Gastrointestinal Motility New Directions
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Gastrointestinal Motility New Directions
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Author : Ronnie Fass
language : en
Publisher: S. Karger AG (Switzerland)
Release Date : 2006
Gastrointestinal Motility New Directions written by Ronnie Fass and has been published by S. Karger AG (Switzerland) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Gastrointestinal system categories.
The last decade has seen two important opposing trends in the field of GI motility: An increase in new evaluative techniques and a marked decrease in GI trainees' interest in pursuing a career in GI motility. The latter trend, if it continues, will eventually have a negative impact on the former, further compounded by the limited introduction of new motility-related therapeutic modalities. To reconcile these two antagonistic trends, immediate attention by concerned GI societies and organizations is called for. This publication therefore starts with the perspective of the presidents of the World Congress of Gastroenterology and of the American Motility Society on the academic, research and training opportunities in GI motility. Subsequently, information about new clinical and research developments in GI motility and functional bowel disorders is provided: Experts in the field address areas that show promising new developments likely to lead to a better understanding and management of GI motility disorders. This publication will hopefully draw attention to the renaissance that the GI motility field has enjoyed in recent years. At the same time, it is emphasized that the field has reached a critical point in attracting the needed critical mass that will ensure its future.
New Advances In Gastrointestinal Motility Research
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Author : L. K. Cheng
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-01
New Advances In Gastrointestinal Motility Research written by L. K. Cheng and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-01 with Medical categories.
Research into gastrointestinal motility has received renewed interest in part due to recent advances in the techniques for measuring the structure and function of gastrointestinal cells, tissue and organs. The integration of this wealth of data into biophysically based computation models can aid in interpretation of experimental and clinical measurements and the refinement of measurement techniques. The contents of this book span multiple scales - from cell, tissue, organ, to whole body and is divided into four broad sections covering: i) gastrointestinal cellular activity and tissue structure; (ii) techniques for measuring, analyzing and visualizing high-resolution extra-cellular recordings; (iii) methods for sensing gastroelectrical activity using non-invasive bio-electro-magnetic fields and for modulating the underlying gastric electrical activity and finally (iv) methods for assessing manometric and videographic motility patterns and the application of these data for predicting the flow and mixing behavior of luminal contents by using computational fluid dynamic techniques. This book aims to provide both an overview of historical and existing research techniques as well as to highlight future directions and challenges for the community as a whole. It will be suitable for clinicians to understand the cellular and biophysical underpinnings of gastric emptying, gastroenterologists, surgeons, bioengineers and all scientists with interests in gastrointestinal motility research.
Gastroparesis
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Author : Richard Mccallum
language : en
Publisher: Academic Press
Release Date : 2020-09-30
Gastroparesis written by Richard Mccallum and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-09-30 with Science categories.
Gastroparesis: Pathophysiology, Clinical Presentation, Diagnosis and Treatment is a reference book providing a centralized source of data on gastroparesis collected over the last decade. Contents include the pathophysiology, clinical presentation, diagnostic recommendations and treatment options for gastroparesis. The reference is split into broad subsections, with the strategy of first focusing on the key features of the disease and then turning to controversies, recent developments, patient support resources, the spectrum of treatment – including medical and surgical - and future directions. Chapters will include coverage of important topics like autonomic neuropathy, the brain-gut axis, potential pathophysiological advances at the cellular level, diagnostic and therapeutic options specifically targeted at the pylorus, and the evaluation of the female predominance in gastroparesis. This is a must-have resource for scientists looking to find the next step in their research as well as healthcare professionals ranging from Gastroenterologists to Internists, Surgeons, Nutritionists, Psychiatrists, and Psychologists, Residents and Medical Students who struggle with how to optimally take care of their gastroparetic patients. Provides a comprehensive overview of what is known regarding the pathophysiology, clinical presentation, diagnostic considerations and treatment options for gastroparesis Includes key updates made in the last decade, including the progress made by the NIH Gastroparesis Consortium Presents both sides of key controversies in the field, including the debate between classification of gastroparesis versus functional dyspepsia Fully reviews the major advances in pharmacologic agents for therapy, both anti-emetics and prokinetics Extensive update on the "Pyloric Revolution" and our understanding of the pathophysiology of gastroparesis and how the focus on the pylorus has literally transformed our treatment strategy with an emphasis on both surgical and endoscopic advances in addressing pyloric dysfunction
Gastrointestinal Motility And Neurogastroenterology
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Author : Richard W. McCallum
language : en
Publisher: Clinics: Internal Medicine
Release Date : 2009
Gastrointestinal Motility And Neurogastroenterology written by Richard W. McCallum and has been published by Clinics: Internal Medicine this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Medical categories.
This issue aims to bring the busy gastroenterologist/endoscopist up to date with advances and future directions in gastrointestinal motility and functional bowel disorders. Articles include coverage of the esophagus and small bowel and attention is given to Smartpill technology. Gastric emptying and constipation are also covered in detail, with attention to role of surgery and particularly sacral nerve stimulation for fecal incontinence. The Guest Editor believes that the state-of-the-art information in this issue will allow clinicians to be on the cutting edge for the foreseeable future.
Colonic Motility
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Author : Sushil K. Sarna
language : en
Publisher: Biota Publishing
Release Date : 2010-11-01
Colonic Motility written by Sushil K. Sarna and has been published by Biota Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-11-01 with Medical categories.
Three distinct types of contractions perform colonic motility functions. Rhythmic phasic contractions (RPCs) cause slow net distal propulsion with extensive mixing/turning over. Infrequently occurring giant migrating contractions (GMCs) produce mass movements. Tonic contractions aid RPCs in their motor function. The spatiotemporal patterns of these contractions differ markedly. The amplitude and distance of propagation of a GMC are several-fold larger than those of an RPC. The enteric neurons and smooth muscle cells are the core regulators of all three types of contractions. The regulation of contractions by these mechanisms is modifiable by extrinsic factors: CNS, autonomic neurons, hormones, inflammatory mediators, and stress mediators. Only the GMCs produce descending inhibition, which accommodates the large bolus being propelled without increasing muscle tone. The strong compression of the colon wall generates afferent signals that are below nociceptive threshold in healthy subjects. However, these signals become nociceptive; if the amplitudes of GMCs increase, afferent nerves become hypersensitive, or descending inhibition is impaired. The GMCs also provide the force for rapid propulsion of feces and descending inhibition to relax the internal anal sphincter during defecation. The dysregulation of GMCs is a major factor in colonic motility disorders: irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and diverticular disease (DD). Frequent mass movements by GMCs cause diarrhea in diarrhea predominant IBS, IBD, and DD, while a decrease in the frequency of GMCs causes constipation. The GMCs generate the afferent signals for intermittent short-lived episodes of abdominal cramping in these disorders. Epigenetic dysregulation due to adverse events in early life is one of the major factors in generating the symptoms of IBS in adulthood.
Gastrointestinal Motility
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Author : Satish S.C. Rao
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Gastrointestinal Motility written by Satish S.C. Rao and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.
Gastrointestinal motility has evolved from an esoteric laboratory tool into a sophisti cated diagnostic technique that is now widely used clinically to guide in management of complex gastrointestinal problems. Today, it is the most rapidly growing subspecialty within gastroenterology. Previously, many of the gastrointestinal motility problems were either ignored or attributed to a disturbance of "psyche." But with the growing knowledge and understanding of how a dysfunction of the gastrointestinal muscle and nerves can cause disease, we are at the threshold of a revolution in our approach to the diagnosis and treatment of gastrointestinal motility disorders. The purpose of this book is to serve as a useful, up-to-date reference manual and guide for the diagnostic and therapeutic approach towards common adult and pediatric gastrointestinal motility problems. In order to enhance the understanding of these disor ders, a problem-oriented approach has been chosen, and wherever possible the authors have provided clinical case scenarios to illustrate their message. The emphasis has been on how to diagnose and treat motility disorders rather than to provide an encyclopedic infor mation. The reference list at the end of each chapter should enable the enthusiast to seek further information. Some of the material presented in this book has been derived from the proceedings of the annual University ofIowa College of Medicine GI Motility Symposia.
Gastroparesis
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Author : Henry P. Parkman
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-10-05
Gastroparesis written by Henry P. Parkman and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-10-05 with Medical categories.
Gastroparesis is an increasingly recognized disorder. Treatment can be difficult due to the several mechanisms for symptom production. Gastroparesis: Pathophysiology, Presentation and Treatment serves as a concise reference on this disorder that allows clinicians to quickly access and evaluate the necessary information for treating and managing patients with gastroparesis. Each chapter is written by experts in their respective area. The volume will enable the reader to better understand all aspects of this disorder. The book presents current concepts in a variety of areas opening with the epidemiology, clinical presentation and pathophysiology of gastroparesis. The natural history of patients is explored as well as evaluation of patients with suspected gastroparesis. This section includes chapters on Wireless Capsule Motility, Electrogastrography and Antroduodenal Manometry. This important resource concludes with a full section on treatment including dietary, prokinetic, antiemetic, sensory, electric stimulation, and surgical methods. New developments include the use of gastric electric stimulation for treatment, the use of SmartPill for diagnosis, and a number of new agents in development for this disorder. Gastroparesis: Pathophysiology, Presentation and Treatment is the ideal reference for gastroenterologists, and also for surgeons, endocrinologists, primary care physicians and nutritionists looking to keep pace with the latest information treatment options for their patients.
Schuster Atlas Of Gastrointestinal Motility In Health And Disease
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Author : Marvin Meier Schuster
language : en
Publisher: PMPH-USA
Release Date : 2002
Schuster Atlas Of Gastrointestinal Motility In Health And Disease written by Marvin Meier Schuster and has been published by PMPH-USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Gastrointestinal system categories.
The accompanying disc contains the complete text and illustrations of the book in fully searchable PDF files.
New Directions In Wireless Communications Systems
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Author : Athanasios G. Kanatas
language : en
Publisher: CRC Press
Release Date : 2017-10-16
New Directions In Wireless Communications Systems written by Athanasios G. Kanatas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-16 with Computers categories.
Beyond 2020, wireless communication systems will have to support more than 1,000 times the traffic volume of today's systems. This extremely high traffic load is a major issue faced by 5G designers and researchers. This challenge will be met by a combination of parallel techniques that will use more spectrum more flexibly, realize higher spectral efficiency, and densify cells. Novel techniques and paradigms must be developed to meet these goals. The book addresses diverse key-point issues of next-generation wireless communications systems and identifies promising solutions. The book's core is concentrated to techniques and methods belonging to what is generally called radio access network.
Motor Function Of The Pharynx Esophagus And Its Sphincters
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Author : Ravinder Mittal
language : en
Publisher: Morgan & Claypool Publishers
Release Date : 2011
Motor Function Of The Pharynx Esophagus And Its Sphincters written by Ravinder Mittal and has been published by Morgan & Claypool Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Medical categories.
Deglutition or a swallow begins as a voluntary act in the oral cavity but proceeds autonomously in the pharynx and esophagus. Bilateral sequenced activation and inhibition of more than 25 pairs of muscles of mouth, pharynx, larynx, and esophagus is required during a swallow. A single swallow elicits peristalsis in the pharynx and esophagus along with relaxation of upper and lower esophageal sphincters. Multiple swallows, at closely spaced time intervals, demonstrate deglutitive inhibition; sphincters remain relaxed during the entire period, but only the last swallow elicits peristalsis. Laryngeal inlet closure or airway protection is very important during swallow. Upper part of the esophagus that includes upper esophageal sphincter is composed of skeletal muscles, middle esophagus is composed of a mixture of skeletal and smooth muscles, and lower esophagus, including lower esophageal sphincter, is composed of smooth muscles. Peristalsis progresses in seamless fashion, despite separate control mechanism, from the skeletal to smooth muscle esophagus. The esophagus's circular and longitudinal muscle layers contract synchronously during peristalsis. Sphincters maintain continuous tone; neuromuscular mechanisms for tonic closure in the upper and lower esophageal sphincters are different. Lower esophageal sphincter transient relaxation, belching mechanism, regurgitation, vomiting, and reflux are mediated via the brain stem. Table of Contents: Introduction / Central Program Generator and Brain Stem / Pharynx-Anatomy, Neural Innervation, and Motor Pattern / Upper Esophageal Sphincter / Neuromuscular Anatomy of Esophagus and Lower Esophageal Sphincter / Extrinsic Innervation: Parasympathetic and Sympathetic / Interstitial Cells of Cajal / Recording Techniques / Motor Patterns of the Esophagus-Aboral and Oral Transport / Deglutitive Inhibition and Muscle Refractoriness / Peristalsis in the Circular and Longitudinal Muscles of the Esophagus / Neural and Myogenic Mechanism of Peristalsis / Central Mechanism of Peristalsis-Cortical and Brain Stem Control / Peripheral Mechanisms of Peristalsis / Central Versus Peripheral Mechanism of Deglutitive Inhibition / Neural Control of Longitudinal Muscle Contraction / Modulation of Primary and Secondary Peristalsis / Neural Control of Lower Esophageal Sphincter and Crural Diaphragm / Lower Esophageal Sphincter / Swallow-Induced LES Relaxation / Crural Diaphragm Contribution to EGJ and Neural Control / Transient LES Relaxation and Pharmacological Inhibition / Compliance of the EGJ / References