Key result
The peak wall shear stress values in the SJM Regent bileaflet mechanical heart valve were observed to be almost twice those seen in the Lapeyre-Triflo FURTIVA trileaflet mechanical heart valve.
Why the study?
Does the Lapeyre-Triflo FURTIVA trileaflet mechanical heart valve reduce peak wall shear stress in the ascending aorta compared to the SJM Regent bileaflet mechanical heart valve in an in-vitro model?
Does the Lapeyre-Triflo FURTIVA trileaflet mechanical heart valve reduce peak wall shear stress in the ascending aorta compared to the SJM Regent bileaflet mechanical heart valve in an in-vitro model?
Answers are grounded in this paper and cite their sources.
In an in-vitro aortic model, a trileaflet mechanical heart valve generated substantially lower peak wall shear stress than a standard bileaflet valve, suggesting potential hemodynamic advantages.
An experimental study is reported which investigates the wall shear stress (WSS) distribution in a transparent model of the human aorta comparing an St. Jude Medical (SJM) Regent bileaflet mechanical heart valve (BMHV) with the Lapeyre-Triflo FURTIVA trileaflet mechanical heart valve (TMHV) in physiological pulsatile flow. Elastic microcantilever structures, calibrated as micropillar WSS sensors by microparticle-image-velocimetry measurements, are applied to the wall along the ascending aorta (AAo). The peak WSS values in the BMHV are observed to be almost twice that of the values seen in the TMHV. Flow field analysis illuminates that these peaks are linked to the jet-like flows generated in the valves interacting with the aortic wall. Not only the magnitude but also the impact regions are specific for different valve designs. The side-orifice jets generated by the BMHV travel along the aortic wall in the AAo, impacting the wall throughout the AAo. However, the jets generated by TMHV impact further downstream in the AAo and results in a reduced WSS.
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Li et al. (2019) studied Aortic valve replacement (in-vitro simulation). Lapeyre-Triflo FURTIVA trileaflet mechanical heart valve vs. SJM Regent bileaflet mechanical heart valve was evaluated on Peak wall shear stress (WSS) values in the ascending aorta. The peak wall shear stress values in the SJM Regent bileaflet mechanical heart valve were observed to be almost twice those seen in the Lapeyre-Triflo FURTIVA trileaflet mechanical heart valve.
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