Strain management in stent delivery system
First Claim
1. A delivery system for a medical implant, comprising:
- an inner catheter including a wire coil disposed between an inner tube and an outer tube, the wire coil having gaps between turns of the coil at a proximal and a distal region thereof, and the inner tube defines a medical implant bed at a distal end thereof;
an outer catheter disposed about the inner catheter;
a flow path for liquid from a proximal end to a distal end of the system, the flow path including a radially extending portion through the gaps;
a self-expanding stent, having a radially expanded configuration and a radially compressed configuration, disposed about the medical implant bed and maintained in the collapsed configuration by the outer catheter; and
a pusher element, including a flange portion, attached to the inner tube proximal of the stent bed, the flange portion abutting a proximal end of the stent preventing proximal movement thereof.
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Accused Products
Abstract
A delivery system for a medical implant and a method of delivering the medical implant. The delivery system includes an inner catheter and an outer catheter. The inner catheter includes a wire coil disposed between an inner tube and an outer tube, the wire coil having gaps between turns of the coil at a proximal and a distal region thereof. The outer catheter is disposed about the inner catheter. The system includes a flow path for liquid from a proximal end to a distal end thereof, the flow path including a radially extending portion through the gaps. The method includes inserting the delivery system into a body lumen, injecting visualizing fluid into the proximal end of the system, the visualizing fluid moving through the flow path and exiting the distal end of the system, and retracting the outer catheter to release the medical implant.
66 Citations
29 Claims
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1. A delivery system for a medical implant, comprising:
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an inner catheter including a wire coil disposed between an inner tube and an outer tube, the wire coil having gaps between turns of the coil at a proximal and a distal region thereof, and the inner tube defines a medical implant bed at a distal end thereof; an outer catheter disposed about the inner catheter; a flow path for liquid from a proximal end to a distal end of the system, the flow path including a radially extending portion through the gaps; a self-expanding stent, having a radially expanded configuration and a radially compressed configuration, disposed about the medical implant bed and maintained in the collapsed configuration by the outer catheter; and a pusher element, including a flange portion, attached to the inner tube proximal of the stent bed, the flange portion abutting a proximal end of the stent preventing proximal movement thereof. - 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)
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27. A method of delivering a medical implant to a body lumen, comprising:
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inserting a medical implant delivery system into the body lumen, the system including an inner catheter having a wire coil disposed between an inner tube and an outer tube, the wire coil having gaps between turns of the coil at a proximal and a distal region thereof, the inner tube defining a medical implant bed at a distal end thereof, an outer catheter disposed about the inner catheter, and a flow path for liquid from a proximal end to a distal end of the system, the flow path including a radially extending portion through the gaps, a self-expanding stent having a radially expanded configuration and a radially compressed configuration disposed about the medical implant bed and maintained in the collapsed configuration by the outer catheter, and a pusher element, including a flange portion, attached to the inner tube proximal of the stent bed, the flange portion abutting a proximal end of the stent preventing proximal movement thereof; injecting visualizing fluid into the proximal end of the delivery system, the visualizing fluid moving through the flow path and exiting the distal end of the system; and retracting the outer catheter proximally relative to the inner catheter to release a medical implant disposed between the outer catheter and inner catheter at the distal end of the delivery system. - View Dependent Claims (28, 29)
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Specification