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Overset meshing in combination with novel blended weak-strong fluid-structure interactions for simulations of a translating valve in series with a second valve
This study developed a combined computational fluid dynamics and fluid-structure interaction (FSI) methodology for simulating positive displacement bileaflet valves. Overset meshing discretised the fluid domain, and a blended weak-strong coupling FSI algorithm was combined with variable time-stepping. Four operating conditions of relevant stroke lengths and rates were assessed. The results demonstrated this modelling strategy is stable and efficient for modelling positive-displacement artificial hearts.PMID:37071538 | DOI:10.1080/10255842.2023.2199903
Source: Computer Methods in Biomechanics and Biomedical Engineering - April 18, 2023 Category: Biomedical Engineering Authors: J Bornoff H S Gill A Najar I L Perkins A N Cookson K H Fraser Source Type: research

A Novel Hybrid Membrane VAD as First Step Toward Hemocompatible Blood Propulsion.
P, Potapov E, Falk V, Mazza E Abstract Heart failure is a raising cause of mortality. Heart transplantation and ventricular assist device (VAD) support represent the only available lifelines for end stage disease. In the context of donor organ shortage, the future role of VAD as destination therapy is emerging. Yet, major drawbacks are connected to the long-term implantation of current devices. Poor VAD hemocompatibility exposes the patient to life-threatening events, including haemorrhagic syndromes and thrombosis. Here, we introduce a new concept of artificial support, the Hybrid Membrane VAD, as a first-of-its...
Source: Annals of Biomedical Engineering - September 7, 2020 Category: Biomedical Engineering Authors: Ferrari A, Giampietro C, Bachmann B, Bernardi L, Bezuidenhhout D, Ermanni P, Hopf R, Kitz S, Kress G, Loosli C, Marina V, Meboldt M, Pellegrini G, Poulikakos D, Rebholz M, Schmid Daners M, Schmidt T, Starck C, Stefopoulos G, Sündermann S, Thamsen B, Zill Tags: Ann Biomed Eng Source Type: research