“…At present, the use of veno-venous extracorporeal bypass break operation time limit of inferior vena cava interruption. 4 However, the veno-venous bypass (VVB) also has its own adverse effects, such as accidental decannulation, circuit clots, thrombotic events, prolongation of operation time, vessel injury, and coagulopathy. 5 In addition, some small hospital commonly does not have cardiopulmonary bypass equipment, and it is therefore easy to result in irreversible harmful effects on patients.…”