First, inspection of the fistula, which has healed without irritation and is equipped with a thread drainage. Probing of the fistula through the external fistula opening, as well as the digital rectal examination. Finally, insertion of the Parks retractor.
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Probing and Inspection of the Fistula
![Probing and Inspection of the Fistula]()
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Excision of the External Fistula Opening
To create a wide external drainage wound, the external fistula opening is first generously incised,
To create a wide external drainage wound, the external fistula opening is first generously incised,
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