Pyloric valve obstructing devices and methods
First Claim
1. A device for obstructing a pyloric valve of a stomach, the device comprising:
- an expandable support portion adapted to reconfigure in the stomach from a first configuration to a larger second configuration, wherein the support portion in the second configuration is sized to prevent passage of the device through the pyloric valve;
a compliant tissue engagement surface comprising a compliant outer shell which is formed external to the expandable support portion when in the larger second configuration such that the surface surrounds an inner plug within a hollow portion formed within the support portion and wherein the surface is adapted to be intermittently engaged to stomach tissue adjacent the pyloric valve whereby the pyloric valve is intermittently obstructed;
a tubular positioning member having a length extending from the tissue engagement surface and having a shape adapted to pass at least partially through the pyloric valve to position the device over the pyloric valve, where the outer shell is movable from a first configuration in which it overlaps at least part of the positioning member to a second configuration in which it overlaps at least part of the plug; and
a retaining member having a diameter larger than the positioning member and coupled with a distal end of the positioning member for maintaining the device in intermittent contact with the pyloric valve, where the retaining member has an atraumatic shape.
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0 Petitions
Accused Products
Abstract
Methods, devices and systems facilitate intermittent and/or partial obstruction of a pyloric valve. Devices generally include a support portion for preventing the device from passing through the pyloric valve and a tissue engagement portion for contacting tissue adjacent the pyloric valve to obstruct the valve. Some embodiments also include a positioning member extending from the tissue engagement portion for helping position the device for obstructing the valve. A retaining member may optionally be included on the distal end of the positioning member for further maintaining a position of the device in the stomach. Some embodiments are deliverable into the stomach through the esophagus, either by swallowing or through a delivery tube or catheter. Some embodiments are fully reversible. Some embodiments self-expand within the stomach, while others are inflated or otherwise expanded.
180 Citations
44 Claims
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1. A device for obstructing a pyloric valve of a stomach, the device comprising:
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an expandable support portion adapted to reconfigure in the stomach from a first configuration to a larger second configuration, wherein the support portion in the second configuration is sized to prevent passage of the device through the pyloric valve; a compliant tissue engagement surface comprising a compliant outer shell which is formed external to the expandable support portion when in the larger second configuration such that the surface surrounds an inner plug within a hollow portion formed within the support portion and wherein the surface is adapted to be intermittently engaged to stomach tissue adjacent the pyloric valve whereby the pyloric valve is intermittently obstructed; a tubular positioning member having a length extending from the tissue engagement surface and having a shape adapted to pass at least partially through the pyloric valve to position the device over the pyloric valve, where the outer shell is movable from a first configuration in which it overlaps at least part of the positioning member to a second configuration in which it overlaps at least part of the plug; and a retaining member having a diameter larger than the positioning member and coupled with a distal end of the positioning member for maintaining the device in intermittent contact with the pyloric valve, where the retaining member has an atraumatic shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A device for obstructing a pyloric valve of a stomach, the device comprising:
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an obstructing member adapted to reconfigure in the stomach from a first configuration to a larger second configuration which is sized to prevent passage of the device through the pyloric valve, wherein the obstructing member presents a surface comprising a compliant outer shell when in the larger second configuration which surrounds an inner plug within a hollow portion formed within the obstructing member and which intermittently engages stomach tissue adjacent the pyloric valve whereby the pyloric valve is intermittently obstructed; a tubular positioning member having a length extending from the obstructing member, the positioning member having a shape adapted to pass at least partially through the pyloric valve to position the obstructing member over the pyloric valve, where the outer shell is movable from a first configuration in which it overlaps at least part of the positioning member to a second configuration in which it overlaps at least part of the plug; and
,a retaining member having a diameter larger than the positioning member and coupled with a distal end of the positioning member for maintaining the device in intermittent contact with the pyloric valve, where the retaining member has an atraumatic shape. - View Dependent Claims (32, 33, 34, 35, 36)
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37. A system for obstructing a pyloric valve of a stomach, the system comprising:
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a pyloric valve obstructing device comprising; an expandable support portion adapted to reconfigure in the stomach from a first configuration to a larger second configuration, wherein the support portion in the second configuration is sized to prevent passage of the device through the pyloric valve; a compliant tissue engagement surface comprising a compliant outer shell which is formed external to the expandable support portion when in the larger second configuration such that the surface surrounds an inner plug within a hollow portion formed within the support portion and wherein the surface is adapted to be intermittently engaged to stomach tissue adjacent the pyloric valve whereby the pyloric valve is intermittently obstructed; and
,a tubular retaining member having a length coupled to the tissue engagement surface where the retaining member has an atraumatic shape, where the outer shell is movable from a first configuration in which it overlaps at least part of the retaining member to a second configuration in which it overlaps at least part of the plug; and a delivery device attachable to a coupling feature along the obstructing device for delivering the pyloric valve obstructing device to the stomach through an esophagus. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44)
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Specification