Design of Mechanical Beariings in Cardiac Assist Devices
Author: Said Jahanmir
Publisher:
Published: 2016-07-04
Total Pages: 86
ISBN-13: 9780791860427
DOWNLOAD EBOOK"The American Society of Mechanical Engineers."
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Magnetic Bearings for Mechanical Cardiac Assist Devices
Author: Steven Day
Publisher: Momentum Press
Published: 2015
Total Pages: 57
ISBN-13: 9780791860410
DOWNLOAD EBOOK"Magnetic bearings are mechatronic devices that produce contact-free electromagnetic force to support a load, such as a moving train or a spinning rotor. Compared to traditional bearings, magnetic bearings offer several advantages: no friction, low heat generation, no required lubrication, quiet operation, and fast and stable rotation. Because of these reasons, magnetic bearings have been used in rotary ventricular assist devices (VADs) to increase design life, reduce or eliminate material wear and bearing maintenance, as well as to increase biocompatibility by eliminating high fluid stresses and heat generation, both of which are associated with hemolysis, platelet activation and aggregation, and thrombus growth. In this monograph, magnetic bearings and their application in VADs are introduced. First, the operating principles of magnetic bearings are introduced. Typical structures of passive bearings, which are comprised solely of permanent magnets, and active magnetic bearings (AMB), which make use of electromagnets and position sensors to control the position of the rotor, are described. We include some description of all the components of a typical AMB system, including actuator, position sensor, controller, and amplifier, as well as different structures of electromagnet actuators, coils design, and iron selection. A range of position sensors, including those typically used in blood pumps, as well as self-sensing bearings are discussed. The basics of the hardware and the software (control laws) that comprise a typical magnetic bearing system are described. A section describes the performance considerations of magnetic bearings and the effect on the overall performance of an assist device that uses magnetic bearings. Lastly, the magnetic suspension of existing VADs with magnetic bearings are described: Berlin Heart INCOR, Heartware HVAD, WorldHeart Levacor and MiFlow, Terumo Duraheart, PediaFlow, MiTiHeart, and LEV-VAD."--Abstract.
Magnetic Bearings for Assist Devices
Author: Stephen Day
Publisher: Momentum Press
Published: 2015-12-16
Total Pages: 63
ISBN-13: 1606509209
DOWNLOAD EBOOKThis book introduces magnetic bearings--mechatronic devices that produce contact-free electromagnetic force to support a load, such as a moving train or a spinning rotor. Compared to traditional bearings, magnetic bearings offer several advantages: no friction, low heat generation, no required lubrication, quiet operation, and fast and stable rotation. For these reasons, magnetic bearings have been used in rotary ventricular assist devices (VADs) to increase design life, reduce or eliminate material wear and bearing maintenance, as well as to increase biocompatibility by eliminating high fluid stresses and heat generation, both of which are associated with hemolysis, platelet activation and aggregation, and thrombus growth. The book covers the principles of these bearings, how they are used in integrated control and electronics systems, and useful information on several major brands of current assist devices.
Mechanical Circulatory Support: A Companion to Braunwald's Heart Disease Ebook
Author: Robert L. Kormos
Publisher: Elsevier Health Sciences
Published: 2011-08-30
Total Pages: 367
ISBN-13: 1455727008
DOWNLOAD EBOOKMechanical Circulatory Support, by Drs. Robert L. Kormos and Leslie W. Miller, provides the clinically relevant information you need to effectively use this therapy to treat and manage end-stage cardiovascular disease. In this Companion to Braunwald’s Heart Disease, the world’s most prominent experts in mechanical circulatory support (MCS) cover basic science, device construction, clinical applications, socioeconomic implications, future directions, and more. Stay on top of hot topics - including innovative devices like continuous flow pumps, next-generation centrifugal pumps, and total artificial hearts; MCS for pediatric and congenital heart disease; cellular, molecular, genomic, and functional changes that occur in the failing heart in response to MCS; and Interagency Registry of Mechanically Assisted Circulatory Support (INTERMACS) as a tool to track and advance clinical practice. Tap into discussions of hot topics in mechanical circulatory support (MCS), including current types of devices and clinical settings for MCS; MCS for pediatric and congenital heart disease; myocardial recovery, regenerative therapy, bleeding and thrombosis with MCS; cellular, molecular, genomic, and functional changes that occur in the failing heart in response to MCS; and Interagency Registry of Mechanically Assisted Circulatory Support (INTERMACS) as a tool to track and advance clinical practice. Get a complete picture of the role of mechanical circulatory support in treatment through coverage of device construction, clinical applications, socioeconomic implications, and future directions. Master the pathophysiology and rationale of treatment with discussions of basic science in addition to clinically-relevant information and current clinical practice guidelines. Apply the expertise of the world’s most prominent leaders in mechanical circulatory support.
Design Manufacture and Performance Assessment of a Ventricular Assist Device Bearing System
Author:
Publisher:
Published: 2015
Total Pages:
ISBN-13:
DOWNLOAD EBOOKMechanism of Artificial Heart
Author: Takashi Yamane
Publisher: Springer
Published: 2016-02-19
Total Pages: 81
ISBN-13: 4431558314
DOWNLOAD EBOOKThis book first describes medical devices in relation to regenerative medicine before turning to a more specific topic: artificial heart technologies. Not only the pump mechanisms but also the bearing, motor mechanisms, and materials are described, including expert information. Design methods are described to enhance hemocompatibility: main concerns are reduction of blood cell damage and protein break, as well as prevention of blood clotting. Regulatory science from R&D to clinical trials is also discussed to verify the safety and efficacy of the devices.
Mechanical Circulatory Support: A Companion to Braunwald's Heart Disease Ebook
Author: James K. Kirklin
Publisher: Elsevier Health Sciences
Published: 2019-07-09
Total Pages: 314
ISBN-13: 0323566979
DOWNLOAD EBOOKOffering comprehensive, authoritative coverage of mechanical circulatory support (MCS), this fully revised companion to Braunwald’s Heart Disease provides the clinically relevant information you need to effectively use this therapy to treat and manage end-stage heart failure. New editors and authors – experts in both cardiology and cardiovascular surgery – bring you fully up to date with the newest technology and devices, as well as basic science, clinical applications, adverse event monitoring and management, socioeconomic implications, future directions, and more. Covers all of the newest techniques, including new-generation devices. Discusses the management of common patient problems, highlighting cautions and outcomes, as well as pathophysiology and rationale for treatment. Brings you up to speed with the latest coverage of ventricular assist devices (VAD), extracorporeal membrane oxygenation (ECMO), next-generation centrifugal pumps, and total artificial hearts. Provides a complete clinical perspective of the latest scientific breakthroughs and analysis of the current literature. Includes coverage of the most recent guidelines and protocols, including MCS for pediatric and congenital heart disease; the Interagency Registry of Mechanically Assisted Circulatory Support (INTERMACS) as a tool to track and advance clinical practice; and cellular, molecular, genomic, and functional changes that occur in the failing heart in response to MCS. Presents practical evidence from the registry of thousands of cases to guide cardiologists, cardiovascular surgeons, emergency physicians, primary care physicians, and other team members on the best management course to follow for each particular patient.
Mechanical Circulatory and Respiratory Support
Author: Shaun D. Gregory
Publisher: Academic Press
Published: 2017-09-19
Total Pages: 854
ISBN-13: 0128104929
DOWNLOAD EBOOKMechanical Circulatory and Respiratory Support is a comprehensive overview of the past, present and future development of mechanical circulatory and respiratory support devices. Content from over 60 internationally-renowned experts focusses on the entire life-cycle of mechanical circulatory and respiratory support – from the descent into heart and lung failure, alternative medical management, device options, device design, implantation techniques, complications and medical management of the supported patient, patient-device interactions, cost effectiveness, route to market and a view to the future. This book is written as a useful resource for biomedical engineers and clinicians who are designing new mechanical circulatory or respiratory support devices, while also providing a comprehensive guide of the entire field for those who are already familiar with some areas and want to learn more. Reviews of the most cutting-edge research are provided throughout each chapter, along with guides on how to design new devices and which areas require specific focus for future research and development. Covers a variety of disciplines, from anatomy of organs and evolution of cardiovascular devices, to their clinical applications and the manufacturing and marketing of devices Provides engineering and clinical perspectives to assist readers in the design of a market appropriate device Discusses history, design, usage, and development of mechanical circulatory and respiratory support systems
Bioengineering and Biomaterials in Ventricular Assist Devices
Author: Eduardo Guy Perpétuo Bock
Publisher: CRC Press
Published: 2021-10-07
Total Pages: 363
ISBN-13: 1000462854
DOWNLOAD EBOOKOften associated with artificial hearts, ventricular assist devices (VADs) are blood pumps that can provide circulatory assistance to the left ventricle, the right ventricle, or both. Bioengineering and Biomaterials in Ventricular Assist Devices reviews constructive details of VADs and the biomaterials used in their development and support. FEATURES Establishes an area of intersection between engineering and medicine Shows process development from mechanical design to automation and control Discusses biofunctional materials, tribology in ceramic biomaterials, biosensors, and surface engineering and blood This text is aimed at advanced students, researchers, and practicing engineers conducting work on VADs and will be of interest to a broad interdisciplinary group, including bioengineers, materials engineers, chemical engineers, mechanical engineers, and electrical engineers.
Mechanical Support for Heart Failure
Author: Jamshid H. Karimov
Publisher: Springer Nature
Published: 2020-09-04
Total Pages: 734
ISBN-13: 3030478092
DOWNLOAD EBOOKThis book provides a comprehensive overview of mechanical circulatory support of the failing heart in adults and children. The book uniquely combines engineering knowledge and the clinician’s perspective into a single resource, while also providing insights into current and future development of mechanical circulatory support technology, such as ventricular assist devices, the total artificial heart and catheter-based technologies for heart failure. Topics featured in this book include: The history of mechanical circulatory device development. Fundamentals of hemodynamics support. Clinical management of mechanical circulatory devices. Surgical implantation techniques. Current limitations of device therapies in advanced heart failure. Advanced and novel devices in the development pipeline. Opportunities for advancement in the field. Mechanical Support for Heart Failure: Current Solutions and New Technologies is a must-have resource for not only physicians, residents, fellows, and medical students in cardiology and cardiac surgery, but also clinical and basic researchers in biomedical engineering with an interest in mechanical circulatory support, heart failure, and new technological applications in medicine.
