Acute lung injury

Acute lung injury (ALI) represents a rapid-onset condition in which the lung tissue becomes severely inflamed, leading to impaired gas exchange and respiratory distress. It can result from direct insults, such as pneumonia, aspiration, or inhalation of toxic substances, or indirect causes like sepsis, trauma, or severe pancreatitis. Patients typically present with sudden shortness of breath, rapid breathing, hypoxemia, and diffuse infiltrates visible on imaging studies. Early recognition is critical, as untreated ALI can progress to acute respiratory distress syndrome (ARDS), a more severe form with high morbidity and mortality. Diagnosis relies on clinical evaluation, arterial blood gas analysis, chest imaging, and the exclusion of cardiac causes of pulmonary edema.

Management of acute lung injury involves a combination of supportive care and targeted interventions to minimize lung damage. Oxygen supplementation and non-invasive or invasive mechanical ventilation are often required to maintain adequate oxygenation. Strategies such as low tidal volume ventilation, prone positioning, and careful fluid management help reduce ventilator-induced injury and improve gas exchange. Treating the underlying cause—whether infection, trauma, or systemic inflammation—is essential to halt progression. Adjunctive therapies may include sedation, anticoagulation, or specific pharmacologic agents depending on the clinical scenario. Multidisciplinary teams, including pulmonologists, critical care specialists, and respiratory therapists, collaborate to optimize care, monitor complications, and support recovery. Early intervention and comprehensive management of acute lung injury can improve survival, reduce long-term respiratory impairment, and enhance overall patient outcomes.