Stent delivery apparatus and method
First Claim
1. A stent delivery system for implantation of a stent in a vessel comprising:
- an elongate flexible catheter having proximal and distal ends;
a stent having proximal and distal ends, the stent surrounding the flexible catheter near its distal end, the stent being in a delivery configuration where the stent has a reduced radius along its entire axial length;
a retractable sheath for retaining the stent in the delivery configuration and for deploying the stent, the sheath holding the self-expanding stent in its delivery configuration against the outwardly urging force of the self-expanding stent;
a retraction device for retracting the retractable sheath, the retraction device comprising a piston housing and a piston contained therein, the piston actatable by pressurized fluid supplied to at least a portion of the piston housing by an inflation lumen, the retraction device further comprising a connecting member, one end of which connects to the retractable sheath, the other end of the connecting member connecting to the piston,whereby the retractable sheath may be retracted by supplying a fluid under pressure to the inflation lumen so as to displace the piston, the piston in turn displacing the retractable sheath so as to expose at least a portion of the stent.
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Accused Products
Abstract
A delivery system for implantation of a self-expanding stent in a vessel is consists of an elongate flexible catheter for delivering a self-expanding stent to a predetermined location in a vessel. The stent surrounds the flexible catheter near its distal end and is held in a delivery configuration where the stent has a reduced radius along its entire axial length by a stent retaining and release means. The stent retaining and release means is a single layer sheath retaining sleeve means for retaining the stent in its delivery configuration attached to a slipping sleeve means for releasing the stent to self-expand. A balloon may optionally be used to seat the stent in the vessel after self-expansion. The stent may also optionally be retained by water soluble or swelling bands.
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Citations
16 Claims
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1. A stent delivery system for implantation of a stent in a vessel comprising:
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an elongate flexible catheter having proximal and distal ends; a stent having proximal and distal ends, the stent surrounding the flexible catheter near its distal end, the stent being in a delivery configuration where the stent has a reduced radius along its entire axial length; a retractable sheath for retaining the stent in the delivery configuration and for deploying the stent, the sheath holding the self-expanding stent in its delivery configuration against the outwardly urging force of the self-expanding stent; a retraction device for retracting the retractable sheath, the retraction device comprising a piston housing and a piston contained therein, the piston actatable by pressurized fluid supplied to at least a portion of the piston housing by an inflation lumen, the retraction device further comprising a connecting member, one end of which connects to the retractable sheath, the other end of the connecting member connecting to the piston, whereby the retractable sheath may be retracted by supplying a fluid under pressure to the inflation lumen so as to displace the piston, the piston in turn displacing the retractable sheath so as to expose at least a portion of the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medical device delivery system for delivering a medical device to a desired location in a bodily lumen comprising
an elongate flexible catheter having proximal and distal ends, the catheter having a medical device mounting region near its distal end for mounting thereon a medical device; -
a retractable sheath covering the medical device mounting region; a retraction device for retracting the retractable sheath, the retraction device comprising a piston housing and a piston contained therein, the piston in fluid communication with an inflation lumen, a connecting member, one end of which connects to the retractable sheath, the other end of the connecting member connecting to the piston, whereby the retractable sheath may be retracted by supplying a fluid under pressure to the inflation lumen so as to displace the piston, the piston in turn displacing the retractable sheath from its position over the medical device mounting region. - View Dependent Claims (13, 14, 15, 16)
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Specification