[Early identification and protective strategies for pulmonary and extrapulmonary organ injury secondary to severe pneumonia].
Severe pneumonia is one of the critical illness with the highest incidences and mortality rates in the intensive care unit. Its core threat lies not in the pulmonary infection itself, but in the subsequent multiple organ dysfunction syndrome (MODS). This review systematically delineates how severe pneumonia collectively accelerates organ injury through systemic inflammatory responses, type 2 immunity mediated by airway epithelial alarmins, endothelial thrombo-inflammatory pathways, as well as inappropriate oxygen therapy and mechanical ventilation. It further reviews the key points for early identification at the subclinical state, specific early-warning biomarkers, and bedside monitoring techniques applicable to extrapulmonary organs, including the heart, kidney, liver, and gastrointestinal tract, and proposes an integrated organ-protective strategy. This review emphasizes the concept of shifting the diagnostic and therapeutic window earlier, and aims to provide a reference for improving the comprehensive management of severe pneumonia by synthesizing current evidence and clinical practice.