*If proper position of a pigtail catheter, lock the pigtail. If unsure, confirm location within the renal pelvis by injection of a few ml of contrast before fixation.*
*Confirm functionality by injection of a few ml of contrast, two projections from different directions, looking for spontaneous dripping from the catheter when left open, as well as aspiration of the contrast.* <br>Check whether there is blood or pus in the aspirate or spontaneous return.
*Attach the outside end of the catheter to a bag.<ref group=notes>Plug it only if there is a clear plan to attach a bag at a specific later time.</ref>*Fixate the catheter to the skin, preferably both directly at insertion as well as enough to the side to have a soft S-shaped bend of the catheter in order to give certain room for stretching without pulling out the catheter.
==Troubleshooting==