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A computerised vector manometry study of the so-called ectopic anus.

T Schuster1, I Joppich, K Schneider

  • 1Department of Pediatric Surgery, Dr. v. Haunerschen Kinderspital, Klinikum Innenstadt der Ludwig Maximilians Universität München, Lindwurmstrasse 4, 80337 München, Germany.

Pediatric Surgery International
|February 9, 2000
PubMed
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Computerized manometry helps define ectopic anus by revealing significantly decreased ventral pressure in the lower anal canal. This finding correlates with anterior displacement and improves after surgery.

Area of Science:

  • Pediatric Surgery
  • Gastroenterology
  • Anorectal Physiology

Background:

  • Ectopic anus has varied definitions, complicating diagnosis and treatment.
  • Understanding anorectal function is crucial for surgical outcomes in pediatric patients.

Purpose of the Study:

  • To evaluate the utility of computerized eight-channel manometry in defining ectopic anus.
  • To correlate manometric findings with surgical outcomes in patients with ectopic anus.

Main Methods:

  • Ten patients with ectopic anus underwent surgery (perineal pull-through) and pre/postoperative manometry.
  • Quantitative analysis of manometric data, including segmental pressure and asymmetry index in the lower anal canal (LAC).
  • Qualitative imaging analysis and barium roentgenograms were also performed.

Related Experiment Videos

Main Results:

  • Patients with ectopic anus had significantly longer resting anal canal length (P < 0.0001).
  • Significantly decreased ventral pressure in the LAC (less than half the mean segmental pressure) was observed (P < 0.0001).
  • A correlation existed between anterior displacement and decreased ventral pressure, which improved postoperatively.

Conclusions:

  • Computerized manometry defines ectopic anus by a deficient ventral high-pressure zone in the LAC.
  • Ectopic anus is characterized by the LAC lacking ventral sphincteric tissue, ending ectopically on the perineal surface.
  • Manometry provides functional insights aiding in the definition and management of ectopic anus.