Endoscopic open wire snare system

1 . A product comprising an open loop polypectomy snare comprising:

a) a handle;

b) a tubular sheath having proximal and distal ends, said distal end defining a longitudinal axis;

c) a snare wire having a first end and a second end extending from a cavity of the tubular sheath and relatively movable with respect to the tubular sheath, wherein the first end is attached to the handle,

d) at least two snare hemi-loops attached to the second end of the snare wire,

wherein said at least two snare hemi-loops are configured to advance and recede inside the tubular sheath such that said at least two snare hemi-loops are configured to be in a contracted state inside the tubular sheath,

when said at least two snare hemi-loops advance from the tubular sheath, they are configured to expand to encircle a matter of choice and join at their distal ends at a joint to form a closed loop configuration to resect the matter of choice; and

when said at least two snare hemi-loops retract into the tubular sheath, they are configured to separate at their distal ends to open the closed loop configuration, and the at least two snare hemi-loops contract from its expanded state to the contracted state;

wherein movement of said at least two snare hemi-loops from the tubular sheath and/or opening and closing of said at least two snare hemi-loops are controlled by the handle;

wherein the open loop polypectomy snare is configured to remove the matter of choice in an endoscopic resection;

wherein a portion of the snare wire and at least one of the hemi-loops of said at least two snare hemi-loops comprise an electrically conductive material that on a supply of a cautery current is configured to cut the matter of choice electrically; and

wherein said handle comprises a feature configured to supplying the cautery current to the electrically conductive material.

2 . The product of claim 1 , wherein said at least two snare hemi-loops comprise a first hemi-loop and a second hemi-loop, wherein the first hemi-loop and the second hemi-loop are made of the same material.

3 . The product of claim 1 , wherein said at least two snare hemi-loops comprise a first hemi-loop and a second hemi-loop, wherein the first hemi-loop and the second hemi-loop are made of different material.

4 . The product of claim 3 , wherein the first hemi-loop is more rigid relative to the second hemi-loop.

5 . The product of claim 1 , wherein the joint of said at least two snare hemi-loops comprises a hinge joint, a magnet, an electromagnet joint or a combination thereof.

6 . The product of claim 1 , wherein the matter of choice comprises a lesion, a polyp or a foreign body or a combination thereof.

7 . The product of claim 1 , wherein said snare is a cold snare polypectomy or a hot snare polypectomy.

8 . The product of claim 6 , wherein a size of the polyp is in a range of about 1 mm to about 50 mm.

9 . The product of claim 1 , wherein a width of the snare wire is about 0.1 mm to 1 mm.

10 . The product of claim 2 , wherein a width of both the hemi-loops is same.

11 . The product of claim 2 , wherein a width of both the hemi-loops is different.

12 . The product of claim 1 , wherein a size of the closed loop formed by the at least two snare hemi-loops is in a range of about 1 mm to about 50 mm.

13 . The product of claim 1 , wherein a shape of at least one of the hemi-loops of said at least two snare hemi-loops depends on anatomy of the matter of the choice to be resected.

14 . The product of claim 1 , wherein at least one of the hemi-loops of said at least two snare hemi-loops comprises a monofilament or a braided wire.

15 . The product of claim 1 , wherein the handle comprises a knob configured to open and close the at least two snare hemi-loops either simultaneously or independently to achieve different configurations.

16 . The product of claim 1 , wherein the tubular sheath comprises an insulating material.

17 . The product of claim 16 , wherein the insulating material comprises plastic.

18 . The product of claim 1 , wherein at least one of the hemi-loops of said at least two snare hemi-loops comprises a memory material.

19 . A product comprising an open loop polypectomy snare comprising:

a) a handle;

b) a tubular sheath having proximal and distal ends, said distal end defining a longitudinal axis;

c) a snare wire having a first end and a second end extending from a cavity of the tubular sheath and relatively movable with respect to the tubular sheath, wherein the first end is attached to the handle,

d) at least two snare hemi-loops attached to the second end of the snare wire,

wherein said at least two snare hemi-loops are configured to advance and recede inside the tubular sheath such that said at least two snare hemi-loops are configured to be in a contracted state inside the tubular sheath,

when said at least two snare hemi-loops advance from the tubular sheath, they are configured to expand to encircle a matter of choice and join at their distal ends at a joint to form a closed loop configuration to resect the matter of choice; and

when said at least two snare hemi-loops retract into the tubular sheath, they are configured to separate at their distal ends to open the closed loop configuration and the at least two snare hemi-loops contract from its expanded state to the contracted state;

wherein movement of said at least two snare hemi-loops from the tubular sheath and/or opening and closing of said at least two snare hemi-loops are controlled by the handle; and

wherein the open loop polypectomy snare is configured to remove the matter of choice in an endoscopic resection.

20 . The product of claim 19 , wherein the snare wire and at least one of the hemi-loops of said at least two snare hemi-loops are retractable into the tubular sheath and configured to apply mechanical force to resect the matter of choice mechanically.