Hemodynamic and recirculation performance of dual lumen cannulas for venovenous extracorporeal membrane oxygenation
Scientific Reports(2023)
Abstract
Venovenous extracorporeal membrane oxygenation (ECMO) can be performed with two single lumen cannulas (SLCs) or one dual-lumen cannula (DLC) where low recirculation fraction ( R_f ) is a key performance criterion. DLCs are widely believed to have lower R_f , though these have not been directly compared. Similarly, correct positioning is considered critical although its impact is unclear. We aimed to compare two common bi-caval DLC designs and quantify R_f in several positions. Two different commercially available DLCs were sectioned, measured, reconstructed, scaled to 27Fr and simulated in our previously published patient-averaged computational model of the right atrium (RA) and venae cavae at 2–6 L/min. One DLC was then used to simulate ± 30° and ± 60° rotation and ± 4 cm insertion depth. Both designs had low R_f (< 7
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Key words
dual lumen cannulas,membrane
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