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    • 8. 发明授权
    • Retraction stop for helical medical lead electrode
    • 螺旋状医用铅电极回缩停止
    • US5837006A
    • 1998-11-17
    • US711747
    • 1996-09-10
    • Jon M. OcelGregory A. BoserTimothy W. Holleman
    • Jon M. OcelGregory A. BoserTimothy W. Holleman
    • A61N1/05
    • A61N1/0573
    • In an endocardial, active fixation, screw-in lead of the type having a fixation helix adapted to be rotated in a first, advancement direction out of an electrode head chamber and into cardiac tissue by rotation of a lead connector end and attached lead conductor with respect to an insulating sheath in the first direction and retracted into the chamber by rotation of the lead connector in the opposite, retraction direction, a retraction stop mechanism for preventing over rotation of the helix in the retraction direction. The rotational motion of the lead conductor is transmitted to the helix by a connecting assembly and is translated into axial advancement and retraction of the helix by a guide cooperating with the helix turns. A retraction stop mechanism stops rotation of the helix in the retraction direction upon full retraction of the helix into the chamber and allows rotation of helix in the advancement direction. The retraction stop mechanism includes a fixed stop formed of a plurality of fixed cam and axial stop surfaces surrounding a proximal end bore of the chamber through which the lead conductor passes and a movable stop formed in the connecting mechanism of a like plurality of rotatable cam and axial stop surfaces aligned to face the fixed cam and axial stop surfaces adapted to engage in a locked relation of the stop surfaces upon full retraction of the fixation device into the chamber.
    • 在心内膜,主动固定中,具有固定螺旋的类型的螺钉引导件,其适于通过引导连接器端部和连接的引线导体的旋转而沿第一前进方向从电极头腔室旋转并进入心脏组织, 相对于第一方向上的绝缘护套并且通过引导连接器沿相反的缩回方向的旋转而缩回到腔室中,用于防止螺旋线沿收回方向过度旋转的缩回停止机构。 引线导体的旋转运动通过连接组件传递到螺旋线,并且通过与螺旋线圈配合的导向器被转换为螺旋线的轴向前进和缩回。 缩回停止机构在将螺旋完全缩回到室中后能够阻止螺旋在回缩方向的旋转,并允许螺旋在推进方向上旋转。 缩回停止机构包括由多个固定凸轮和围绕引线导体穿过的室的近端孔的轴向止动表面形成的固定止动件,以及形成在类似多个可旋转凸轮的连接机构中的可移动止动件, 轴向止动表面,其对准固定凸轮和轴向止动表面,适于在固定装置完全缩回到腔室中时与止动表面接合。
    • 9. 发明授权
    • Implantable electrode
    • 可植入电极
    • US5115818A
    • 1992-05-26
    • US639632
    • 1991-01-10
    • Timothy W. HollemanSandra F. Viktora
    • Timothy W. HollemanSandra F. Viktora
    • A61N1/05
    • A61N1/056
    • An implantable electrode of the type in which an elongated wire coil forms the electrode surface. The electrode coil is mounted around an insulative lead body and is stabilized on the lead body by means of a plastic filler between the individual turns of the electrode coil, extending radially outward to approximately one-third of the diameter of the electrode coil wire. The filler is produced by stretching a portion of the lead body which normally displays an outer diameter greater than the inner diameter of the electrode coil, sliding the electrode coil over the lead body and inserting a mandral into the lead body to urge the lead body into contact with the electrode coil. This assembly is heated to encourage flow of the lead body into the spaces between the electrode coil to stabilize the coil on electrode body and to prevent fibrotic ingrowth around the electrode coil wire.
    • 一种其中细长的线圈形成电极表面的类型的可植入电极。 电极线圈安装在绝缘引线体周围,并通过电极线圈的各匝之间的塑料填充物在引线体上稳定,径向向外延伸至电极线圈线直径的大约三分之一。 通过拉伸通常显示大于电极线圈的内径的外径的引线体的一部分来制造填充物,将电极线圈滑动到引线主体上并且将铅笔插入引线体中以将引线体引导 与电极线圈接触。 加热该组件以促使引线体流入电极线圈之间的空间,以使电极体上的线圈稳定并防止电极线圈线周围的纤维向内生长。