dose area product was 0.82 mGym2 (IQR 0.4-1.5)
with an average fluoroscopy time of 2 minutes and 45 seconds.
Entrance surface dose was 30.7 mGy (IQR 15-60.8) and effective
dose was 0.44 mSv (IQR 0.2-0.9). Multivariate analysis identified
that difficult papillary cannulation (β0.4; p = 0.009), patient age
(β-0.01; p = 0.001) and therapeutic applied (β= 0.89; p < 0.001)
influenced dose-area product. The ERCP dose would be equivalent
to the radiation received by twenty chest radiographs and
would be about fourteen times smaller than a barium enema or
twenty times less than that received during an abdominal CT. Lifetime
attributable risk of cancer incidence was 4.08 and 16.81 per
million procedures in diagnostic and therapeutic ERCP respectively