Anorectal and Colonic Diseases: A Practical Guide to Their - download pdf or read online

By Felix Aigner, Helga Fritsch (auth.), Jean-Claude R. Givel, Neil Mortensen, Bruno Roche (eds.)

ISBN-10: 3540694188

ISBN-13: 9783540694182

This absolutely revised and enlarged new version bargains concise and well-structured chapters each one focussing at the scientific, diagnostic, and healing points of a situation in general encountered by way of the coloproctologist and gastroenterological medical professional, who're confronted with more and more specified and particular therapy modalities. the great, but easy-to-read, details during this useful advisor on either universal and infrequent anorectal and colonic ailments is especially very important for either the practitioner, who must understand all of the attainable modalities of conservative and surgical operation, and the general practitioner, who must adapt his surgery to the scientific and anatomical findings. certain directions are given and surgical recommendations illustrated. every one bankruptcy is finished with updated references and a self-assessment quiz.

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3 Generation and Control of Colorectal Motility Smooth muscle cells within the circular and longitudinal colorectal muscle layers are arranged in bundles that are connected by gap junctions. Bundles fuse at many points and thereby function as a syncytium. The resting membrane potential of the smooth muscle cells undergoes small undulating changes called slow waves. These are generated by the pacemaker cells (interstitial cells of Cajal) [9]. The slow waves do not cause contractions, but they do influence the frequency of spike potentials.

23 Electrophysiology . . . . . . . . . . . 23 Transanal Ultrasonography and MRI . . . 23 Rectal Capacity, Distensibility and Compliance . . . . . . . . . . . . 24 Anal Sensation . . . . . . . . . . . . 24 Colorectal Transit Time . . . . . . . . . 24 Colorectal Emptying . . . . . . . . . . 25 Defecography . . . . . . . . . . . . . 25 Anal Continence and Normal Bowel Movements . . . . . . 27 Practical Guidelines for Use of Tests of Incontinence and Constipation .

1 Colonic Motility Contractions are either phasic or tonic [16]. Phasic colonic contractions last a few seconds and cause elevated intraluminal pressure [16, 26]. They are single, nonpropagating contractions or mass contractions. Single, nonpropagating contractions occur very frequently and include shorter or longer segments of the colon [8, 31]. The main function of these contractions is to mix the colonic luminal content, thereby promoting absorption, or to move the colonic content over a small distance [8].

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Anorectal and Colonic Diseases: A Practical Guide to Their Management by Felix Aigner, Helga Fritsch (auth.), Jean-Claude R. Givel, Neil Mortensen, Bruno Roche (eds.)


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