Section 876.4630 - Ureteral stent accessories(a)Identification. Ureteral stent accessories aid in the insertion of the ureteral stent that is placed into the ureter to provide ureteral rigidity and allow the passage of urine. This generic type of device includes the stent positioner, wire guide, and pigtail straightener.(b)Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 876.9 . 84 FR 14870 , Apr. 12, 2019