G . S . Matte et al .: J Extra Corpor Technol 2024 , 56 , 216 – 224 219
Figure 1 . Overall options to treat confirmed oxygenator failure with and without concern for system clots during cardiopulmonary bypass .
tubing into the CVR-outlet boot line . This addresses the limitations of the arterial boot tubing size and roller head size since flow to the piggyback device is provided with a separate pump head . Here , the secondary roller head pump is configured to draw venous blood from the CVR , pump it through the secondary oxygenator , and then back to the CVR . The third and likely most attractive option is to provide piggyback oxygenation to the venous blood , sourcing it from the venous line and returning it to the CVR . This method is dependent on the available venous line connections for flow capacity .