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    • 3. 发明授权
    • Handle for manipulation of a stylet used for deflecting a tip of a lead
or catheter
    • 用于操纵用于偏转铅或导管尖端的探针的手柄
    • US06132390A
    • 2000-10-17
    • US175164
    • 1998-10-19
    • H. Stephen CookstonEli GangJohn Wright
    • H. Stephen CookstonEli GangJohn Wright
    • A61B1/00A61B5/042A61M25/01A61N1/05
    • A61M25/0147A61M25/01A61M25/0155A61M25/0158A61N1/056A61N1/0565A61B5/042
    • A deflectable stylet is comprised of a hollow tube with a reduced diameter distal portion including a semi-cylindrical ground portion to provide localized flexure wherein tension is applied to an axial tension wire fixed to the distal end of the hollow tube. The hollow tube is coupled to a rotationally fixed tip coupled to a rotationally fixed handle body. The handle body and the tip are telescoped longitudinally with respect to each other along the longitudinal axis of the hollow tube by means of a rotatable nut that advances out of or backs the handle into the tip. The tension wire is coupled to the handle body so that when the nut is rotated in a first direction and the handle body backed out, tension is applied to the wire which is then withdrawn from the hollow tube fixed to the tip causing the stylet to curve at its distal end. Rotation of the nut in the opposite direction reduces the tension on the wire causing the stylet to straighten at its distal end. By this means fine, micrometer adjustments of the curvature of the stylet are reliably and repeatedly made. A conical tip of the handle is coupled to the catheter and provides stress relief to the stylet. The tip is freely rotatable with respect to the handle, but can be locked to the terminal pin of the catheter so that an active fixation pacemaker lead is activatable by rotation of the tip.
    • 可偏转的探针包括具有减小直径的远端部分的中空管,其包括半圆柱形接地部分以提供局部弯曲,其中张力施加到固定到中空管的远端的轴向张力线。 中空管联接到联接到旋转固定手柄主体的旋转固定末端。 手柄主体和尖端通过可旋转的螺母沿着中空管的纵向轴线相对于彼此纵向地伸缩,该可旋转的螺母将手柄前进或后退到尖端中。 张力丝联接到把手主体,使得当螺母沿第一方向旋转并且手柄本体被拉出时,张力被施加到线,然后将其从固定到尖端的中空管中取出,使得探针弯曲 在其远端。 螺母沿相反方向的旋转减少了钢丝绳上的张力,导致探针在其远端伸直。 通过这种方式,可以可靠且重复地进行精细的微米调节探针的曲率。 手柄的圆锥形尖端与导管相连,并为探针提供应力消除。 尖端相对于手柄可自由旋转,但是可以锁定到导管的端子销,使得通过尖端的旋转来激活主动定心起搏器引线。