the endothelium, leaks capillaries, and starves the organs. The SOFA score (six organs, daily) tracks the trajectory and predicts mortality, and a rise of two or more points defines sepsis. Management is treat the cause, support the organs, avoid the harm you cause yourself — and mortality tracks the burden: multiple organ dysfunction and high SOFA scores for any individual organ were associated with increased mortality in the original multicentre cohort, with mortality above 80 percent once the highest SOFA exceeds 11 or the mean exceeds 5.

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Meet the patient

A 62-year-old man is admitted with community-acquired pneumonia and septic shock. Forty-eight hours later, despite antibiotics and noradrenaline, his chest X-ray has white-out, his PaO2 over FiO2 has fallen to 130, his creatinine is 340, his platelets are 45, his bilirubin is 165, and his GCS is 9. One localised infection has produced failure of five organ systems in two days.^[2]

The question that decides his survival is not which vasopressor or which ventilator mode — it is whether you can find and kill the trigger before the cascade consumes him. Hold that question and every management step below falls into place.^[4]

References12Show

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