Devices and methods for controlling expandable prostheses during deployment
First Claim
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1. A catheter for delivering a prosthesis to a treatment site in a body lumen, the catheter comprising:
- a pusher tube having a proximal end and a distal end;
a sheath slidably disposed over the pusher tube;
one or more self-expanding tubular prostheses carried within the sheath which constrains the one or more self-expanding tubular prostheses in a radially contracted configuration, the one or more self-expanding tubular prostheses being independently releasable from the sheath as the sheath is retracted relative to the pusher tube, the one or more self-expanding tubular prostheses resiliently expand upon release from the sheath; and
a radially expandable control member comprising a plurality of elongate struts having a contracted shape and an expanded shape, wherein the radially expandable control member in the expanded shape extends from a first end within the sheath to a second end outside of the sheath to simultaneously engage opposing ends of an inner surface of a self-expanding tubular prostheses of the one or more self-expanding tubular prostheses during deployment, wherein the radially expandable control member exerts an outward force against the self-expanding tubular prothesis to inhibit the self-expanding tubular prosthesis from jumping distally upon expansion, and wherein the radially expandable control member moves axially in the expanded shape through the one or more self-expanding tubular prostheses as the sheath retracts relative to the pusher tube;
wherein the pusher tube is adapted to prevent proximal motion of the one or more tubular self-expanding prostheses as the sheath and radially expandable control member retract relative to the pusher tube.
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Abstract
Prosthesis delivery devices and methods are provided that enable precise control of prosthesis position during deployment. The catheter for delivering a prosthesis to a treatment site in a body lumen typically carries one or more self-expanding tubular prostheses within a sheath. A radially expandable control member is positionable within the prostheses and has an expanded shape which engages an inner surface of the prostheses to urge the prostheses outwardly against the sheath. The radially expandable control member therefore controls axial position of the prostheses during deployment. Thus one or more prostheses may be deployed at a treatment site precisely. When multiple prostheses are deployed, excessive spacing or overlap between adjacent prostheses is minimized. The prostheses of the present invention are often deployed in stenotic lesions in peripheral arteries as well as coronary arteries and other body lumens.
599 Citations
20 Claims
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1. A catheter for delivering a prosthesis to a treatment site in a body lumen, the catheter comprising:
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a pusher tube having a proximal end and a distal end; a sheath slidably disposed over the pusher tube; one or more self-expanding tubular prostheses carried within the sheath which constrains the one or more self-expanding tubular prostheses in a radially contracted configuration, the one or more self-expanding tubular prostheses being independently releasable from the sheath as the sheath is retracted relative to the pusher tube, the one or more self-expanding tubular prostheses resiliently expand upon release from the sheath; and a radially expandable control member comprising a plurality of elongate struts having a contracted shape and an expanded shape, wherein the radially expandable control member in the expanded shape extends from a first end within the sheath to a second end outside of the sheath to simultaneously engage opposing ends of an inner surface of a self-expanding tubular prostheses of the one or more self-expanding tubular prostheses during deployment, wherein the radially expandable control member exerts an outward force against the self-expanding tubular prothesis to inhibit the self-expanding tubular prosthesis from jumping distally upon expansion, and wherein the radially expandable control member moves axially in the expanded shape through the one or more self-expanding tubular prostheses as the sheath retracts relative to the pusher tube; wherein the pusher tube is adapted to prevent proximal motion of the one or more tubular self-expanding prostheses as the sheath and radially expandable control member retract relative to the pusher tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A catheter for delivering a prosthesis to a treatment site in a body lumen, the catheter comprising:
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a pusher tube having a proximal end and a distal end; a sheath slidably disposed over the pusher tube and having a distal tip; one or more self-expanding tubular prostheses carried within the sheath which constrains the one or more self-expanding tubular prostheses in a radially contracted configuration, the one or more self-expanding tubular prostheses being independently releasable from the sheath as the sheath is retracted relative to the pusher tube, the one or more self-expanding tubular prostheses resiliently expand upon release from the sheath; and a radially expandable control member having a contracted shape and an expanded shape, wherein the radially expandable control member in the expanded shape extends from a first end within the sheath to a second end outside of the sheath to simultaneously engage opposing ends of an inner surface of a self-expanding tubular prosthesis of the one or more self-expanding tubular prostheses during deployment, wherein the radially expandable control member exerts an outward force against the self-expanding tubular prosthesis to inhibit the self-expanding tubular prosthesis from jumping distally upon expansion, and wherein the radially expandable control member moves axially in the expanded shape through the one or more self-expanding tubular prostheses as the sheath retracts relative to the pusher tube; wherein the distal tip of the sheath is expandable as the one or more self-expanding prostheses expands, and wherein the distal tip of the sheath is interactive with the radially expandable control member to enable the self-expanding tubular prosthesis to be trapped therebetween to inhibit the self-expanding tubular prosthesis from jumping distally upon expansion, and wherein the pusher tube is adapted to prevent proximal motion of the one or more self-expanding tubular prostheses as the sheath and radially expandable control member retract relative to the pusher tube. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification
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Current AssigneeJW Medical Systems Ltd
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Original AssigneeJW Medical Systems Ltd
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InventorsSnow, David W., Davila, Dawn M., Lin, Stuart, Robinson, Timothy W.
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Primary Examiner(s)Rodjom, Katherine
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Application NumberUS13/684,006Publication NumberTime in Patent Office1,693 DaysField of Search623 111, 623 112, 623 123, 606108, 606194US Class CurrentCPC Class CodesA61F 2/95 Instruments specially adapt...A61F 2/9517 handle assemblies thereforA61F 2/958 Inflatable balloons for pla...A61F 2/966 with relative longitudinal ...A61F 2/97 the outer sleeve being spli...A61F 2002/826 more than one stent being a...A61F 2002/9505 having retaining means othe...A61F 2002/9665 with additional retaining m...
