Implant including a coil and a stretch-resistant member
First Claim
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1. An implant, comprising:
- a primary coil defining a lumen disposed along an axis, the primary coil having a proximal end defining a proximal aperture and a distal end defining a distal aperture;
a secondary coil further defining the proximal aperture which secondary coil is coaxial with the primary coil and having an outer diameter, an inner diameter, a distal end and a proximal end;
a stretch-resistant member disposed within the lumen;
a member comprising a proximal member section, a distal member section and a central axis that intersects the proximal aperture, the distal member section being coupled to the stretch-resistant member within the lumen, the proximal member section having an engagement portion exterior to the lumen wherein said engagement portion and said member are capable of moving distally into the lumen, the distal member section configured to engage the inner diameter of the secondary coil to prevent proximal extraction of the member from the secondary coil, the member being freely distally movable with respect to said secondary coil; and
a retainer engaging the distal aperture and coupled to the stretch-resistant member within the lumen.
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Abstract
This invention is directed to implantable coils and, more particularly, to a coil implant having a stretch-resistant member internal to the coil. The implant of the invention is able to freely articulate and torque prior to delivery. Once delivered, the implant is no longer stretch resistant and is therefore able to substantially conform to the vascular site.
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Citations
45 Claims
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1. An implant, comprising:
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a primary coil defining a lumen disposed along an axis, the primary coil having a proximal end defining a proximal aperture and a distal end defining a distal aperture; a secondary coil further defining the proximal aperture which secondary coil is coaxial with the primary coil and having an outer diameter, an inner diameter, a distal end and a proximal end; a stretch-resistant member disposed within the lumen; a member comprising a proximal member section, a distal member section and a central axis that intersects the proximal aperture, the distal member section being coupled to the stretch-resistant member within the lumen, the proximal member section having an engagement portion exterior to the lumen wherein said engagement portion and said member are capable of moving distally into the lumen, the distal member section configured to engage the inner diameter of the secondary coil to prevent proximal extraction of the member from the secondary coil, the member being freely distally movable with respect to said secondary coil; and a retainer engaging the distal aperture and coupled to the stretch-resistant member within the lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of embolizing a vascular site in a patient, comprising:
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introducing to said site via a positioner an implant, the implant comprising a primary coil defining a lumen disposed along an axis, the primary coil having a proximal end defining a proximal aperture and a distal end defining a distal aperture; a secondary coil further defining the proximal aperture which secondary coil is coaxial with the primary coil and having an outer diameter, an inner diameter, a distal end and a proximal end; a stretch-resistant member disposed in the lumen; a retainer engaging the distal aperture and coupled to the stretch-resistant member within the lumen; and a member comprising a proximal member section, a distal member section and a central axis that intersects the proximal aperture, the distal member section being coupled to the stretch-resistant member within the lumen, the proximal member section having an engagement portion exterior to the lumen, wherein said member is capable of moving distally into the lumen, the distal member section configured to engage the inner diameter of the secondary coil to prevent proximal extraction of the member from the secondary coil, the member being freely distally movable with respect to said secondary coil; detaching said implant from the positioner by disengaging the positioner from the engagement portion of said member, wherein said detaching step comprises moving the member distally into the lumen; and embolizing the vascular site. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification