Stent with detachable tethers and method of using same
First Claim
1. A stent delivery system comprising a stent and at least one tether detachably connected to the stent by a connecting member, the tether comprising a conductive material and the connecting member comprises a material selected from a group consisting of:
- a solder, a brazing paste, or an adhesive, the material subject to degradation upon application of an electrical current, the conductive material of the tether comprising a wire having a first impedance, and the connecting member having a second impedance higher than the first impedance.
2 Assignments
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Accused Products
Abstract
A stent delivery system comprising a stent and at least one tether detachably connected to the stent by a connecting member. In one embodiment, the tether may comprise a conductive material and the connecting member may comprise a material subject to degradation upon application of an electrical current. In another embodiment, the connecting member, the stent, and the tether each may have a mechanical strength, where the strength of the connecting member is less than the strength of the stent and the tether. In yet another embodiment, application of electrical current may weaken the connecting member sufficient to enable detachment of the tether. A method of deploying a stent uses the stent delivery device comprising a tether attached to the stent by a connecting member. The tether may be used for accurate positioning of the stent.
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Citations
28 Claims
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1. A stent delivery system comprising a stent and at least one tether detachably connected to the stent by a connecting member, the tether comprising a conductive material and the connecting member comprises a material selected from a group consisting of:
- a solder, a brazing paste, or an adhesive, the material subject to degradation upon application of an electrical current, the conductive material of the tether comprising a wire having a first impedance, and the connecting member having a second impedance higher than the first impedance.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of deploying a stent using a stent delivery device comprising a tether attached to the stent by a connecting member, a tubular delivery catheter having a distal portion on which the stent is axially mounted, and an outer sheath over the compressed stent and the delivery catheter, the connecting member comprising (i) a portion of the tether wherein the tether is helically wrapped about the stent to hold the stent in the compressed configuration, (ii) a solder, a brazing paste, or an adhesive, wherein the tether comprises a conductive wire having a first impedance and the connecting member has a second impedance higher than the first impedance such that the connecting member is subject to degradation upon application of an electrical current, or (iii) a combination of (i) and (ii), the method comprising the steps of:
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(a) inserting the stent delivery device into a lumen through an access location;
(b) navigating the stent delivery device to a deployment location;
(c) retracting the outer sheath and expanding the stent from a compressed configuration to an expanded configuration while using the tether to maintain the stent in the deployment location; and
(d) detaching the tether from the stent. - View Dependent Claims (13, 14, 15, 16, 17, 18)
(e) retracting the detached tether into the delivery device, and (f) removing the delivery device from the lumen.
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17. The method of claim 12 wherein step (c) comprises self-expansion of the stent.
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18. The method of claim 12 comprising deploying a stent to repair an ostial lesion.
- 19. A stent delivery system comprising a stent having a compressed configuration and an expanded configuration, at least one tether detachably connected to the stent by a connecting member, a tubular delivery catheter having a distal portion on which the stent is axially mounted, and an outer sheath over the compressed stent and the delivery catheter, the tether comprising a conductive material and the connecting member comprising a material subject to degradation upon application of an electrical current, the connecting member material comprising a solder, a brazing paste, or an adhesive, the conductive material of the tether comprising a wire having a first impedance, and the connecting member material having a second impedance higher than the first impedance.
Specification