The Sonographic Appearance of theAnal Canal by Endoanal Sonography with a 7 mmProbe
Coloproctology(2004)
摘要
Background: Imaging of the anorectal region has drastically changed over the past decade by the introduction of anal endosonography. This method has been used to localize injuries to the anal sphincters, fistula tracts and abscesses as well as to assess local invasion of cancerous lesions. It allows a quick and easy visualisation of the anorectal mucosa and the surrounding muscular structures. Limitations of endosonography include strictures and acute painful conditions. These caveats are largely caused by the size of regular rectal probes with an average diameter of 17 to 20 mm. Patients and Method: We compared a new rectal probe with an external diameter of only 7 mm to a regular probe with 20 mm. From April 1999 to March 2000 80 patients with acute and chronic anal pain were examined. Results: Even patients with acute anal pain could be examined without anaesthesia or sedation. The minimal compression and the absence of stretching artefacts of the 7 mm probe enabled us to depict the anal canal in an almost physiologic state. Marginal fistulas and haemorrhoidal knots in their anatomical localisation in the anal canal were easily identified. Conclusion: The introduction of endoanal ultrasound probes with a diameter below 1 cm represent a major improvement particularly for imaging all layers off the anal canal even under acute pain.
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关键词
conclusion: the introduction of endoanal ultrasound probes with a diameter below 1 cm represent a major improvement particularly for imaging all layers off the anal canal even under acute pain. key words: endoanal sonography . acute pain . small probe
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