Intraoperative hemodynamic management is vital in the success of lung transplantation. Significant intraoperative hemodynamic compromise and hypoxic episodes may contribute to an increase in severe postoperative complications related to hypoperfusion, including cerebrovascular accidents, acute kidney injury, and mesenteric ischemia. In certain lung transplant recipients, intraoperative cardiopulmonary support is mandatory because certain factors would make "off-pump" transplants unsafe. These include severe pulmonary hypertension or severe ventricular dysfunction. In such patients, routine intraoperative support should be employed. However, it is possible to conduct the lung transplant without cardiopulmonary support in the remainder of patients who do not have severe pulmonary hypertension or right heart dysfunction. In such patients, the lung transplant may be started without cardiopulmonary support. However, cardiopulmonary support may be initiated "on-demand" if there is development or impending hemodynamic embarrassment or hypoxia. Conversely, the opposite approach would be to routinely conduct all lung transplant operations using cardiopulmonary support, which may also lead to specific ECMO-related complications. The investigators question whether on demand intraoperative ECMO in patients with significant risk factors will produce severe postoperative complications in a rate similar to routine ECMO.
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Timeframe: 6 months after the onset of study