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Karigyo CJT, Fonseca JWG, Boscarato AG, Matsumoto MMS, Andrade AJP. Ventricular Assist Device Research and Development in Brazil: A Long and Promising Relationship Between Medicine and Engineering. Braz J Cardiovasc Surg 2023; 38:e20230074. [PMID: 37801429 PMCID: PMC10550219 DOI: 10.21470/1678-9741-2023-0074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2023] Open
Affiliation(s)
- Carlos J. T. Karigyo
- Centro de Engenharia em Assistência Circulatória,
Instituto Dante Pazzanese de Cardiologia, São Paulo, São Paulo, Brazil
- Programa de Pós-graduação em
Medicina/Tecnologia e Intervenção em Cardiologia, Universidade de
São Paulo, São Paulo, São Paulo, Brazil
| | - Jeison W. G. Fonseca
- Centro de Engenharia em Assistência Circulatória,
Instituto Dante Pazzanese de Cardiologia, São Paulo, São Paulo, Brazil
- Programa de Pós-graduação em
Medicina/Tecnologia e Intervenção em Cardiologia, Universidade de
São Paulo, São Paulo, São Paulo, Brazil
| | - André G. Boscarato
- Programa de Pós-graduação em Ciência
Animal com Ênfase em Produtos Bioativos, Universidade Paranaense, Umuarama,
Paraná, Brazil
- Clínica Cirúrgica de Grandes Animais, Hospital
Veterinário, Universidade Paranaense, Umuarama, Paraná, Brazil
| | - Mônica M. S. Matsumoto
- Medical Electrical Devices Laboratory, Electronics Engineering
Division, Instituto Tecnológico de Aeronáutica, São José
dos Campos, São Paulo, Brazil
| | - Aron J. P. Andrade
- Centro de Engenharia em Assistência Circulatória,
Instituto Dante Pazzanese de Cardiologia, São Paulo, São Paulo, Brazil
- Programa de Pós-graduação em
Medicina/Tecnologia e Intervenção em Cardiologia, Universidade de
São Paulo, São Paulo, São Paulo, Brazil
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Bock E, Pfleging W, Tada D, Macedo E, Premazzi N, Sá R, Solheid J, Besser H, Andrade A. Laser-Treated Surfaces for VADs: From Inert Titanium to Potential Biofunctional Materials. BME FRONTIERS 2022; 2022:9782562. [PMID: 37850160 PMCID: PMC10521651 DOI: 10.34133/2022/9782562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/17/2022] [Indexed: 10/19/2023] Open
Abstract
Objective. Laser-treated surfaces for ventricular assist devices. Impact Statement. This work has scientific impact since it proposes a biofunctional surface created with laser processing in bioinert titanium. Introduction. Cardiovascular diseases are the world's leading cause of death. An especially debilitating heart disease is congestive heart failure. Among the possible therapies, heart transplantation and mechanical circulatory assistance are the main treatments for its severe form at a more advanced stage. The development of biomaterials for ventricular assist devices is still being carried out. Although polished titanium is currently employed in several devices, its performance could be improved by enhancing the bioactivity of its surface. Methods. Aiming to improve the titanium without using coatings that can be detached, this work presents the formation of laser-induced periodic surface structures with a topology suitable for cell adhesion and neointimal tissue formation. The surface was modified by femtosecond laser ablation and cell adhesion was evaluated in vitro by using fibroblast cells. Results. The results indicate the formation of the desired topology, since the cells showed the appropriate adhesion compared to the control group. Scanning electron microscopy showed several positive characteristics in the cells shape and their surface distribution. The in vitro results obtained with different topologies point that the proposed LIPSS would provide enhanced cell adhesion and proliferation. Conclusion. The laser processes studied can create new interactions in biomaterials already known and improve the performance of biomaterials for use in ventricular assist devices.
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Affiliation(s)
- Eduardo Bock
- Laboratory of Bioengineering and Biomaterials, Federal Institute of Technology in Sao Paulo (IFSP), Sao PauloBrazil
- Center of Engineering in Circulatory Assistance, Institute Dante Pazzanese of Cardiology (IDPC), Sao Paulo, Brazil
| | - Wilhelm Pfleging
- Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Dayane Tada
- Federal University of Sao Paulo (UNIFESP), Sao Jose dos Campos, Brazil
| | - Erenilda Macedo
- Federal University of Sao Paulo (UNIFESP), Sao Jose dos Campos, Brazil
| | - Nathalia Premazzi
- Laboratory of Bioengineering and Biomaterials, Federal Institute of Technology in Sao Paulo (IFSP), Sao PauloBrazil
| | - Rosa Sá
- Center of Engineering in Circulatory Assistance, Institute Dante Pazzanese of Cardiology (IDPC), Sao Paulo, Brazil
- National Institute for Space Research (INPE), Sao Jose dos Campos, Brazil
| | - Juliana Solheid
- Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Heino Besser
- Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Aron Andrade
- Center of Engineering in Circulatory Assistance, Institute Dante Pazzanese of Cardiology (IDPC), Sao Paulo, Brazil
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WU GUANGHUI, XU CHUANGYE, LIU XIUJIAN, LIN CHANGYAN, YANG LIN, LI HAIYANG, HOU XIAOTONG, CHEN CHEN, YANG PENG. HYDRAULICS AND IN VITRO HEMOLYSIS TEST OF A MAGLEV IMPLANTABLE VENTRICULAR ASSIST DEVICE. J MECH MED BIOL 2017. [DOI: 10.1142/s0219519417400231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A small implantable centrifugal left ventricular assist device, the CH-VAD (CH Biomedical Inc, JiangSu, China), featuring a magnetically levitated impeller is under development. The goal of this study is to validate hydrodynamic performance and hemocompatibility of the pump through in vitro studies. The hydraulic performance was quantified experimentally by using in vitro circulation loop system, and it turned out that the pump could deliver 5[Formula: see text]L/min under a pressure of 100[Formula: see text]mmHg at a rotational speed of approximate 3400[Formula: see text]rpm. A series of in vitro tests were established according to ASTM F1841, the standard practice for the assessment of hemolysis in continuous-flow blood pumps. The results showed that the average normalized index of hemolysis (NIH) value of the VAD was 0.0007[Formula: see text][Formula: see text][Formula: see text]0.0003[Formula: see text]mg/dL. The magnetic levitation left ventricular assist device (LVAD) has good hemolytic performance and stable mechanical property. These acceptable performance results supported proceeding initial acute animal testing conditions.
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Affiliation(s)
- GUANGHUI WU
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, AnZhen Str. 2, ChaoYang District, Beijing 100029, China
| | - CHUANGYE XU
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, AnZhen Str. 2, ChaoYang District, Beijing 100029, China
| | - XIUJIAN LIU
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, AnZhen Str. 2, ChaoYang District, Beijing 100029, China
| | - CHANGYAN LIN
- Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, AnZhen Str. 2, ChaoYang District, Beijing 100029, China
| | - LIN YANG
- College of Life Science and Bio-Engineering, Beijing University of Technology, PingLeYuan Str. 100, ChaoYang District, Beijing 100029, China
| | - HAIYANG LI
- Beijing Anzhen Hospital, Capital Medical University, AnZhen Str. 2, ChaoYang District, Beijing 100029, China
| | - XIAOTONG HOU
- Beijing Anzhen Hospital, Capital Medical University, AnZhen Str. 2, ChaoYang District, Beijing 100029, China
| | - CHEN CHEN
- CH Biomedical Incorporation, Suzhou Industrial Park East Building (2-6), Room 202, Jiangsu 215125, China
| | - PENG YANG
- CH Biomedical Incorporation, Suzhou Industrial Park East Building (2-6), Room 202, Jiangsu 215125, China
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Lopes G, Bock E, Gómez L. Numerical Analyses for Low Reynolds Flow in a Ventricular Assist Device. Artif Organs 2016; 41:E30-E40. [PMID: 27859372 DOI: 10.1111/aor.12776] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/25/2016] [Accepted: 05/05/2016] [Indexed: 11/29/2022]
Abstract
Scientific and technological advances in blood pump developments have been driven by their importance in cardiac patient treatments and in the expansion of life quality in assisted people. To improve and optimize the design and development, numerical tools were incorporated into the analyses of these mechanisms and have become indispensable in their advances. This study analyzes the flow behavior with low impeller Reynolds number, for which there is no consensus on the full development of turbulence in ventricular assist devices (VAD). For supporting analyses, computational numerical simulations were carried out in different scenarios with the same rotation speed. Two modeling approaches were applied: laminar flow and turbulent flow with the standard, RNG and realizable κ - ε; the standard and SST κ - ω models; and Spalart-Allmaras models. The results agree with the literature for VAD and the range for transient flows in stirred tanks with an impeller Reynolds number around 2800 for the tested scenarios. The turbulent models were compared, and it is suggested, based on the expected physical behavior, the use of κ-ε RNG, standard and SST κ-ω, and Spalart-Allmaras models to numerical analyses for low impeller Reynolds numbers according to the tested flow scenarios.
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Affiliation(s)
- Guilherme Lopes
- UFTM-Environmental Engineering, Univerdecidade, Uberaba, Minas Gerais, Brazil
| | - Eduardo Bock
- UFTM-Environmental Engineering, Univerdecidade, Uberaba, Minas Gerais, Brazil
| | - Luben Gómez
- UFTM-Environmental Engineering, Univerdecidade, Uberaba, Minas Gerais, Brazil
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Malchesky PS. Dr. Aron Andrade Selected as Co-Editor forArtificialOrgans. Artif Organs 2013. [DOI: 10.1111/aor.12238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Uebelhart B, da Silva BU, Fonseca J, Bock E, Leme J, da Silva C, Leão T, Andrade A. Study of a centrifugal blood pump in a mock loop system. Artif Organs 2013; 37:946-9. [PMID: 24237361 DOI: 10.1111/aor.12228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
An implantable centrifugal blood pump (ICBP) is being developed to be used as a ventricular assist device (VAD) in patients with severe cardiovascular diseases. The ICBP system is composed of a centrifugal pump, a motor, a controller, and a power supply. The electricity source provides power to the controller and to a motor that moves the pump's rotor through magnetic coupling. The centrifugal pump is composed of four parts: external conical house, external base, impeller, and impeller base. The rotor is supported by a pivot bearing system, and its impeller base is responsible for sheltering four permanent magnets. A hybrid cardiovascular simulator (HCS) was used to evaluate the ICBP's performance. A heart failure (HF) (when the heart increases beat frequency to compensate for decrease in blood flow) was simulated in the HCS. The main objective of this work is to analyze changes in physiological parameters such as cardiac output, blood pressure, and heart rate in three situations: healthy heart, HF, and HF with left circulatory assistance by ICBP. The results showed that parameters such as aortic pressure and cardiac output affected by the HF situation returned to normal values when the ICBP was connected to the HCS. In conclusion, the test results showed satisfactory performance for the ICBP as a VAD.
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Affiliation(s)
- Beatriz Uebelhart
- Dante Pazzanese Institute of Cardiology, São Paulo, São Paulo, Brazil
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Leme J, da Silva C, Fonseca J, da Silva BU, Uebelhart B, Biscegli JF, Andrade A. Centrifugal blood pump for temporary ventricular assist devices with low priming and ceramic bearings. Artif Organs 2013; 37:942-5. [PMID: 24219168 DOI: 10.1111/aor.12231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new model of centrifugal blood pump for temporary ventricular assist devices has been developed and evaluated. The design of the device is based on centrifugal pumping principles and the usage of ceramic bearings, resulting in a pump with reduced priming (35 ± 2 mL) that can be applied for up to 30 days. Computational fluid dynamic (CFD) analysis is an efficient tool to optimize flow path geometry, maximize hydraulic performance, and minimize shear stress, consequently decreasing hemolysis. Initial studies were conducted by analyzing flow behavior with different impellers, aiming to determine the best impeller design. After CFD studies, rapid prototyping technology was used for production of pump prototypes with three different impellers. In vitro experiments were performed with those prototypes, using a mock loop system composed of Tygon tubes, oxygenator, digital flow meter, pressure monitor, electronic driver, and adjustable clamp for flow control, filled with a solution (1/3 water, 1/3 glycerin, 1/3 alcohol) simulating blood viscosity and density. Flow-versus-pressure curves were obtained for rotational speeds of 1000, 1500, 2000, 2500, and 3000 rpm. As the next step, the CFD analysis and hydrodynamic performance results will be compared with the results of flow visualization studies and hemolysis tests.
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Affiliation(s)
- Juliana Leme
- Dante Pazzanese Institute of Cardiology, São Paulo, São Paulo, Brazil
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Abstract
In this Editor's Review, articles published in 2011 are organized by category and briefly summarized. As the official journal of The International Federation for Artificial Organs, The International Faculty for Artificial Organs, and the International Society for Rotary Blood Pumps, 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. 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 would not be possible. We also express our special thanks to our Publisher, Wiley-Blackwell, for their expert attention and support in the production and marketing of Artificial Organs. In this Editor's Review, that historically has been widely well-received by our readership, we aim to provide a brief reflection of the currently available worldwide knowledge that is intended to advance and better human life while providing insight for continued application of technologies and methods of organ replacement, recovery, and regeneration. We look forward to recording further advances in the coming years.
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Affiliation(s)
- Paul S Malchesky
- Artificial Organs Editorial Office, 10 West Erie Street, Painesville, OH 44077, USA.
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