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→Insertion of new catheter: Another note
===Insertion of new catheter===
*Insert the new catheter with obturator over the guidewire, <ref group="notes>It is useful to let an assistant advance the catheter tip until reaching skin level, letting you keep the position of the guidewire.</ref> keeping the same direction as the guidewire through the tissues to avoid pulling or kinking it.*
*Enter the renal pelvis with the obturator, and then advance with only the soft catheter.*
*Confirm proper location within the renal pelvis by injection of a few ml of contrast, with two projections from different directions.*
