Table 1_Influence of side-hole configuration on recirculation in dual-lumen cannulas for veno-venous extracorporeal membrane oxygenation: a parametric computational fluid dynamics study.docx

However, challenges such as recirculation and elevated wall shear stress (WSS) continue to impede their efficacy. The influence of the geometric configuration of drainage side holes on these hemodynamic parameters remains inadequately characterized.</p>Methods<p>In this study, we performed transient, non-Newtonian computational fluid dynamics (CFD) simulations on eight distinct DLC configurations subjected to pulsatile venous inflow.

These simulations were conducted within an idealized model of the vena cava and right atrium (RA), developed in accordance with ISO 18193:2021 standards. The study systematically varied the axial spacing between drainage holes and the infusion port (denoted as H₁/H₂), as well as the circumferential and axial arrangement of side holes in the superior vena cava (SVC) and inferior vena cava (IVC).</p>Results<p>Results indicate that the recirculation fraction (RF) is influenced by two geometric factors.