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Bornoff J, Gill HS, Najar A, Perkins IL, Cookson AN, Fraser KH. Overset meshing in combination with novel blended weak-strong fluid-structure interactions for simulations of a translating valve in series with a second valve. Comput Methods Biomech Biomed Engin 2024; 27:736-750. [PMID: 37071538 DOI: 10.1080/10255842.2023.2199903] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 03/30/2023] [Indexed: 04/19/2023]
Abstract
Mechanical circulatory support (MCS) devices can bridge the gap to transplant whilst awaiting a viable donor heart. The Realheart Total Artificial Heart is a novel positive-displacement MCS that generates pulsatile flow via bileaflet mechanical valves. 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.
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Affiliation(s)
- J Bornoff
- Department of Mechanical Engineering, University of Bath, Bath, UK
| | - H S Gill
- Department of Mechanical Engineering, University of Bath, Bath, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, UK
| | - A Najar
- Scandinavian Real Heart AB, Västerås, Västmanland, Sweden
| | - I L Perkins
- Scandinavian Real Heart AB, Västerås, Västmanland, Sweden
| | - A N Cookson
- Department of Mechanical Engineering, University of Bath, Bath, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, UK
| | - K H Fraser
- Department of Mechanical Engineering, University of Bath, Bath, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, UK
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2
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Nascimbene A, Bark D, Smadja DM. Hemocompatibility and biophysical interface of left ventricular assist devices and total artificial hearts. Blood 2024; 143:661-672. [PMID: 37890145 PMCID: PMC10900168 DOI: 10.1182/blood.2022018096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 10/29/2023] Open
Abstract
ABSTRACT Over the past 2 decades, there has been a significant increase in the utilization of long-term mechanical circulatory support (MCS) for the treatment of cardiac failure. Left ventricular assist devices (LVADs) and total artificial hearts (TAHs) have been developed in parallel to serve as bridge-to-transplant and destination therapy solutions. Despite the distinct hemodynamic characteristics introduced by LVADs and TAHs, a comparative evaluation of these devices regarding potential complications in supported patients, has not been undertaken. Such a study could provide valuable insights into the complications associated with these devices. Although MCS has shown substantial clinical benefits, significant complications related to hemocompatibility persist, including thrombosis, recurrent bleeding, and cerebrovascular accidents. This review focuses on the current understanding of hemostasis, specifically thrombotic and bleeding complications, and explores the influence of different shear stress regimens in long-term MCS. Furthermore, the role of endothelial cells in protecting against hemocompatibility-related complications of MCS is discussed. We also compared the diverse mechanisms contributing to the occurrence of hemocompatibility-related complications in currently used LVADs and TAHs. By applying the existing knowledge, we present, for the first time, a comprehensive comparison between long-term MCS options.
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Affiliation(s)
- Angelo Nascimbene
- Advanced Cardiopulmonary Therapies and Transplantation, University of Texas, Houston, TX
| | - David Bark
- Division of Hematology and Oncology, Department of Pediatrics, Washington University in St. Louis, St. Louis, MO
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO
| | - David M. Smadja
- Université de Paris-Cité, Innovative Therapies in Haemostasis, INSERM, Paris, France
- Hematology Department, Assistance Publique–Hôpitaux de Paris, Georges Pompidou European Hospital, Paris, France
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3
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Bornoff J, Najar A, Fresiello L, Finocchiaro T, Perkins IL, Gill H, Cookson AN, Fraser KH. Fluid-structure interaction modelling of a positive-displacement Total Artificial Heart. Sci Rep 2023; 13:5734. [PMID: 37059748 PMCID: PMC10104863 DOI: 10.1038/s41598-023-32141-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 03/23/2023] [Indexed: 04/16/2023] Open
Abstract
For those suffering from end-stage biventricular heart failure, and where a heart transplantation is not a viable option, a Total Artificial Heart (TAH) can be used as a bridge to transplant device. The Realheart TAH is a four-chamber artificial heart that uses a positive-displacement pumping technique mimicking the native heart to produce pulsatile flow governed by a pair of bileaflet mechanical heart valves. The aim of this work was to create a method for simulating haemodynamics in positive-displacement blood pumps, using computational fluid dynamics with fluid-structure interaction to eliminate the need for pre-existing in vitro valve motion data, and then use it to investigate the performance of the Realheart TAH across a range of operating conditions. The device was simulated in Ansys Fluent for five cycles at pumping rates of 60, 80, 100 and 120 bpm and at stroke lengths of 19, 21, 23 and 25 mm. The moving components of the device were discretised using an overset meshing approach, a novel blended weak-strong coupling algorithm was used between fluid and structural solvers, and a custom variable time stepping scheme was used to maximise computational efficiency and accuracy. A two-element Windkessel model approximated a physiological pressure response at the outlet. The transient outflow volume flow rate and pressure results were compared against in vitro experiments using a hybrid cardiovascular simulator and showed good agreement, with maximum root mean square errors of 15% and 5% for the flow rates and pressures respectively. Ventricular washout was simulated and showed an increase as cardiac output increased, with a maximum value of 89% after four cycles at 120 bpm 25 mm. Shear stress distribution over time was also measured, showing that no more than [Formula: see text]% of the total volume exceeded 150 Pa at a cardiac output of 7 L/min. This study showed this model to be both accurate and robust across a wide range of operating points, and will enable fast and effective future studies to be undertaken on current and future generations of the Realheart TAH.
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Affiliation(s)
- Joseph Bornoff
- Department of Mechanical Engineering, University of Bath, Bath, UK
| | - Azad Najar
- Scandinavian Real Heart AB, Västerås, Sweden
| | - Libera Fresiello
- Faculty of Science and Technology, University of Twente, Twente, The Netherlands
| | | | | | - Harinderjit Gill
- Department of Mechanical Engineering, University of Bath, Bath, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, UK
| | - Andrew N Cookson
- Department of Mechanical Engineering, University of Bath, Bath, UK
- Centre for Therapeutic Innovation, University of Bath, Bath, UK
| | - Katharine H Fraser
- Department of Mechanical Engineering, University of Bath, Bath, UK.
- Centre for Therapeutic Innovation, University of Bath, Bath, UK.
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Poitier B, Chocron R, Peronino C, Philippe A, Pya Y, Rivet N, Richez U, Bekbossynova M, Gendron N, Grimmé M, Bories MC, Brichet J, Capel A, Rancic J, Vedie B, Roussel JC, Jannot AS, Jansen P, Carpentier A, Ivak P, Latremouille C, Netuka I, Smadja DM. Bioprosthetic Total Artificial Heart in Autoregulated Mode Is Biologically Hemocompatible: Insights for Multimers of von Willebrand Factor. Arterioscler Thromb Vasc Biol 2022; 42:470-480. [PMID: 35139659 DOI: 10.1161/atvbaha.121.316833] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Carmat bioprosthetic total artificial heart (Aeson; A-TAH) is a pulsatile and autoregulated device. The aim of this study is to evaluate level of hemolysis potential acquired von Willebrand syndrome after A-TAH implantation. METHODS We examined the presence of hemolysis and acquired von Willebrand syndrome in adult patients receiving A-TAH support (n=10) during their whole clinical follow-up in comparison with control subjects and adult patients receiving Heartmate II or Heartmate III support. We also performed a fluid structure interaction model coupled with computational fluid dynamics simulation to evaluate the A-TAH resulting shear stress and its distribution in the blood volume. RESULTS The cumulative duration of A-TAH support was 2087 days. A-TAH implantation did not affect plasma free hemoglobin over time, and there was no association between plasma free hemoglobin and cardiac output or beat rate. For VWF (von Willebrand factor) evaluation, A-TAH implantation did not modify multimers profile of VWF in contrast to Heartmate II and Heartmate III. Furthermore, fluid structure interaction coupled with computational fluid dynamics showed a gradually increase of blood damage according to increase of cardiac output (P<0.01), however, the blood volume fraction that endured significant shear stresses was always inferior to 0.03% of the volume for both ventricles in all regimens tested. An inverse association between cardiac output, beat rate, and high-molecular weight multimers ratio was found. CONCLUSIONS We demonstrated that A-TAH does not cause hemolysis or AWVS. However, relationship between HMWM and cardiac output depending flow confirms relevance of VWF as a biological sensor of blood flow, even in normal range.
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Affiliation(s)
- Bastien Poitier
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France (B.P., A.C., C.L.).,Cardiac Surgery Department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (B.P., A.C., C.L.).,Carmat SAS, Velizy-Villacoublay, France (B.P., U.R., M.G., A.C., P.J.)
| | - Richard Chocron
- Université de Paris, PARCC, INSERM, F-75015 Paris, France, Emergency department, AP-HP, Georges Pompidou European Hospital, France (R.C.)
| | - Christophe Peronino
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | - Aurélien Philippe
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | - Yuri Pya
- National Research Cardiac, Surgery Center, Nur-Sultan, Kazakhstan (Y.P., M.B.)
| | - Nadia Rivet
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | - Ulysse Richez
- Carmat SAS, Velizy-Villacoublay, France (B.P., U.R., M.G., A.C., P.J.).,Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | | | - Nicolas Gendron
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | - Marc Grimmé
- Carmat SAS, Velizy-Villacoublay, France (B.P., U.R., M.G., A.C., P.J.)
| | - Marie Cécile Bories
- Université de Paris, Cardiac Surgery Department, AP-HP, Georges Pompidou European Hospital, France (M.C.B.)
| | - Julie Brichet
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | - Antoine Capel
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France (B.P., A.C., C.L.).,Cardiac Surgery Department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (B.P., A.C., C.L.)
| | - Jeanne Rancic
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
| | - Benoit Vedie
- AP-HP, Biochemistry Department, Georges Pompidou European Hospital, France (B.V.)
| | - Jean Christian Roussel
- Cardiac and thoracic Surgery Department, CHU de Nantes, hôpital Nord Laënnec, boulevard Jacques-Monod, France (J.C.R.)
| | - Anne-Sophie Jannot
- Department of Bioinformatics, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, Paris, France (A.-S.J.)
| | | | - Alain Carpentier
- Carmat SAS, Velizy-Villacoublay, France (B.P., U.R., M.G., A.C., P.J.)
| | - Peter Ivak
- Department of Cardiovascular Surgery, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (P.I., I.N.)
| | - Christian Latremouille
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France (B.P., A.C., C.L.).,Cardiac Surgery Department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (B.P., A.C., C.L.)
| | - Ivan Netuka
- Department of Cardiovascular Surgery, Institute for Clinical and Experimental Medicine, Prague, Czech Republic (P.I., I.N.)
| | - David M Smadja
- Université de Paris, Innovative Therapies in Hemostasis, INSERM, F-75006 Paris, France, Hematology department and Biosurgical Research lab (Carpentier Foundation), AP-HP, Georges Pompidou European Hospital, France (C.P., A.P., N.R., U.R., N.G., J.B., J.R., D.M.S.)
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5
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Kelly NS, McCree D, Fresiello L, Brynedal Ignell N, Cookson AN, Najar A, Perkins IL, Fraser KH. Video-based valve motion combined with computational fluid dynamics gives stable and accurate simulations of blood flow in the Realheart total artificial heart. Artif Organs 2021; 46:57-70. [PMID: 34460941 DOI: 10.1111/aor.14056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 07/29/2021] [Accepted: 08/25/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Patients with end-stage, biventricular heart failure, and for whom heart transplantation is not an option, may be given a Total Artificial Heart (TAH). The Realheart® is a novel TAH which pumps blood by mimicking the native heart with translation of an atrioventricular plane. The aim of this work was to create a strategy for using Computational Fluid Dynamics (CFD) to simulate haemodynamics in the Realheart®, including motion of the atrioventricular plane and valves. METHODS The accuracies of four different computational methods for simulating fluid-structure interaction of the prosthetic valves were assessed by comparison of chamber pressures and flow rates with experimental measurements. The four strategies were: prescribed motion of valves opening and closing at the atrioventricular plane extrema; simulation of fluid-structure interaction of both valves; prescribed motion of the mitral valve with simulation of fluid-structure interaction of the aortic valve; motion of both valves prescribed from video analysis of experiments. RESULTS The most accurate strategy (error in ventricular pressure of 6%, error in flow rate of 5%) used video-prescribed motion. With the Realheart operating at 80 bpm, the power consumption was 1.03 W, maximum shear stress was 15 Pa, and washout of the ventricle chamber after 4 cycles was 87%. CONCLUSIONS This study, the first CFD analysis of this novel TAH, demonstrates that good agreement between computational and experimental data can be achieved. This method will therefore enable future optimisation of the geometry and motion of the Realheart®.
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Affiliation(s)
| | - Danny McCree
- Department of Mechanical Engineering, University of Bath, Bath, UK
| | - Libera Fresiello
- Department of Cardiovascular Sciences, Katholieke Universiteit (KU) Leuven, Leuven, Belgium
| | | | - Andrew N Cookson
- Department of Mechanical Engineering, University of Bath, Bath, UK
| | - Azad Najar
- Scandinavian Real Heart AB, Västerås, Sweden
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6
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Liu GM, Jiang FQ, Yang XH, Wei RJ, Hu SS. Experimental investigation of the influence of the hydraulic performance of an axial blood pump on intraventricular blood flow. Int J Artif Organs 2021; 44:980-989. [PMID: 33908310 DOI: 10.1177/03913988211013046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Blood flow inside the left ventricle (LV) is a concern for blood pump use and contributes to ventricle suction and thromboembolic events. However, few studies have examined blood flow inside the LV after a blood pump was implanted. In this study, in vitro experiments were conducted to emulate the intraventricular blood flow, such as blood flow velocity, the distribution of streamlines, vorticity and the standard deviation of velocity inside the LV during axial blood pump support. A silicone LV reconstructed from computerized tomography (CT) data of a heart failure patient was incorporated into a mock circulatory loop (MCL) to simulate human systemic circulation. Then, the blood flow inside the ventricle was examined by particle image velocimetry (PIV) equipment. The results showed that the operating conditions of the axial blood pump influenced flow patterns within the LV and areas of potential blood stasis, and the intraventricular swirling flow was altered with blood pump support. The presence of vorticity in the LV from the thoracic aorta to the heart apex can provide thorough washing of the LV cavity. The gradually extending stasis region in the central LV with increasing blood pump support is necessary to reduce the thrombosis potential in the LV.
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Affiliation(s)
- Guang-Mao Liu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen, China
| | - Fu-Qing Jiang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen, China
| | - Xiao-Han Yang
- Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen, China
| | | | - Sheng-Shou Hu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen, China
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7
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Luraghi G, Rodriguez Matas JF, Migliavacca F. In silico approaches for transcatheter aortic valve replacement inspection. Expert Rev Cardiovasc Ther 2020; 19:61-70. [PMID: 33201738 DOI: 10.1080/14779072.2021.1850265] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Introduction: Increasing applications of transcatheter aortic valve replacement (TAVR) to treat high- or medium-risk patients with aortic diseases have been proposed in recent years. Despite its increasing use, many influential factors are still to be understood. Furthermore, innovative applications of TAVR such as in bicuspid aortic valves or in low-risk patients are emerging in clinical use. Numerical analyses are increasingly used to reproduce clinical treatments. The future trends in this area are foreseen for in silico trials and personalized medicine. Areas covered: This review paper analyzes the recent years (Jan 2018 - Aug 2020) of in silico studies simulating the behavior of transcatheter aortic valves with emphasis on the addressed clinical question and the used modeling strategies. The manuscripts are firstly classified based on their clinical hypothesis. A second classification is based on the adopted modeling approach in terms of patient domain, device modeling, and inclusion or exclusion of the fluid domain. Expert opinion: The TAVR can be virtually performed in numerous vessel geometries and with different devices. This versatility allows a rapid evaluation of the feasibility of different implantation approaches for specific patients, and patient populations, resulting in faster and safer introduction or optimization of new treatments or devices.
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Affiliation(s)
- Giulia Luraghi
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering 'Giulio Natta, Politecnico di Milano , Milan, Italy
| | - Jose Felix Rodriguez Matas
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering 'Giulio Natta, Politecnico di Milano , Milan, Italy
| | - Francesco Migliavacca
- Laboratory of Biological Structure Mechanics, Department of Chemistry, Materials and Chemical Engineering 'Giulio Natta, Politecnico di Milano , Milan, Italy
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8
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Colombo M, Luraghi G, Cestariolo L, Ravasi M, Airoldi A, Chiastra C, Pennati G. Impact of lower limb movement on the hemodynamics of femoropopliteal arteries: A computational study. Med Eng Phys 2020; 81:105-117. [DOI: 10.1016/j.medengphy.2020.05.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/07/2020] [Accepted: 05/10/2020] [Indexed: 02/07/2023]
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9
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Luraghi G, De Gaetano F, Rodriguez Matas JF, Dubini G, Costantino ML, De Castilla H, Griffaton N, Vignale D, Palmisano A, Gentile G, Esposito A, Migliavacca F. A numerical investigation to evaluate the washout of blood compartments in a total artificial heart. Artif Organs 2020; 44:976-986. [DOI: 10.1111/aor.13717] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/28/2020] [Accepted: 04/23/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Giulia Luraghi
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milan Italy
| | - Francesco De Gaetano
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milan Italy
| | - José Félix Rodriguez Matas
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milan Italy
| | - Gabriele Dubini
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milan Italy
| | - Maria Laura Costantino
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milan Italy
| | | | | | - Davide Vignale
- Experimental Imaging Center IRCCS Ospedale San Raffaele Milan Italy
- Università Vita‐Salute San Raffaele Milan Italy
| | - Anna Palmisano
- Experimental Imaging Center IRCCS Ospedale San Raffaele Milan Italy
- Università Vita‐Salute San Raffaele Milan Italy
| | - Giuseppe Gentile
- Experimental Imaging Center IRCCS Ospedale San Raffaele Milan Italy
| | - Antonio Esposito
- Experimental Imaging Center IRCCS Ospedale San Raffaele Milan Italy
- Università Vita‐Salute San Raffaele Milan Italy
| | - Francesco Migliavacca
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milan Italy
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10
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Hirschhorn M, Tchantchaleishvili V, Stevens R, Rossano J, Throckmorton A. Fluid–structure interaction modeling in cardiovascular medicine – A systematic review 2017–2019. Med Eng Phys 2020; 78:1-13. [DOI: 10.1016/j.medengphy.2020.01.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 01/18/2020] [Accepted: 01/26/2020] [Indexed: 01/06/2023]
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11
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Richez U, De Castilla H, Guerin CL, Gendron N, Luraghi G, Grimme M, Wu W, Taverna M, Jansen P, Latremouille C, Migliavacca F, Dubini G, Capel A, Carpentier A, Smadja DM. Hemocompatibility and safety of the Carmat Total Artifical Heart hybrid membrane. Heliyon 2019; 5:e02914. [PMID: 31867454 PMCID: PMC6906674 DOI: 10.1016/j.heliyon.2019.e02914] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/12/2019] [Accepted: 11/21/2019] [Indexed: 11/25/2022] Open
Abstract
The Carmat bioprosthetic total artificial heart (C-TAH) is a biventricular pump developed to minimize drawbacks of current mechanical assist devices and improve quality of life during support. This study aims to evaluate the safety of the hybrid membrane, which plays a pivotal role in this artificial heart. We investigated in particular its blood-contacting surface layer of bovine pericardial tissue, in terms of mechanical aging, risks of calcification, and impact of the hemodynamics shear stress inside the ventricles on blood components. Hybrid membranes were aged in a custom-designed endurance bench. Mechanical, physical and chemical properties were not significantly modified from 9 months up to 4 years of aging using a simulating process. Exploration of erosion areas did not show no risk of oil diffusion through the membrane. Blood contacting materials in the ventricular cavities were subcutaneously implanted in Wistar rats for 30 days as a model for calcification and demonstrated that the in-house anti-calcification pretreatment with Formaldehyde-Ethanol-Tween 80 was able to significantly reduce the calcium concentration from 132 μg/mg to 4.42 μg/mg (p < 0.001). Hemodynamic simulations with a computational model were used to reproduce shear stress in left and right ventricles and no significant stress was able to trigger hemolysis, platelet activation nor degradation of the von Willebrand factor multimers. Moreover, explanted hybrid membranes from patients included in the feasibility clinical study were analyzed confirming preclinical results with the absence of significant membrane calcification. At last, blood plasma bank analysis from the four patients implanted with C-TAH during the feasibility study showed no residual glutaraldehyde increase in plasma and confirmed hemodynamic simulation-based results with the absence of hemolysis and platelet activation associated with normal levels of plasma free hemoglobin and platelet microparticles after C-TAH implantation. These results on mechanical aging, calcification model and hemodynamic simulations predicted the safety of the hybrid membrane used in the C-TAH, and were confirmed in the feasibility study.
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Affiliation(s)
- Ulysse Richez
- Université de Paris, Innovative Therapies in Haemostasis, INSERM UMR-S1140, F-75006, Paris, France.,et Laboratoire de Recherches Biochirugicales (Fondation Carpentier), AH-HP, Georges Pompidou European Hospital, F-75015, Paris, France.,Carmat SA, Vélizy-Villacoublay, France
| | | | - Coralie L Guerin
- Institut Curie, Flow Cytometry Department, F-75006, Paris, France.,National Cytometry Platform, Department of Infection and Immunity, Luxembourg Institute of Health, Luxembourg
| | - Nicolas Gendron
- Service D'Hématologie et Laboratoire de Recherches Biochirugicales (Fondation Carpentier), AH-HP, Georges Pompidou European Hospital, F-75015, Paris, France
| | - Giulia Luraghi
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | | | - Wei Wu
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Myriam Taverna
- PNAS, Institut Galien de Paris-Sud, Faculté de Pharmacie, Université Paris-Sud, CNRS UMR8612, 5 Rue JB Clément, Chatenay Malabry, France
| | | | - Christian Latremouille
- Service Chirurgie Cardique et Laboratoire de Recherches Biochirugicales (Fondation Carpentier), AH-HP, Georges Pompidou European Hospital, F-75015, Paris, France
| | - Francesco Migliavacca
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - Gabriele Dubini
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | | | - Alain Carpentier
- Service Chirurgie Cardique et Laboratoire de Recherches Biochirugicales (Fondation Carpentier), AH-HP, Georges Pompidou European Hospital, F-75015, Paris, France
| | - David M Smadja
- Service D'Hématologie et Laboratoire de Recherches Biochirugicales (Fondation Carpentier), AH-HP, Georges Pompidou European Hospital, F-75015, Paris, France
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Malchesky PS. Artificial Organs 2018: A Year in Review. Artif Organs 2019; 43:288-317. [PMID: 30680758 DOI: 10.1111/aor.13428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 01/22/2019] [Indexed: 12/24/2022]
Abstract
In this Editor's Review, articles published in 2018 are organized by category and summarized. We provide a brief reflection of the research and progress in artificial organs intended to advance and better human life while providing insight for continued application of these technologies and methods. Artificial Organs continues in the original mission of its founders "to foster communications in the field of artificial organs on an international level." Artificial Organs continues to publish developments and clinical applications of artificial organ technologies in this broad and expanding field of organ Replacement, Recovery, and Regeneration from all over the world. Peer-reviewed special issues this year included contributions from the 13th International Conference on Pediatric Mechanical Circulatory Support Systems and Pediatric Cardiopulmonary Perfusion edited by Dr. Akif Undar, and the 25th Congress of the International Society for Mechanical Circulatory Support edited by Dr. Marvin Slepian. Additionally, many editorials highlighted the worldwide survival differences in hemodialysis and perspectives on mechanical circulatory support and stem cell therapies for cardiac support. We take this time also to express our gratitude to our authors for offering their work to this journal. We offer our very special thanks to our reviewers who give so generously of time and expertise to review, critique, and especially provide meaningful suggestions to the author's work whether eventually accepted or rejected. Without these excellent and dedicated reviewers the quality expected from such a journal could not be possible. We also express our special thanks to our Publisher, John Wiley & Sons for their expert attention and support in the production and marketing of Artificial Organs. We look forward to reporting further advances in the coming years.
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