Self-expanding stent delivery system
First Claim
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1. A catheter assembly comprising:
- an elongated catheter having a proximal end and a distal end;
the catheter having an inner member and an outer member extending along a longitudinal axis, the inner member and the outer member having a coaxial configuration and dimensioned for relative axial movement;
means for providing relative axial movement between the inner member and the outer member;
a self-expanding stent having an open lattice structure configured to be biased from a delivery configuration having a reduced cross section and a predetermined length to an open configuration with an enlarged cross section and being positioned within a distal end of the outer member in the delivery configuration; and
a plurality of attachment projections at a distal end of the inner member spaced along the stent a distance at least as great as the predetermined length for facilitating the removable attachment of the stent to the inner member distal end.
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Abstract
A stent-delivery catheter system delivers and implants a self-expanding stent intraluminally into a human patient'"'"'s body lumen. A self-expanding stent is removabaly attached to the distal end of an inner member so that attachment projections prevent axial movement of the stent on the inner member while the stent is being delivered and implanted in a patient'"'"'s body lumen.
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Citations
13 Claims
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1. A catheter assembly comprising:
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an elongated catheter having a proximal end and a distal end; the catheter having an inner member and an outer member extending along a longitudinal axis, the inner member and the outer member having a coaxial configuration and dimensioned for relative axial movement; means for providing relative axial movement between the inner member and the outer member; a self-expanding stent having an open lattice structure configured to be biased from a delivery configuration having a reduced cross section and a predetermined length to an open configuration with an enlarged cross section and being positioned within a distal end of the outer member in the delivery configuration; and a plurality of attachment projections at a distal end of the inner member spaced along the stent a distance at least as great as the predetermined length for facilitating the removable attachment of the stent to the inner member distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of mounting an intravascular stent on a delivery catheter, the method comprising:
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providing a delivery catheter having an elongated catheter body and a proximal end and a distal end, the catheter having an inner member and an outer member extending along a longitudinal axis, the inner member and the outer member having a coaxial configuration and dimensioned for relative axial movement, and control handles for providing relative axial movement between the inner member and the outer member; positioning a self-expanding stent in a delivery configuration having an open lattice structure a reduced cross section and a predetermined length within an inner lumen of the outer member; manipulating the control handles to slide the inner member distal end within an inner lumen of the self-expanding stent; and heating the inner member distal end so that it conforms and fills the open lattice structure of the self-expanding stent with a plurality of attachment projections spaced along the stent a distance at least as great as the predetermined length thereby removably attaching the self-expanding stent to the inner member distal end.
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10. A method of implanting a self-expanding stent in a body lumen, the method comprising:
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providing an elongated catheter having a proximal end and a distal end, the catheter having an inner member and an outer member extending along a longitudinal axis, the inner member and the outer member having a coaxial configuration and dimensioned for relative axial movement, the inner member distal end encircled by a self-expanding stent in a delivery configuration having a reduced cross section and a predetermined length, the inner member capable of being heated whereby it conforms and fills an open lattice structure of the self-expanding stent with a plurality of attachment projections, the projections spaced along the stent a distance at least as great as the predetermined length, control handles for providing relative axial movement between the inner member and the outer member, and the distal end of the outer member forming a sheath around the self-expanding stent; manipulating the control handles to simultaneously move the inner member axially in a distal direction and the outer member axially in a proximal direction; deploying the stent by permitting it to self-expand radially outwardly into contact with the body lumen while preventing axial movement of the stent on the catheter by a plurality of the attachment projections; and withdrawing the catheter from the body lumen. - View Dependent Claims (11)
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12. A method of implanting a self-expanding stent in a body lumen, the method comprising:
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providing an elongated catheter having a proximal end and a distal end, the catheter having an inner member and an outer member extending along a longitudinal axis, the inner member and the outer member having a coaxial configuration and dimensioned for relative axial movement, the inner member distal end encircled by a self-expanding stent in a delivery configuration having an open lattice structure, a reduced cross section and a predetermined length, the inner member capable of being heated whereby it conforms and fills the open lattice structure of the self-expanding stent with a plurality of attachment projections, the projections spaced along the stent a distance at least as great as the predetermined length, control handles for providing relative axial movement between the inner member and the outer member, the distal end of the outer member forming a sheath around the self-expanding stent; manipulating the control handles to move the outer member axially in a proximal direction while maintaining the inner member stationary; deploying the stent by permitting it to self-expand radially outwardly into contact with the body lumen; and withdrawing the catheter from the body lumen. - View Dependent Claims (13)
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Specification