[Radiologic diagnosis of anal fistulae with radio-opaque markers].
Fistulography classifies anal fistulas in low-below puborectalis muscle-, high-above puborectalis muscle-, and middle. This classification increases the scope and accuracy of radical surgery. In order to improve the diagnostic reliability of anal fistulography the authors point out the importance of radio-opaque markers for anatomical definition of the anorectal region. Thirty patients (25 males and 5 females; mean age: 47 years) were studied by anal fistulography using radiopaque markers: a Foley's 22 Fr catheter, with distal balloon filled of idrosoluble radiopaque contrast medium, was placed in the anal canal; a metal marker was fixed to the anus. In order to demonstrate the relationship between fistula and puborectalis muscle, we subdivided the anal canal in 3 equal segments: high, middle and low. The idrosoluble contrast medium for fistulography is injected through a pediatric Foley's catheter 8 Fr when external opening is large enough, and through a K7072 endovenous catheter when the opening is small. Fistulous tract was visible in all patients: internal fistulous opening in 23/90 cases, and relationship of fistulous tract to puborectalis muscle in 25/30 (83.3%). In demonstrating either secondary fistulous tracts or abscesses, fistulography with radiopaque markers was correct in 60% of cases; in 20% of patients some of the above-mentioned complications were demonstrated, and in the 20% no complications at all were detected.
Pomerri
F
F
Istituto di Radiologia, Università, Padova.
Pittarello
F
F
Dodi
G
G
Pianon
P
P
Muzzio
P C
PC
D000328:Adult; D000368:Aged; D001004:Anus Diseases / Q000000981:diagnostic imaging*; D002404:Catheterization / Q000379:methods; D003287:Contrast Media; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012003:Rectal Fistula / Q000000981:diagnostic imaging*
D003287:Contrast Media
Diagnosi radiologica delle fistole anali con reperi radiopachi.