CTICasesMultilumen Single-Canula Veno-Venous ECMO (Avalon Catheter)
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Imaging findings
Chest radiography demonstrates diffuse bilateral lung opacities in a patient with acute respiratory failure on mechanical ventilation. A single, large-bore, dual-lumen veno-venous extracorporeal membrane oxygenation cannula is positioned via the right internal jugular vein. A distinct discontinuity or notch in the radiopaque marker of the cannula is visible in the mid-portion of the catheter at the level of the right atrium.
Key takeaways
The Avalon catheter is a specialized multilumen single cannula designed for veno-venous extracorporeal membrane oxygenation. The cannula draws deoxygenated blood from both the superior and inferior vena cava and returns oxygenated blood directly into the right atrium, directed toward the tricuspid valve, minimizing recirculation and requiring precise radiographic positioning.
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