Small diameter guidewires of multi-filar, cross-wound coils
First Claim
1. A medical guidewire having a distal tip portion for advancement through a body by application of axial force and by application of rotational force to a proximal end portion outside the body, said guidewire comprising:
- an elongated cross-wound multi-filar coil structural element, said structural element comprising a first multi-filar coil segment and a second multi-filar coil segment, said first and second multi-filar coil segments disposed adjacent and in close proximity to one another along a portion of the length of said structural element, anda sheath formed of material that is non-corrosive within the body, said sheath disposed about and along a substantial portion of the length of said structural element, said sheath being adapted to flex in unison with said structural element without kinking,said sheath and the adjacent said first and second multi-filar coil segments of said elongated cross-wound multi-filar coil structural element relatively arranged and constructed, in combination, for interengagement in response to rotational force applied to the proximal end in a manner to provide a torque response, along the joined length, approaching 1;
1, thereby allowing control of said distal tip of said guidewire within the body by application of rotational force to said proximal end portion outside the body.
3 Assignments
0 Petitions
Accused Products
Abstract
A medical guidewire having a distal tip portion for advancement through a body by application of force to a proximal end portion, comprising: an elongated multi-filar coil structural element, and disposed thereabout and along a substantial portion of the length of the structural element, a sheath formed of material that is non-corrosive within the body, the sheath being adapted to flex in unison with the structural element without kinking, the sheath and structural element in combination having a torque response along the joined length approaching 1:1, thereby allowing control of the distal tip at the guidewire within a body by application of rotational force to the proximal end portion outside the body.
151 Citations
20 Claims
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1. A medical guidewire having a distal tip portion for advancement through a body by application of axial force and by application of rotational force to a proximal end portion outside the body, said guidewire comprising:
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an elongated cross-wound multi-filar coil structural element, said structural element comprising a first multi-filar coil segment and a second multi-filar coil segment, said first and second multi-filar coil segments disposed adjacent and in close proximity to one another along a portion of the length of said structural element, and a sheath formed of material that is non-corrosive within the body, said sheath disposed about and along a substantial portion of the length of said structural element, said sheath being adapted to flex in unison with said structural element without kinking, said sheath and the adjacent said first and second multi-filar coil segments of said elongated cross-wound multi-filar coil structural element relatively arranged and constructed, in combination, for interengagement in response to rotational force applied to the proximal end in a manner to provide a torque response, along the joined length, approaching 1;
1, thereby allowing control of said distal tip of said guidewire within the body by application of rotational force to said proximal end portion outside the body. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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2. A medical guidewire having a distal tip portion for advancement through a body by application of axial force and by application of rotational force to a proximal end portion outside the body, said guidewire comprising:
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an elongated cross-wound multi-filar coil structural element, said structural element comprising a first multi-filar coil segment and a second multi-filar coil segment, said first and second multi-filar coil segments disposed adjacent and in close proximity to one another along a portion of the length of said structural element, and a sheath formed of material that is non-corrosive within the body, said sheath disposed about and along a substantial portion of the length of said structural element, said sheath being adapted to flex in unison with said structural element without kinking, said sheath and the adjacent said first and second multi-filar coil segments of said elongated cross-wound multi-filar coil structural element relatively arranged and constructed, in combination, for interengagement in response to rotational force applied to the proximal end in a manner to provide a torque response, along the joined length, approaching 1;
1, thereby allowing control of said distal tip of said guidewire within the body by application of rotational force to said proximal end portion outside the body;
the distal end of said elongated cross-wound multi-filar coil structural and said sheath defining an opening for delivery of a fluid through said element to a body cavity. - View Dependent Claims (16)
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17. A medical guidewire having a distal tip portion for advancement through a body by application of axial force and by application of rotational force to a proximal end portion outside the body, said guidewire comprising:
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an elongated cross-wound multi-filar coil structural element, said structural element comprising a first multi-filar coil segment and a second multi-filar coil segment, said first and second multi-filar coil segments disposed adjacent and in close proximity to one another along a portion of the length of said structural element, and a sheath formed of material that is non-corrosive within the body, said sheath disposed about and along a substantial portion of the length of said structural element, said sheath extending along the distal end of said structural element and being fixed at the distal end of said element, and said sheath being adapted to flex in unison with said structural element without kinking, said sheath and the adjacent said first and second multi-filar coil segments of said cross-wound multi-filar coil structural element relatively arranged and constructed, in combination, for interengagement in response to rotational force applied to the proximal end in a manner to provide a torque response, along the joined length, approaching 1;
1, thereby allowing control of said distal tip of said guidewire within the body by application of rotational force to said proximal end portion outside the body. - View Dependent Claims (18, 19, 20)
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Specification