artificial urinary sphincter
Definition: (YOOR-ih-NEHR-ee SFINK-tur) Used to replace the body's sphincter when damaged or cannot operate. An endoprosthesis surgically placed in (endo-) the body to control the passage of urine from the bladder
Pictured here is one made by American Medical Systems. More diagrams are at this site.
This is not an endorsement but for illustration only.