阅读说明：本技术 弹性引入件套管 (Elastic lead-through casing ) 是由 M·安德森 于 2018-04-10 设计创作，主要内容包括：公开了一种包括外层(54)、内层(52)和扩张器(14)的引入件套管系统(10)。外层在第一纵向边缘(56)与第二纵向边缘(58)之间周向延伸。在第一纵向边缘与第二纵向边缘之间限定可扩张间隙(60)。内层设置在外层内。内层构造成可连续地周向扩张。内层包括未延伸状态,其具有在外层内部周向延伸的周向部分以及延伸到内层的内部空腔中的折叠部分(64)。内层包括延伸状态,在延伸状态下,折叠部分在第一纵向边缘与第二纵向边缘之间至少部分地周向延伸。扩张器可在内层内纵向延伸。扩张器包括构造成容纳内层的折叠部分的凹部(28)。(Disclose a kind of lead-through cannula system (10) including outer layer (54), internal layer (52) and expander (14).Outer layer circumferentially extends between first longitudinal direction edge (56) and second longitudinal direction edge (58).Expansible gap (60) are limited between first longitudinal direction edge and second longitudinal direction edge.Internal layer is arranged in outer layer.Internal layer is configured to can continuously adjacent circumferential expansion.Internal layer includes non-extension state, has the folded portion (64) in the circumferential portion that outer layer internal circumferential extends and the internal cavities for extending to internal layer.Internal layer includes extension state, and in an extended condition, folded portion at least partially circumferentially extends between first longitudinal direction edge and second longitudinal direction edge.Expander can longitudinally extend in internal layer.Expander includes the recess portion (28) for being configured to accommodate the folded portion of internal layer.)