Wire guide having variable flexibility and method of use thereof
First Claim
Patent Images
1. A wire guide comprising:
- a distal tip,a core element having a proximal connector, wherein a distal end of the core element connects to the distal tip,an outer coil disposed coaxially around the core element and having a distal end attached to the distal tip and a proximal end attached to the proximal connector,an inner coil disposed coaxially around the core element between the core element and the outer coil, wherein a distal end of the inner coil attaches to the distal tip, anda shaft element disposed proximally of the inner coil between the core element and the outer coil, wherein a distal end of the shaft element attaches to a proximal end of the inner coil, wherein the shaft element extends through the proximal connector and is movable axially relative to the distal tip whereby an extension of the inner coil is changed.
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Abstract
The present invention generally relates to a medical surgical device and specifically a wire guide for percutaneous placement within a body cavity. The flexibility of the wire guide may be varied while it is in place within the body vessel.
21 Citations
19 Claims
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1. A wire guide comprising:
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a distal tip, a core element having a proximal connector, wherein a distal end of the core element connects to the distal tip, an outer coil disposed coaxially around the core element and having a distal end attached to the distal tip and a proximal end attached to the proximal connector, an inner coil disposed coaxially around the core element between the core element and the outer coil, wherein a distal end of the inner coil attaches to the distal tip, and a shaft element disposed proximally of the inner coil between the core element and the outer coil, wherein a distal end of the shaft element attaches to a proximal end of the inner coil, wherein the shaft element extends through the proximal connector and is movable axially relative to the distal tip whereby an extension of the inner coil is changed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wire guide comprising:
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a distal tip, a proximal connector, an outer coil extending from the distal tip to the proximal connector and having a distal end attached to the distal tip and a proximal end attached to the proximal connector, an inner coil disposed coaxially within the outer coil, wherein a distal end of the inner coil attaches to the distal tip, and a shaft element disposed proximally of the inner coil within the outer coil, wherein a distal end of the shaft element attaches to a proximal end of the inner coil, wherein the shaft element extends through the proximal connector and is movable axially relative to the distal tip whereby an extension of the inner coil is changed. - View Dependent Claims (16, 17, 18)
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19. A wire guide comprising:
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a distal tip, a proximal connector, a core element extending from the distal tip to the proximal connector, wherein the core element comprises at least one taper reducing a cross section of a distal portion of the core element relative to a proximal portion of the core element, an outer coil disposed coaxially around the core element and having a distal end attached to the distal tip and a proximal end attached to the proximal connector, wherein the outer coil comprises stainless steel or a stainless steel alloy, an inner coil disposed coaxially around the core element between the core element and the outer coil, wherein a distal end of the inner coil attaches to the distal tip and wherein the inner coil comprises stainless steel or a stainless steel alloy, and a shaft element disposed proximally of the inner coil between the core element and the outer coil, wherein a distal end of the shaft element attaches to a proximal end of the inner coil, wherein the shaft element extends through the proximal connector and is movable axially relative to the distal tip whereby an extension of the inner coil is changed.
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Specification