Defecographic functional evaluation of rectal akinesia
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Defecation is a complex and still incompletely understood phenomenon related to several integrated mechanisms. However, improvements over the past few years in our understanding of the process of defecation, along with the increasing use of radiological and anorectal physiology studies, have led to improved treatment results. Segmental and propagated contractions deliver colonic content into the rectum, where sensory mechanisms relay the sense of rectal filling sensation, stimulating rectal emptying. As stool passes through the colon, it is stored in the sigmoid colon until a mass movement empties it into the rectum. Rectosigmoid contractions develop an expulsive force vector directed toward the rectum and the anal canal. A vector is a mathematical representation of a magnitude of force and the direction in which the force is applied. The movement of stool through the colon and rectum can be analyzed by examining the pressure vectors that act upon the stool. When the concept of vector...
KeywordsAnal Sphincter Rectal Prolapse Sacral Nerve Stimulation Enterocele Propulsive Force
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