Techniques in Coloproctology

, Volume 19, Issue 7, pp 437–438 | Cite as

Defecographic functional evaluation of rectal akinesia

  • C. Morandi
  • J. MartellucciEmail author
  • M. Genovese
  • P. Torricelli
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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...


Anal Sphincter Rectal Prolapse Sacral Nerve Stimulation Enterocele Propulsive Force 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Conflict of interest


Supplementary material

Supplementary material 1 (MPG 10706 kb)

Supplementary material 2 (MPG 19402 kb)

Supplementary material 3 (MPG 14557 kb)


  1. 1.
    Bush M, Petros P, Swash M, Fernandez M, Gunnemann A (2012) Defecation 2: internal anorectal resistance is a critical factor in defecatory disorders. Tech Coloproctol 16:445–450PubMedCrossRefGoogle Scholar
  2. 2.
    Rao SS (2008) Dyssynergic defecation and biofeedback therapy. Gastroenterol Clin N Am 37:569–586CrossRefGoogle Scholar
  3. 3.
    Faucheron JL, Dubreuil A (2000) Rectal akinesia as a new cause of impaired defecation. Dis Colon Rectum 43:1545–1549PubMedCrossRefGoogle Scholar
  4. 4.
    Schouten WR, Gosselink MJ, Boerma MO, Ginai AZ (1998) Rectal wall contractility in response to an evoked urge to defecate in patients with obstructed defecation. Dis Colon Rectum 41:473–479PubMedCrossRefGoogle Scholar
  5. 5.
    Halligan S, Thomas J, Bartram C (1995) Intrarectal pressures and balloon expulsion related to evacuation proctography. Gut 37:100–104PubMedCentralPubMedCrossRefGoogle Scholar
  6. 6.
    Cadeddu F, Sileri P, Grande M, De Luca E, Franceschilli L, Milito G (2012) Focus on abdominal rectopexy for full-thickness rectal prolapse: meta-analysis of literature. Tech Coloproctol 16:37–53PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Italia Srl 2015

Authors and Affiliations

  • C. Morandi
    • 1
  • J. Martellucci
    • 2
    Email author
  • M. Genovese
    • 1
  • P. Torricelli
    • 1
  1. 1.Department of RadiologyModena University HospitalModenaItaly
  2. 2.Department of General, Emergency and Minimally Invasive SurgeryCareggi University HospitalFlorenceItaly

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