Controlled deployable medical device and method of making the same
First Claim
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1. An apparatus, comprising:
- a catheter having a proximal end portion and a distal end portion;
a tubular stent graft arranged on the proximal end portion of the catheter, the stent graft having an inner surface and an outer surface;
a movable element having a first end and a second end; and
a torsional member rotatably coupled to the catheter, the movable element forming a loop that extends circumferentially about and entirely externally of at least a portion of the stent graft and extending through the torsional member such that the first and second ends extend from opposing sides of the stent graft before extending through the torsional member and exiting a distal end thereof, wherein rotation of the torsional member in a first direction tightens the loop and thereby radially compresses at least a portion of the stent graft, and wherein rotation of the torsional member in an opposite second direction loosens the loop and thereby allows radial expansion of the portion of the stent graft, both the movable element and torsional member being separable from the stent graft to allow withdrawal of both the movable element and torsional member with the catheter from the stent graft.
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Abstract
Controlled deployable medical devices that are retained inside a body passage and in one particular application to vascular devices used in repairing arterial dilations, e.g., aneurysms. Such devices can be adjusted during deployment, thereby allowing at least one of a longitudinal or radial re-positioning, resulting in precise alignment of the device to an implant target site.
94 Citations
18 Claims
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1. An apparatus, comprising:
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a catheter having a proximal end portion and a distal end portion; a tubular stent graft arranged on the proximal end portion of the catheter, the stent graft having an inner surface and an outer surface; a movable element having a first end and a second end; and a torsional member rotatably coupled to the catheter, the movable element forming a loop that extends circumferentially about and entirely externally of at least a portion of the stent graft and extending through the torsional member such that the first and second ends extend from opposing sides of the stent graft before extending through the torsional member and exiting a distal end thereof, wherein rotation of the torsional member in a first direction tightens the loop and thereby radially compresses at least a portion of the stent graft, and wherein rotation of the torsional member in an opposite second direction loosens the loop and thereby allows radial expansion of the portion of the stent graft, both the movable element and torsional member being separable from the stent graft to allow withdrawal of both the movable element and torsional member with the catheter from the stent graft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus, comprising:
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a catheter having a proximal end portion and a distal end portion; a tubular stent graft arranged along the proximal end portion of the catheter; a movable element forming a loop that extends circumferentially about and entirely externally of a portion of the stent graft; a torsional member extending along an exterior of the stent graft, the torsional member being rotatable relative to the stent graft in a first direction to tighten the loop and radially compress the portion of the stent graft about which it is looped and in an opposite second direction to loosen the loop to allow radial expansion of the portion of the stent graft about which it is looped; and a releasable constraining sheath that extends along the stent graft and the torsional member and constrains the stent graft in a compacted delivery state.
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Specification