KR101958720B1 - Medical snare device - Google Patents

Abstract

The present invention relates to a medical snare unit. The medical snare unit includes: a tubular body; a sliding unit which is movably formed in the longitudinal direction of the body; a conductive unit which can move with the sliding unit along the sliding unit and includes an extension unit arranged in the longitudinal direction of the body in the body while having a contact ball formed on the back end, a lasso unit formed on the front end of the extension unit, a contact shell having an inlet expanding while surrounding the contact ball, and a conductive unit fixed to the sliding unit while having an end protruding to the outside of the body and the other end having a contact hole for having the contact ball surrounded by the contact shell inserted therein; a rotation handle which is coupled from the front end of the body with respect to a shaft formed in the longitudinal direction of the body in a rotatable manner for rotating the extension unit; and a protection tube which is coupled to the front end of the rotation handle and is formed in the longitudinal direction of the body. Accordingly, the medical snare unit can be used reliably and easily.

Description

Medical snare device

The present invention relates to a medical snare, and more particularly, to a medical snare that is stable and easy to use.

Punch forceps or snares can be used to perform colonoscopic polypectomy.

The snare is composed of a tubular body, a wire formed with a snare on the tip thereof, and a wire arranged so that the snare protrudes from the body or is inserted into the body. The tip of the snare is inserted into the large intestine of a human, The polyp can be removed by flowing electricity through the wire. The rear end of the wire is connected to the external power source through the electrode portion at the rear end side of the snare body.

However, depending on the position of the polyp in the large intestine, it may be difficult to wrap the polyp directly with the snare snare. For this reason, the wire is formed to be rotatable within the body. Therefore, the electrode portion and the wire connected to the external power source must be formed to be relatively rotatable.

That is, the electrode portion and the wire connected to the external power source must be formed separately so that they can rotate relative to each other. Since electricity can be supplied from the electrode portion to the tip portion of the wire, It is necessary to take measures to make it possible.

KR 10-2012-0086233 A KR 10-2017-0085630 A

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a medical snare capable of stably supplying electricity to a snare part contacting with a polyp during colonoscopic polypectomy.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems that are not mentioned can be clearly understood by those skilled in the art from the following description.

This object is achieved according to the invention by a tubular body; A sliding part formed to be movable along a longitudinal direction of the body; An extension extending along the longitudinal direction of the body in the body and formed with a contact ball at a rear end thereof, a noose formed at the tip of the extension, an extended mouth enclosing the contact ball, And a contact portion having a contact hole for receiving a contact ball inserted into the contact shell, the contact portion being protruded outward from the body at one end and fixed to the sliding portion; A rotation handle rotatably coupled to an end of the body with respect to an axis formed in the longitudinal direction of the body to rotate the extension; And a protective tube coupled to a distal end of the rotation handle and formed along the longitudinal direction of the body.

It is preferable that the conductive portion further includes a cap for opening and closing the contact hole inlet of the electrode portion.

The cap is preferably screwed to the electrode.

The auxiliary handle is rotatably coupled to a rear end of the body with respect to an axis formed in the longitudinal direction of the body.

And a second protective tube made of Teflon material is disposed inside the protective tube.

Wherein the rotation handle includes a first shaft hole having a rear end coupled to the body and having a first passage hole passing through the center of the body, the first shaft hole being spaced apart from the first shaft shoe toward the protection tube, And a second axial hole formed at a center thereof and having a second through hole through which the extension extends, the second axial hole being disposed parallel to the first through hole and the second through hole, And a connecting portion connecting the first shrink-grip portion and the second shrink-grip portion, the second shrink-grip portion being rotatable about the first shrink grip portion and the second shrink grip portion and having a cross- And a handle portion in which a sliding hole is formed.

The protection tube may be configured to rotate with the rotation handle.

Wherein the protection tube has a reduced diameter portion at its rear end and the protective tube has a reduced diameter portion at its distal end portion and is connected to the distal end of the rotation handle in a state where the enlarged diameter portion is caught in the reduced diameter portion, Can be coupled to the distal end.

The medical snare according to the present invention can reliably maintain the electrical contact state between the members of the conductive portion, thereby stably operating the medical snare.

Further, the medical snare according to the present invention is easy to assemble.

When the medical snare according to the present invention further includes the auxiliary handle, it is possible to use the medical snare more easily.

1 is a perspective view of a medical snare according to the present invention,
2 is an exploded perspective view of a medical snare according to the present invention,
3 is a sectional view of a medical snare according to the present invention,
4 is an explanatory diagram of a conductive portion of a medical snare according to the present invention,
5 is an explanatory view of a rotation handle of a medical snare according to the present invention,
FIG. 6 is an explanatory view of still another embodiment of a rotation handle of a medical snare according to the present invention;
7 is an explanatory view of a connecting nut of a medical snare according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a medical snare 1 according to the present invention. FIG. 3 is an exploded perspective view of the medical snare 1 according to the present invention. 1 is shown.

The medical snare 1 according to the present invention mainly comprises a body 10, a sliding portion 20, a conductive portion 30, a rotation handle 40, and a protective tube 50.

The body 10 is a tubular body which is a main structural body of the medical snare according to the present invention. The cross-sectional shape of the body 10 may be formed by a circle, an ellipse, a chamfered rectangle, or the like.

The sliding portion 20 is formed to be movable along the longitudinal direction of the body 10. A through hole 21 having a cross section shaped to engage with an end surface of the body 10 is formed at the center of the sliding portion 20 so that the sliding portion 20 is inserted into the through hole 10, In the longitudinal direction. The sliding portion 20 can be moved along the longitudinal direction of the body 10 by the practitioner when the medical snare according to the present invention is used and the sliding portion 20 is provided with a finger Two holes 22 are formed so that they can be inserted.

The conductive portion 30 is disposed in the body 10 along the longitudinal direction of the body 10 and most of the conductive portion 30 is connected to the sliding portion 20 so that the sliding portion 20 extends in the longitudinal direction of the body 10 The sliding part 20 moves together with the sliding part 20. Electricity can flow through the conductive portion 30, and the polyp can be cut off by electrocautery.

More specifically, the conductive portion 30 includes the extension portion 31, the noose 32, the contact shell 33, and the electrode portion 34. All the configuration of the conductive portion 30 can move together with the sliding portion 20 and the extension portion 31 and the snare 32 can rotate with respect to the axis formed in the longitudinal direction of the body 10. [ The structures of the conductive portion 30 are made of a metal material so that electricity can flow.

The extension portion 31 extends in the body 10 along the longitudinal direction of the body 10 and has a spherical contact ball 31a at its rear end. The snare 32 is formed in a circular shape continuous with the extended portion 31 at the tip of the extended portion 31. The snare 32 is positioned inside the medical snare by the movement of the sliding portion 20 or protrudes to the outside. When the snare 32 is located inside the medical snare, it is folded in a straight line and when the snare 32 is protruded to the outside of the medical snare, Lt; / RTI >

The contact shell 33 is disposed so as to surround the contact ball 31a of the extension 31. The contact shell 33 has a spherical shape as a whole and an inlet 33a is formed in a part thereof to form a contact ball 33 31a can be inserted. A through hole 33b connected to the inlet 33a and having a width slightly larger than the diameter of the outer portion of the contact ball 31a of the extension 31 is formed on the wall surface of the contact shell 33, And the contact shell 33 can be prevented from interfering with each other. The contact ball 31a is rotatable in the contact shell 33 with the axial direction of the extending portion 31 as a rotational axis. The contact shell 33 also has an extension 33d. The extension portion 33d is formed to extend from the inlet 33a to the outside of the contact shell 33 and increase in diameter toward the outside of the contact shell 33. [

The electrode unit 34 is formed to be perpendicular to the longitudinal direction of the body 10 and is fixed to the sliding unit 20 so that the conductive unit 30 is fixed to the sliding unit 20 So that it can be moved. One end portion of the electrode portion 34 protrudes to the outside of the body 10 to be connected to an external power source and a contact hole 34a is formed at the other end portion. The contact hole 34a is a space extending from the other end surface of the electrode portion 34 in the longitudinal direction of the electrode portion 34. [

The contact ball 31a of the extension portion 31 is inserted into the contact hole 34a of the electrode portion 34 while being surrounded by the contact shell 33 as shown in Fig. The diameter of the contact hole 34a is formed to be larger than the diameter of the body portion of the contact shell 33 and smaller than the diameter of the end portion of the extension portion 33d extending from the inlet 33a of the contact shell 33. [ The extension portion 33d of the contact shell 33 is pressed by the inner surface of the contact hole 34a and the contact ball 31a is pressed by the inner surface of the contact shell 33, 31a, the contact shell 33 and the electrode portion 34 are kept in contact with each other, even if the contact ball 31a rotates relative to the contact shell 33 and the electrode portion 34, Can be reliably maintained.

A slit 33c is formed from the extended portion 33d to the body portion of the contact shell 33 so that the contact shell 33 is flexible when the extended portion 33d is pressed by the inner surface of the contact hole 34a To be deformed.

A hole 34b for communicating the inner space of the contact hole 34a with the outer space is formed in the wall surface of the contact hole 34a so that the portion of the extended portion 31 other than the contact ball 31a and the portion of the contact hole 34a Ensure that the wall does not interfere. 4, the contact hole 34a may extend along the longitudinal direction of the electrode portion 34, but may extend along the direction orthogonal to the longitudinal direction of the electrode portion 34 Do.

The rotation handle 40 rotatably engages with the axis of the body 10 in the longitudinal direction of the body 10 at the tip of the body 10. A through hole is formed at the center of the rotation handle 40 so as to locate the extension 31. When the rotation handle 40 is rotated, the extension 31 is rotated together. The extension portion 31 has a shape that is not circular in cross section at least in a section of the extension portion 31 so that the extension portion 31 is slid with respect to the rotation handle 40 and can rotate together with the rotation handle 40, May have a cross-sectional shape that engages with the end surface of the extension portion 31. [

The rotation handle 40 is rotated by the operator when the medical snare is used and the outer surface of the rotation handle 40 may be provided with concavities and convexities to prevent the hands of the operator from slipping on the outer surface of the rotation handle 40 have.

The protection tube 50 is coupled to the tip of the rotation handle 40 and extends along the longitudinal direction of the body 10. When the sliding part 20 is located at the rear end of the body 10, the noose 32 is located in the protective tube 50. When the sliding part 20 is moved to the front end of the body 10, Is protruded to the outside of the protective tube (50).

The medical snare according to the present invention is used in the following manner at the time of colonoscopic polypectomy.

First, the protective tube 50 of the medical snare is inserted into the large intestine. At this time, the sliding portion 20 is located at the rear end of the body 10, and the noose 32 is located in the protection tube 50. Thereafter, the sliding portion 20 is moved to the distal end portion of the body 10 so that the noose 32 is protruded to the outside of the protective tube 50 and the current is supplied to the conductive portion 30 in the state of surrounding the polyp with the noose 32 The polyp is resected.

The slidable portion 20 is moved to adjust the protruding length of the noose 32 or the rotation handle 40 is rotated to adjust the angle of the noose 32 Since the rotation of the rotation handle 40 by the configuration of the contact shell 33 or the like makes it possible to reliably maintain the electrical contact state even though a part of the configuration of the conductive portion 30 rotates with respect to the other configuration The medical snare can be stably operated.

A scale indicating the position of the noose 32 may be formed on the outer surface of the body 10 so that the practitioner can easily confirm the position and the angle of the snare 32 when the medical snare is used, A mark may be formed on the outer side surface at a position corresponding to the angle of the noose 32.

The conductive portion 30 may further include a cap 35 for opening and closing an inlet of the contact hole 34a of the electrode portion 34. [

When the contact ball 31a enclosed in the contact shell 33 is inserted into the contact hole 34a of the electrode unit 34 while assembling the medical snare according to the present invention, So that the contact ball 31a can be easily inserted into the contact hole 34a and the contact hole 34a can be easily inserted into the contact hole 34a, So that the contact ball 31a or the like does not come off from the hole 34a.

The cap 35 can be screwed to the electrode portion 34 by forming an interlocking thread on the entrance of the contact hole 34a and the cap 35, respectively. In this case, it is possible to assemble the conductive portion 30 very easily.

The medical snare according to the present invention may further include an auxiliary handle (60).

The auxiliary handle 60 is rotatably coupled to the rear end of the body 10 on the basis of an axis formed in the longitudinal direction of the body 10. [ And a hole 61 through which a finger can be inserted.

When the position of the body 10 is fixed by inserting one finger into the auxiliary handle 60 and the sliding portion 20 is moved with the remaining fingers, the sliding portion 20 can be easily moved relative to the body 10 with one hand It is possible to move it. Since the auxiliary handle 60 is rotatably formed with respect to the body 10, the angle of the auxiliary handle 60 can be adjusted so that the practitioner can take an appropriate posture to operate the medical snare.

The medical snare according to the present invention may further include a second protection tube (70).

The second protection tube 70 is disposed inside the protection tube 50 in the form of wrapping the extension portion 31 of the conductive portion 30 and is made of Teflon.

The second protection tube 70 made of Teflon is excellent in heat resistance and is not damaged even if the extension part 31 is heated while the current flows through the conductive part 30 and the protection tube 50 is damaged by the heat of the extension part 31 Can be prevented. In addition, the frictional force generated when the extension 31 is moved can be reduced so that it can move smoothly in the protection tube 50.

The rotation handle 40 may include a first shrinking portion 41, a second shrinking portion 42, a connecting portion 43, and a handle portion 44. Fig. 5 is an explanatory view of such a rotation handle 40. Fig.

The first shrinking portion 41 has a rear end connected to the body 10 and a first hole 41a through which the extension portion 31 of the conductive portion 30 passes. The second shrinking portion 42 is spaced from the first shrinking portion 41 toward the protection tube 50 and has a second through hole 42a through which the extension 31 passes. A protection tube (50) is fixed to the tip end of the second shrinking portion (42). The end faces of the first through hole 41a and the second through hole 42a are formed slightly larger than the end face of the extending portion 31 so that the first through hole 41a and the second through hole 42a extend The portion 31 can be rotated.

The connection portion 43 is disposed parallel to the axes of the first through hole 41a and the second through hole 42a, that is, at a position deviated from the axis of the first through hole 41a and the second through hole 42a And connects the first shrinking portion 41 and the second shrinking portion 42 to each other.

The handle portion 44 is sandwiched between the first shrinking portion 41 and the second shrinking portion 42 and is rotatable with respect to the first shrinking portion 41 and the second shrinking portion 42. And a sliding hole 44a having a cross-sectional shape engaging with the end surface of the extending portion 31 is formed at the center. A short first fastening shaft 41b is protruded at the tip end of the first shrinking fastening portion 41 and a short second fastening shaft 42b is formed at the rear end of the second shrinking fastening portion 42, And the first fixing shaft 41b and the second fixing shaft 42b are inserted into the fixing grooves 44b of the handle portion 44 so as to prevent the movement of the handle portion 44. [ It is possible to fix the position between the first shrinking portion 41 and the second shrinking portion 42.

When the handle portion 44 is rotated by the rotation handle 40, the extension portion 31 of the conductive portion 30 rotates together with the handle portion 44, so that the noose 32 formed on the tip of the extension portion 31 The angle is adjusted. The extended portion 31 simply passes through the first through hole 41a of the first shrinkable portion 41 and the second hole 42a of the second shrinkable portion 42 so that when the extended portion 31 rotates The first shrinking portion 41 and the second shrinking portion 42 do not rotate. The protective tube 50 fixed to the second shrinking portion 42 also does not rotate when the handle portion 44 rotates.

It is also possible that the protective tube 50 is formed to rotate together with the rotation handle 40 as shown in Fig.

In this case, the rotation handle 40 includes a fixed portion 45 fixedly coupled to the distal end of the body 10, and a fixed portion 45 rotatably coupled to the fixed portion 45 and having a distal end fixed to the protective tube 50 And a rotary part 46. A through hole 45a having a larger cross section than the cross section of the extension section 31 is formed at the center of the fixing section 45 and is formed at the center of the rotation section 46 and has a cross section that engages with the cross section of the extension section 31 A sliding hole 46a is formed. Accordingly, when the rotary part 46 is rotated, the extension part 31 and the protection tube 50 rotate together.

When the protection tube 50 does not rotate together with the extension 31, the extension portion 31 rubs against the inner surface of the protection tube 50 when rotating the extension 31, The rotation amount of the extension portion 31 and the rotation amount of the extension portion 31 may be different from each other, or the extension portion 31 may rotate smoothly.

However, if the protection tube 50 and the extension portion 31 are formed to rotate together by rotating the rotation portion 46 of the rotation handle 40, the extension portion 31 rotates and rubs against the protection tube 50 It is possible to prevent the above-described problem from occurring.

The rotation handle 40 of the medical snare and the protection tube 50 according to the present invention can be connected by the connection end tube 80. [ At this time, the rear end portion of the protection tube 50 may be formed with a large diameter portion 51 having a larger diameter than other portions of the protection tube 50. 7 is an explanatory view of the protective tube 50. As shown in Fig.

The distal end of the connecting end tube 80 is formed with a reduced diameter portion 81 smaller in diameter than other portions of the connecting end tube 80. When the protective tube 50 is passed through the connecting end tube 80, Diameter portion 81 of the connecting end tube 80 is caught. When the connecting end tube 80 is engaged with the distal end portion of the rotation handle 40 in a state in which the enlarged portion 51 of the protective tube 50 is caught by the reduced diameter portion 81 of the connecting short tube 80, Is interposed between the outer surface of the distal end portion of the rotation handle 40 and the inner surface of the reduced diameter portion 81 of the connecting end tube 80 so that the protective tube 50 is fixed with respect to the rotation handle 40 .

The connecting end tube 80 can be screwed to the rotation handle 40, for example.

When the second protective tube 70 is formed in the protective tube 50, the rear end of the second protective tube 70 is also provided with a second enlarged diameter portion The connection pipe 80 is connected to the rotation handle 51 in a state in which the enlarged diameter portion 51 is engaged with the reduced diameter portion 81 of the connection short pipe 80 and the second enlarged diameter portion 71 is fitted to the enlarged diameter portion 51, It is possible to fix the position of the second protection tube 70 as well as the protection tube 50 to the rotation handle 40 very easily by engaging with the rotation handle 40. [

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

1: medical snare
10: Body 20: Sliding part
30: conductive portion 31: extension portion
31a: contact ball 32: noose
33: contact shell 34: electrode part
34a: contact hole 35: cap
40: rotation handle 41: first shrinking portion
41a: first through hole 42: second shrinking portion
42a: second through hole 43: connecting portion
44: handle portion 44a: sliding hole
50: protection tube 51:
60: auxiliary handle 70: second protection tube
80: connecting end tube 81:

Claims (8)

Tubular body;
A sliding part formed to be movable along a longitudinal direction of the body;
An extension extending along the longitudinal direction of the body in the body and formed with a contact ball at a rear end thereof, a noose formed at the tip of the extension, a contact A conductive part having a shell and an electrode part fixed to the sliding part, one end of which protrudes outwardly of the body, and the other end of which is provided with a contact hole into which a contact ball surrounded by the contact shell is inserted;
A rotation handle rotatably coupled to an end of the body with respect to an axis formed in the longitudinal direction of the body to rotate the extension; And
And a protection tube coupled to a distal end of the rotation handle and formed along the longitudinal direction of the body,
The contact shell further includes an extension portion extending from the inlet of the contact shell to the outside of the contact shell and increasing in diameter toward the outer side of the contact shell so that the extension is pressed by the inner surface of the contact hole Medical snare.
The method according to claim 1,
Wherein the conductive portion further includes a cap for opening and closing the contact hole inlet of the electrode portion.
3. The method of claim 2,
And the cap is screwed to the electrode portion.
The method according to claim 1,
Further comprising an auxiliary handle rotatably coupled to a rear end of the body with respect to an axis formed in the longitudinal direction of the body.
The method according to claim 1,
And a second protective tube made of Teflon material is disposed inside the protective tube.
The method according to claim 1,
The rotation handle
A first shrinking portion having a rear end coupled to the body and a first passage hole through which the extension extends,
A second shrinking portion disposed at a distance from the first shrinking portion to the protection tube and having a tip fixed to the protection tube and a second hole passing through the extension at the center,
A connecting portion that is disposed in parallel to the first passage hole and the second passage hole and connects the first shrinking portion and the second shrinking portion,
And a sliding hole formed in the center of the sliding hole and having a cross section that is engaged with an end face of the extending portion, the sliding hole being formed between the first shrinking fixture and the second shrinking fixture and rotating with respect to the first shrinking fixture and the second shrinking fixture And a medical snare.
The method according to claim 1,
And the protective tube is formed to rotate together with the rotation handle.
The method according to claim 1,
Wherein a rear end portion of the protection tube is formed with a reduced diameter portion,
Wherein the protective tube is coupled to a distal end portion of the rotation handle by a connection tube having a distal end portion and a distal end portion of the rotation handle engaged with the enlarged diameter portion in the axial diameter portion.

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