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[[File:X-ray with contrast of a percutaneous gallbladder drain.jpg|thumb|Percutaneous drainage catheter (yellow arrow). In this control, the instilled radiocontrast is filling out the gallbladder (red arrow), where the filling defects are gallstones. The cystic duct (blue arrow) is tortuous, the common bile duct (green arrow) is patent, with tapering at ampulla Vateri (white arrow), but without obstruction. Contrast is seen extending into the duodenum (orange arrows), demonstrating open passage through the bile ducts.<ref name="PadillaHulsberg2018">{{cite journal|last1=Padilla|first1=Rebekah M|last2=Hulsberg|first2=Paul C|last3=Soule|first3=Erik|last4=Harmon|first4=Taylor S|last5=Eadie|first5=Erik|last6=Hood|first6=Preston|last7=Shabandi|first7=Michael|last8=Matteo|first8=Jerry|title=Against the Odds: A Novel Technique to Perform Cholangiography from a Percutaneous Approach through the Cystic Duct|journal=Cureus|year=2018|issn=2168-8184|doi=10.7759/cureus.3577}}</ref>]]

==Procedure==

*Take an initial anteroposterior image including the presumed locations of the gallbladder and common bile duct.

===Drain malposition===

If the drain is partially pulled out, it may be pushed into place, preferably with a hydrophilic guidewire.

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