Eversion resistant sleeves
First Claim
1. A device for implanting within a lumen having a longitudinal axis, the sleeve comprising:
- an anchor adapted for attachment with the lumen;
a sleeve coupled to a distal end of the anchor and adapted for extension within a gastrointestinal tract, the sleeve including;
a crumple zone coupled to the distal end of the anchor and having walls of the sleeve adapted to collapse concentrically upon themselves in the presence of retrograde pressure;
a reinforced zone coupled to a distal end of the crumple zone, the reinforced zone having walls stiffer than the walls of the crumple zone; and
a thin-walled zone extending from a distal end of the reinforced zone to a distal end of the device, the thin-walled zone being prone to eversion in the presence of retrograde pressure.
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Accused Products
Abstract
The invention relates to improved means for preventing eversion and subsequent obstruction of thin-walled, floppy gastrointestinal liners implanted in the digestive tract of an animal. The implantable devices include an anchor adapted for attachment within a natural body lumen and a thin-walled, floppy sleeve open at both ends and defining a lumen therebetween. A substantial length of the sleeve has material characteristics that result in the sleeve being prone to eversion in the presence of retrograde pressures. Exemplary eversion-resistant features provide an increased stiffness and/or an increased friction coefficient between the anchor and the proximal end of the sleeve to resist eversion. In some embodiments, the eversion-resistant feature includes an anti-buckling element, such as a wire coupled along the substantial length of the sleeve.
388 Citations
19 Claims
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1. A device for implanting within a lumen having a longitudinal axis, the sleeve comprising:
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an anchor adapted for attachment with the lumen; a sleeve coupled to a distal end of the anchor and adapted for extension within a gastrointestinal tract, the sleeve including; a crumple zone coupled to the distal end of the anchor and having walls of the sleeve adapted to collapse concentrically upon themselves in the presence of retrograde pressure; a reinforced zone coupled to a distal end of the crumple zone, the reinforced zone having walls stiffer than the walls of the crumple zone; and a thin-walled zone extending from a distal end of the reinforced zone to a distal end of the device, the thin-walled zone being prone to eversion in the presence of retrograde pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device for implanting within an animal body comprising:
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an anchor adapted for attachment within a gastrointestinal tract; a sleeve coupled to a distal end of the anchor and adapted for extension within the gastrointestinal tract, the sleeve including; an eversion-resistant feature coupled to a distal end of the anchor, the eversion-resistant feature being a taper of the sleeve from a first diameter at a proximal opening to a second diameter at a distal opening, the first diameter being larger than the second diameter, at least part of the eversion-resistant feature being configured to collapse concentrically upon itself in the presence of retrograde pressure; and a thin-walled zone coupled to the distal opening of the eversion-resistant feature, the thin-walled zone being adapted for extension into the gastrointestinal tract and prone to eversion in the presence of retrograde pressure. - View Dependent Claims (13, 14)
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15. A device for implanting within a lumen having a longitudinal axis, the sleeve comprising:
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an anchor adapted for attachment within a gastrointestinal tract; and a sleeve adapted for extension into the gastrointestinal tract, the sleeve comprising; a thin-walled zone configured to be deployed within a gastrointestinal tract, the thin-walled zone being prone to eversion in the presence of retrograde pressure; and a tapered segment of the sleeve disposed between a proximal end of the thin-walled zone and a distal end of the anchor, the tapered segment of the sleeve collapsing concentrically upon itself in the presence of retrograde pressure. - View Dependent Claims (16, 17, 18, 19)
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Specification