The provider uses ultrasound and/or fluoroscopy (imaging technologies that display live images on a video monitor) to place a catheter through the skin (percutaneously) into the renal pelvis to divert urine due to blockage within the renal pelvis or ureters. He may also inject contrast material to image the internal structures of the kidney (nephrostogram) and ureter (ureterogram). The procedure includes radiological supervision and interpretation.
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