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The pathogenesis of lung injury following pulmonary resection Jordan S; Mitchell JA; Quinlan GJ; Goldstraw P; Evans TWEur Respir J 2000[Apr]; 15 (4): 790-9Postpneumonectomy pulmonary oedema (PPO) develops in approximately 5% of patients undergoing pneumonectomy or lobectomy, and has a high associated mortality (>50%). In its extreme form, PPO follows a clinical and histopathological course indistinguishable from acute respiratory distress syndrome. Perioperative fluid overload, impaired lymphatic drainage following node dissection and trauma caused by surgical manipulation have been implicated in the pathogenesis of PPO. However, PPO more probably represents the pulmonary manifestation of a panendothelial injury consequent upon inflammatory processes induced by the surgical procedure, which involves collapse and re-expansion of the operative lung to permit hilar dissection and pulmonary resection. High inspired oxygen concentrations are required to overcome the effects of shunt. Animal studies have shown that pulmonary ischaemia/reperfusion can result in oedema formation, possibly due to the generation of pro-oxidant forces. Moreover, plasma taken from patients undergoing lobectomy or pneumonectomy (but not lesser resections) shows evidence of oxidative damage. Such evidence suggests either that the high inspired oxygen concentrations associated with one-lung ventilation, or ischaemia/reperfusion injury, may modulate post-pneumonectomy pulmonary oedema. Mechanisms by which redox imbalance may result in tissue damage and postpneumonectomy pulmonary oedema are discussed.|Female[MESH]|Humans[MESH]|Incidence[MESH]|Infant, Newborn[MESH]|Male[MESH]|Pneumonectomy/*adverse effects[MESH]|Prognosis[MESH]|Pulmonary Edema/*epidemiology/*etiology/physiopathology[MESH]|Respiratory Distress Syndrome/epidemiology/etiology/physiopathology[MESH]|Risk Factors[MESH]|Survival Rate[MESH] |
