Mechanical Heart Valves
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ADVANCING THE TECHNOLOGY OF BILEAFLET MECHANICAL HEART VALVES $53.58 No Synopsis Available |
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Defective Prosthetic Heart Valves $108.33 Blood flow through a defective bileaflet mechanical heart valve was modeled using steady and pulsatile blood flow conditions under several flow and malfunction severity conditions. The calculations used Reynoldsaveraged NavierStokes equations with Newtonian blood properties. The results showed that the flow upstream and downstream of the defective valve is highly influenced by malfunction severity and this resulted in a misleading improvement in the correlation between simulated Doppler echocardiographic and catheter transvalvular pressure gradients. In this study, two potential noninvasive parameters were proposed using Doppler echocardiography and phase contrast magnetic resonance imaging, for an early detection of mechanical heart valve malfunction. Finally, the relation between the coherent structures downstream of the valve and the valve malfunction was shown and the significant impact of valve malfunction on platelet activation and as a consequence, on thrombus formation was also shown. Author: Smadi, Othman Binding Type: Paperback Number of Pages: 108 Publication Date: 2009/06/01 Language: English Dimensions: 9.00 x 6.00 x 0.26 inches |
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Fluke Biomedical 17156 Mechanical Fetal Heart Cable $109.99 Fluke Biomedical 17156 Mechanical Fetal Heart Cable |
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Mechanical Heart $4.99 We believe it is important to preserve what makes music special, and make it easy to craft listening experiences. At MOG, browse millions songs and play them instantly. Or just turn on radio where you can stop and replay songs. You can also create playlists for any occasion, and even download songs to your mobile. We are dedicated to employing the cleanest but most powerful technology so you can enjoy music as much as ever. |
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Jabsco Pump Service Kits Repair Valves $41.99 Jabsco Pump Service Kits Repair Valves . These kits simple mechanical characteristics ensure trouble-free running and long life. |
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Mechanical Hands Electric Heart $4.99 For everything you do, there’s a song that hits the spot. MOG brings them all to you: a world of music on demand, unlimited mobile downloads and ways to discover music free from the limitations of Pandora. The music you love, with you everywhere you go. |
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The Illustrated Compendium of Prosthetic Heart Valves $38.03 No Synopsis Available |
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Mechanical Circulatory Support: A Companion to Braunwald’s Heart Disease $149.6 Mechanical 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. You’ll also have access the fully searchable text online at www.expertconsult.com. |
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The Illustrated Compendium of Prosthetic Heart Valves [With CDROM] $21.74 The creativity and perseverance of those who have tried and failed to find the perfect heart valve is memorialized in this comprehensive survey. Chronologically describing each valve developed in the quest to prolong the lives of heart valve disease victims, the account reveals the design of each mechanism, the endless search for materials that match and survive in the conditions of the human body, and the people behind the innovation. |
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Mechanical Circulatory Support for Heart Failure $155.95 No Synopsis Available |
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Sloan MIX-60-A Mechanical Mixing Valve $30.64 Sloan MIX-60-A Mechanical Mixing Valve Below Deck Mechanical Water Mixing Valve for use with a single Sloan Optima faucet. Sloan MIX-60-A Mechanical Mixing Valve Features: Designed to install under the lavatory Installs in place of the Tee fitting supplied with the faucet prior to the solenoid valve Equipped with integral check valves at inlets 3/8 compression fittings on inlets and outlet Compression sleeves and nuts included Lever dial adjustment with lock screw: COLD-HOT Brass construction Chrome plated finish |
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Consolidated Pop Safety Valves: 1910 $34.61 Introduction THE Consolidated Safety Valve Company has within the last two years inaugurated two exceedingly important movements in the safety valve practice of this country movements which are causing universal modifications of design, and, for the first time in the history of engineering, are putting the methods of safety valve rating and specification upon a sound basis. This has, of course, required exhaustive testing and research, in conducting which this Company has spared no expense, deliberately adopting the policy of giving the results freely to the engineering public. This policy has obtained for the Company in this work the co-operation of railroads, of station- ary and marine interests, and of eminent engineers, adding much to the broad application and value of the results obtained. The movements referred to are first, for the rating and specifying of safety valves according to their actual relieving capacities and, second, for increasing their efficiency by modifications in design which make possible the obtaining of larger capacities, and a cleaner, more positive action. .X ITY y Safety Valve Capacity J account of certain of the elaborate tests and extensive research work, conducted by this Company, showing the apparatus A developed, the methods employed and results obtained, has been published in a pamphlet entitled Safety Valve Capacity, which will be sent upon application to anyone interested in this subject. Because of this supplementary publication, the following account of the work will be brief. The function of a safety valve is to prevent the pressure in the boiler, to which it is applied, from rising above a definite point to do this automatically, and under themost severe conditions which can arise in service. For this the valve, or valves, must have a reliev- ing capacity at least equal to the boiler evaporation, under these con- ditions. If it has not this capacity, the boiler pressure will continue to rise, although the valve is blowing, resulting in strain to the boiler and danger of explosion, consequent to over-pressure. Thus, with the exception of a requisite mechanical the most vital factor in reliability, a safety valve is its capacity. Two factors in a safety valve geometrically determine the area of discharge and hence the relieving capacity. These are the diame- ter of the inlet opening at the seat, and the valve lift. The former is the nominal valve size the latter is the amount the valve disc lifts vertically from the seat when in action. The rules for calculating the size of valves to be placed on boilers, which do not include a term for this valve lift, or an equivalent such as a term for the effective area of discharge assume, in their derivation, a lift for each size valve. Nearly all existing rules and formulae are of this kind, which rate all valves of a given nominal size as of the same capacity. To find what lifts valves actually have in practice, and thus test the truth or error of this assumption, t |
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The Diseases of the Heart and the Aorta $37.8 Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: 255 CHAPTER III. DISEASES OF THE M08CULAR STRUCTURES OF THE HEART. The parietes of the heart are probably liable to all the vital and organic changes observed in muscular structures. They may exhibit hypertrophy or atrophy, fatty degeneration, and hetero- logous deposits, or become the seat of changes which are secondary to various essential diseases, but especially typhus fever. Their functional diseases, also, seem analagous to those of muscles in general, as we observe augmented or diminished contractility, irregular action, and even a spastic state. Further, we find that a weakened or paralysed condition is produced by the effects of irritation of structures with which they are in connexion; this, as has been already noticed, may be the cause of death in pericarditis; and there appear reasons for believing that a purely’ nervous paralysis may affect one or more of the cavities of the heart. Again, the muscles of the heart may be the seat of inflammation myocarditis), and although this condition is rare, it is probably more frequent than inflammation of the voluntary muscles. It is still to be determined whether the cavities of the heart are liable to change from mechanical causes alone; whether dilatation, for example, is a purely mechanical result of obstruction to the exit of the blood, or whether for its production in valvular disease there is required not only obstruction, but a weakened condition of the heart. As the symptoms of valvular diseases are really those of alterations of the cavities of the heart, we may now properly examine the latter class of affections, premising that although dilatation and hypertrophy so frequently co-exist with alterations of the valves, yet that they occur either as independent affections, or with an amount of valvul… |
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I Heart My Mechanic Mechanical engineer Hooded Sweatshirt by CafePress $45 Visit our Job Shirts for more I Heart My Mechanic shirts,I Heart My Mechanic t shirts,job and office mugs, hats,stickers, pins and many more Mechanic clo Mechanical engineer Hooded Sweatshirt Tee, TShirt, Shirt The hoodie: the perfect utilitarian piece of clothing. Leave your hat and scarf at home Stay warm and comfy in your Pullover Hooded Sweatshirt. This hoodie is constructed with a cotton/polyester blend – both durable and comfortable.Heavyweight 90 |
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Pressure Relief Valves: ASME and API Code Simplified $98.67 Within the boiler, piping and pressure vessel industry, pressure relief devices are considered one of the most important safety components. These Devices are literally the last line of defense against catastrophic failure or even lose of life. Written in plain language, this fifth book in the ASME Simplified series addresses the various codes and recommended standards of practice for the maintenance and continued operations of pressure relief valves as specified by the American Society of Mechanical Engineers and the American Petroleum Institute. Covered in this book are: preventive maintenance procedures, methods for evaluation of mechanical components and accepted methods for cleaning, adjusting and lubricating various components to assure continued operation and speed performance as well as procedures for recording and evaluating these items. |
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Symmons 4-10A Mechanical Mixing Valve $55.47 Symmons 4-10A Mechanical Mixing Valve Founded in 1939, Symmons Industries is a premier manufacturer of commercial and residential plumbing products including trademark pressure-balancing tub/shower systems, single and two-handle faucets for kitchen and bath, water temperature control valves and systems, metering and sensor-activated faucets and showers and other plumbing specialties. Symmons 4-10A Mechanical Mixing Valve Features: Symmons mechanical mixing valve for tempered water supply to an individual faucet Includes 3/8″ compression connections and integral checks Vandal resistant temperature adjustment Chrome finish Supply stops and piping to and from mechanical mixing valve not supplied To supply tempered water to a single supply faucet 3/8″ compression connections |
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Symmons 4-10B Mechanical Mixing Valve $71.44 Symmons 4-10B Mechanical Mixing Valve Founded in 1939, Symmons Industries is a premier manufacturer of commercial and residential plumbing products including trademark pressure-balancing tub/shower systems, single and two-handle faucets for kitchen and bath, water temperature control valves and systems, metering and sensor-activated faucets and showers and other plumbing specialties. Symmons 4-10B Mechanical Mixing Valve Features: Symmons mechanical mixing valve for tempered water supply to an individual faucet Includes 3/8″ compression connections and integral checks Vandal resistant temperature adjustment Chrome finish Supply stops and piping to and from mechanical mixing valve not supplied To supply tempered water to the hot inlet of a two supply faucet |
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Valves $4.99 We believe it is important to preserve what makes music special, and make it easy to craft listening experiences. At MOG, browse millions songs and play them instantly. Or just turn on radio where you can stop and replay songs. You can also create playlists for any occasion, and even download songs to your mobile. We are dedicated to employing the cleanest but most powerful technology so you can enjoy music as much as ever. |
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Absolute Music Mechanical Reproduction $13.79 Recordings are now the primary way we hear classical music especially the more abstract styles of "absolute" instrumental music. In this original provocative book Arved Ashby argues that recording technology has transformed our understanding of art music. Contesting the laments of nostalgic critics Ashby sees recordings as socially progressive and instruments of a musical vernacular but also finds that recording and absolute music actually involve similar notions of removing sound from context. He takes stock of technology’s impact on classical music addressing the questions at the heart of the issue. This erudite yet concise study reveals how mechanical reproduction has transformed classical musical culture and the very act of listening breaking down aesthetic and generational barriers and mixing classical music into the soundtrack of everyday life.Recordings are now the primary way we hear classical music especially the more abstract styles of "absolute" instrumental music. In this original provocative book Arved Ashby argues that recording technology has transformed our understanding of art music. Contesting the laments of nostalgic critics Ashby sees recordings as socially progressive and instruments of a musical vernacular but also finds that recording and absolute music actually involve similar notions of removing sound from context. He takes stock of technology’s impact on classical music addressing the questions at the heart of the issue. This erudite yet concise study reveals how mechanical reproduction has transformed classical musical culture and the very act of listening breaking down aesthetic and generational barriers and mixing classical music into the soundtrack of everyday life.Recordings are now the primary way we hear classical music especially the more abstract styles of "absolute" instrumental music. In this original provocative book Arved Ashby argues that recording technology has transformed our understanding of art music. Contesting the laments of nostalgic critics Ashby sees recordings as socially progressive and instruments of a musical vernacular but also finds that recording and absolute music actually involve similar notions of removing sound from context. He takes stock of technology’s impact on classical music addressing the questions at the heart of the issue. This erudite yet concise study reveals how mechanical reproduction has transformed classical musical culture and the very act of listening breaking down aesthetic and generational barriers and mixing classical music into the soundtrack of everyday life. |
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Absolute Music, Mechanical Reproduction $26.66 Recordings are now the primary way we hear classical music, especially the more abstract styles of "absolute" instrumental music. People are more likely to hear Beethoven or Brahms on an iPod than in the concert hall, and rare compositions are often available only in recorded form. In this original, provocative book, Arved Ashby argues that, just as photography redefined visual art, recording technology has transformed our understanding of art music. Contesting the laments of nostalgic critics, Ashby sees recordings as socially progressive and instruments of a musical vernacular, but also finds that recording and absolute music actually involve similar notions of removing sound from context. He takes stock of technology’s impact on classical music, addressing the questions at the heart of the issue: How have recording and digital copying and remastering changed concepts of performance and ideas of music as text? Does literal repetition corrupt the meaning of a musical work, or enable new meanings? Is music a product or a service, and how are notions of access and ownership being changed by converging media? This erudite yet concise study reveals how mechanical reproduction has transformed classical musical culture and the very act of listening, breaking down aesthetic and generational barriers and mixing classical music into the soundtrack of everyday life. |
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Mechanical Circulatory Support: Principles and Applications $92.02 An all-in-one guide to mechanical assist devices for the treatment of heart failure This complete guide addresses all of the clinical scenarios encountered by the health care team during the pre-operative, intra-operative, and post-operative periods following device implantation. In addition, it outlines the specific attributes of various technologies that are currently utilized by clinicians, giving you a practical view of how the latest devices work. You’ll also find a mini-catalog of the spectrum of current devices, complete with their technical and clinical specifications. Drawing on the latest published data and the combined global expertise of a renowned author team, "Mechanical Circulatory Support" puts the field’s most essential perspectives right at your fingertips. FEATURES: The unmatched mechanical circulatory device sourcebook, covering the physiological, technical, regulatory, and clinical aspects of ventricular assist devicesFull-color presentation features a wide range of photographs, radiographs, tables, and clearly labeled clinical and schematic illustrationsEssential insights into the physiology of heart failure, which provides a basic foundation of knowledge for understanding the role of mechanical circulatory assistance in the management of heart failure Logical two-part organization consisting of: Clinical Considerations in mechanical circulatory support, including device history/development and indications for device therapy; perioperative management; complications; and special considerations (use in infants/children, pulmonary hypertension during LVAD support, and more) Device-Specific Considerations, which provides a mini-catalog of manufacturer’s devices—from short-term devices to long-term continuous flow devices—and highlights technical and clinical specifications for each product Guide to appropriate device selection using a simplified framework in an industry that produces an increasing array of short- and long-term therapiesHelpful chapter introductions provide essential background information that places each chapter topic in its proper clinical and technical context Conclusions at the end of each chapter offer a concise summary of chapter materialFull chapter-ending references provide opportunities for further research |
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Supplement: 63107-02 Identify, Install & Maintain Valves TG – Pipeline Mechanical Level 1 Trainee Gu $26 No Synopsis Available |
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Supplement: 63204-02 Inspect & Repair Valves TG – Pipeline Mechanical Level 2 Trainee Guide, Perfect $26 No Synopsis Available |
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Advancing the Technology of Bileaflet Mechanical Heart Valves $550.18 New – Mechanical valves, and in particular, bileaflet mechanical valves, have made considerable strides in durability and haemodynamic performance. However, biocompatibility in terms of thromboembolism, thrombosis and haemolysis has remained an area where improvement is needed. This discussion seeks to advance these areas of prosthetic valve function and provide clinical experience with an open pivot, bileaflet mechanical valve. |
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Advancing the Technology of Bileaflet Mechanical Heart Valves $223.86 Used – Over the past 15 years, mechanical valves, and in particular, bileaflet mechanical valves, have made considerable strides in durability and hemodynamic per- formance. However, biocompatibility in terms of thrombo- embolism, thrombosis, and hemolysis has remained an area where improvement is needed. “New Development in Bileaflet Mechanical Heart Valve” discusses advances in these important areas of prosthetic valve function and provides clinical experience with a new open pivot, bileaflet |
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Advancing the Technology of Bileaflet Mechanical Heart Valves $337.84 New – Mechanical valves, and in particular, bileaflet mechanical valves, have made considerable strides in durability and haemodynamic performance. However, biocompatibility in terms of thromboembolism, thrombosis and haemolysis has remained an area where improvement is needed. This discussion seeks to advance these areas of prosthetic valve function and provide clinical experience with an open pivot, bileaflet mechanical valve. |
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Advancing the Technology of Bileaflet Mechanical Heart Valves $133.57 Used – Over the past 15 years, mechanical valves, and in particular, bileaflet mechanical valves, have made considerable strides in durability and hemodynamic per- formance. However, biocompatibility in terms of thrombo- embolism, thrombosis, and hemolysis has remained an area where improvement is needed. “New Development in Bileaflet Mechanical Heart Valve” discusses advances in these important areas of prosthetic valve function and provides clinical experience with a new open pivot, bileaflet |
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Aortic Root Surgery: The Biological Solution $129 The surgical treatment of the aortic valve and root disease, organic and ischemic mitral regurgitation, and endocarditis has made great strides. Still, there is the well-known dilemma: on the one hand the need for anticoagulation in patients with mechanical valves that otherwise guarantee long-term functioning and, on the other, the unpredictable durability of biological substitutes and of valve repair procedures which, per se, do not require anticoagulation. The choice of procedure is determined by factors such as patients’ age, metabolic and bleeding disorders, and bleeding preconditions, as well as such critical issues as the desire to bear children in young women.The book contains a collection of proceedings of The Berlin Heart Valve Symposium which was held in November 2008. It focuses on current surgical approaches to and evolving trends in aortic valve repair, aortic root and valve replacement with pulmonary autograft, aortic allograft, stentless and stented bioprostheses. Further contributions will deal with recent advances in catheter-based percutaneous and transapical techniques, ablation techniques for atrial fibrillation, tissue engineering of heart valves, multi-modality imaging, and anticoagulation. |
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Biofluid Mechanics in Cardiovascular Systems $41.5 Cutting-Edge Guide to the Understanding and Applications of Blood FlowWritten by a distinguished professor and researcher, Biofluid Mechanics in Cardiovascular Systems is one of the first books to take an interdisciplinary approach to the subject. This unique resource combines engineering principles with cardiopulmonary anatomy and physiology to give biomedical engineers essential background for designing and implementing arterial grafts, anastomosis devices, and heart valves.Detailed coverage of mechanical engineering theories and their practical application to biological functionsPresents an engineering analysis of the cardiovascular system relevant to the pathophysiology, diagnosis, prevention, and treatment of cardiovascular diseases Specifically designed for biomedical engineering professionals and students, it looks at the important area of biofluidics from an engineering perspective rather than a clinical one Explains the functional anatomy and physiology of the human heart Examines the pressure-flow relationship in arteries and the elastic properties of arterial walls Treats the application of imaging techniques on left ventricular dynamics Presents theoretical and experimental studies of pulsatile flow in large vesselsINSIDE Biofluid Mechanics in Cardiovascular Systems* Introduction and review of basic fluids concepts • Cardiopulmonary anatomy and physiology • Hematology • Structure and physiology of blood vessels • Heart mechanics • Heart valve mechanics • Pulsatile flow in large arteries • Flow and pressure measurement • Dimensional analysis and modelingLee Waite is Chair of the Department of Applied Biology and Biomedical Engineering, and Director of the Guidant/Eli Lilly and Co. Applied Life Sciences Research Center, at the Rose-Hulman Institute of Technology in Terre Haute, Indiana. He is also the president of |
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Biofluid Mechanics: The Human Circulation $115.95 Part medicine, part biology, and part engineering, biomedicine and bioengineering are by their nature hybrid disciplines. To make these disciplines work, engineers need to speak “medicine,” and clinicians and scientists need to speak “engineering.” Building a bridge between these two worlds, Biofluid Mechanics: The Human Circulation integrates fluid and solid mechanics relationships and cardiovascular physiology.The book focuses on blood rheology, steady and unsteady flow models in the arterial circulation, and fluid mechanics through native heart valves. The authors delineate the relationship between fluid mechanics and the development of arterial diseases in the coronary, carotid, and ileo-femoral arteries. They go on to elucidate methods used to evaluate the design of circulatory implants such as artificial heart valves, stents, and vascular grafts. The book covers design requirements for the development of an ideal artificial valve, including a discussion of the currently available mechanical and bioprosthetic valves. It concludes with a detailed description of common fluid mechanical measurements used for diagnosing arterial and valvular diseases as well as research studies that examine the possible interactions between hemodynamics and arterial disease. Drawing on a wide range of material, the authors cover both theory and practical applications. The book breaks down fluid mechanics into key definitions and specific properties and then uses these pieces to construct a solid foundation for analyzing biofluid mechanics in both normal and diseased conditions. |
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Biofluid Mechanics: The Human Circulation, Second Edition $99.63 New – “Examining the biodynamics of heart disease, this updated edition reviews the fluid mechanical analysis of blood flow in the human arterial circulation. It focuses on the development and progression of the disease as well as the tools and technology at the cutting edge of treatment. Applying the theory of fluid mechanical principles in human circulation, the text evaluates the design and development of circulatory implants, such as artificial heart valves, ventricular assist devices, and v |
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Biofluid Mechanics: The Human Circulation, Second Edition $57.03 Used – “Examining the biodynamics of heart disease, this updated edition reviews the fluid mechanical analysis of blood flow in the human arterial circulation. It focuses on the development and progression of the disease as well as the tools and technology at the cutting edge of treatment. Applying the theory of fluid mechanical principles in human circulation, the text evaluates the design and development of circulatory implants, such as artificial heart valves, ventricular assist devices, and |
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Biofluid Mechanics: The Human Circulation, Second Edition $96.98 Used – “Examining the biodynamics of heart disease, this updated edition reviews the fluid mechanical analysis of blood flow in the human arterial circulation. It focuses on the development and progression of the disease as well as the tools and technology at the cutting edge of treatment. Applying the theory of fluid mechanical principles in human circulation, the text evaluates the design and development of circulatory implants, such as artificial heart valves, ventricular assist devices, and |
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Biofluid Mechanics: The Human Circulation, Second Edition $56.84 New – “Examining the biodynamics of heart disease, this updated edition reviews the fluid mechanical analysis of blood flow in the human arterial circulation. It focuses on the development and progression of the disease as well as the tools and technology at the cutting edge of treatment. Applying the theory of fluid mechanical principles in human circulation, the text evaluates the design and development of circulatory implants, such as artificial heart valves, ventricular assist devices, and v |
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Biomaterials: A Tantalus Experience $119.38 Replacement of a failing hip joint or other defective organs in the human body by artificial ‘spare parts’ has significantly improved our quality of life. These spare parts have to meet a wide spectrum of mechanical, chemical and design requirements. In this book, the properties and selection of materials for such ‘spare parts’ are deduced from case studies at the start of each chapter. Hard tissue replacements (joints, long bones, dental), soft tissue (heart valves) and tissue engineering are included. The chapters also detail the three generic classes of materials: alloys (including shape memory alloys), ceramics & glasses and polymers. Separate chapters are devoted to the toxicity of implants, the metals zirconium(-zirconium oxide), tantalum, niobium and metallic glasses, soluble metals and Rapid Prototyping techniques for the fabrication of custom made prostheses. The book concludes by a chapter on water as water is always ‘there’ and conditions the interaction between body and implant. Water is the very matrix of life on earth. A peculiarity of the book is its ‘perspective view’, meaning that the authors looked behind the present biomaterials’ décor and included historical backgrounds (real and mythological), future developments, and the relation to nature (plants and geology). |
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Defective Prosthetic Heart Valves $46.45 New – Blood flow through a defective bileaflet mechanical heart valve was modeled using steady and pulsatile blood flow conditions under several flow and malfunction severity conditions. The calculations used Reynolds-averaged Navier-Stokes equations with Newtonian blood properties. The results showed that the flow upstream and downstream of the defective valve is highly influenced by malfunction severity and this resulted in a misleading improvement in the correlation between simulated Doppler |
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Defective Prosthetic Heart Valves $46.45 Used – Blood flow through a defective bileaflet mechanical heart valve was modeled using steady and pulsatile blood flow conditions under several flow and malfunction severity conditions. The calculations used Reynolds-averaged Navier-Stokes equations with Newtonian blood properties. The results showed that the flow upstream and downstream of the defective valve is highly influenced by malfunction severity and this resulted in a misleading improvement in the correlation between simulated Doppler |
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Defective Prosthetic Heart Valves $69 New – Blood flow through a defective bileaflet mechanical heart valve was modeled using steady and pulsatile blood flow conditions under several flow and malfunction severity conditions. The calculations used Reynolds-averaged Navier-Stokes equations with Newtonian blood properties. The results showed that the flow upstream and downstream of the defective valve is highly influenced by malfunction severity and this resulted in a misleading improvement in the correlation between simulated Doppler |
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Defective Prosthetic Heart Valves $69 Used – Blood flow through a defective bileaflet mechanical heart valve was modeled using steady and pulsatile blood flow conditions under several flow and malfunction severity conditions. The calculations used Reynolds-averaged Navier-Stokes equations with Newtonian blood properties. The results showed that the flow upstream and downstream of the defective valve is highly influenced by malfunction severity and this resulted in a misleading improvement in the correlation between simulated Doppler |
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Incompressible Viscous Flow With Moving Boundaries $113 Despite the improved design of biological and Mechanical Heart Valves (MHV), thrombus formation remains a challenge in clinical practice. Abnormal blood flow through the foreign valve components is recognized as the greatest limitation. An important aspect of MHV selection and design lies in the understanding of the fundamental principles that govern the complex dynamical interactions between blood and valve. Therefore, a novel approach has been adopted to predict the valve movement by utilizing the fluid-structure interaction model which is innovative and fundamentally distinct from the prevailing methods of simulation that assume valve movement a priori. Based on a fictitious domain method and an operator splitting scheme, a mathematical formulation has been outlined for a fluid-structure model. Numerical simulations are performed for non-moving and moving rigid bodies to visualize the flow field. Simulations have also extended to rigid rectangular flaps following a rotational movement about fixed points in an unsteady flow as an initial attempt to model a 2D MHV. The study should be helpful to educators and professionals in the field of industrial and biological applications. |
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Incompressible Viscous Flow with Moving Boundaries $114.67 Used – Despite the improved design of biological and Mechanical Heart Valves (MHV), thrombus formation remains a challenge in clinical practice. Abnormal blood flow through the foreign valve components is recognized as the greatest limitation. An important aspect of MHV selection and design lies in the understanding of the fundamental principles that govern the complex dynamical interactions between blood and valve. Therefore, a novel approach has been adopted to predict the valve movement by ut |
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Incompressible Viscous Flow with Moving Boundaries $114.67 New – Despite the improved design of biological and Mechanical Heart Valves (MHV), thrombus formation remains a challenge in clinical practice. Abnormal blood flow through the foreign valve components is recognized as the greatest limitation. An important aspect of MHV selection and design lies in the understanding of the fundamental principles that govern the complex dynamical interactions between blood and valve. Therefore, a novel approach has been adopted to predict the valve movement by uti |
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Incompressible Viscous Flow with Moving Boundaries $75.63 Used – Despite the improved design of biological and Mechanical Heart Valves (MHV), thrombus formation remains a challenge in clinical practice. Abnormal blood flow through the foreign valve components is recognized as the greatest limitation. An important aspect of MHV selection and design lies in the understanding of the fundamental principles that govern the complex dynamical interactions between blood and valve. Therefore, a novel approach has been adopted to predict the valve movement by ut |
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Incompressible Viscous Flow with Moving Boundaries $75.63 New – Despite the improved design of biological and Mechanical Heart Valves (MHV), thrombus formation remains a challenge in clinical practice. Abnormal blood flow through the foreign valve components is recognized as the greatest limitation. An important aspect of MHV selection and design lies in the understanding of the fundamental principles that govern the complex dynamical interactions between blood and valve. Therefore, a novel approach has been adopted to predict the valve movement by uti |
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Mechanics of Biological Tissue $179 The mechanics of biological tissues is a multidisciplinary and rapidly expanding area of research. This book highlights some important research directions that combine mechanical sciences with exciting new developments in biology.It includes state-of-the-art articles on:Tissue growth and remodelling – general continuum theories of growth, remodelling and adaptation, with specific applications to arterial, tendon and cartilage growth and to bone healing.Micromechanics, cells and matrix – measurements of the mechanical properties of cells, engineering of cell systems, constitutive and computational modelling of cells and cell-substrate interactions, and the transition from microscopic modelling to its macroscopic consequences.Arteries in health and disease – analysis of residual stress and its development, modelling the constitutive properties of arterial walls, computational analysis of the effect of stenting on the arterial wall, studies of collagen fibre distributions in saccular aneurysms and the interaction between blood flow and aneurysm development.Biological tissues – the musculo-skeletal system, heart valves, ligaments, intervertebral discs, the uterus and vocal fold tissues, with experimental, modelling and computational perspectives.Image-based analysis – illustration of imaging techniques that have great potential for the analysis of tissue properties and pathologies and for guiding the design of engineered tissue constructs.This collection of papers should be of interest to theoretical, computational and experimental researchers and doctoral students in the area of biomechanics and in related areas of engineering, biology and medicine. |
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Platelet Activation and Procoagulant Evaluation in an in Vitro System $72.39 Used – Thromboembolic events caused by implanted cardiovascular devices present serious challenges to surgeons and researchers alike. In particular bileaflet mechanical heart valves are prone to thrombus formation in the hinge region due to a combination of high shear stress and stagnation regions. It is desirable to study this phenomenon in a more physiological environment. This research presents models that isolate and mimic bileaflet mechanical heart valve (BMHV) hinge geometries to quantitat |
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Platelet Activation and Procoagulant Evaluation in an in Vitro System $112.69 Used – Thromboembolic events caused by implanted cardiovascular devices present serious challenges to surgeons and researchers alike. In particular bileaflet mechanical heart valves are prone to thrombus formation in the hinge region due to a combination of high shear stress and stagnation regions. It is desirable to study this phenomenon in a more physiological environment. This research presents models that isolate and mimic bileaflet mechanical heart valve (BMHV) hinge geometries to quantitat |
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Platelet Activation and Procoagulant Evaluation in an in Vitro System $112.69 New – Thromboembolic events caused by implanted cardiovascular devices present serious challenges to surgeons and researchers alike. In particular bileaflet mechanical heart valves are prone to thrombus formation in the hinge region due to a combination of high shear stress and stagnation regions. It is desirable to study this phenomenon in a more physiological environment. This research presents models that isolate and mimic bileaflet mechanical heart valve (BMHV) hinge geometries to quantitati |
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Platelet Activation and Procoagulant Evaluation in an in Vitro System $72.39 New – Thromboembolic events caused by implanted cardiovascular devices present serious challenges to surgeons and researchers alike. In particular bileaflet mechanical heart valves are prone to thrombus formation in the hinge region due to a combination of high shear stress and stagnation regions. It is desirable to study this phenomenon in a more physiological environment. This research presents models that isolate and mimic bileaflet mechanical heart valve (BMHV) hinge geometries to quantitati |
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Regenerating the Heart: Stem Cells and the Cardiovascular System $239 Medical research made huge strides in treating heart disease in the 20thcentury, from drug-eluding stents to automatic internal defibrillators. Public awareness of the dangers of heart disease has never been more pervasive. Now,though, ten years into a new millennium, scientists are gearing up for the next great challenges in tackling this pervasive condition. Cell therapy is going to be a key weapon in the fight against heart disease. It has the potential to address many cardiovascular conditions. From heart failure to atrioventricular nodal dysfunction, the young but promising field of cell therapy is set to play a significant role in developing the cures that the upcoming decades of hard work will yield.Regenerating the Heart: Stem Cells and the Cardiovascular System organizes the field into a digestible body of knowledge. Its four sections cover mechanical regeneration, electrical regeneration, cardiac tissues and in vivo stem cell therapies. An array of talented researchers share the fruits of their labors,with chapters covering such crucial issues as the cardiogenic potential of varying stem cell types, the ways in which they might be used to tackle arrhythmias, their possible application to biological replacements for cardiac tissues such as valves, and the varying approaches used in the in vivoevaluation of stem cell therapies, including methods of delivering stem cells to the myocardium.This comprehensive survey of an area of research with such exciting potential is an invaluable resource both for veteran stem cell researchers who need to monitor fresh developments, and for newly minted investigators seeking inspirational examples. |