2. Classiflcation of Fistulas

概要

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Fistulas were classified into 4 main groups according to their spread to perianal or perirectal spaces, i.e., I-subcutaneous or submucous fistula, II-intersphincteric (between internal and external sphincters) fistula, III-infralevator fistula and IV-supralevator fistula.<BR>I and II groups were further divided into H (high) and L (low), setting the dentate line as a dividing line. III and IV groups were divided into U (unilateral) and B (bilateral). Each of them was also divided into s (simple) and c (complicated).<BR>Eight hundred and eight cases of fistulas operated in our clinic for the past 3 years were classified according to the above-mentioned criteria and shown in the following table (denominator in each column). Also shown in the same table are re-operation cases in each types-of fistulas (numerator) and re-operation rates (%).
日本大腸肛門病学会の論文