terized by elements which are assembled, connected or fused, e.g. splittable tubes, outer sheaths creating lumina or separate cores (making of catheters A61M 25/0009)} [2013???01]A61M 2025/0035. . . . {characterized by a variable lumen cross-section by means of a resilient flexible septum or outer wall} [2013???01]A61M 2025/0036. . . . {with more than four lumina} [2013???01]A61M 2025/0037. . . .