title: "Knotting" of a pigtail catheter, and its successful removal.
mesh_terms: D001017:Aortic Coarctation / Q000000981:diagnostic imaging*; D001916:Brachial Artery / Q000601:surgery; D002404:Catheterization / Q000009:adverse effects*; D005263:Femoral Artery / Q000601:surgery; D006801:Humans; D008875:Middle Aged; D011859:Radiography