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Perianal fistula

Perianal fistula

Perianal fistula is a newly formed passage between the anal canal, rarely rectum and tissues around the anus. The walls of fistula are formed by so granulation tissue fruit of long inflammation. Maintain a constant incoming faeces. Thus, once formed, the fistula maintained by simmering chronic inflammation, resulting in the secretion from the fistula opening, according to health care symptoms.

The main reason for the formation of fistula are small anal glands, which start from anal canal and ends blindly in depth between the muscles of the anal canal. When they become clogged with fecal matter, creating conditions for inflammation, infection penetrates deeply and creates its own moves that by opening the skin, forming fistula channel. Less common causes of the formation of fistulas.

Important from a practical point of view is the location of the fistula channel to the muscles of the anus. This arrangement determines the surgical approach to the treatment. It is best to imagine the rectum (anal canal) as two muscular tubes placed one inside the other covered inside with mucosa. Outside, they are surrounded by fatty tissue. Fistula channel begins inside a hole in the lining and moves through the different layers of the anal wall outside and pierce the skin. There are three options:
Fistula channel moves into the lining tangential anal muscles without her breakthrough. This occurs about anal open tearing the skin. Main point is that fistula move not pierce pipes ie muscle During con fistula moves along the inner side.
Fistula channel moves from the mucous membrane by penetrating the muscle wall of the anal canal (tube) in the space between the two pipes, and thus without passing through the thickness of the muscular layer opens on the skin around the anus. In this case, the stroke of fustula moves between two muscle tubes and thus appears on the skin surface.
Fistula channel moves from the mucous membrane by penetrating the muscle wall, passes through the thickness of the wall, passes through the tissues around the anus and otrarya skin around the anus. Thus, it crosses the entire thickness of the muscular wall of the anus.
Important for each fistula is to determine exactly which type is, because this determines the surgical approach to it.

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