You will lie on your stomach, usually with one side slightly raised on a pillow, and will receive an injection of a painkiller and a sedative. The interventional radiologist will insert a needle through your skin and into your kidney under the guidance of ultrasound, X-ray or CT. If you already have a nephrostomy catheter in place, the interventional radiologist will use this as the entry point for the needle into the skin.
The interventional radiologist will use the needle to insert a wire, which is then used to guide a nephrostomy tube into your kidney, and a catheter, which is led through the ureter and into your bladder. At this stage, you may experience discomfort in your bladder. The interventional radiologist then places the J-J stent over the wire. You may also have a nephrostomy catheter placed in your kidney to drain urine externally.
A ureteric stent must be changed every three to six months. This is usually performed as an outpatient procedure.