Snare

Abstract

The snare comprises a handle, a pull handle and a suction sleeve, the handle comprises a shell, a guide rod, an injector and a pipe sheath, a first cavity is formed in the shell, the guide rod, the injector and the pipe sheath are fixedly installed in the shell, the pull handle is installed on the guide rod, the pull handle is provided with a steel wire, the steel wire penetrates through the first cavity and the pipe sheath, and a cutting wire is arranged at the end, away from the pull handle, of the steel wire. One end, far away from the shell, of the tube sheath is provided with an end part, the end part is provided with a suction sleeve, the handle can slide along the guide rod, the cutting wire can extend out of the suction sleeve or retract into the suction sleeve by pushing and pulling the handle, the injector is communicated with the first cavity, and the first cavity is communicated with the suction sleeve through the tube sheath. The negative pressure is formed at the position of the suction sleeve by pulling the injector, the cutting wire is retracted into the suction sleeve after cutting a polyp, the cut polyp is sucked through the negative pressure of the suction sleeve, the polyp can be sucked immediately after cutting, and the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to a snare device. Background Art

[0002] A snare device is a medical device used in endoscopic surgeries. It is a device that uses a nylon rod to tighten a slip knot pre-tied with an absorbable thread or a synthetic thread to ligate blood vessels, polyps, or other tubular structures. During gastrointestinal endoscopy surgeries, the tightening ring at the front end of the snare device can be placed around the root of the polyp, and by tightening the tightening ring, the polyp in the gastrointestinal wall can be cut off. However, during the current surgical operation process, after the polyp is cut off, the snare device needs to be withdrawn from the endoscope tube, and then a clip is inserted to remove the cut-off polyp. In this process, it is very easy to cause the loss of the cut-off polyp. Therefore, a technical solution is needed to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and be able to take out the cut-off polyp and the snare device simultaneously, and provide a snare device.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a snare device, which includes a handle, a pull handle, and a suction sleeve. The handle includes a housing, a guide rod, a syringe, and a sheath. A first cavity is provided inside the housing. The guide rod, the syringe, and the sheath are fixedly installed on the housing. The pull handle is installed on the guide rod. The pull handle is provided with a steel wire. The steel wire passes through the first cavity and the sheath. A cutting wire is provided at one end of the steel wire away from the pull handle. An end portion is provided at one end of the sheath away from the housing. The suction sleeve is installed on the end portion. The pull handle can slide along the guide rod. Pushing and pulling the pull handle can make the cutting wire extend out of the suction sleeve or retract into the suction sleeve. The syringe communicates with the first cavity, and the first cavity communicates with the suction sleeve through the sheath.

[0006] Further, the guide rod is provided with a guide groove, and the pull handle can slide along the guide groove. The guide rod is provided with a channel that communicates the first cavity and the guide groove. The steel wire is installed with a guide sleeve. Sealing rings are installed at both ends of the channel, and the sealing rings are hermetically connected to the guide sleeve.

[0007] Further, a framework is installed inside the first cavity. The framework includes a plurality of support rings. The plurality of support rings are distributed along the length direction of the first cavity. At least a part of the guide sleeve is located inside the first cavity. The guide sleeve penetrates through the plurality of support rings, and the plurality of support rings form a sliding guide for the guide sleeve inside the first cavity.

[0008] Furthermore, the support ring is provided with ventilation holes which communicate the spaces on both sides of the support ring.

[0009] Furthermore, the housing is provided with a mounting seat on which the syringe is installed. The mounting seat is provided with a connecting groove which communicates the first cavity and the syringe. Pulling the piston of the syringe can form a negative pressure at the suction sleeve.

[0010] Furthermore, the suction sleeve is provided with a constriction opening which divides the suction sleeve into a suction opening and a second cavity. The suction opening is located at one end of the suction sleeve away from the end portion, and the second cavity communicates with the sheath.

[0011] Furthermore, the end portion is provided with a through hole which communicates the suction sleeve and the sheath. The cutting wire is provided with a limiting portion, and the through hole forms a limit for the limiting portion to contract into the sheath.

[0012] Furthermore, the guiding groove communicates with the end face of the guiding rod away from the housing, and an end cover is installed at one end of the guiding rod away from the housing.

[0013] Furthermore, the handle is provided with two pull rings which are respectively located on both sides of the handle, and the pull rings are located outside the guiding rod.

[0014] The beneficial effects of the present utility model are as follows:

[0015] By installing a suction sleeve at the end of the sheath in the present utility model, pulling the syringe forms a negative pressure at the suction sleeve. After the cutting wire cuts the polyp, it retracts into the suction sleeve, and the cut polyp is sucked through the negative pressure of the suction sleeve, so that the polyp can be sucked immediately after cutting, making the operation more convenient. Description of the Drawings

[0016] Figure 1 is a schematic diagram of an embodiment.

[0017] Figure 2 is a sectional view of an embodiment.

[0018] Figure 3 is Figure 2 an enlarged view of part A in

[0019] Figure 4 is Figure 2 an enlarged view of part B in

[0020] Reference numerals: 1, handle; 11, housing; 111, first cavity; 112, skeleton; 1121, support ring; 1122, vent hole; 113, mounting seat; 1131, communication groove; 12, guide rod; 121, guide groove; 122, channel; 123, sealing ring; 13, syringe; 14, sheath; 141, end; 1411, through hole; 2, pull handle; 21, pull ring; 22, steel wire; 221, cutting wire; 2211, limiting portion; 222, guide sleeve; 3, suction sleeve; 31, suction port; 32, shrinkage port; 33, second cavity; 4, end cap. Detailed implementation manners

[0021] Next, the technical solutions in this embodiment will be clearly and completely described in conjunction with the accompanying drawings in this embodiment. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figure 1 , Figure 2 shown, this embodiment discloses a snare, including a handle 1, a pull handle 2, and a suction sleeve 3. The handle 1 includes a housing 11, a guide rod 12, a syringe 13, and a sheath 14. A first cavity 111 is provided inside the housing 11. The guide rod 12, the syringe 13, and the sheath 14 are fixedly installed on the housing 11. Both ends of the housing 11 are open. The guide rod 12 and the sheath 14 are respectively installed at the open ends of the housing 11. The pull handle 2 is installed on the guide rod 12. The pull handle 2 can slide along the guide rod 12. The guide rod 12 is provided with a guide groove 121. The pull handle 2 can slide along the guide groove 121. The pull handle 2 is provided with a steel wire 22. The steel wire 22 passes through the first cavity 111 and the sheath 14. One end of the steel wire 22 away from the pull handle 2 is provided with a cutting wire 221. The steel wire 22 and the cutting wire 221 have the same structure as that of the existing snare, and the specific structure will not be described in detail. One end of the sheath 14 away from the housing 11 is provided with an end 141. The suction sleeve 3 is installed at the end 141. Pushing and pulling the pull handle 2 can make the cutting wire 221 extend out of the suction sleeve 3 or retract into the suction sleeve 3. When the pull handle 2 is at the position closest to the housing 11 in the guide groove 121, the cutting wire 221 can completely extend out of the suction sleeve 3. During the process of the pull handle 2 moving away from the housing 11, the cutting ring formed by the cutting wire 221 can gradually close to cut the polyp until it is completely retracted into the suction sleeve 3.

[0023] As Figure 4As shown in the figure, the guide rod 12 is provided with a channel 122. The channel 122 communicates with the first cavity 111 and the guide groove 121. The steel wire 22 is installed with a guide sleeve 222. Sealing rings 123 are installed at both ends of the channel 122. The guide sleeve 222 can prevent the steel wire 22 from deforming. The outer wall of the guide sleeve 222 is smooth and can be in interference fit with the sealing ring 123 to better achieve sealing. The sealing ring 123 is hermetically connected to the guide sleeve 222. The sealing ring 123 can ensure that the part of the guide sleeve 222 passing through the channel 122 is in a sealed state, and can separate the first cavity 111 and the channel 122 to play a sealing role.

[0024] The handle 2 is provided with pull rings 21. The number of pull rings 21 is two. The two pull rings 21 are respectively located on both sides of the handle 2, which can pull the handle 2 more stably. The pull rings 21 are located outside the guide rod 12. The pull rings 21 can facilitate the pushing and pulling operation of the handle 2. The guide groove 121 communicates with the end face of the guide rod 12 away from the housing 11. The handle 2 is installed into the guide groove 121 from the end of the guide rod 12 away from the housing 11. An end cover 4 is installed at the end of the guide rod 12 away from the housing 11. The end cover 4 can support the end of the guide rod 12 away from the housing 11 and limit the moving distance of the handle 2 away from the housing 11.

[0025] More preferably, a skeleton 112 is installed in the first cavity 111. The skeleton 112 includes a plurality of support rings 1121. The plurality of support rings 1121 are distributed along the length direction of the first cavity 111. At least part of the guide sleeve 222 is located in the first cavity 111. The guide sleeve 222 penetrates through the plurality of support rings 1121. The plurality of support rings 1121 form a sliding guide for the guide sleeve 222 in the first cavity 111. The support rings 1121 can support the part of the steel wire 22 located in the first cavity 111 and prevent the steel wire 22 from deforming in the first cavity 111. The support rings 1121 are provided with ventilation holes 1122. The ventilation holes 1122 communicate the spaces on both sides of the support rings 1121 so that the inside and outside of the skeleton 112 can be air-communicated.

[0026] The housing 11 is provided with a mounting seat 113. The syringe 13 is installed on the mounting seat 113. The mounting seat 113 is provided with a communication groove 1131. The opening part of the syringe 13 is connected to the communication groove 1131. The communication groove 1131 communicates the first cavity 111 and the syringe 13. The syringe 13 communicates with the first cavity 111. The first cavity 111 is communicated with the suction sleeve 3 through a sheath 14. The first cavity 111 and the channel 122 are separated by a sealing ring 123. Pulling the piston of the syringe 13 can extract the air in the first cavity 111, and thus a negative pressure can be formed at the suction sleeve 3. During the actual operation, after the cutting wire 221 is retracted into the suction sleeve 3, the suction sleeve 3 is aligned with the cut polyp, and the piston of the syringe 13 is pulled to suck the polyp into the suction sleeve 3.

[0027] As Figure 3As shown, at this time, the cutting wire 221 is in a retracted state. The suction sleeve 3 is provided with a contraction opening 32. The contraction opening 32 divides the suction sleeve 3 into a suction opening 31 and a second cavity 33. The suction opening 31 is located at one end of the suction sleeve 3 away from the end portion 141. The suction opening 31 is in the shape of a flared horn that opens outward. The contraction opening 32 can play a certain role in blocking polyps sucked into the second cavity 33, preventing the situation where polyps accidentally fall out of the suction sleeve 3 after being sucked into the suction sleeve 3. The end portion 141 is provided with a through hole 1411. The through hole 1411 communicates the suction sleeve 3 and the sheath 14. The cutting wire 221 is provided with a limiting portion 2211. The through hole 1411 forms a limit for the limiting portion 2211 to contract into the sheath 14. On the one hand, the through hole 1411 can communicate the air between the sheath 14 and the suction sleeve 3. On the other hand, it allows the cutting wire 221 to extend out of the sheath 14, and when the cutting wire 221 is retracted, the through hole 1411 limits the retraction position of the cutting wire 221.

[0028] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A snare, characterized in that, It includes a handle (1), a pull handle (2), and a suction sleeve (3). The handle (1) includes a housing (11), a guide rod (12), a syringe (13), and a sheath (14). Inside the housing (11), there is a first cavity (111). The guide rod (12), the syringe (13), and the sheath (14) are fixedly installed on the housing (11). The pull handle (2) is installed on the guide rod (12). The pull handle (2) is provided with a steel wire (22). The steel wire (22) passes through the first cavity (111) and the sheath (14). At one end of the steel wire (22) away from the pull handle (2), there is a cutting wire (221). At one end of the sheath (14) away from the housing (11), there is an end portion (141). The suction sleeve (3) is installed on the end portion (141). The pull handle (2) can slide along the guide rod (12). Pushing and pulling the pull handle (2) can make the cutting wire (221) extend out of the suction sleeve (3) or retract into the suction sleeve (3). The syringe (13) communicates with the first cavity (111), and the first cavity (111) communicates with the suction sleeve (3) through the sheath (14).

2. The snare according to claim 1, characterized in that, The guide rod (12) is provided with a guide groove (121). The pull handle (2) can slide along the guide groove (121). The guide rod (12) is provided with a channel (122). The channel (122) communicates the first cavity (111) and the guide groove (121). The steel wire (22) is installed with a guide sleeve (222). Sealing rings (123) are installed at both ends of the channel (122). The sealing rings (123) are sealingly connected to the guide sleeve (222).

3. The snare according to claim 2, characterized in that, A skeleton (112) is installed in the first cavity (111). The skeleton (112) includes a plurality of support rings (1121). The plurality of support rings (1121) are distributed along the length direction of the first cavity (111). At least a part of the guide sleeve (222) is located in the first cavity (111). The guide sleeve (222) penetrates through the plurality of support rings (1121). The plurality of support rings (1121) form sliding guidance for the guide sleeve (222) in the first cavity (111).

4. The snare according to claim 3, characterized in that, The support ring (1121) is provided with ventilation holes (1122). The ventilation holes (1122) communicate the spaces on both sides of the support ring (1121).

5. The snare according to claim 1, wherein, The housing (11) is provided with a mounting seat (113). The syringe (13) is installed on the mounting seat (113). The mounting seat (113) is provided with a communication groove (1131). The communication groove (1131) communicates the first cavity (111) and the syringe (13). Pulling the piston of the syringe (13) can form negative pressure at the suction sleeve (3).

6. The snare according to claim 1, wherein, The suction sleeve (3) is provided with a constriction opening (32), and the constriction opening (32) divides the suction sleeve (3) into a suction opening (31) and a second cavity (33). The suction opening (31) is located at one end of the suction sleeve (3) away from the end portion (141), and the second cavity (33) communicates with the sheath (14).

7. The snare according to claim 6, wherein The end portion (141) is provided with a through hole (1411), and the through hole (1411) communicates the suction sleeve (3) with the sheath (14). The cutting wire (221) is provided with a limiting portion (2211), and the through hole (1411) forms a limit for the contraction of the limiting portion (2211) into the sheath (14).

8. The snare according to claim 2, wherein, The guiding groove (121) communicates with the end face of the guiding rod (12) away from the housing (11), and an end cap (4) is installed at one end of the guiding rod (12) away from the housing (11).

9. The snare according to claim 1, characterized in that, The handle (2) is provided with pull rings (21). The number of the pull rings (21) is two, and the two pull rings (21) are respectively located on both sides of the handle (2). The pull rings (21) are located outside the guiding rod (12).

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