CN213489153U - Snare with injection function - Google Patents

Abstract

The application provides a snare with an injection function, which comprises an outer sheath tube; the inner sheath tube is arranged in the outer sheath tube and is in sliding fit with the outer sheath tube; the snare body is connected with the inner sheath tube, and the inner sheath tube is used for driving the snare body to extend out or retract into the outer sheath tube; the guide head is provided with a first through hole and is connected with the snare body, and the snare body can drive the guide head to be inserted into or separated from the outer sheath tube; and the needle head is arranged in the inner sheath and is in sliding fit with the inner sheath, and the needle head can penetrate through the first through hole and extend out of the outer sheath or retract into the outer sheath. The function is various, and the simple operation is reliable, and the operation success rate is high.

Description

Snare with injection function

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to a snare with injection function.

Background

Snares are common instruments for polyp removal. Endoscopic mucosal resection usually requires an endoscopic injection needle to inject the lesion tissue to bulge for snare resection. In the prior art, the injection needle is required to be used for injecting the pathological change tissue to swell the pathological change tissue, then the snare is used for excision, the instrument needs to be replaced in the process, the operation time is long, meanwhile, the injection liquid runs off, after the instrument is replaced, the swelling effect possibly fails, repeated operation is possibly required, the operation is complicated, and the cost burden of a patient is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a snare with injection function, it can optimize the operation step, reduces the operation degree of difficulty, improves the operation success rate, reduces patient's burden.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present invention provides a snare with an injection function, including:

an outer sheath tube;

the inner sheath tube is arranged in the outer sheath tube and is in sliding fit with the outer sheath tube;

the snare body is connected with the inner sheath tube, and the inner sheath tube is used for driving the snare body to extend out or retract into the outer sheath tube;

the guide head is provided with a first through hole and is connected with the snare body, and the snare body can drive the guide head to be inserted into or separated from the outer sheath tube;

and the needle head is arranged in the inner sheath and is in sliding fit with the inner sheath, and the needle head can penetrate through the first through hole and extend out of the outer sheath or retract into the outer sheath.

In an alternative embodiment, the end of the guide head remote from the sheath is cambered.

In an optional embodiment, the guiding head comprises a first inserting part and a first limiting part, one end surface of the first limiting part is provided with a connecting area and an abutting area, the first inserting part is connected with the connecting area, the first through hole penetrates through the first inserting part and the first limiting part at the same time, and the first inserting part and the first limiting part are arranged along the extending direction of the first through hole; the first inserting part is used for being inserted in the outer sheath tube and enabling the abutting area to abut against the end face of the outer sheath tube;

the snare body is connected with the first insertion part.

In an optional embodiment, a first clamping groove is formed in the outer peripheral surface of the first insertion part, the snare body is clamped with the first clamping groove, and the snare body does not protrude out of the outer peripheral surface of the first insertion part.

In an optional embodiment, the snare further comprises a connecting piece, the connecting piece is provided with a second through hole and is connected with the inner sheath tube, and the snare body is connected with the connecting piece; the needle can pass through the second through hole.

In an alternative embodiment, the snare body is snap-fit to the connector.

In an optional embodiment, the connecting piece includes a second insertion part and a second limiting part which are connected, the second through hole penetrates through the second insertion part and the second limiting part at the same time, the second limiting part protrudes out of the outer peripheral surface of the second insertion part, the second insertion part is inserted into the inner sheath tube, and the second limiting part abuts against the end surface of the inner sheath tube.

In an alternative embodiment, the inner sheath, the outer sheath, the needle, and the first through-hole are coaxially disposed.

In an alternative embodiment, the needle head comprises a puncture tube section and a needle tube section, the puncture tube section is connected with the needle tube section, the needle tube section protrudes out of the tube wall of the puncture tube section, and the needle tube section is in sliding fit with the inner sheath tube;

when the puncture tube section passes through the first through hole and extends out of the guide head, the end face of the needle tube section can be abutted against the guide head.

In an alternative embodiment, the snare further comprises a handle assembly to which the inner sheath and the outer sheath are each connected, the handle assembly being for driving the inner sheath to slide relative to the outer sheath.

The embodiment of the utility model provides a beneficial effect is:

in summary, the present embodiment provides a snare with an injection function, when in use, the snare body can be retracted into the external sheath tube, and under the action of the endoscope, the needle passes through the first through hole and extends out of the distal end of the external sheath tube, so as to inject the liquid medicine into the lesion tissue, thereby making the lesion tissue bulge. The needle is then operated to retract within the outer sheath. At this time, the injection work is completed. Then, the inner sheath tube is operated to drive the snare body to extend out, and the expanded snare body is used for cutting the lesion tissue. The snare provided by the embodiment can be used for cutting by utilizing the snare body after injection operation is completed, the middle interval time is short, the bulge is not easy to lose efficacy, the operation is simple and convenient, the operation steps are optimized, the operation difficulty is reduced, the operation success rate is improved, and the pain of a patient is relieved.

Simultaneously, the syringe needle passes first through-hole and pierces the tissue, and the syringe needle is more stable, and the position of piercing of syringe needle is more accurate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a state of a snare according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of another state of the snare according to the embodiment of the present invention;

FIG. 3 is an exploded view of a snare according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a seeker according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connecting member according to an embodiment of the present invention.

Icon:

100-sheath tube; 200-inner sheath; 300-a snare body; 310-a cutting line; 400-a seeker; 401 — a first via; 410-a first mating part; 411-a first card slot; 420-a first limiting part; 500-needle head; 510-piercing the pipe section; 520-a needle tube section; 600-a connector; 601-a second via; 610-a second mating part; 620-a second limiting part; 621-second card slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a snare with an injection function, which can perform polyp extirpation operation in time after the polyp injection is completed, so that the operation efficiency is improved, the operation difficulty is reduced, and the operation success rate is improved.

Referring to fig. 1-5, in the present embodiment, the snare includes:

an outer sheath 100;

an inner sheath 200, the inner sheath 200 is arranged in the outer sheath 100 and is in sliding fit with the outer sheath 100;

the snare body 300, the snare body 300 is connected with the inner sheath 200, and the inner sheath 200 is used for driving the snare body 300 to extend out of or retract into the outer sheath 100;

the guide head 400 is provided with a first through hole 401, the guide head 400 is connected with the snare body 300, and the snare body 300 can drive the guide head 400 to be inserted into the outer sheath tube 100 or separated from the outer sheath tube 100;

and the needle 500 is arranged in the inner sheath 200 and is in sliding fit with the inner sheath 200, and the needle 500 can penetrate through the first through hole 401 and extend out of the outer sheath 100 or retract into the outer sheath 100.

When the snare is used, the snare body 300 can be retracted into the outer sheath tube 100, and under the cooperation of an endoscope, the needle 500 penetrates through the first through hole 401 on the guide head 400 and extends out of the distal end of the outer sheath tube 100, so that liquid medicine is injected to a diseased tissue, and the diseased tissue is raised. The needle 500 is then operated to retract into the sheath 100. At this time, the injection work is completed. Then, the inner sheath 200 is operated to drive the snare body 300 to extend, and the cutting operation of the lesion tissue is performed by using the expanded snare body 300. The snare provided by the embodiment can be used for excision by using the snare body 300 after injection operation is completed, the middle interval time is short, the bulge is not easy to lose efficacy, the operation is simple and convenient, the operation steps are optimized, the operation difficulty is reduced, the operation success rate is improved, and the pain of a patient is relieved.

Meanwhile, the needle 500 penetrates through the first through hole 401 to penetrate into the tissue, the needle 500 is more stable, and the penetrating position of the needle 500 is more accurate.

In this embodiment, optionally, the guiding head 400 includes a first inserting portion 410 and a first limiting portion 420, and the first inserting portion 410 and the second inserting portion 610 are both cylindrical structures. One end face of the first limiting part 420 is provided with a connection area and an abutting area which are concentrically arranged, the first inserting part 410 is connected with the connection area, the first through hole 401 simultaneously penetrates through the first inserting part 410 and the first limiting part 420, and the first inserting part 410 and the first limiting part 420 are arranged along the extending direction of the first through hole 401; the first insertion portion 410 is inserted into the sheath tube 100, and the abutting region abuts against the end surface of the sheath tube 100, so as to limit the insertion depth of the guide head 400 into the sheath tube 100.

Further, a first locking groove 411 is formed in an outer peripheral surface of the first insertion part 410, and the first locking groove 411 extends in an axial direction of the first through hole 401. The number of the first clamping grooves 411 is two, the two first clamping grooves 411 are symmetrically distributed, and the two first clamping grooves 411 are respectively used for clamping two ends of the snare body 300.

Further, first draw-in groove 411 can be the arc wall, and the cross sectional shape of first draw-in groove 411 is the arc section, and the central angle of this arc section is greater than 180 degrees, so design, can be with the direct joint of snare body 300 in first draw-in groove 411, and be difficult for deviating from in first draw-in groove 411. When the snare body 300 is clamped in the first clamping groove 411, the outer circumferential surface of the snare body 300 does not protrude out of the notch of the first clamping groove 411, and the first insertion part 410 is not easily influenced to be inserted in the sheath tube 100.

In addition, in other embodiments, one end of the first insertion part 410 away from the first limiting part 420 is provided with a chamfer, so that the first insertion part 410 can be conveniently inserted into the sheath tube 100.

Optionally, one end of the first limiting portion 420, which is away from the first inserting portion 410, is an arc surface, and in the surgical process, one end of the first limiting portion 420, which is away from the first inserting portion 410, is a distal end, which is first in contact with the tissue, and the distal end of the first limiting portion 420 is an arc surface, which is not easy to scratch the tissue.

In this embodiment, optionally, the snare further includes a connector 600, the connector 600 is provided with a second through hole 601, the snare body 300 is connected to the connector 600, the connector 600 is inserted into the inner sheath 200, and the needle 500 can pass through the second through hole 601 of the connector 600. The inner sheath 200 is slid to drive the connecting piece 600 to move, so as to drive the snare body 300 to slide relative to the outer sheath 100, and thus the snare body 300 extends out of the outer sheath 100 or retracts into the outer sheath 100.

Further, the connecting member 600 includes a second inserting portion 610 and a second limiting portion 620 connected to each other, the second inserting portion 610 and the second limiting portion 620 are both cylindrical structures, the second inserting portion 610 and the second limiting portion 620 are coaxially disposed, and an outer diameter of the second inserting portion 610 is smaller than an outer diameter of the second limiting portion 620, in other words, the second limiting portion 620 protrudes out of an outer circumferential surface of the second inserting portion 610. During assembly, the second inserting portion 610 is inserted into the inner sheath 200, and the end surface of the second limiting portion 620 connected to the second inserting portion 610 abuts against the end surface of the inner sheath 200 to limit the depth of the connecting member 600 inserted into the inner sheath 200.

It should be noted that the second through hole 601 simultaneously penetrates through the second plugging portion 610 and the second limiting portion 620, and the second through hole 601 may be a cylindrical hole, and the second through hole 601 is coaxially disposed with the second plugging portion 610 and the second limiting portion 620.

Further, the second limiting portion 620 is provided with two second clamping grooves 621, each second clamping groove 621 is an arc-shaped groove, each second clamping groove 621 extends along the axis of the second through hole 601, and the two second clamping grooves 621 are symmetrically arranged. The cross section of each second clamping groove 621 is arc-shaped, and the central angle of the arc-shaped is greater than 180 degrees, so that the snare body 300 can be directly clamped in the second clamping groove 621 and is not easy to be separated from the second clamping groove 621. When the snare body 300 is clamped in the second clamping groove 621, the outer circumferential surface of the snare body 300 does not protrude out of the notch of the second clamping groove 621, and the connection member 600 is not easily influenced to slide relative to the sheath tube 100.

Further, one end of the second inserting portion 610, which is far away from the second limiting portion 620, is provided with a chamfer, so that the second inserting portion 610 can be conveniently inserted into the inner sheath 200.

In this embodiment, optionally, needle 500 comprises a puncture tube section 510 and a needle tube section 520, wherein puncture tube section 510 is connected to and coaxially arranged with needle tube section 520, needle tube section 520 protrudes radially outward from puncture tube section 510 to the wall of puncture tube section 510, and needle tube section 520 is slidably fitted to inner sheath tube 200. That is, the outside diameter of the needle tubing section 520 is larger than the outside diameter of the penetrating tubing section 510. By such design, when the puncture tube section 510 passes through the first through hole 401 and extends out of the guide head 400, the end surface of the needle tube section 520 connected with the puncture tube section 510 can be abutted against the guide head, so as to limit the length of the needle 500 extending out of the guide head 400, namely, the depth of the needle 500 penetrating into the tissue, and improve the safety.

In other embodiments, the snare further comprises a handle assembly (not shown) to which both the inner sheath 200 and the outer sheath 100 are connected, the handle assembly being adapted to drive the inner sheath 200 to slide relative to the outer sheath 100.

In the snare provided by the embodiment, the needle 500 is inserted into the inner sheath 200, and the needle 500 can slide back and forth relative to the inner sheath 200; the inner sheath 200 is inserted into the outer sheath 100, and the inner sheath 200 can slide to and fro relative to the outer knocking tube. The snare body 300 comprises two cutting lines 310, two ends of each cutting line 310 are respectively clamped in a first clamping groove 411 of the guide head 400 and a second clamping groove 621 of the connecting piece 600, and the connecting piece 600 is inserted in the inner sheath tube 200. In the initial state, the needle 500 is accommodated in the inner sheath 200, the guide 400 is inserted into the outer sheath 100, and the snare body 300 is accommodated in the outer sheath 100. When injection is required, the needle 500 is operated to slide relative to the inner sheath 200, and the needle 500 sequentially passes through the second through hole 601 and the first through hole 401 and protrudes from the first through hole 401 to penetrate into the tissue for injection. After the injection is completed, the needle 500 is retracted, at this time, the inner sheath 200 is directly operated to slide relative to the outer sheath 100, the guide head 400 is separated from the outer sheath 100 in the process, the snare body 300 extends out of the outer sheath 100 and is unfolded, and the snare body 300 is sleeved outside the tissue raised by the injection to perform the extirpation operation. The whole operation process is convenient and reliable, the operation efficiency is high, and the success rate is high.

The snare provided in the embodiment has diversified functions, is convenient and reliable to operate, reduces the operation difficulty, and has high operation success rate.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A snare with injection functionality, comprising:

an outer sheath tube;

the inner sheath tube is arranged in the outer sheath tube and is in sliding fit with the outer sheath tube;

the snare body is connected with the inner sheath tube, and the inner sheath tube is used for driving the snare body to extend out or retract into the outer sheath tube;

the guide head is provided with a first through hole, the guide head is connected with the snare body, and the snare body can drive the guide head to be inserted into or separated from the outer sheath tube;

and the needle head is arranged in the inner sheath and is in sliding fit with the inner sheath, and the needle head can penetrate through the first through hole and extend out of the outer sheath or retract into the outer sheath.

2. A snare with an injection function according to claim 1, wherein:

one end of the seeker, which is far away from the outer sheath tube, is an arc surface.

3. A snare with an injection function according to claim 1, wherein:

the guiding head comprises a first inserting part and a first limiting part, one end surface of the first limiting part is provided with a connecting area and an abutting area, the first inserting part is connected with the connecting area, the first through hole penetrates through the first inserting part and the first limiting part at the same time, and the first inserting part and the first limiting part are arranged along the extending direction of the first through hole; the first inserting part is used for being inserted into the outer sheath, and the abutting area abuts against the end face of the outer sheath;

the snare body is connected with the first insertion part.

4. A snare with an injection function according to claim 3, wherein:

the outer peripheral face of the first inserting portion is provided with a first clamping groove, the snare body is clamped with the first clamping groove, and the snare body does not protrude out of the outer peripheral face of the first inserting portion.

5. A snare with an injection function according to claim 1, wherein:

the snare also comprises a connecting piece, wherein the connecting piece is provided with a second through hole and is connected with the inner sheath tube, and the snare body is connected with the connecting piece; the needle can pass through the second through hole.

6. A snare with injection function according to claim 5, wherein:

the snare body is matched with the connecting piece in a clamping mode.

7. A snare with injection function according to claim 5, wherein:

the connecting piece comprises a second inserting portion and a second limiting portion which are connected, the second through hole penetrates through the second inserting portion and the second limiting portion, the second limiting portion protrudes out of the outer peripheral face of the second inserting portion, the second inserting portion is inserted into the inner sheath tube, and the second limiting portion abuts against the end face of the inner sheath tube.

8. A snare with an injection function according to claim 1, wherein:

the inner sheath tube, the outer sheath tube, the needle head and the first through hole are coaxially arranged.

9. A snare with an injection function according to claim 1, wherein:

the needle head comprises a puncture pipe section and a needle pipe section, the puncture pipe section is connected with the needle tube section, the needle pipe section protrudes out of the pipe wall of the puncture pipe section, and the needle pipe section is in sliding fit with the inner sheath pipe;

when the puncture tube section passes through the first through hole and extends out of the guide head, the end face of the needle tube section can be abutted against the guide head.

10. A snare with an injection function according to claim 1, wherein:

the snare further includes a handle assembly, the inner sheath and the outer sheath are both connected to the handle assembly, and the handle assembly is used for driving the inner sheath to slide relative to the outer sheath.

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