Implant including a coil and a stretch-resistant member
First Claim
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1. A coil implant, comprising:
- a first coil segment defining a first lumen having a first cross-sectional dimension;
a second coil segment, having at least a portion extending within the first lumen, the second segment being connected to the first segment and defining a second lumen having a second cross-sectional dimension, less than the first cross-sectional dimension;
a stretch-resistant member disposed within the first lumen; and
a rod comprising a proximal portion and a distal portion, the proximal portion having a proximal cross-sectional dimension less than the second cross-sectional dimension, and being configured to extend proximally past the second segment and configured to be received within the second lumen, and the distal portion (i) coupled to the stretch-resistant member, (ii) positioned within the first lumen distal to the second segment, and (iii) having a distal cross-sectional dimension greater than the second cross-sectional dimension;
wherein the rod is capable of moving completely into the first lumen distal to the second segment.
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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
22 Claims
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1. A coil implant, comprising:
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a first coil segment defining a first lumen having a first cross-sectional dimension; a second coil segment, having at least a portion extending within the first lumen, the second segment being connected to the first segment and defining a second lumen having a second cross-sectional dimension, less than the first cross-sectional dimension; a stretch-resistant member disposed within the first lumen; and a rod comprising a proximal portion and a distal portion, the proximal portion having a proximal cross-sectional dimension less than the second cross-sectional dimension, and being configured to extend proximally past the second segment and configured to be received within the second lumen, and the distal portion (i) coupled to the stretch-resistant member, (ii) positioned within the first lumen distal to the second segment, and (iii) having a distal cross-sectional dimension greater than the second cross-sectional dimension; wherein the rod is capable of moving completely into the first lumen distal to the second segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A coil implant, comprising:
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a first coil segment defining a first lumen; a second coil segment, having at least a portion extending within the first lumen, the second segment being connected to the first segment and defining a second lumen; a stretch-resistant member disposed within the first lumen; a rod comprising a proximal portion and a distal portion, the proximal portion being capable of moving, from a location proximal to the second segment, distally into the second lumen when released from a delivery device, and the distal portion being coupled to the stretch-resistant member in the first lumen distal to the second segment and configured to engage the second segment to limit proximal movement of the distal portion through the second lumen. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of treating a vascular site in a patient, comprising:
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introducing an implant to the site via a positioner, the implant comprising; a first coil segment defining a first lumen; a second coil segment, having at least a portion extending within the first lumen, the second segment being connected to the first segment and defining a second lumen; a stretch-resistant member disposed within the first lumen; and a rod comprising a proximal portion and a distal portion, the proximal portion being coupled with the positioner and the distal portion being coupled to the stretch-resistant member in the first lumen distal to the second segment and configured to engage the second segment to limit proximal movement of the distal portion through the second lumen; positioning the implant at the vascular site while the positioner is coupled with the proximal portion; and releasing the proximal portion from the positioner, such that the proximal portion moves distally into the second lumen from a location proximal to the second segment. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification