Stent delivery system having stent securement means
First Claim
1. A stent delivery system used for delivering a stent of predetermined size comprising in combination:
- a catheter having a shaft, the shaft having a diameter, and a expandable means associated therewith at a distal part of the shaft, the expandable means having an expanded state and a contracted state, the catheter further including mounting and retaining means providing a seat for supporting and receiving a stent on the expandable means for radial expansion of the stent of said predetermined size upon expansion of the expandable means, the mounting and retaining means including at least two axially spaced mounting bodies carried on the shaft inside the expandable means, whereby the diameter of the shaft, when the expandable means is in its contracted state, are increased at the distal part of the shaft for facilitating the mounting and retaining of the stent of said predetermined size, wherein when a stent of said predetermined size is crimped onto the catheter it will be seated over the at least two mounting bodies and wherein a portion of the stent of said predetermined size between the mounting bodies would be crimped to a lesser diameter than that of the mounting bodies when said stent of said predetermined size is crimped onto the catheter.
1 Assignment
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Accused Products
Abstract
A stent delivery system to facilitate introduction and placement of a stent, including a catheter having an expandable distal portion constructed and arranged for expanding the outer diameter of the catheter from a contracted state to an expanded state: a stent positioned around the distal portion of the catheter having a contracted condition and being expandable to an expanded condition, and being sized in the contracted condition to closely surround the catheter in the contracted state, the expandable distal portion of the catheter including a balloon within which there is included on the catheter shaft at least one body of a diameter larger than the catheter shaft to which the stent and balloon are fitted, as by crimping, for holding the stent in place until it is released therefrom by expansion of the balloon and further including axially slidable sleeves over the stent in the unexpanded condition.
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Citations
25 Claims
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1. A stent delivery system used for delivering a stent of predetermined size comprising in combination:
a catheter having a shaft, the shaft having a diameter, and a expandable means associated therewith at a distal part of the shaft, the expandable means having an expanded state and a contracted state, the catheter further including mounting and retaining means providing a seat for supporting and receiving a stent on the expandable means for radial expansion of the stent of said predetermined size upon expansion of the expandable means, the mounting and retaining means including at least two axially spaced mounting bodies carried on the shaft inside the expandable means, whereby the diameter of the shaft, when the expandable means is in its contracted state, are increased at the distal part of the shaft for facilitating the mounting and retaining of the stent of said predetermined size, wherein when a stent of said predetermined size is crimped onto the catheter it will be seated over the at least two mounting bodies and wherein a portion of the stent of said predetermined size between the mounting bodies would be crimped to a lesser diameter than that of the mounting bodies when said stent of said predetermined size is crimped onto the catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A stent delivery system comprising in combination:
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a radially expandable stent of generally cylindrical configuration, the stent having a predetermined size, and a catheter having a shaft, the shaft having a diameter, and an expandable means associated with the shaft at a distal part of the shaft, the expandable means having an expanded state and a contract state, the catheter further including mounting and retaining means for receiving the stent of said predetermined size on the expandable means for radial expansion of the stent of said predetermined size upon expansion of the expandable means, the mounting and retaining means including at least one mounting body, the at least one mounting body having a length and an outer surface diameter and being carried on the shaft inside the expandable means, the outer surface diameter of the at least one mounting body being substantially constant along its length, whereby the diameter of the shaft and expandable means, when the expandable means is in its contracted state, are increased at the distal part of the shaft for facilitating the mounting and retaining of the stent of said predetermined size, wherein the stent of said predetermined size is crimped onto the at least one mounting body, and further including a sleeve at the distal portion of the catheter, the sleeve having a first end attached to the catheter and a second end overlying an end portion of the stent of said predetermined size, wherein, when the expandable means is expanded, the second end of the sleeve slides off from over the end portion of the stent, releasing the stent, while the first end of the sleeve remains relatively stationary relative to the shaft. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification