Ureteral stent and manufacture method therefor

A ureteral stent, comprising at least one pre-coating formed on its surface and at least one hydrophilic lubricating coating formed on the pre-coating,

• wherein the pre-coating is formed by a pre-coated coating composition, the pre-coated coating composition comprises photocurable polyurethane, a polymerizable hydrophilic polymer and a solvent, the main chain of the photocurable polyurethane contains a tertiary amine group, the side chain thereof has an unsaturated double bond group and a photosensitive group unit, and the side chain of the polymerizable hydrophilic polymer has an unsaturated double bond group;
• and
• the hydrophilic lubricating coating is formed by a hydrophilic lubricating coating composition, the hydrophilic lubricating coating composition comprises a photocurable polymer, the photocurable polymer is copolymerized by a water-soluble polymerizable photosensitive monomer and a hydrophilic monomer, the water-soluble polymerizable photosensitive monomer contains:
• 1) a unit containing a photosensitive structure;
• 2) a unit containing a quaternary ammonium salt structure;
• and 3) a unit containing an unsaturated bond structure;
• and the unit containing a photosensitive structure connected to the unit containing a quaternary ammonium salt structure at least through —C(═O)—, and the unit containing an unsaturated bond structure connected to the unit containing a photosensitive structure through the unit containing a quaternary ammonium salt structure.