Selectively expandable, retractable and removable stent
First Claim
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1. Stent apparatus comprising:
- a. a resilient member disposed in a generally tubular, coiled manner about a transverse axis, having a minimum diameter when in a relaxed coiled position and being selectively expandable to one or more increasingly greater diameters;
b. said member having a first side and a second side; and
,c. movable latch device on said first side that is movable relates to the resilient member and a detent device on said second side, such that expansion of said resilient member from said relaxed coiled position causes said detent device and said movable latch device to make contact to hold said member in an expanded position, and movement of said latch device causes release of the detent device.
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Abstract
An improved stent apparatus for intraluminal use in the body of an animal. The apparatus is of resilient material disposed in a tubular configuration about a central axis, which carries ratchet apparatus in the form of catch and latch apparatus having a selectively removable latch. The stent is expanded through the use of an angioplasty balloon to any selected one of a plurality of dilated positions. As the stent expands, the catches come into contact with the latch to prevent retraction of the stent apparatus. The latch communicates with a point external to the lumen, and is selectively removable from contact with the catches to enable the stent apparatus to return to its original diameter.
233 Citations
18 Claims
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1. Stent apparatus comprising:
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a. a resilient member disposed in a generally tubular, coiled manner about a transverse axis, having a minimum diameter when in a relaxed coiled position and being selectively expandable to one or more increasingly greater diameters; b. said member having a first side and a second side; and
,c. movable latch device on said first side that is movable relates to the resilient member and a detent device on said second side, such that expansion of said resilient member from said relaxed coiled position causes said detent device and said movable latch device to make contact to hold said member in an expanded position, and movement of said latch device causes release of the detent device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification