In one of the early studies on MR fistulography
, Lunniss et al reported a concordance rate of 86%-88% between MRI and surgical findings.
Image studies such as fistulography
, ultrasonography, computed tomography (CT), or magnetic nuclear resonance imaging may provide anatomic details and help to achieve an appropriate diagnosis.
with the injection of the contrast material through the skin opening shows the connection to the uterus.
MRI has been found to be the investigation of choice and has been shown to be superior to digital explora-tion fistulography
EAUS and CT scan in assessing perianal fistulas56.
Dr Oliver Ayres, Intervention Radiologist Fellow at Royal Adelaide Hospital, described the principles of fistulography
and fistuloplasty in assessing and managing the surgically-created connection between an artery and vein, enabling haemodialysis in patients with chronic renal failure.
Any measurements that fall outside these parameters require further investigation, such as ultrasound or contrast fistulography
to detect problems.
Especially in case of difficulty in differentiating fistulas, magnetic resonance imaging (MRI) fistulography
, colonoscopy, or probing the fistula tract can be preferred.
Commonly done investigations in fistula-in-ano are sigmoidoscopy, colonoscopy, fistulography
, endoanal/endorectal ultrasound, Magnetic Resonance Imaging (MRI), Computerised Tomography Scan (CT scan) and a barium enema/small bowel series and fistuloscopy.
The draining neck puncta persisted, and the patient underwent fistulography
She also talked about MRI in VVF, MR Fistulography
and said that cystography is much better if done properly.
Diagnosis was made through history, physical examination and fistulography