Guidewire with deflectable tip
First Claim
Patent Images
1. A bi-directional steerable guidewire having a deflectable tip which comprises:
- an elongated flexible tubing having proximal and distal portions;
a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the flexible tubing;
an elongated deflection member having proximal and distal portions and being slidably disposed within said tubing and within said helical coil, the distal portion of said deflection member being flattened to form a deflection ribbon which extends in a plane;
a retaining ribbon having proximal and distal ends, the proximal end of the retaining ribbon is attached to the distal portion of the flexible tubing and the retaining ribbon is oriented to extend in a plane which is generally parallel to the plane of the deflection ribbon; and
,an attachment member engaging the distal end of the helical coil, the distal portion of the deflection member and the distal end of the retaining ribbon so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in another opposite direction, said attachment member takes the form of a rounded bead which contacts the distal end of the helical coil to define a circular surface at the distal end of the coil and the deflection ribbon engages the rounded bead at a location offset from the center of the circular surface of the rounded bead, said distal end of the retaining ribbon engages the rounded bead at a location offset from the center of the circular surface in an opposite direction from the offset location of the deflection ribbon.
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Accused Products
Abstract
A bi-directional steerable guidewire having a deflectable distal tip which comprises a longitudinal hypotube and a spring coil attached to the distal end of the hypotube and also includes a longitudinally movable deflection member which is attached to the distal end of the spring coil and a tip retaining member which extends from the distal end of the hypotube to the distal end of the spring coil for providing very precise deflection of the distal tip.
217 Citations
29 Claims
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1. A bi-directional steerable guidewire having a deflectable tip which comprises:
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an elongated flexible tubing having proximal and distal portions; a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the flexible tubing; an elongated deflection member having proximal and distal portions and being slidably disposed within said tubing and within said helical coil, the distal portion of said deflection member being flattened to form a deflection ribbon which extends in a plane; a retaining ribbon having proximal and distal ends, the proximal end of the retaining ribbon is attached to the distal portion of the flexible tubing and the retaining ribbon is oriented to extend in a plane which is generally parallel to the plane of the deflection ribbon; and
,an attachment member engaging the distal end of the helical coil, the distal portion of the deflection member and the distal end of the retaining ribbon so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in another opposite direction, said attachment member takes the form of a rounded bead which contacts the distal end of the helical coil to define a circular surface at the distal end of the coil and the deflection ribbon engages the rounded bead at a location offset from the center of the circular surface of the rounded bead, said distal end of the retaining ribbon engages the rounded bead at a location offset from the center of the circular surface in an opposite direction from the offset location of the deflection ribbon. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bi-directional steerable guidewire having a deflectable tip which comprises:
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an elongated flexible tubing having proximal and distal portions; a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the flexible tubing; an elongated deflection member having proximal and distal portions and being slidably disposed within said tubing and within said helical coil, the distal portion of said deflection member being tapered; an elongated retaining member having proximal and distal ends, the proximal end of the retaining member is attached to the distal portion of the flexible tubing, said retaining member is pre-shaped in an arcuate configuration to thereby cause the flexible helical coil to be normally biased into a curved shape; and
,an attachment member engaging the distal end of the helical coil, the deflection member and the distal end of the retaining member so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in an opposite direction, wherein a portion of the attachment member extends across the distal end of the helical coil and the distal portion of the deflection member engages the attachment member at a location offset from the center of the portion of the attachment member extending across the distal end of the helical coil. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A steerable guidewire having a deflectable tip which comprises:
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an elongated flexible tubing having proximal and distal portions; a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the flexible tubing; an elongated deflection member comprised of proximal and distal portions and being slidably disposed within said tubing and within said helical coil, the proximal portion of the deflection member being of a cylindrical cross section and the distal portion of said deflection member takes the form a deflection ribbon which extends in a plane, said distal portion of the deflection member and the deflection ribbon are formed from a wire of a circular cross section and in which the distal portion of the deflection member is flattened to form the deflection ribbon; a retaining ribbon having proximal and distal ends, the proximal end of the retaining ribbon is attached to the distal portion of the flexible tubing and the retaining ribbon is oriented to extend in a plane which is generally parallel to the plane of the deflection ribbon; and
,an attachment member engaging the distal end of the helical coil, the distal portion of the deflection member and the distal end of the retaining ribbon so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in another opposite direction, said attachment member takes the form of a rounded bead which contacts the distal end of the helical coil to define a circular surface at the distal end of the coil and the deflection ribbon engages the rounded bead at a location offset from the center of the circular surface of the rounded bead. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A bi-directional steerable guidewire having a deflectable tip which comprises:
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an elongated flexible tubing having proximal and distal portions; a flexible cylindrical member having proximal and distal ends, the proximal end of said cylindrical member is attached to the distal portion of the flexible tubing; an elongated deflection member having proximal and distal portions and being slidably disposed within said tubing and within said cylindrical member, the distal portion of said deflection member being tapered, said distal portion of the elongated deflection member takes the form of a thin ribbon which extends in a plane; an elongated retaining member having proximal and distal ends, the proximal end of the retaining member is attached to the distal portion of the flexible tubing, said retaining member is pre-shaped in an arcuate configuration to thereby cause the flexible cylindrical member to be normally biased into a curved shape; and
said retaining member takes the form of a thin ribbon which is oriented to extend in a plane which is generally parallel to the plane of the deflection member; and
,an attachment member engaging the distal end of the cylindrical member, the deflection member and the distal end of the retaining member so that longitudinal movement of the deflection member in a distal direction causes the distal end of the cylindrical member to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the cylindrical member to deflect in an opposite direction, said attachment member takes the form of a rounded bead and wherein a portion of the attachment member extends across the distal end of the cylindrical member, the distal portion of the deflection member engages the attachment member at a location offset from the center of the portion of the attachment member extending across the distal end of the cylindrical member. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification