Multiple organ dysfunction syndrome (MODS)

Causes and pathophysiology

Common triggers include severe infection (sepsis), major trauma, extensive burns, pancreatitis, massive transfusion, and prolonged low blood flow (shock). The underlying mechanism is usually a dysregulated host response: systemic inflammation, endothelial injury, impaired microcirculation, and mitochondrial dysfunction that together reduce oxygen delivery and cellular metabolism. These processes can produce a self‑sustaining cycle that propagates injury across multiple organs.

Clinical features and diagnosis

MODS is recognized by progressive abnormalities in organ systems rather than a single isolated failure. Typical patterns involve the lungs, cardiovascular system, kidneys, liver, brain, and coagulation. Common clinical and laboratory findings include respiratory insufficiency, hypotension requiring vasopressors, rising creatinine or need for renal replacement therapy, altered mental status, abnormal liver tests, and coagulopathy.

• Frequently affected systems: respiratory, cardiovascular, renal, hepatic, neurologic, hematologic.
• Diagnosis is clinical and supported by laboratory and imaging data; scoring systems are used to quantify severity.

For a concise reference on organ-specific criteria see organ dysfunction definitions.

Management and importance

Treatment focuses on identifying and correcting the initiating cause, supporting failing organs, and preventing further injury. Supportive measures may include mechanical ventilation, vasopressors, intravenous fluids, renal replacement therapy, and targeted treatment of infection. Multidisciplinary critical care aims to restore and maintain physiologic stability through ongoing medical intervention to achieve homeostasis.

History, terminology and prognosis

The condition was historically called multiple organ failure (MOF) or multisystem organ failure, but contemporary use favors "dysfunction" because organs can be impaired without irreversible failure. Prognosis depends on the number and severity of organs involved and on the underlying cause; mortality rises as more systems become affected. Prevention emphasizes early recognition of sepsis and timely resuscitation, and research continues into therapies that modulate the inflammatory response and protect organ function.