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    • 1. 发明授权
    • Multiple segment catheter and method of fabrication
    • 多段导管及其制造方法
    • US06591472B1
    • 2003-07-15
    • US09207644
    • 1998-12-08
    • Michael S. NooneAlbert H. DunfeeMatthew S. Poole
    • Michael S. NooneAlbert H. DunfeeMatthew S. Poole
    • B23P1700
    • A61M25/0045A61M25/0009A61M25/0012A61M25/0015B29L2031/7542Y10T29/49798Y10T29/49982
    • Methods of fabricating medical vascular catheters adapted to be inserted into a blood vessel from an incision through the skin of a patient for introducing other devices or fluids for diagnostic or therapeutic purposes and particularly methods for fabricating such catheters with catheter bodies having catheter sections of differing flexibility are disclosed. Such catheter bodies having a proximal catheter body end and a distal catheter body end and formed of a proximal section and at least one distal section that have differing flexibilities are formed in a process comprising the steps of: (1) forming a continuous tubular inner jacket preferably of an inner liner and a reinforcement layer; (2) forming initial layer segments having an initial layer thickness along the length of the inner jacket from a material of first durometer hardness, whereby each initial layer segment is separated by a separation distance: (3) forming a final layer of a material of second durometer hardness with a second layer thickness over the tubular inner jacket along the separation distances and over and/or against the proximal and distal initial layer ends of the initial layer segments to form a continuous catheter body tubing; (4) severing the continuous catheter body tubing into catheter body lengths including a proximal catheter section formed of the material of second hardness and a distal catheter section of the material of first hardness; and (5) completing the catheter fabrication at the proximal catheter body end and the distal catheter body end. Centerless grinding of the catheter body or body tubing, formation of Intermediate catheter body sections, distal soft tips, and discontinuities in the reinforcement layer formed prior to step (2) are also disclosed.
    • 制造医用血管导管的方法,其适于从切口穿过患者皮肤插入血管,用于引入其他装置或流体用于诊断或治疗目的,特别是制造具有导管体的方法,导管体具有不同柔性的导管部分 被披露。 具有近端导管主体端部和远侧导管主体端部并且由近端部分和至少一个具有不同柔性的远端部分形成的这种导管体形成在包括以下步骤的过程中:(1)形成连续的管状内护套 优选内衬和加强层; (2)从第一硬度硬度的材料形成具有沿着内护套长度的初始层厚度的初始层段,由此每个初始层段被隔开间隔距离:(3)形成最终层的材料的最终层 沿着分隔距离在管状内套上方具有第二层厚度的第二硬度计硬度,并且在初始层段的上和/或靠近初始和最初的初始层端部以形成连续的导管体管; (4)将连续导管体管切断成导管主体长度,包括由第二硬度的材料形成的近端导管部分和第一硬度材料的远侧导管部分; 和(5)在近端导管主体端和远侧导管主体端完成导管制造。 还公开了导管主体或体管的无心磨削,中间导管主体部分的形成,远端软尖端和在步骤(2)之前形成的加强层中的不连续性)。