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    • 7. 发明申请
    • MEDICAL LEAD HAVING A VARIABLE CHANGE IN STIFFNESS
    • 具有可变性的医疗领域
    • US20070225784A1
    • 2007-09-27
    • US11277333
    • 2006-03-23
    • Mark BlyBrian SoltisBruce TockmanAvram Scheiner
    • Mark BlyBrian SoltisBruce TockmanAvram Scheiner
    • A61N1/05
    • A61N1/056A61N2001/0585
    • According to one embodiment, the present invention includes an elongate implantable medical lead having a distal portion that is relatively flexible, a proximal portion that is relatively stiff, and a transition portion which has a variable transition stiffness. The transition stiffness varies over the length of the transition portion that generally decreases in a distal direction. The relatively stiff proximal portion of the lead gives the lead steerability while the gradual change in stiffness in the transition portion reduces the likelihood that the lead will prolapse when it is guided into a branch vein. The distal stiffness is less than the proximal stiffness giving the lead a safe end that is unlikely to puncture vascular walls and is able to maneuver around various tortuosities when the lead is implanted into a patient.
    • 根据一个实施例,本发明包括细长的可植入医疗引线,其具有相对柔性的远侧部分,相对刚性的近端部分和具有可变过渡刚度的过渡部分。 过渡刚度在远端方向上通常减小的过渡部分的长度上变化。 引线的相对刚性的近端部分具有引导操纵性,而过渡部分中刚度的逐渐变化降低了当引导到分支静脉时引线脱垂的可能性。 远端刚度小于近端刚度,使得引线成为不可能穿透血管壁的安全端,并且当铅被植入患者时能够围绕各种曲折进行操纵。