Strain management in stent delivery system
First Claim
1. A percutaneous, transluminal system with a distal end for inserting into a body and a proximal end to remain outside the body, the system including:
- an inner catheter, comprising;
an inner tube,a wire coil disposed around at least a portion of the inner tube, having a distal region, an intermediate region and a proximal region, and including a closed-coil structure in the intermediate region and an open-coil structure in at least one of the distal region and the proximal region,an outer tube disposed around at least a portion of the wire coil, anda flow path for liquid from the proximal end through the distal end of the system, including a radially-extending portion through the open-coil structure;
an outer sheath disposed around at least a portion of the length of said inner catheter, the outer sheath being retractable in a proximal direction relative to the inner catheter; and
a self-expanding stent positioned around the inner tube wherein the self-expanding stent is maintained in a medical-device-receiving annulus inside the outer sheath near the distal end, the self-expanding stent being releasable by the retraction of the outer sheath in a proximal direction relative to the inner catheter;
whereinthe self-expanding stent is held within the outer sheath and is positioned distal of the distal end of the wire coil;
the self-expanding stent is maintained in a radially compressed first state by the outer sheath being disposed about at least a portion of the self-expanding stent;
during retraction of the outer sheath, the self-expanding stent is prevented by the wire coil from moving with the outer sheath in a proximal direction;
andwhen the outer sheath is retracted in a proximal direction relative to the inner catheter, the self-expanding stent is released for expansion to a radially less compressed second state.
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Accused Products
Abstract
A percutaneous, transluminal system with a distal end for inserting into a body and a proximal end to remain outside the body, and comprising: an inner catheter which runs the length of the system and has a distal end and a proximal end, the inner catheter itself comprising: an inner tube (102); a wire coil (110) disposed around at least a portion of the inner tube, having a distal end, a proximal end, a distal region (114), an intermediate region and a proximal region (112); and an outer tube (124), having a distal end and a proximal end, disposed around at least a portion of the wire coil reinforcing member, characterized by: the wire coil having a closed-coil structure in the intermediate region and an open-coil structure in at least one of the distal region and the proximal region; and by a flow path for liquid from the proximal to the distal end of the system which includes a radially-extending portion through said open coil structure.
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Citations
14 Claims
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1. A percutaneous, transluminal system with a distal end for inserting into a body and a proximal end to remain outside the body, the system including:
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an inner catheter, comprising; an inner tube, a wire coil disposed around at least a portion of the inner tube, having a distal region, an intermediate region and a proximal region, and including a closed-coil structure in the intermediate region and an open-coil structure in at least one of the distal region and the proximal region, an outer tube disposed around at least a portion of the wire coil, and a flow path for liquid from the proximal end through the distal end of the system, including a radially-extending portion through the open-coil structure; an outer sheath disposed around at least a portion of the length of said inner catheter, the outer sheath being retractable in a proximal direction relative to the inner catheter; and a self-expanding stent positioned around the inner tube wherein the self-expanding stent is maintained in a medical-device-receiving annulus inside the outer sheath near the distal end, the self-expanding stent being releasable by the retraction of the outer sheath in a proximal direction relative to the inner catheter; wherein the self-expanding stent is held within the outer sheath and is positioned distal of the distal end of the wire coil; the self-expanding stent is maintained in a radially compressed first state by the outer sheath being disposed about at least a portion of the self-expanding stent; during retraction of the outer sheath, the self-expanding stent is prevented by the wire coil from moving with the outer sheath in a proximal direction; and when the outer sheath is retracted in a proximal direction relative to the inner catheter, the self-expanding stent is released for expansion to a radially less compressed second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification