CN212382681U

CN212382681U - Guide assembly and circular tube type anastomat

Info

Publication number: CN212382681U
Application number: CN202020855285.8U
Authority: CN
Inventors: 陈伟娜; 孙佳; 曹元阳
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-01-22
Anticipated expiration: 2030-05-20

Abstract

The utility model provides a guide assembly and circular tube type anastomat, the guide assembly is used for guiding the nail storehouse subassembly of circular tube type anastomat to get into the operation position, the nail storehouse subassembly includes a nail section of thick bamboo, the side of a nail section of thick bamboo is provided with at least one window, the guide assembly includes first guide and second guide, the distal end side of a nail section of thick bamboo is located to the first end detachably cover of first guide, when first guide receives the external force towards distal end side direction, first guide can move towards distal end side and break away from with a nail section of thick bamboo; the second guide piece is sleeved on the outer side of the nail barrel, and the second guide piece covers the side face of the far end of the window. The utility model provides a guide assembly for circular tube type anastomat, guide assembly can guide nail storehouse subassembly to get into the operation position well to when taking out nail storehouse subassembly from the tissue after the operation is accomplished, prevent to cause the damage to the tissue mucosa.

Description

Guide assembly and circular tube type anastomat

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to guide assembly and circular tube type anastomat.

Background

In the prior art, a circular tube-type anastomat comprises an anastomat body, an operating handle movably connected with the anastomat body and a nail anvil assembly matched with the anastomat body. The anastomat body comprises a firing assembly and a nail bin assembly arranged on the far end side. In the operation process, two sections of tissues to be anastomosed are placed between the nail anvil of the nail anvil assembly and the nail bin of the nail bin assembly, the distance between the nail anvil and the nail bin is adjusted to gradually clamp the tissues, and then the trigger assembly is driven by the operation handle to enable the anastomotic nails to be formed on the nail anvil, so that anastomotic connection of the two sections of tissues is completed.

During the actual operation, the body portion of the circular tube-type stapler, i.e., the cartridge portion, needs to enter the tissue tract from one end of the tissue. For example, in lower rectal surgery, access is required through the anus, which is a muscular opening and is in a contracted state, making it difficult to insert a large diameter instrument into the anus. As another example, in a gastric bypass or gastric cufflated procedure, the body of the stapler is required to enter the small intestine through a tissue stump and traverse a distance in the small intestine. The small intestine is in a separation state after the pathological tissue is cut off in the operation, and the intestinal walls are in a state of being attached together, so that the nail barrel part of the circular tube type anastomat is not easy to enter the tubular tissue, meanwhile, the inner wall of the digestive tract is a tissue mucosa, and the circular tube type anastomat is easy to damage the mucosa when passing in the small intestine. After the operation is completed, the surgeon needs to take out the nail barrel part from the tissue, and the nail barrel part is easy to damage the mucosa when passing through the tissue in the process of taking out.

The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side. In the stapler, the inner side and the outer side are relative to the axis of the stapler, wherein the side close to the axis is the inner side, and the side far away from the axis is the outer side.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a guide assembly and circular tube type anastomat, guide assembly can guide nail storehouse subassembly to get into the operation position well to when taking out nail storehouse subassembly from the tissue after the operation is accomplished, prevent to cause the damage to the tissue mucosa.

The embodiment of the utility model provides a guide assembly, which is used for a nail bin assembly of a circular tube type anastomat, wherein the nail bin assembly comprises a nail barrel, and the side surface of the nail barrel is provided with at least one window;

the guide assembly includes:

the first end of the first guide piece is detachably sleeved on the distal end side of the nail barrel, and when the first guide piece is subjected to external force towards the distal end side direction, the first guide piece can move towards the distal end side to be separated from the nail barrel;

the second guide piece is sleeved on the outer side of the nail barrel and covers the side face of the far end of the window.

Optionally, the first guide and the second guide are each a flexible material member.

Optionally, the first end of the first guide comprises an elastic part, and when the elastic part is sleeved on the nail barrel, the elastic part is in an expanded state.

Optionally, the second guide is an elastic member, and when the second guide is sleeved outside the nail barrel, the elastic member is in an expanded state.

Optionally, a connecting rib is disposed between the first end of the first guide and the distal end side of the second guide, and when the first guide is subjected to an external force in the distal direction, the first guide can move toward the distal end side to break the connecting rib.

Optionally, there is an overlap region between the first end of the first guide and the distal side of the second guide, and the first end of the first guide covers an outer side surface of the distal side of the second guide at the overlap region.

Optionally, the thickness of the first guide is less than 0.1 mm and/or the thickness of the second guide is less than 0.1 mm.

Optionally, the staple cartridge assembly further includes an anvil pull rod at least partially located inside the staple cartridge, a puncturing portion is disposed on a distal end side of the anvil pull rod, the second end of the first guide is a closed end, and when the anvil pull rod moves to protrude from the distal end side of the staple cartridge toward the distal end side of the stapler, the second end of the first guide is located on the distal end side of the puncturing portion.

Optionally, the staple cartridge assembly further comprises a staple anvil pull rod at least partially located inside the staple cartridge, a puncturing part is arranged on the distal end side of the staple anvil pull rod, an opening is formed in the second end of the first guide, when the staple anvil pull rod moves to protrude out of the distal end side of the staple cartridge towards the distal end side of the anastomat, the puncturing part of the staple anvil pull rod penetrates through the opening, and the second end of the first guide is stopped at the puncturing part.

Optionally, the outer surface of the first guide is at least partially coated with a lubricating layer and/or the surface of the second guide is at least partially coated with a lubricating layer.

The embodiment of the utility model provides a still provide a circular tube type anastomat, including foretell guide assembly.

To sum up, through adopting the utility model discloses a guide assembly, can guide nail storehouse subassembly to get into the operation position well, protect the mucosa layer of stub tissue and tissue, and after nail storehouse subassembly reachd the operation position, exert the external force towards distal end side direction to first guide, can conveniently remove the guide part from distal end side at least partially, operation easy operation, can not increase extra burden for the operation process, can not influence the operation effect because of the existence of guide yet, and when taking out nail storehouse subassembly from the tissue after the operation is accomplished, the second guide can protect the mucosa layer of tissue, prevent to cause the damage to the tissue mucosa, use experience has been promoted.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a staple cartridge assembly;

FIG. 2 is a schematic structural view of the first embodiment of the present invention applied to a cartridge assembly;

FIG. 3 is a cross-sectional view of the first embodiment of the guide assembly of the present invention applied to a cartridge assembly wherein the anvil pull rod is in an initial state;

FIG. 4 is a cross-sectional view of the first embodiment of the guide assembly of the present invention applied to a cartridge assembly wherein the anvil pull rod is in an operative position;

FIG. 5 is a cross-sectional view of the first embodiment of the guide assembly of the present invention applied to a cartridge assembly with the anvil pull rod in the operating position and the first guide removed;

figure 6 is a schematic view of the first and second guide members of the first embodiment of the present invention in cooperation;

FIG. 7 is a schematic view of the guiding assembly and the nail bin assembly according to the first embodiment of the present invention after the connecting ribs are added;

fig. 8 is a schematic structural view of the guide assembly with the addition of the connecting rib according to the first embodiment of the present invention;

FIG. 9 is a cross-sectional view of the guide assembly of the second embodiment of the present invention applied to a cartridge assembly wherein the anvil pull rod is in an initial state;

FIG. 10 is a cross-sectional view of the guide assembly of the second embodiment of the present invention applied to a staple cartridge assembly with the anvil pull rod in the operative position;

FIG. 11 is a schematic structural view of the second embodiment of the present invention with the first guide member sleeved outside the nail barrel;

figure 12 is a schematic view of a second embodiment of the first guide of the present invention removed from the distal end;

fig. 13 is a schematic structural view of a second guide of a second embodiment of the present invention;

fig. 14 is a schematic structural view of a positioning portion added to a second guide according to a second embodiment of the present invention;

FIG. 15 is a schematic view of the second guide of FIG. 14 after deployment;

FIG. 16 is a schematic view of a third embodiment of the guide assembly of the present invention applied to a cartridge assembly;

FIG. 17 is a schematic view of a fourth embodiment of the guide assembly of the present invention applied to a cartridge assembly;

fig. 18 is a schematic structural view of the guiding assembly of the fifth embodiment of the present invention applied to a cartridge assembly.

Reference numerals:

1 cartridge 22 first guide second end

11 first tubular portion 23 first opening

111 distal 3 second guide of the first tubular part

12 distal end side of connecting portion 31 second guide

Distal side 32 of the 121 connection part proximal side of the second guide

122 proximal side 33 second opening of the connection

13 second tubular portion 34 positioning portion

131 proximal side 41 bead of the second tubular part

14 window 42 boss

Distal end side 5 anvil pull rod of 141 window

Proximal side 51 of 142 window distal side of anvil pull rod

2 first guide 6 connecting rib

21 first end of the first guide

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The utility model provides a guide assembly for a circular tube type anastomat and a circular tube type anastomat comprising the guide assembly. The circular tube anastomat comprises an anastomat body, an operating handle movably connected with the anastomat body and a nail anvil assembly matched with the anastomat body. The anastomat body comprises a firing assembly and a nail bin assembly arranged on the far-end side, the nail bin assembly comprises a nail barrel, and at least one window is arranged on the side face of the nail barrel. During operation, the nail box assembly is required to enter the tissue, move forwards to reach a surgical position and then butt with the nail anvil assembly. The guide assembly is used for better guiding the cartridge assembly into a surgical site. Specifically, the guide assembly comprises a first guide and a second guide, wherein a first end of the first guide is detachably sleeved on the distal end side of the nail barrel, and when the first guide is subjected to an external force in the direction of the distal end side, the first guide can move towards the distal end side to be separated from the nail barrel; the second guide piece is sleeved on the outer side of the nail barrel, and the second guide piece covers the side face of the far end of the window.

Therefore, when the nail bin assembly enters the tissue, the injury to the mucosa in the tissue can be effectively prevented through the guiding and protecting effects of the first guide piece and the second guide piece during the operation. After the nail bin assembly reaches the surgical site, at least part of the first guide part is exposed outside the tissue, a doctor can directly clamp the first guide part by using tools such as surgical forceps and the like, and pull force is applied to the far-end side direction of the anastomat, so that the first guide part is integrally separated from the nail bin assembly, the first guide part can be pulled out of the tissue, and the first guide part is prevented from obstructing surgical operation. After the operation is finished, when the nail bin assembly is taken out of the tissue, the tissue mucosa is protected through the second guide piece, and the tissue mucosa can be prevented from being damaged.

The structure of the guide assembly according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it should be understood that the embodiments are not intended to limit the scope of the present invention.

As shown in FIGS. 1 to 5, it is a schematic structural diagram of the guide assembly and the cartridge assembly of the first embodiment of the present invention. In this embodiment, the staple cartridge assembly comprises a staple cartridge 1, and at least one window 14 is opened on a side surface of the staple cartridge 1. The guide assembly comprises a first guide 2 and a second guide 3, a first end 21 of the first guide 2 is detachably sleeved on the distal end side of the nail barrel 1, and when the first guide 2 is subjected to an external force towards the distal end side, the first guide 2 can move towards the distal end side to be separated from the nail barrel 1; the second guide 3 is sleeved outside the nail barrel 1, and the second guide 3 covers the distal side surface 141 of the window 14, so that the nail barrel 1 is not separated even if external force towards the distal end is applied.

From this, when nail storehouse subassembly gets into tissue inside, first guide 2 and second guide 3 can provide fine guide effect for nail section of thick bamboo 1, after nail storehouse subassembly arrives the operation position, first guide 2 is at least partially exposed outside organizing, the doctor can directly use tools such as operation pincers to carry first guide 2, apply pulling force to the distal end side direction of anastomat, first guide 2 is whole to be separated with nail section of thick bamboo 1, thereby can pull out first guide 2 from organizing very conveniently, can not increase extra burden for the operation process, also can not influence the operation effect because of the existence of guide, use experience has been improved. After the operation is finished and the nail bin assembly is taken out of the tissue, the second guide piece 3 can protect the mucosa of the tissue and avoid damaging the tissue in the movement process of the nail bin.

In this embodiment, as shown in fig. 1, the cartridge 1 comprises a first tubular part 11, a connecting part 12 and a second tubular part 13 arranged from the distal side to the proximal side thereof, the viewing window 14 is arranged in the connecting part 12, the distal side 121 of the connecting part 12 is in contact with the first tubular part 11, and the proximal side 122 of the connecting part 12 is in contact with the second tubular part 13. The distal end side 111 of the first tubular part 11 corresponds to the distal end side of the cartridge 1 and the proximal end side 131 of the second tubular part 13 corresponds to the proximal end side of the cartridge 1.

The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side, follows the direction in the axle center of anastomat is the axial, and the direction from the distal end side of anastomat to near-end side promptly, or from the near-end side of anastomat to the direction of distal end side. For example, in the perspective of fig. 3, the distal end side of the cartridge 1 is the upper side and the proximal end side is the lower side, and the distal end side 31 of the second guide 3 is the upper side and the proximal end side 32 is the lower side. In the present invention, for a component, the inner side and the outer side are relative to the axis of the stapler, and the side close to the axis is the inner side, and the side far away from the axis is the outer side.

In this embodiment, the first guide 2 and the second guide 3 are each a flexible material part, so as to avoid damage to the tissue when in contact with the tissue mucosa. Further, the first end 21 of the first guide 2 comprises an elastic part, and when the elastic part is sleeved on the nail barrel 1, the elastic part is in an expanded state, so that the nail barrel 1 is tightly clamped by the elastic part to form a tighter fit with the nail barrel 1, and the nail cartridge assembly is ensured not to be detached when the nail cartridge assembly does not reach the surgical position. In this embodiment, the first guide 2 may be a film made of rubber, plastic, silicon, etc. to reduce the influence on the outer diameter of the cartridge 1, so as not to expand and damage the outer diameter of the tissue to be anastomosed. While the first guide 2 can be easily pulled out of the tissue when subjected to an external force. In this embodiment, the thickness of the first guide 2 is less than 0.1 mm, for example chosen between 0.1 mm and 0.01 mm. In other embodiments, the thickness may be increased or decreased as appropriate, as permitted, such as 0.2 mm, 0.25 mm, etc.

In this embodiment, the second guide 3 may be a film made of rubber, plastic, silicone, etc., and the thickness of the second guide 3 is also preferably less than 0.1 mm, for example, selected between 0.1 mm and 0.01 mm. In other embodiments, the thickness may be increased or decreased as appropriate, as permitted, such as 0.2 mm, 0.25 mm, etc. Thus, the second guide 3 does not substantially increase the outer diameter of the cartridge 1, nor does it increase the difficulty of the cartridge 1 entering and removing from the tissue. The second guide 3 may be an elastic member, and when the second guide 3 is sleeved on the outer side of the nail barrel 1, the elastic member is in an expanded state.

In other alternative embodiments, the first guide member 2 and the second guide member 3 may be made of a flexible fabric, such as a woven fabric, a knitted fabric, or the like, the fabric may be made of a rayon material or a spun yarn obtained by a polymer extrusion method, or the like, and the first guide member 2 and the second guide member 3 are preferably elastic fabrics.

In this embodiment, the outer side walls of the first and

second guides

2, 3 are at least partially lubricious, or the outer side walls of the first and

second guides

2, 3 are at least partially coated with a lubricious layer. The lubricating layer may be pre-coated on the outer side walls of the first guide 2 and the second guide 3, and then the first guide 2 and the second guide 3 are mounted on the cartridge assembly, or the lubricating layer may be coated on the surfaces of the first guide 2 and the second guide 3 after the first guide 2 and the second guide 3 are mounted on the cartridge assembly. The lubricating layer may further improve the guiding action of the first guide 2 and the second guide 3, reducing the friction between the guides and the inner wall of the tissue. The lubricant layer may be a water-soluble lubricant, an oil-based lubricant, or the like, which is known in the art, for example, a hydrophilic coating is applied to the outer side surfaces of the first guide 2 and the second guide 3, and the surfaces of the first guide 2 and the second guide 3 are dipped in water before use, which becomes very lubricant, and this technique has been widely used in the field of surgery.

As shown in FIGS. 3 and 4, the cartridge module further comprises an anvil pull rod 5 at least partially located inside the cartridge 1, and a distal side 51 of the anvil pull rod 5 is provided with a puncturing part. In the utility model, the state of the nail anvil pull rod 5 can be divided into two types: an initial state and an operating state. As shown in fig. 3, in the initial state, the puncturing part of the anvil pull rod 5 is located inside the cartridge 1, the first end 21 of the guide 2 is sleeved outside the cartridge 1, the second end 22 of the guide 2 is sleeved on the puncturing part of the anvil pull rod 5, and the second end 22 of the guide 2 is in the expanded state to clamp the puncturing part of the anvil pull rod 5 in the initial state. As shown in fig. 4, when the cartridge module reaches the surgical position, the knob of the stapler is rotated to move the anvil pull rod 5 toward the distal end side, and the cartridge module enters a working state, in which the distal end side 51 of the anvil pull rod 5 protrudes out of the distal end side of the cartridge 1 to reach a state of being capable of being butted, and at this time, the first guide 2 is not removed from the cartridge module 1, and at this time, the second end 22 of the first guide 2 is located at the distal end side of the puncturing portion of the anvil pull rod 5.

When the anvil pull rod 5 is in the working state, the puncturing part of the anvil pull rod 5 drives the second end 22 of the first guide 2 to puncture the tissue and expose the tissue, and at this time, a pulling force toward the distal side direction is applied to the second end 22 of the first guide 2, so that the first guide 2 can be separated from the cartridge 1 and the anvil pull rod 5, and the state shown in fig. 5 is entered. At this point, the anvil pull rod 5 can be docked with the anvil assembly, thanks to the absence of the blocking of the first guide 2, and the firing of the stapler can then be carried out.

In this embodiment, the second guide 3 may be detachably sleeved outside the cartridge 1. When the second guide 3 is not installed on the outer side of the nail barrel 1, the second guide 3 can be of a simple hollow cylindrical structure, and the production process is simpler. Before the operation, the second guide 3 and the first guide 2 are installed together on the outer side of the cartridge 1, and the first end 21 of the first guide 2 and the second guide 3 are both in an expanded state to improve the fitting strength with the cartridge 1. After the second guide 3 is removed from the tissue together with the cartridge 1 after the procedure is completed, the second guide 3 can be removed from the cartridge 1.

In this embodiment, in order to avoid the influence of the second guide 3 on the visibility of the window 14, a second opening 33 may be further provided at a position of the second guide 3 corresponding to the window 14, and a distance from a distal side surface of the second opening 33 to the distal end side of the cartridge 1 is larger than a distance from a distal side surface 141 of the window 14 to the distal end side of the cartridge 1, so as to ensure that the second guide 3 can cover the distal side surface of the window 14.

As shown in fig. 1, the outer diameter of the first tubular portion 11 is larger than that of the second tubular portion 13, and the outer surface of the connecting portion 12 is a smooth transition curved surface. In order to better adapt to the structure of the outside of the cartridge 1, when the second guide 3 is sleeved on the outside of the cartridge 1, since the distal end side 31 of the second guide 3 is located on the outside of the first tubular part 11, the proximal end side 32 of the second guide 3 is located on the outside of the connecting part 12, and the inner diameter of the distal end side 31 of the second guide 3 is larger than the inner diameter of the proximal end side 32 of the second guide 3, the second guide 3 can be ensured to be better attached to the outer side surface of the cartridge 1, and the cartridge 1 can be more smoothly taken out from the tissue.

As shown in fig. 6, in this embodiment, the length of the first guide member 2 may be further increased, the first end 21 of the first guide member 2 has an overlapping region with the distal end side 31 of the second guide member 3, and the first end 21 of the first guide member 2 covers the outer side surface of the distal end side 31 of the second guide member 3 at the overlapping region. Therefore, the matching strength of the first guide 2 and the second guide 3 and the nail barrel 1 can be enhanced through the matching of the first end 21 of the first guide 2 and the distal end side 31 of the second guide 3, and the nail cartridge assembly is prevented from falling off accidentally before reaching the operation position. The outer surface of the portion of the second guide 3 covered by the first guide 2 is not coated with a lubricating layer.

In this embodiment, as shown in fig. 7 and 8, a connecting rib 6 may be further disposed between the first end 21 of the first guide 2 and the distal end side 31 of the second guide 3, so as to enhance the fitting strength of the first guide 2 and the second guide 3 with the cartridge 1, and prevent the cartridge assembly from falling off accidentally before reaching the surgical site. When the first guide 2 is subjected to an external force in the direction of the distal side, the first guide 2 can move towards the distal side to break the connecting ribs 6, so that the second guide 3 can be left on the outer side surface of the cartridge 1 when the first guide 2 is removed.

As shown in fig. 9 to 13, it is a schematic structural diagram of the guiding assembly and the cartridge assembly according to the second embodiment of the present invention. This embodiment differs from the first embodiment in that the second end 22 of the first guide 2 is provided with a first opening 23. In the initial state, as shown in fig. 9, the first guide 2 is not fixedly connected to the anvil pull rod 5, and the diameter of the first opening 23 is smaller than the diameter of the puncturing part of the distal side 51 of the anvil pull rod 5. As shown in fig. 10, when the staple cartridge assembly moves to the surgical position, in the process that the anvil pull rod 5 moves to protrude from the distal end side of the staple cartridge 1 toward the distal end side of the stapler, the anvil pull rod 5 is inserted into the first opening 23 to protrude from the first guide 2 to pierce tissue, and the anvil pull rod 5 opens the first opening 23, so that the first opening 23 clamps the anvil pull rod 5, and the anvil pull rod 5 drives the second end 22 of the first guide 2 to be exposed out of the tissue, thereby facilitating the operation and removal of the first guide 2 by the surgeon. In this embodiment, the portion of the first guide 2 at the distal end of the cartridge 1 comprises a tapered portion having a diameter that increases from its side near the second end 22 of the first guide 2 to its side near the first end 21 of the first guide 2 to form a tapered structure that better serves to guide the cartridge assembly into the tissue. In other alternative embodiments, it is also possible to arrange the first guide 2 such that the diameters of the first end 21 and the second end 22 are substantially the same, and this is within the scope of the present invention. In the state of fig. 10, the first guide 2 is removed by pulling it in the distal direction, and the structure shown in fig. 5 is obtained. As shown in fig. 11 and 12, the state of the first guide 2 is shown when it is fitted to the distal end side of the cartridge 1 and when it is detached from the cartridge 1, respectively, the first end 21 of the first guide 2 is elastically expanded when it is fitted to the outside of the cartridge 1, and the first end 21 of the first guide 2 is contracted to a state before the expansion after it is detached from the cartridge 1, so that it can be more easily taken out from the tissue. As shown in fig. 13, the second guide 2 may be a simple hollow cylindrical structure when not fitted outside the cartridge 1, and the manufacturing process is more convenient, and the second guide 2 is preferably an elastic structure which is outwardly spread to fit outside the cartridge 1 when mounted outside the cartridge 1.

As shown in fig. 14 and 15, the second guide 3 may also be unfolded into a one-piece structure, and two opposite sides of the one-piece structure are provided with positioning portions 34, and when the second guide 3 is sleeved outside the cartridge 1, the two opposite sides of the one-piece structure are connected by the positioning portions 34. In this embodiment, the second guide 3 may not have elasticity, and the fixing of the second guide 3 to the outside of the cartridge 1 is achieved by the positioning part 34. In this embodiment, the positioning portion 34 includes concave and convex edges disposed on two opposite sides of the one-piece structure, and when the second guide 3 is sleeved on the outside of the nail barrel 1, the concave and convex edges of the two opposite sides of the one-piece structure are engaged with each other. In other alternative embodiments, the positioning portion 34 may also adopt a connecting structure such as a snap.

Fig. 16 is a schematic structural view of the cartridge assembly to which the guide assembly of the third embodiment of the present invention is applied. This embodiment differs from the first embodiment in that: the length of the second guide 3 is longer and the proximal side 32 of the second guide 3 covers the proximal side 142 of the viewing window 14. In this embodiment, in order to avoid the influence of the second guide 3 on the visibility of the window 14, a second opening 33 is provided at a position of the second guide 3 corresponding to the window 14, and the distance from the distal side surface of the second opening 33 to the distal end side of the cartridge 1 is larger than the distance from the distal side surface 141 of the window 14 to the distal end side of the cartridge 1, so that it is ensured that the second guide 3 can cover the distal side surface 141 of the window 14.

As shown in fig. 1, the outer diameter of the first tubular portion 11 is larger than that of the second tubular portion 13, and the outer surface of the connecting portion 12 is a smooth transition curved surface. In order to better adapt to the structure of the outside of the cartridge 1, when the second guide 3 is sleeved on the outside of the cartridge 1, since the distal end side 31 of the second guide 3 is located on the outside of the first tubular portion 11, the proximal end side 32 of the second guide 3 is located on the outside of the second tubular portion 13, and the inner diameter of the distal end side 31 of the second guide 3 is larger than the inner diameter of the proximal end side 32 of the second guide 3, the second guide 3 can be ensured to be better attached to the outer side surface of the cartridge 1, and the cartridge 1 can be more smoothly taken out from the tissue.

Fig. 17 is a schematic structural view of the cartridge module to which the guide assembly according to the fourth embodiment of the present invention is applied. In this embodiment, the inner side surface of the second guide 3 is further provided with a protrusion, the protrusion is a protruding strip 41, the protruding strip 41 preferably extends along the circumferential direction of the nail barrel 1, but the present invention is not limited thereto, and in other alternative embodiments, the protruding strip 41 may also extend along the axial direction of the nail barrel 1, or form a certain included angle with the axial direction, etc.

Fig. 18 is a schematic structural view of a cartridge assembly to which the guide assembly of the fifth embodiment of the present invention is applied. In this embodiment, the inner side surface of the second guide 3 is further provided with a projection, which is a boss 42. While fig. 18 shows a circular boss, in alternative embodiments, the boss 42 may take other shapes and arrangements and be within the scope of the present invention.

The guide component provided by the utility model can be independently placed without being arranged on the nail tube part of the anastomat before being used, and can be selectively arranged by a user according to the requirement, the operation is simpler, only the first guide part and the second guide part need to be arranged on the outer side of the nail tube, and in some embodiments, the second end of the first guide part needs to be arranged at the far end of the nail anvil pull rod; can also be directly arranged on the nail barrel part of the anastomat without being arranged by the user. Meanwhile, the first guide piece and the second guide piece are elastic, so that the anastomats of multiple models can be matched, and the universal matching property in production and use is good.

To sum up, through adopting the utility model discloses a guide assembly, can guide nail storehouse subassembly to get into the operation site well, protect the mucosa layer of stub tissue and tissue, and after nail storehouse subassembly reachd the operation site, exert the external force towards distal end side direction to first guide, can conveniently remove the guide part from distal end side at least partially, operation easy operation, can not increase extra burden for the operation process, can not influence the operation effect because of the existence of guide yet, and when taking out nail storehouse subassembly from the tissue after the operation is accomplished, the second guide still can protect the mucosa layer of tissue, prevent to cause the damage to the tissue mucosa, use experience has been promoted.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The guide assembly is characterized by being used for a nail bin assembly of a circular tube type anastomat, the nail bin assembly comprises a nail barrel, and the side surface of the nail barrel is provided with at least one window;

the guide assembly includes:

2. The guide assembly of claim 1, wherein the first guide and the second guide are each flexible material members.

3. The guide assembly of claim 1, wherein the first end of the first guide includes a resilient portion that is in an expanded state when the resilient portion is disposed around the cartridge.

4. The guide assembly of claim 1, wherein the second guide member is an elastic member, and the elastic member is in an expanded state when the second guide member is sleeved outside the cartridge.

5. The guide assembly of claim 1, wherein a connecting rib is disposed between the first end of the first guide and the distal side of the second guide, wherein the first guide is movable distally to break the connecting rib when the first guide is subjected to an external force in a distal direction.

6. The guide assembly of claim 1, wherein there is an overlap region between the first end of the first guide and the distal side of the second guide, and the first end of the first guide covers an outer side of the distal side of the second guide at the overlap region.

7. Guide assembly according to claim 1, wherein the thickness of the first guide is less than 0.1 mm and/or the thickness of the second guide is less than 0.1 mm.

8. The guide assembly of claim 1, further comprising an anvil pull rod at least partially disposed within the cartridge, wherein a distal side of the anvil pull rod defines a puncturing portion, wherein the second end of the first guide member is closed, and wherein the second end of the first guide member is disposed distal of the puncturing portion when the anvil pull rod moves toward the distal of the stapler to protrude beyond the distal of the cartridge.

9. The guide assembly of claim 1, further comprising an anvil pull rod at least partially disposed within the cartridge, wherein a distal end of the anvil pull rod is provided with a puncturing portion, the second end of the first guide member is provided with an opening, the puncturing portion of the anvil pull rod is inserted into the opening when the anvil pull rod moves toward the distal end of the stapler to protrude from the distal end of the cartridge, and the second end of the first guide member terminates at the puncturing portion.

10. Guide assembly according to claim 1, wherein the outer surface of the first guide is at least partially coated with a lubricating layer and/or the surface of the second guide is at least partially coated with a lubricating layer.

11. A circular tube-type stapler, characterized in that it comprises a guide assembly according to any one of claims 1 to 10.