Changes

If a previous pigtail catheter is located in a calyx, push it in with a stiff guidewire (such as Amplatz). The If this is not directly successful, try:*Push the catheter may need to be pushed from different angles, and/or be rotatedrotate.**Use the stiffer end of the Amplatz wire.*Loosen the pigtail.<brref group="notes" name="loosen"/>If this is not successful, possibly use a hydrophilic guidewire to reach the renal pelvis, on which to switch catheters.*