Controllable stent delivery system and method
First Claim
Patent Images
1. A system for delivering a radially expandable stent for implantation within a body vessel, comprising:
- an elongated tubular member comprising an inner sheath having a proximal end and a distal end and an outer sheath having a proximal end and a distal end, the outer sheath having a lumen for at least partially receiving the inner sheath, the distal end of the inner sheath extending past the distal end of the outer sheath;
a self-expanding intraluminal stent located over the distal end of the inner sheath, the stent having a proximal end attached to the distal end of the outer sheath and a distal end attached to the distal end of the inner sheath;
means for controllably rotating the inner sheath relative to the outer sheath and simultaneously controllably moving the inner sheath axially relative to the outer sheath.
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Abstract
Systems and methods for delivering a radially expandable stent for implantation within a body vessel that provide for the controlled radial expansion of the stent simultaneous with controlled axial movement of the ends of the stent, whereby controlled delivery of the stent can be accomplished. The device may include a screw rotated to simultaneously radially expand and axially compress a stent that has been previously wound onto a delivery device.
544 Citations
22 Claims
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1. A system for delivering a radially expandable stent for implantation within a body vessel, comprising:
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an elongated tubular member comprising an inner sheath having a proximal end and a distal end and an outer sheath having a proximal end and a distal end, the outer sheath having a lumen for at least partially receiving the inner sheath, the distal end of the inner sheath extending past the distal end of the outer sheath; a self-expanding intraluminal stent located over the distal end of the inner sheath, the stent having a proximal end attached to the distal end of the outer sheath and a distal end attached to the distal end of the inner sheath; means for controllably rotating the inner sheath relative to the outer sheath and simultaneously controllably moving the inner sheath axially relative to the outer sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for delivering a radially expandable stent for implantation within a body vessel, comprising:
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an elongated tubular member comprising an inner sheath having a proximal end and a distal end and an outer sheath having a proximal end and a distal end, the outer sheath having a lumen for at least partially receiving the inner sheath, the distal end of the inner sheath extending past the distal end of the outer sheath; a self-expanding intraluminal stent located over the distal end of the inner sheath, the stent having a proximal end attached to the distal end of the outer sheath and a distal end attached to the distal end of the inner sheath; a first handle operatively attached to the inner sheath, the first handle located at the proximal end of the inner sheath; a second handle operatively attached to the outer sheath, the second handle located at the proximal end of the outer sheath; and the first and second handles being operatively mounted on a screw such that rotation of one handle relative to the other handle results in controlled axial movement of the inner and outer sheaths relative to each other. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for controllably delivering a self-expandable stent comprising steps of:
providing a stent delivery device comprising; an elongated tubular member comprising an inner sheath having a proximal end and a distal end and an outer sheath having a proximal end and a distal end, the outer sheath having a lumen for at least partially receiving the inner sheath, the distal end of the inner sheath extending past the distal end of the outer sheath; a self-expanding intraluminal stent located over the distal end of the inner sheath, the stent having a proximal end retained against the distal end of the outer sheath and a distal end retained against the distal end of the inner sheath;
means for controllably rotating the inner sheath relative to the outer sheath and simultaneously controllably moving the inner sheath axially relative to the outer sheath;inserting the stent delivery device to locate the stent in a desired position within a body lumen; rotating the inner sheath and outer sheath relative to each other, whereby the stent is expanded radially; releasing one of the proximal and distal ends of the stent; and releasing the other of the proximal and distal ends of the stent. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method according to claim 21, wherein the stent delivery device further comprises a first release wire actuator operatively connected to the first release wire and mounted on the first handle and a second release wire actuator operatively connected to the second release wire and mounted on the second handle, wherein the steps of moving the first and second release wires axially are performed by operating the first and second release wire actuators.
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22. A method for controllably delivering a self-expandable stent comprising steps of:
providing a stent delivery device comprising; an elongated tubular member comprising an inner sheath having a proximal end and a distal end and an outer sheath having a proximal end and a distal end, the outer sheath having a lumen for at least partially receiving the inner sheath, the distal end of the inner sheath extending past the distal end of the outer sheath; a self-expanding intraluminal stent located over the distal end of the inner sheath, the stent having a proximal end retained against the distal end of the outer sheath and a distal end retained against the distal end of the inner sheath;
a first handle operatively attached to the inner sheath, the first handle located at the proximal end of the inner sheath;a second handle operatively attached to the outer sheath, the second handle located at the proximal end of the outer sheath; and the first and second handles being operatively mounted on a screw such that rotation of one handle relative to the other handle results in controlled axial movement of the inner and outer sheaths relative to each other; inserting the stent delivery device to locate the stent in a desired position within a body lumen; rotating the first and second handles relative to each other using the screw, whereby the stent is expanded radially releasing one of the proximal and distal ends of the stent; and releasing the other of the proximal and distal ends of the stent.
Specification