Question: what are ureteral stents made of?
Answer: All ureteral stents are made of polyurethane or silicone; metallic stents are not used in ureters. A double-J ureteral stent is completely internal and has a “pigtail” at each end (Fig. 35-3A). Its proximal coil is situated in the renal pelvis, and its distal coil is situated in the urinary bladder.