Stent Delivery System Having Stent Securement Apparatus

Abstract

A system / assembly for delivery and deployment of an inflation expandable stent within a vessel, comprising a catheter having proximal and distal ends; a stent, inflation expandable from a delivery diameter to a deployment diameter, such that the delivery diameter is reduced from the deployment diameter for conforming the stent to the catheter, such that the stent, in its delivery diameter, is coaxially mounted on the catheter near the catheter distal end; an expandable inflation means coaxially mounted on the catheter axially within the stent, for expansion of the stent from the delivery diameter to the deployment diameter upon application of fluid deployment pressure to the inflation means; and a securement component coaxially mounted on the catheter, axially within the expandable inflation means, the securement component designed and adapted to provide a securement pressure to the stent in the delivery diameter to maintain the stent in position on the catheter during delivery to the deployment site.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. Ser. No. 10 / 737,497, filed Dec. 16, 2003 and issued as U.S. Pat. No. 7,670,364, which is a continuation of U.S. Ser. No. 09 / 794,648, filed Feb. 27, 2001 and issued as U.S. Pat. No. 6,663,660, which is a continuation of U.S. Ser. No. 09 / 418,277, filed Oct. 14, 1999 and issued as U.S. Pat. No. 6,203,558, which is a continuation of U.S. Ser. No. 08 / 916,544, filed Aug. 22, 1997 and issued as U.S. Pat. No. 5,968,069, which is a Continuation-in part application based on U.S. Ser. No. 08 / 807,791, filed Feb. 28, 1997 and issued as U.S. Pat. No. 6,077,273, U.S. Ser. No. 08 / 702,150, filed Aug. 23, 1996 and issued as U.S. Pat. No. 6,007,543, U.S. Ser. No. 08 / 697,453, filed Aug. 23, 1996 abandoned, and U.S. Ser. No. 08 / 701,979, filed Aug. 23, 1996 and issued as U.S. Pat. No. 6,395,008, all of which are incorporated by reference in their entirety.FIELD OF THE INVENTION[0002]This invention relates to an...

AI Technical Summary

Benefits of technology

[0014]An alternative embodiment of present invention is also an assembly for delivery and deployment of an inflation expandable stent within a vessel. The assembly comprises a catheter, an expandable balloon mounted on the catheter, a corrugated tubing mounted on the catheter beneath or within the balloon, and a stent mounted on the balloon. The catheter has proximal and distal ends. The stent is inflation expandable from a delivery diameter to a deployment diameter. The delivery diameter is reduced from the deployment diameter for conforming the stent to the catheter. The stent, in its delivery diameter, is coaxially mounted on the catheter near the catheter distal end. The expandable balloon is coaxially mounted on the catheter axially within the stent. The balloon is designed and adapted for expansion of the stent from the delivery diameter to the deployment diameter upon application of fluid deployment pressure to the balloon. The corrugated tubing is mounted and adhered coaxially onto the catheter and is situated between the balloon and the catheter itself When the stent is crimped and loaded onto the balloon, the balloon is situated therefore between the stent and the corrugated tubing. The tubing is preferably essentially equal to the length of the stent and the stent is positioned on the assembly essentially co-extensive with the tube component. The tubing on the catheter effectively holds the stent in place, takes up the slack due to recoil and protects the balloon material from being damaged during crimping.

Problems solved by technology

During delivery, the stent can thus tend to slip and dislocate from its desired position on the catheter or even become separate from the catheter, requiring further intervention by the physician.

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