Factor | n | Air (+) | % |
ERCP + sphincterotomy | 49 | 7 | 14.3 |
Procedure duration < 30 min | 36 | 4 | 11.1 |
CBD stones removal | 26 | 3 | 11.5 |
Use of biliary baskets | 22 | 3 | 13.6 |
Juxtapapillary diverticulum | 20 | 1 | 5.0 |
Procedure duration > 30 min | 14 | 3 | 21.4 |
Large stones removal | 12 | 2 | 16.7 |
Precut | 10 | 1 | 10.0 |
Use of balloon | 4 | 0 | 0 |