Zusammenfassung
Grundlagen: Die normale Anatomie und Physiologie des anorektalen Kontinenzorgans sind die Voraussetzung für den ungestörten Mechanismus von Defäkation bzw. fäkaler Kontinenz.
Methodik: Anhand anatomischer und physiologischer Untersuchungen werden die Grundlagen der Phinktererhaltung dargestellt.
Ergebnisse: Operationen am Sphinkterapparat können Inkontinenzsymptome nach sich ziehen, ebenso wie die teilweise oder vollständige Resektion des rektalen Reservoirs, die zusätzlich zu beträchtlichen Änderungen der Stuhlgewohnheiten führen kann. Die vordere Resektion mit koloanaler Anastomose als Modell eines extremen sphinktererhaltenden Verfahrens resultiert in einer Funktionseinschränkung des M. sphincter ani internus und einer erhöhten Stuhlfrequenz aufgrund des Reservoirverlusts. Die initialen Probleme von Defäkation und Kontinenz gehen in den ersten 12 Monaten nach Kolostomieverschluß zurück.
Schlußfolgerungen: Aufgrund des Risikos der postoperativen Inkontinenz ist bei Patienten mit tiefsitzendem Rektumkarzinom die Indikation zur extremen sphinktererhaltenden Operation nur bei präoperativ normaler Sphinkterfunktion zu stellen. Wesentliche Parameter werden durch präzise Kontinenzanamnese und Sphinktermanometrie erbracht.
Summary
Background: The normal anatomy and physiology of the anorectal organ of continence is the prerequisite for an undisturbed mechanism of defecation and fecal continence respectively.
Methods: By using anatomical and physiological data the basis of sphincterpreservation is described.
Results: Operations involving the sphincter apparatus may be followed by symptoms of incontinence, just as partial or total resection of the rectal reservoir, that in addition may lead to substantial changes of the bowel habits. Anterior resection with coloanal anastomosis as a model of an extreme sphinctersaving procedure results in a reduced function of the internal anal sphincter and in an increased frequency of evacuations due to the loss of reservoir. The initial problems of defecation and continence tend to improve during the first 12 months after closure of colostomy.
Conclusions: In view of the risk of postoperative incontinence in patients with low rectal cancer the indication for extreme sphinctersaving surgery depends on normal preoperative sphincterfunction. Relevant parameters are assessed by a precise history of continence and sphinctermanometry.
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Wunderlich, M. Anatomische Physiologie des Sphinkterorgans — funktionelle Grundlage beim sphinktererhaltenden Therapiekonzept des Rektumkarzinoms. Acta Chir Austriaca 26, 130–136 (1994). https://doi.org/10.1007/BF02620012
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DOI: https://doi.org/10.1007/BF02620012