Handle for manipulation of a stylet used for deflecting a tip of a lead or catheter
First Claim
1. A handle and deflectable stylet for disposition into a catheter comprising:
- a non-rotational handle body; and
a rotatable adjustment coupled to said handle body, said handle body being coupled to a deflectable stylet and adapted to apply a tension thereto to cause said stylet to deflect according to the degree of rotation of said adjustment relative to said non-rotational handle body,wherein said catheter has a terminal pin and wherein said handle body is further combined with a rotatable tip, said stylet being disposed through said tip such that said stylet is coupled to and rotationally fixed with respect to said handle body, said tip being rotationally free with respect to said handle body and selectively rotationally fixed to said terminal pin of said catheter.
1 Assignment
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Accused Products
Abstract
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the nut is rotated in a first direction and the handle body backed out, tension is applied to the wire which is then withdrawn from the hollow tube fixed to the tip causing the stylet to curve at its distal end.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.
204 Citations
21 Claims
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1. A handle and deflectable stylet for disposition into a catheter comprising:
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a non-rotational handle body; and a rotatable adjustment coupled to said handle body, said handle body being coupled to a deflectable stylet and adapted to apply a tension thereto to cause said stylet to deflect according to the degree of rotation of said adjustment relative to said non-rotational handle body, wherein said catheter has a terminal pin and wherein said handle body is further combined with a rotatable tip, said stylet being disposed through said tip such that said stylet is coupled to and rotationally fixed with respect to said handle body, said tip being rotationally free with respect to said handle body and selectively rotationally fixed to said terminal pin of said catheter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A handle and deflectable stylet for disposition into a catheter comprising:
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a non-rotational handle body; and a rotatable adjustment coupled to said handle body, said handle body being coupled to a deflectable stylet and adapted to apply a tension thereto to cause said stylet to deflect according to the degree of rotation of said adjustment relative to said non-rotational handle body, further comprising an attachment ring connected to said handle body to permit fixation of said handle with a field of operation.
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8. A handle and deflectable stylet for disposition into a catheter comprising:
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a non-rotational handle body; and a rotatable adjustment coupled to said handle body, said handle body being coupled to a deflectable stylet and adapted to apply a tension thereto to cause said stylet to deflect according to the degree of rotation of said adjustment relative to said non-rotational handle body, in further combination with said deflectable stylet, said deflectable stylet comprising a hollow tube having a distal end and a proximal end coupled to said handle, wherein said hollow tube has a central coaxial tension wire disposed therein and fixed thereto at said distal end of said tube, said hollow tube has a reduced diameter section through which said central coaxial tension wire is disposed, a portion of said reduced diameter section being removed to form a flexure section, said hollow tube having a distal portion in which said central coaxial tension wire is fixed, said distal portion having a full diameter and not being included within said flexure section. - View Dependent Claims (9, 10)
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11. A handle and deflectable stylet disposable within a lumen in a catheter, which stylet and catheter is curved upon application of tension to a tension wire disposed in said stylet and extending from its proximal end to its distal end wherein said tension wire is fixed, said handle comprising:
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a non-rotatable body adapted to be held by a user; and a screw micrometer telescopic adjustment for moving said non-rotatable body longitudinally relative to a catheter, said non-rotatable body being coupled to a tension wire so that said tension wire is drawn out of a deflectable stylet and tension applied to said tension wire to thereby curve said stylet and hence to curve said catheter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification