Mechanical analysis of mechanical aortic heart valve: Trileaflet versus bileaflet

Kiang-ia, Atthasak; Chatpun, Surapong

doi:10.1109/bmeicon.2013.6687696

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…The stress in the fixed design was approximately 2.9-and 1.1-fold lower than the expandable design for the closed and opened leaflet conditions, respectively. With regard to the value of the stress generated, the results of the analysis were inconsistent with a previous work by Kiang-ia et al, 2013 [25] that investigated the mechanical behaviours of the fixed valve. They reported a significantly lower stress value in the bileaflet mechanical valve model which was merely about 14 MPa that approximately 1513-times lower than our recorded value (21.18 GPa) for the fixed-type valve.…”

Section: Resultscontrasting

confidence: 85%

“…A number of studies has been conducted to evaluate or predict the performance of the mechanical heart valves in terms of different geometrical designs, features, and properties. This includes the analysis on different number of the leaflet [25], curvature of the leaflet tip [26], and potential of new leaflet material [27]. Based on past findings, the main hiccup of the mechanical heart valve is the need of anticoagulation medication to prevent blood clots around the valve [5,9].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Bileaflet Mechanical Heart Valve Designs on Biomechanical Behaviours – A Finite Element Analysis

Hasni,

Ahmad Shafi,

Ishak

2023

Jurnal Teknologi

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Heart valve replacement is a popular treatment modality for patients with valvular heart disease. One of the prominent issues of mechanical heart valve is blood clotting around the valve that could lead to operation failure. Different valve design affects the valve structural behaviour differently which could be associated to the valve leaflet movement and its attachment to the housing. This study aimed to analyse the stress and total deformation of a fixed and expandable heart valve designs under a closed and opened leaflet conditions using three-dimensional (3-D) finite element analysis (FEA). Geometrical valve models were created in SolidWorks 2020 and then exported into Ansys 2022 R2. All models were assigned with linearly elastic, isotropic, and homogenous properties. A pressure of 16 kPa was applied on the top (closed condition) and bottom (opened condition) surfaces of the leaflets. The results exhibited that the expandable design recorded about 98% and 8.6% higher stress than the fixed design under the closed and opened conditions, respectively. The expandable valve was also observed to generate approximately 186% and 182% greater total deformation compared to the fixed valve under the closed and opened conditions, respectively. Of the valve designs evaluated, the fixed valve was found to be more satisfactory. However, the expandable valve could also be of interest with relevant modifications imposed if the adverse functionality impacts are concerned.

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Section: Resultscontrasting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

The Effect of Bileaflet Mechanical Heart Valve Designs on Biomechanical Behaviours – A Finite Element Analysis

Hasni,

Ahmad Shafi,

Ishak

2023

Jurnal Teknologi

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“…This provides data that can be used in designing the valve for optimal in vitro and in vivo testing. However, some papers artificially render their idea of a trileaflet and bileaflet mechanical valve, which has limited value aside from a purely scientific research effort [30]. For the completeness of this review these papers were included, but should be interpreted with scrutiny.…”

Section: Discussionmentioning

confidence: 99%

“…In 2013, a computational study designed a trileaflet model and compared it to a bileaflet model [30]. The trileaflet valve was designed as a hemisphere equally divided in three parts.…”

Section: Computational Modelsmentioning

confidence: 99%

Trileaflet Mechanical Valves: What Is Already Known? A Systematic Review

Langenaeken

2024

JCSR

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Background: Trileaflet mechanical valves were introduced in the late 90’s. Despite promising results, none have made it past preclinical testing. Ample in vitro, in vivo and computational testing have already been done. Methods: This systematic review is intended to summarize all available preclinical and clinical testing regarding trileaflet mechanical valves. A literature search of Pubmed, Embase and Web of Science (Core Collection) (from inception to August 2023) was performed using a search string that was well defined and not modified during the study. An extensive overview of the search terms used in each database can be found in the appendix. 24 publications were included in this review. Results: This systematic review serves as an overview evaluating the rationale behind a trileaflet mechanical valve as well as the computational, in vitro and in vivo testing. We aim to summarize all available knowledge on trileaflet mechanical valves. Conclusions: A trileaflet mechanical valve is a promising concept, with equal or even superior hemodynamics compared to conventional bileaflet valves based on computational, in vivo and in vitro data. First in men trials are warranted to elude the true potential of this design.

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“…Currently, there are many existing designs of mechanical heart valves. The common designs include the ball and cage, tri-leaflet hinge or bi-leaflet hinge valves [16]. Each design has its advantages and disadvantages.…”

Section: Treatment and Interventionsmentioning

confidence: 99%

An automated method of generating NURBS meshes for patient-specific geometries

Ibrahim¹

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Cardiovascular disease is the number one reason for emergency room visits in the United States. Understanding the different pathologies of the cardiovascular system is crucial when trying to prescribe proper treatment or intervention. In order best understand these issues proper computer simulations would be necessary. Due to the fact that every patient is different. Being able to analysis and properly simulate each patients data individually to better understanding their specific case is necessary for patient specific interventions. In order to achieve such requirement we propose a new method of mesh generation to better map patient specific geometries. This new framework takes a set of points in a 3D space and generates a 2D NURBS mesh. Insuring a smooth and accurate representation of the patient specific geometry will allow for more specific incite to possible medical issues that may arise. This NURBS based mesh can be then used to run either finite element analysis, computational fluid dynamics, or even fluid solid interactions. Running these patientspecific valve simulations using isogementric modeling is what will allow us to have patient specific treatments and intervention.

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Mechanical analysis of mechanical aortic heart valve: Trileaflet versus bileaflet

Cited by 5 publications

References 9 publications

The Effect of Bileaflet Mechanical Heart Valve Designs on Biomechanical Behaviours – A Finite Element Analysis

The Effect of Bileaflet Mechanical Heart Valve Designs on Biomechanical Behaviours – A Finite Element Analysis

Trileaflet Mechanical Valves: What Is Already Known? A Systematic Review

An automated method of generating NURBS meshes for patient-specific geometries

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