What has been your stepwise approach to oxygenation, including when to consider the use of inhaled nitric oxide or epoprostenol, in refractory hypoxemia due to cardiogenic pulmonary edema in patients who are otherwise not ECMO candidates?

Stepwise Approach to Oxygenation in Refractory Hypoxemia Due to Cardiogenic Pulmonary Edema:

1. Initial Stabilization and Oxygen Therapy:

   • Start with supplemental oxygen to maintain SpOâ‚‚ > 90%.
   • Use noninvasive ventilation (NIV), such as CPAP or BiPAP, to provide positive end-expiratory pressure (PEEP), which reduces pulmonary capillary pressures and improves oxygenation.
   • Evidence: NIV has shown to reduce the need for intubation in acute cardiogenic pulmonary edema (Masip et al., PMID 16380593).

2. Hemodynamic Optimization:

   • Administer IV diuretics (e.g., furosemide) to reduce preload and pulmonary congestion.
   • Add vasodilators (e.g., nitroglycerin) to reduce afterload and systemic vascular resistance.
   • Evidence: A meta-analysis highlighted th...