Gastrointestinal Pathophysiology

The Microbiota in Gastrointestinal Pathophysiology: Implications for Human Health, Prebiotics, Probiotics and Dysbiosis is a one-stop reference on the state-of-the-art research on gut microbial ecology in relation to human disease. This important resource starts with an overview of the normal microbiota of the gastrointestinal tract, including the esophagus, stomach, Ileum, and colon. The book then identifies what a healthy vs. unhealthy microbial community looks like, including methods of identification. Also included is insight into which features and contributions the microbiota make that are essential and useful to host physiology, as is information on how to promote appropriate mutualisms and prevent undesirable dysbioses. Through the power of synthesizing what is known by experienced researchers in the field, current gaps are closed, raising understanding of the role of the microbiome and allowing for further research. Explains how to modify the gut microbiota and how the current strategies used to do this produce their effects Explores the gut microbiota as a therapeutic target Provides the synthesis of existing data from both mainstream and non-mainstream sources through experienced researchers in the field Serves as a ‘one-stop’ shop for a topic that’s currently spread across a number of various journals

This new edition of Pediatric Gastrointestinal Disease is dedicated to the maintenance of a comprehensive approach to the practice of Pediatric Gastroenterology. Considered to be the definitive reference work, this fourth edition has been extensively reviewed. As a result, the size and content of various sections have been modified and new ......

The latest edition of this important text defines the spectrum of changes that can affect the GI tract. Site-by-site coverage of anatomy, infectious diseases, clinical manifestations, radiology, and pathologic analysis is supported by gross and microscopic photographs, line drawings, radiographs, and electron micrographs. Features discussions on IBD, polyposis syndromes, malignant lymphomas and hematologic malignancies, mesenchymal neoplasms, and cytology of the GI tract...NEW chapters on AIDS-related diseases and motility disorders...MORE on pediatric pathology and mucosal biopsy interpretation...and much more.

This collaboration of two physiologists and a gastroenterologist provides medical and graduate students, medical and surgical residents, and subspecialty fellows a comprehensive summary of digestive system physiology and addresses the pathophysiological processes that underlie some GI diseases. The textual approach proceeds by organ instead of the traditional organization followed by other GI textbooks. This approach lets the reader track the food bolus as it courses through the GI tract, learning on the way each organ's physiologic functions as the bolus directly or indirectly contacts it. The book is divided into three parts: 1) Chapters 1-3 include coverage of basic concepts that pertain to all (or most) organs of the digestive system, salivation, chewing, swallowing, and esophageal function, 2) Chapters 4-6 are focused on the major secretory organs (stomach, pancreas, liver) that assist in the assimilation of a meal, and 3) Chapters 7 and 8 address the motor, transport, and digestive functions of the small and large intestines. Each chapter includes its own pathophysiology and clinical correlation section that underscores the importance of the organ's normal function.

Gastrointestinal Surgery: Pathophysiology and Management is an invaluable reference text for surgeons and surgical trainees. Written entirely by Dr. Haile T. Debas, Dean of School of Medicine and former Professor and Chairman, Department of Surgery, at the University of California, San Francisco, this book provides the unified approach only found in a single-authored text. Based on the three pillars of understanding particular disease processes -- fundamental anatomy and physiology, pathopysiology, and clinical correlations -- surgical treatment of GI disease is presented as the means to correct abnormal physiology and restore health. Using an integrated approach of basic science and clinical practice, Dr. Debas allows the student of surgery to gain a solid understanding of disease processes that minimizes the need for rote memorization. Thirteen lavishly illustrated chapters cover the GI system as well as gastrointestinal peptides and peptide-secreting tumors, abdominal trauma, the abdominal wall, surgery for morbid obesity, the liver, spleen, retroperitoneum, and perioperative care. Dozens of summary tables throughout each chapter condense "essentials" for quick reference. Comprehensive discussions of clinical disorders review the surgical treatment options. With 400 illustrations and tables, including hundreds of anatomical line drawings commissioned exclusively for this textbook, Gastrointestinal Surgery provides a clinical and therapeutic approach to surgical diseases which will prove invaluable to the surgical trainee and the practitioner preparing for recertification.

The microcirculation of the gastrointestinal tract is under the control of both myogenic and metabolic regulatory systems. The myogenic mechanism contributes to basal vascular tone and the regulation of transmural pressure, while the metabolic mechanism is responsible for maintaining an appropriate balance between O2 demand and O2 delivery. In the postprandial state, hydrolytic products of food digestion elicit a hyperemia, which serves to meet the increased O2 demand of nutrient assimilation. Metabolically linked factors (e.g., tissue pO2, adenosine) are primarily responsible for this functional hyperemia. The fenestrated capillaries of the gastrointestinal mucosa are relatively permeable to small hydrolytic products of food digestion (e.g., glucose), yet restrict the transcapillary movement of larger molecules (e.g., albumin). This allows for the absorption of hydrolytic products of food digestion without compromising the oncotic pressure gradient governing transcapillary fluid movement and edema formation. The gastrointestinal microcirculation is also an important component of the mucosal defense system whose function is to prevent (and rapidly repair) inadvertent epithelial injury by potentially noxious constituents of chyme. Two pathological conditions in which the gastrointestinal circulation plays an important role are ischemia/reperfusion and chronic portal hypertension. Ischemia/reperfusion results in mucosal edema and disruption of the epithelium due, in part, to an inflammatory response (e.g., increase in capillary permeability to macromolecules and neutrophil infiltration). Chronic portal hypertension results in an increase in gastrointestinal blood flow due to an imbalance in vasodilator and vasoconstrictor influences on the microcirculation. Table of Contents: Introduction / Anatomy / Regulation of Vascular Tone and Oxygenation / Extrinsic Vasoregulation: Neural and Humoral / Postprandial Hyperemia / Transcapillary Solute Exchange / Transcapillary Fluid Exchange / Interaction of Capillary and Interstitial Forces / Gastrointestinal Circulation and Mucosal Defense / Gastrointestinal Circulation and Mucosal Pathology I: Ischemia/Reperfusion / Gastrointestinal Circulation and Mucosal Pathology II: Chronic Portal Hypertension / Summary and Conclusions / References / Author Biography