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US 2018/0021043 A1Published application
Magnetic Anastomosis Device and Delivery System
OwnerVirender K. Sharmainventor
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Abstract
An anastomosis device includes magnets coupled to a wire capable of changing shape from a straight wire into a coil when deployed within a body. The coil exerts compressive force upon layers of tissue caught between loops of the coil. The compressive force is enhanced by attractive forces between magnets coupled with adjacent loops of the coil and causes the coil to cut through the tissue layers, creating an anastomosis. One end of the wire is preferably provided with a connecting member, such as a screw or a nut, for connecting with a delivery device.
Claims30
A method of creating an anastomosis between two adjacent body tissues comprising:
- positioning an anastomosis device, via a catheter, within a body cavity proximate at least one of said adjacent body tissues, wherein the anastomosis device comprises:
- a wire, wherein said wire has a first state and a second state, wherein, in said first state, the wire has a substantially linear form, wherein, in said second state, the wire forms a coil having at least a first loop and a second loop, and wherein said wire comprises a shape memory alloy that is adapted to transform from the first state to the second state when exposed to a temperature greater than a threshold value;
- and
- a plurality of magnets positioned over said wire, wherein each of said plurality of magnets has a lumen through which said wire extends, wherein, in each of said first loop and second loop, a portion of adjacent magnets of said plurality of magnets are configured to not attach to each other, and wherein a portion of said plurality of magnets in the first loop are configured to attract a portion of said plurality of magnets in the second loop;
- using a tip of the wire, piercing the adjacent body tissues and positioning the anastomosis device through a hole created by said piercing;
- before releasing the anastomosis device, heating the wire by passing electrical current through the wire, thereby causing the wire to transform from the first state to the second state;
- and
- releasing the anastomosis device such that, as it transforms from the first state to the second state, tissue between the two adjacent body tissues is caught between the first loop and the second loop, thereby being compressed and resulting in the anastomosis.
5 more elements
(canceled)
(canceled)
A method of creating an anastomosis between two adjacent body tissues comprising:
- positioning an anastomosis device within a body cavity proximate at least one of said adjacent body tissues, wherein the anastomosis device comprises:
- a wire comprising a shape memory alloy, wherein said wire has a martensite state and an austenite state, wherein, in said martensite state, the wire has a substantially linear form, wherein, in said austenite state, the wire forms a coil having at least a first loop and a second loop, and wherein said wire is adapted to transform from the martensite state to the austenite state when exposed to a temperature greater than 20 degrees Celsius;
- and
- a plurality of magnets positioned over said wire, wherein each of said plurality of magnets has a lumen through which said wire extends, wherein, in each of said first loop and second loop, a portion of adjacent magnets of said plurality of magnets are configured to not attach to each other, and wherein a portion of said plurality of magnets in the first loop are configured to attract a portion of said plurality of magnets in the second loop;
- and
- using a tip of the wire, piercing the adjacent body tissues and positioning the anastomosis device through a hole created by said piercing;
- before releasing the anastomosis device, heating the wire by passing electrical current through the wire, thereby causing the wire to transform from the martensite state to the austenite state;
- and
- releasing the anastomosis device such that, as it transforms from the martensite state to the austenite state, tissue between the two adjacent body tissues is caught between the first loop and the second loop, thereby being compressed with a pressure of at least 1 psi and resulting in an anastomosis.
6 more elements
Dependencies are inferred from the claim text.