ANASTOMOTIC DEVICE PROMOTING TISSUE NECROSIS
First Claim
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1. An anastomosis device, comprising:
- a body formed from a woven shape-memory wire and defining a central lumen, the body being configurable between an expanded position in which the body assumes a generally tubular configuration having a wire mesh wall adapted for insertion into a lumen of an anastomotic site and a rest position in which the body assumes an annular configuration having a plurality of petals with petal tips that define an outer periphery, the rest position being effective to hold opposed tissues of the anastomotic site in apposition and to apply a pressure to the opposed tissues such that the pressure decreases from an outer periphery to an inner periphery of the device.
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Abstract
Embodiments of the present invention generally provide an anastomosis device that can be used to couple two or more layers of tissue in apposition. In an exemplary embodiment, the device can be formed from one or more woven wires that can be configured to have a generally tubular shape in a first, expanded position for insertion to an anastomosis site and a generally annular, ring-shape in a second, resting position for securing tissue in apposition at the anastomosis site. The device can be adapted either to cause necrosis of the tissue layers around an outer periphery of the device or to promote growth of tissue about an inner periphery of the device.
128 Citations
22 Claims
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1. An anastomosis device, comprising:
a body formed from a woven shape-memory wire and defining a central lumen, the body being configurable between an expanded position in which the body assumes a generally tubular configuration having a wire mesh wall adapted for insertion into a lumen of an anastomotic site and a rest position in which the body assumes an annular configuration having a plurality of petals with petal tips that define an outer periphery, the rest position being effective to hold opposed tissues of the anastomotic site in apposition and to apply a pressure to the opposed tissues such that the pressure decreases from an outer periphery to an inner periphery of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An anastomosis device, comprising:
a body formed from a woven shape-memory wire and defining a central lumen, the body being configurable between an expanded position in which the body assumes a generally tubular configuration having a wire mesh wall adapted for insertion into a lumen of an anastomotic site and a rest position in which the body assumes an annular configuration having a plurality of petals with petal tips that define an outer periphery, the rest position being effective to hold opposed tissues of the anastomotic site in apposition and to allow the petal tips to contact the opposed tissues along a distance greater than approximately 5% of the outer periphery of the device. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An anastomosis device, comprising:
a body formed from a woven shape-memory wire and defining a central lumen, the body being configurable between an expanded position in which the body assumes a generally tubular configuration having a wire mesh wall adapted for insertion into a lumen of an anastomotic site and a rest position in which the body assumes an annular configuration with an inner periphery and having a plurality of petals with petal tips that define an outer periphery, the inner periphery being configured to allow tissue overgrowth of the device at the inner periphery. - View Dependent Claims (20, 21)
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22. A method for anastomosing tissue layers, comprising:
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delivering an anastomosis device formed from a woven shape-memory wire having a wire mesh wall defining a central lumen and configured in an expanded, tubular position through a lumen defined by two opposed tissues; and
deploying the anastomosis device to hold the opposed tissues in apposition such that, upon deployment, the device assumes an annular configuration having a plurality of petals with petal tips that define an outer periphery, the device applying a pressure to the opposed tissues such that the pressure decreases from the outer periphery to an inner periphery of the device.
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Specification