CN212382680U

CN212382680U - Guide piece and circular tube type anastomat

Info

Publication number: CN212382680U
Application number: CN202020855282.4U
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 piece and circular tube type anastomat, the guide piece is used for guiding the nail storehouse subassembly of circular tube type anastomat to get into the operation position, the guide piece includes: a first guide portion; the second guide part is detachably fixed on the far end side of the nail bin assembly through the first guide part, and when the second guide part is subjected to external force towards the far end side direction, the second guide part can move towards the far end side to be separated from the nail bin assembly. The utility model provides a guide piece for circular tube type anastomat sets up the distal end side at nail storehouse subassembly with the guide piece, can guide nail storehouse subassembly well and get into the operation position to behind nail storehouse subassembly reachs the operation position, apply the external force towards distal end side direction to the guide piece, can conveniently remove the guide piece part at least from distal end side, can not increase extra burden for the operation process, improved and used experience.

Description

Guide piece and circular tube type anastomat

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to guide piece 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.

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 piece and circular tube type anastomat, the guide piece can guide nail storehouse subassembly to get into the operation site well to can follow the convenient removal of distal end side.

The embodiment of the utility model provides a guide for the nail storehouse subassembly of circular tube type anastomat, the guide includes:

a first guide portion;

the second guide part is detachably fixed on the far end side of the nail bin assembly through the first guide part, and when the second guide part is subjected to external force towards the far end side direction, the second guide part can move towards the far end side to be separated from the nail bin assembly.

Optionally, the first guide portion is detachably fixed to the cartridge assembly, and when the second guide portion is subjected to an external force in a distal direction, the first guide portion may be detached from the cartridge assembly as the second guide portion moves in the distal direction.

Alternatively, the distal end side of the first guide portion and the second guide portion are connected by a separation line, and when the second guide portion receives an external force in a distal end direction, the second guide portion and the first guide portion may be separated at the separation line.

Optionally, the outer side wall of the guide is at least partially coated with a lubricating layer.

Optionally, the staple cartridge assembly comprises a staple cartridge, the first guide part is a tubular part surrounding the outer side wall of the staple cartridge, and the distal end side of the first guide part is connected with the first end of the second guide part.

Optionally, the first guide portion is at least partially elastic, and when the elastic portion of the first guide portion surrounds the outer side wall of the nail barrel, the elastic portion is in an expanded state.

Optionally, the inner side wall of the first guide portion is provided with at least one protrusion.

Optionally, the protrusion of the inner side wall of the first guide portion includes a plurality of protrusions, and the plurality of protrusions are arranged along the axial direction of the stapler; or

The protrusion of the inner side wall of the first guide part comprises at least one convex strip, and each convex strip extends along the axial direction of the anastomat.

Optionally, the second guide portion is a deformable flexible portion, and the second guide portion includes a tapered portion having a diameter that increases in order from a side thereof near the second end of the second guide portion to a side thereof near the first end of the second guide portion.

Optionally, the first guide portion and the second guide portion are integrally molded.

Optionally, the guide has a thickness of less than 0.1 mm.

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

The utility model provides a guide and circular tube type anastomat has following advantage:

the utility model provides a guide piece for circular tube type anastomat, set up the distal end side at nail storehouse subassembly with the guide piece, can guide nail storehouse subassembly well and get into the operation position, protect the mucosa layer of stub tissue and tissue, and after nail storehouse subassembly reachs the operation position, apply the external force towards distal end side direction to the guide piece, can conveniently remove the guide piece part at least from distal end side, operation easy operation, can not increase extra burden for the operation process, can not influence the operation effect because of the existence of guide piece yet, use experience is improved.

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 nail cartridge assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of the guide of the first embodiment of the present invention disposed on the cartridge assembly;

FIG. 3 is a cross-sectional view of the first embodiment of the present invention showing the guide engaged with the cartridge assembly in an initial state;

FIG. 4 is a cross-sectional view of the first embodiment of the present invention with the anvil pull rod protruding from the staple cartridge after reaching the surgical site;

fig. 5 is a schematic structural view of a guide member according to a first embodiment of the present invention;

FIG. 6 is a schematic view of the first embodiment of the present invention showing the guide member and the cartridge assembly after the first guide portion is extended;

FIG. 7 is a schematic view of the first embodiment of the present invention with the guide member engaged with the cartridge assembly after the first guide portion has been further extended;

FIG. 8 is a cross-sectional view of a second embodiment of the present invention showing the guide engaged with the cartridge assembly in an initial state;

FIG. 9 is a cross-sectional view of the second embodiment of the present invention with the anvil pull rod protruding from the cartridge after reaching the surgical site;

fig. 10 is a schematic structural view of a guide member according to a second embodiment of the present invention;

FIG. 11 is a schematic view of the guide member engaged with the magazine assembly in an initial state according to a third embodiment of the present invention;

FIG. 12 is a cross-sectional view of a third embodiment of the present invention showing the engagement of the guide with the cartridge assembly in an initial state;

FIG. 13 is a schematic view of a fourth embodiment of the present invention showing the engagement of a guide member with a cartridge assembly;

fig. 14 is a schematic structural view of the fourth embodiment of the present invention in which the second guide portion and the first guide portion are separated;

FIG. 15 is a schematic view of a fifth embodiment of the present invention showing the engagement of a guide member with a cartridge assembly;

FIG. 16 is a schematic view of a sixth embodiment of the present invention showing the engagement of a guide member with a cartridge assembly;

fig. 17 is a schematic structural view of a guide according to a seventh embodiment of the present invention;

fig. 18 is a schematic structural view of a guide according to an eighth embodiment of the present invention;

fig. 19 is a schematic structural view of a guide according to a ninth embodiment of the present invention;

fig. 20 and 21 are schematic views showing two different kinds of projections provided in a guide according to a tenth embodiment of the present invention;

fig. 22 is a schematic structural view of a guide according to an eleventh embodiment of the present invention;

FIG. 23 is a schematic view of a guide of a twelfth embodiment of the present invention engaged with a cartridge assembly;

fig. 24 is a schematic structural view of a guide according to a twelfth embodiment of the present invention.

Reference numerals:

1 first end of the second guide portion of the cartridge assembly 221

11 second end of the second guide of the staple cartridge 222

111 cartridge distal side 23 first opening

112 proximal side 24 second opening of the cartridge

113 third opening 25 line of separation

12 nail anvil pull rod 26 step surface

Distal side 27 telescopic part of 121 anvil pull rod

13 tapered part of magazine surface 28

14 window 3 connecting bar

2 guide 4 support bar

21 first guide 5 water-soluble support

211 distal side 51 through hole of first guide

212 proximal side 61 projection of the first guide

213 first protrusion of insert 62

22 second guide portion 63 and second rib

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 piece for circular tube type anastomat and circular tube type anastomat comprising the guide piece. 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. 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 is used to better guide the cartridge assembly into a surgical site. Specifically, the guide includes: the second guide part is detachably fixed on the far end side of the nail bin assembly through the first guide part, and when the second guide part is subjected to an external force towards the far end side direction, the second guide part can move towards the far end side to be integrally separated from the nail bin assembly.

Thus, the guide member can better guide the movement of the cartridge assembly after the cartridge assembly enters the tissue. After the cartridge assembly reaches the surgical site, the second guide portion of the guide member is at least partially exposed outside the tissue, so that a surgeon can directly use a tool such as a surgical forceps to clamp the second guide portion and apply a pulling force to the distal direction of the stapler, and the second guide portion is separated from the cartridge assembly, so that the second guide portion can be pulled out of the tissue.

Here, the second guide portion is detachably fixed to the distal end side of the cartridge assembly through the first guide portion in two cases: the first type is that a first guide part and a second guide part are fixedly connected, the first guide part is detachably fixed at the far end side of the nail box assembly, when a doctor clamps the second guide part and pulls the second guide part towards the far end side, the second guide part and the first guide part are separated from the nail box assembly, and therefore the second guide part and the first guide part can be pulled out from tissues. The second type is that the first guide part is fixedly connected with the nail bin assembly, the second guide part is detachably connected with the first guide part, when a doctor clamps the second guide part and pulls the second guide part towards the far end side, the second guide part is separated from the first guide part, the second guide part is pulled out, and the first guide part is remained on the nail bin assembly.

The structure of the guide 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, the structure of the guide member and the cartridge module according to the first embodiment of the present invention is schematically illustrated. In this embodiment, the guide 2 includes a first guide portion 21 and a second guide portion 22. The first guide portion 21 is detachably fixed to the magazine assembly 1, the first end 221 of the second guide portion 22 is fixedly connected to the distal end side of the first guide portion 21, when the second guide portion 22 receives an external force in the distal direction, the second guide portion 22 can move in the distal direction to be integrally separated from the magazine assembly 1, and the first guide portion 21 can move in the distal direction along with the second guide portion 22 to be separated from the magazine assembly 1. From this, when nail storehouse subassembly 1 gets into tissue inside, guide 2 can provide fine guide effect for nail storehouse subassembly 1, after nail storehouse subassembly 1 reaches the operation position, second guide portion 22 exposes outside the tissue at least partially, the doctor can directly use tools such as surgical forceps to carry second guide portion 22, exert pulling force to the distal end side direction of anastomat, second guide portion 22 and first guide portion 21 separate with nail storehouse subassembly 1, thereby can pull out second guide portion 22 from organizing very conveniently, can not increase extra burden for the operation process, can not influence the operation effect because of the existence of guide yet, use experience has been improved.

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 side 111 is the upper side and the proximal side 112 is the lower side of the cartridge 11. In the perspective view of fig. 4, the first guide portion 21 has a distal end side 211 on the upper side and a proximal end side 212 on 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 outer side wall of the guide 2 is at least partially lubricious, or the outer side wall of the guide 2 is at least partially coated with a lubricious layer. The lubricating layer can be pre-coated on the outer side wall of the guide 2, and then the guide 2 is installed on the cartridge component 1, or the lubricating layer can be coated on the surface of the guide 2 after the guide 2 is installed on the cartridge component 1. The lubricating layer may further improve the guiding action of the guide 2. The lubricating 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 surface of the guide member 2, and the surface of the guide member 2 is dipped in water before use, which becomes very lubricating, and this technique has been widely used in the field of surgery.

As shown in FIGS. 3-5, in this embodiment, the cartridge module 1 includes a cartridge 11 and an anvil pull rod 12 located inside the cartridge 11. The first guide portion 21 is a tubular portion surrounding the outer side wall of the cartridge 11, and the distal end side 211 of the first guide portion 21 is connected to the first end 221 of the second guide portion 22. In this embodiment, the guide 2 is preferably made of a thin film to reduce the outer diameter of the cartridge assembly 1 so as not to expand and damage the outer diameter of the tissue to be stapled; while the guide 2 will easily be pulled out of the tissue when subjected to external forces. In this embodiment, the guide 2 has a thickness of 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 other alternative embodiments, the thickness of the guide 2 may also be in other value ranges, without being limited thereto. Thus, the guide 2 has little effect on the outer diameter of the cartridge 11, and the difficulty of the cartridge 11 entering the tissue is not increased by the addition of the guide 2. In other alternative embodiments, other connection manners may be adopted between the first guide portion 21 and the nail barrel 11, for example, by providing a tab on the first guide portion 21 to be inserted into a hole on the surface of the nail barrel 11, or providing an opening on the first guide portion 21, providing a connecting member on the surface of the nail barrel 11 to pass through the opening, etc., which all fall within the protection scope of the present invention.

Further, the first guiding portion 21 may be at least partially elastic, for example, a film made of rubber, plastic, silicon, etc., and when the elastic portion of the first guiding portion 21 surrounds the outer sidewall of the nail barrel 11, the elastic portion is in an expanded state, so that the nail barrel 11 is tightly clamped by the elastic portion to form a tighter fit with the nail barrel 11, thereby ensuring that the nail cartridge assembly 1 cannot be detached before reaching the surgical site. In other alternative embodiments, the first guide portion 21 and the second guide portion 22 may be made of a flexible fabric, such as a woven fabric, a knitted fabric, or the like, the material of the fabric may be a rayon material or a spun yarn obtained by a polymer extrusion method, or the like, and the first guide portion 21 and the second guide portion 22 are preferably elastic fabrics.

Further, the first guide portion 21 and the second guide portion 22 may be at least partially flexibly deformable, and when the guide member 2 is detached from the tissue, the guide member 2 is deformed to reduce the diameter, and is more easily removed without damaging the surrounding tissue.

In this embodiment, the second end 222 of the second guide portion 22 is removably coupled to the anvil pull rod 12. The second end 222 of the second guide portion 22 is an unopened closed end. In the utility model, the state of the nail anvil pull rod 12 can be divided into two types: an initial state and an operating state. As shown in fig. 3, the distal end 121 of the anvil pull rod 12 has a puncturing part, and in the initial state, the puncturing part of the anvil pull rod 12 is located inside the cartridge 11, and the first guiding part 21 of the guiding member 2 is sleeved outside the cartridge 11. In the operating state, as shown in fig. 4, the distal end 121 of the anvil pull rod 12 protrudes beyond the distal end of the cartridge 11 to reach a state of being able to be docked, and the guide 2 has not been removed from the cartridge assembly 1, at which time the second end 222 of the second guide 22 is located at the distal end of the penetrating portion of the anvil pull rod 12. In this embodiment, in the working state, the first guide portion 21 is still sleeved outside the nail barrel 11.

As shown in fig. 3, in this embodiment, in the initial state, the second end 222 of the second guide 22 is also located inside the cartridge 11, and the second end 222 of the second guide 22 is located on the proximal side of the first end 221. As shown in fig. 4, when the anvil pull rod 12 moves to the distal end side (along the direction S in fig. 4) to protrude from the distal end side of the cartridge 11 from the initial state to the working state, the anvil pull rod 12 drives the second end 222 of the second guide portion 22 to move to the distal end side of the first end 221 of the guide member 2, and drives the second guide portion 22 to pass through the tissue together while the anvil pull rod 12 punctures the tissue, so that the second guide portion 22 is at least partially exposed out of the tissue. In the working state, when an external force towards the far end side is applied to the second guiding part 22, the guiding part 2 can be detached from the cartridge component 1 and removed, and the second guiding part 22 can be made of a flexible deformable material, can be conveniently removed from the tissue, and can also be at least partially elastic.

In this embodiment, the first guide portion 21 and the second guide portion 22 are integrally formed, and can be made of elastic film with uniform thickness, or can be provided with different thicknesses at different positions, for example, the second end 222 of the second guide portion 22 can be thickened, that is, the thickness of the second end 222 of the second guide portion 22 is greater than that of the first end 221 of the second guide portion 22, so as to avoid puncturing the second end 222 of the second guide portion 22 when the anvil pull rod 12 moves to the distal side. The second end 222 of the second guide 22 is shaped to facilitate piercing of the tissue distal tip. In this embodiment, the second end 222 of the second guide portion 2 is preferably shaped to match the shape of the anvil pull rod 12 for better fit, and the thickened second end 222 is also a clamping portion, which provides convenience for the surgeon to clamp the guide.

In this embodiment, as shown in fig. 6, the length of the first guide portion 21 in the axial direction of the stapler may be further extended, that is, the distance between the distal end side 211 and the proximal end side 212 of the first guide portion 21 is extended, so as to achieve a closer fit of the first guide portion 21 with the cartridge 11. Further, as shown in fig. 7, in this embodiment, the first guide portion 21 may be further extended so that the proximal end side 212 thereof reaches the position of the viewing window 14 of the cartridge 11 or further extended so as to reach the proximal end side of the viewing window 14. The proximal side 212 of the first guide portion 21 is spaced further from the distal side 111 of the cartridge 11 than the distal side of the viewing window 14 is spaced further from the distal side 111 of the cartridge 11. In order to avoid the first guiding portion 21 covering the viewing window 14 from affecting the operation of the doctor, a second opening 24 may be opened at a position of the first guiding portion 21 corresponding to the viewing window 14.

In this embodiment, the second guide portion 22 includes a tapered portion 28, and the diameter of the tapered portion 28 increases from the side thereof near the second end 222 of the second guide portion 22 to the side thereof near the first end 221 of the second guide portion 22 to form a tapered structure, so that the guide member 2 can be easily stored, for example, when not in use, i.e., when the first guide portion 21 is not mounted on the outside of the cartridge 11, the guide member is rolled from the proximal end side 212 of the first guide portion 21 to the second end 222 of the second guide portion 22 until the flat structure is similar to a plane, thereby greatly reducing the storage space. In other alternative embodiments, the second guide portion 22 may be configured such that the diameters of the first end 221 and the second end 222 are substantially the same, and the present invention is also within the protection scope of the present invention.

As shown in fig. 8-10, the structure of the guide piece and the cartridge assembly according to the second embodiment of the present invention is schematically illustrated. The difference between this embodiment and the first embodiment is that the second end 222 of the second guiding portion 22 is opened with a first opening 23. The second end 222 of the second guide portion 22 grips the anvil pull rod 12 at the first opening 23. I.e., second guide portion 22 is resilient at least at first opening 23, the diameter of first opening 23 is smaller than the diameter of the piercing portion of distal side 121 of anvil pull rod 12 when guide 2 is not mounted to cartridge assembly 1, and second guide portion 22 is at least partially flexibly deformable. In the initial state, as shown in fig. 8, the second end 222 of the second guide portion 22 is located inside the cartridge 11 along with the puncturing portion of the anvil pull rod 12, and when the anvil pull rod 12 moves to a distal end side (along the direction S in fig. 9) to protrude from the cartridge 11, that is, as shown in fig. 9, when the initial state enters the working state, the anvil pull rod 12 drives the second end 222 of the second guide portion 22 to move to the distal end side of the cartridge 11, at this time, the puncturing portion of the anvil pull rod 12 is inserted into the first opening 23, and the second end 222 of the second guide portion 22 is stopped at the puncturing portion, and when the anvil pull rod 12 moves to a distal end side to puncture tissue, the second end 222 of the second guide portion 22 is also exposed. In this embodiment, in the working state, when an external force toward the distal side is applied to the second guide portion 22, the guide 2 may be detached from the cartridge assembly 1 and removed.

Fig. 11 and 12 are schematic views showing the structure of the guide and the cartridge assembly according to the third embodiment of the present invention. This embodiment differs from the second embodiment in that in the initial state, the second guide portion 22 is not fixedly connected to the anvil pull rod 12, and the diameter of the first opening 23 is smaller than the diameter of the puncturing portion of the distal side 121 of the anvil pull rod 12. When the nail cartridge assembly 1 moves to the surgical position, in the process that the anvil pull rod 12 moves to protrude from the distal end side of the stapler to protrude from the distal end side of the nail barrel 11, the anvil pull rod 12 is inserted into the first opening 23 to protrude from the second guide portion 22 to puncture tissue, and the anvil pull rod 12 supports the first opening 23, so that the first opening 23 clamps the anvil pull rod 12, and the anvil pull rod 12 drives the second guide portion 22 to at least partially expose out of the tissue, thereby facilitating the operation of the removing guide 2 by the doctor. In this embodiment, the second guide portion 22 includes a tapered portion 28, and the tapered portion 28 has a diameter that increases from a side thereof near the second end 222 of the second guide portion 22 to a side thereof near the first end 221 of the second guide portion 22 to form a tapered structure, so as to form a tapered structure, which can better guide the cartridge assembly 1 into the tissue. In other alternative embodiments, the second guide portion 22 may be configured such that the diameters of the first end 221 and the second end 222 are substantially the same, and the present invention is also within the protection scope of the present invention.

In another alternative embodiment, it is also possible to arrange the second end 222 of the second guide portion 22 to be closed, i.e. not provided with an opening as in the first embodiment, while in the initial state of the anvil pull rod 2, the second end 222 of the second guide portion 22 is not fixedly connected to the anvil pull rod 2, and when entering the working state from the initial state, i.e. during the movement of the anvil pull rod 12 towards the distal end side of the stapler to protrude from the distal end side of the cartridge 11, the anvil pull rod 12 enters the interior of the second end 222 of the second guide portion 22 to pierce the tissue together with the second guide portion 22 and to make the second guide portion 22 at least partially exposed to the tissue. In this embodiment, in the working state, when an external force toward the distal side is applied to the second guide portion 22, the guide 2 may be detached from the cartridge assembly 1 and removed.

Fig. 13 and 14 are schematic views showing the structure of the guide and the cartridge assembly according to the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that the first guide portion 21 and the second guide portion 22 are not integrally provided, the first guide portion 21 is fixed to the outer side surface of the cartridge 11, and the second guide portion 22 is detachably connected to the first guide portion 21. Specifically, the distal end side of the first guide portion 21 and the second guide portion 22 are connected by a separation line 25, as shown in fig. 14, when the second guide portion 22 is subjected to an external force toward the distal end side (along the direction S in fig. 14), the second guide portion 22 can be separated from the first guide portion 21 at the separation line 25, the second guide portion 22 is pulled out of the tissue, and the first guide portion 21 remains outside the cartridge assembly 1, so that the position of the first guide portion 21 does not affect staple forming and cutter cutting, and the surgical effect is not affected. The separation line 25 may be provided in a zigzag shape as shown in fig. 13, or may be provided in other matching manners.

Fig. 15 is a schematic view of the structure of the guide member and the cartridge assembly according to the fifth embodiment of the present invention. The embodiment is different from the fourth embodiment in that the separation line 25 is a straight line, and the connecting rib 3 is disposed at the separation line 25 of the first guide portion 21 and the second guide portion 22, the connecting rib 3 may be a breakable rib, for example, made of a plastic material, a rubber material, a silicone material, etc., when the second guide portion 22 is subjected to an external force toward the distal side direction (along the S direction in fig. 15), the connecting rib 3 is broken, the second guide portion 22 can be separated from the first guide portion 21 at the separation line 25, the second guide portion 22 is pulled out of the tissue, and the first guide portion 21 remains outside the cartridge assembly 1, because the position of the first guide portion 21 does not affect staple forming and cutter cutting, and does not affect the surgical effect.

Fig. 16 is a schematic view of a guide and a cartridge assembly according to a sixth embodiment of the present invention. This embodiment is different from the third embodiment in that a support is provided inside the second guide portion 22, and in an initial state, the second end 222 of the second guide portion 22 is held by the support on the distal end side of the first end 221 of the second guide portion 22. The support member 5 includes a plurality of support rods 4, and each support rod 4 extends from the second end 222 to the first end 221 of the second guide portion 22 to form an umbrella structure. When the second guide portion 22 is subjected to an external force toward the distal end side, the proximal end sides of the respective support rods 5 in the umbrella-shaped structure formed by the support rods 4 are gathered together, so that the diameter of the second guide portion 22 at the first end 221 is reduced, and the second guide portion 22 is easily removed from the tissue. Fig. 16 shows the case where the second guide portion 22 includes the tapered portion 28, and the support rod 4 is disposed on the tapered portion 28, but in other alternative embodiments, the second guide portion 22 may have no diameter change, i.e., the tapered portion 28 is not included, and the present invention also falls within the protection scope of the present invention.

Fig. 17 is a schematic view of a guide and a cartridge assembly according to a seventh embodiment of the present invention. The difference between this embodiment and the sixth embodiment is that the support member inside the second guide portion 22 is a water-soluble support member 5 made of water-soluble material, a through hole 51 communicating with the first opening 23 is formed in the water-soluble support member 5, and when the anvil pull rod 12 enters the working state from the initial state, i.e. when the anvil pull rod 12 moves to the distal end side of the stapler to protrude from the distal end side of the cartridge 11, the anvil pull rod 12 is inserted into the through hole 51 and the first opening 23 to protrude from the distal end side of the cartridge 11 to puncture tissue. The water-soluble support member 5 gradually dissolves and disappears after contacting with the liquid to lose the supporting function, so that the second guide portion 22 and the first guide portion 21 after losing the support can be easily removed from the tissue by applying an external force toward the distal end side to the second guide portion 22 in the operating state. The water-soluble buttress 5 may be a disintegrating drug that is beneficial for healing of the stoma.

In another alternative embodiment, the water-soluble support 5 may not be provided with the through hole 51, and the second end 222 of the second guide 22 is not provided with the first opening 23. In the initial state, the guide 2 is integrally detachably fixed to the distal end side of the cartridge 11, and the penetrating part of the distal end side 121 of the anvil pull rod 12 is also located inside the cartridge 11. In this state, the cartridge assembly is introduced into the tissue, and when the cartridge assembly is moved to the surgical site, the tissue is pierced by the guide 2, and the guide 2 is at least partially extended out of the tissue, and at this time, the water-soluble support 5 can be gradually dissolved by the externally-supplied liquid. The anvil pull rod 12 can now be moved distally to the point where its piercing part protrudes from the distal end side 111 of the cartridge 11, i.e. into the operative state of the anvil pull rod 12, and the guide 2 can then be removed by applying a force directed distally to the guide 2 in the operative state. Furthermore, it is also possible to remove the guide 2 by applying an external force towards the distal side to the guide 2 after the anvil pull rod 12 is still in the initial state and the guide 2 has punctured the tissue, and then to move the anvil pull rod 12 distally to a position where its puncturing part protrudes from the distal side 111 of the cartridge 11, i.e. into the operating state of the anvil pull rod 12.

Fig. 18 is a schematic view showing a structure of the guide and the stapler according to an eighth embodiment of the present invention. The difference between this embodiment and the first embodiment is that the first end 221 of the second guide portion 22 has a diameter smaller than the outer diameter of the cartridge 11, so that the junction of the first guide portion 21 and the second guide portion 22 forms a stepped surface 26 that cooperates with the cartridge surface 13 of the cartridge module 1. The step surface 26 may further improve the fit between the first guide portion 21 and the second guide portion 22. In addition, the step surface 26 can also be applied to the structures of the other embodiments, for example, the step surface 26 at the joint is added in the embodiment of fig. 3.

Fig. 19 is a schematic view showing a structure of a ninth embodiment of the present invention, in which a guide and a stapler are engaged. This embodiment differs from the first embodiment in that the second guide portion 22 is at least partially a telescopic portion 27 which is telescopic in the axial direction of the stapler. In the process that the anvil pull rod 12 moves towards the direction of the far end side, the telescopic part 27 can better adapt to the movement of the position of the puncturing part of the anvil pull rod 12, so that the obstruction to the movement of the anvil pull rod 12 is reduced, and the movement of the anvil pull rod 12 is smoother. The expansion portion 27 may have a bellows structure. The telescopic portion 27 may also be applied to the structures of other embodiments, for example, the telescopic portion 27 may be applied to the third embodiment, in the initial state, the telescopic portion 27 may be in the contracted state, and when the initial state is entered into the working state, that is, when the anvil pull rod 12 moves to the distal end side to be matched with the first opening 23 of the second guide portion 22, the second guide portion 22 may also have the change in the axial length along with the movement of the anvil pull rod 12, so that the telescopic portion 27 is at least partially in the extended state, and the smoothness of the movement of the anvil pull rod 12 is not affected.

Fig. 20 and 21 are schematic views showing the structure of the guide and cartridge assembly according to the tenth embodiment of the present invention. This embodiment differs from the third embodiment in that at least one protrusion is provided on the inner sidewall of the first guide portion 21 to improve the engagement between the first guide portion 21 and the cartridge 11 in the initial state, and to prevent the first guide portion 21 from being disengaged from the cartridge 11 when the cartridge module 1 does not reach the surgical site. As shown in fig. 20, the protrusion may be in the form of a bump 61, and as shown in fig. 21, the protrusion may also be in the form of a first rib 62. As shown in fig. 20, the protrusion of the inner sidewall of the first guide portion 21 includes a plurality of protrusions 61, and the plurality of protrusions 61 may be arranged along the axial direction of the stapler to better guide the first guide portion 21 to be separated from the cartridge assembly 1 when receiving a pulling force in the distal direction, but the present invention is not limited thereto, and in other alternative embodiments, the protrusions 61 may also be arranged in other manners. As shown in fig. 21, the protrusion of the inner sidewall of the first guiding portion 21 includes at least one protruding strip 62, and each protruding strip 62 may extend along the axial direction of the stapler to better guide the first guiding portion 21 to be separated from the cartridge assembly 1 when receiving a pulling force in the distal direction, but the present invention is not limited thereto, and in other alternative embodiments, the protruding strip 62 may also extend along other directions.

Fig. 22 is a schematic view of the structure of the guide member and the cartridge assembly according to the eleventh embodiment of the present invention. This embodiment is different from the tenth embodiment in that, since the first guide portion 21 and the second guide portion 22 are separable, the protrusions of the inner side wall of the first guide portion 21 may be the convex second convex strips 63 extending and arranged in the circumferential direction of the cartridge 11, thereby improving the stability of the engagement of the first guide portion 21 with the cartridge 11 in the initial state when the second guide portion 22 moves to the distal side to be disengaged from the cartridge assembly 1, so that the first guide portion 21 may remain outside the cartridge 11.

Fig. 23 and 24 are schematic views showing the structure of the guide member and the cartridge assembly according to a twelfth embodiment of the present invention. This embodiment differs from the third embodiment in that: the nail barrel 11 is provided with a plurality of third openings 113, the first guide portion 21 includes a plurality of insertion pieces 213, and in an initial state, the insertion pieces 213 are inserted into the third openings 113. The insertion sheet 213 may be detachably connected to the third opening 113, and the insertion sheet 213 may be made of a flexible material, such as rubber, thin plastic, etc., so as to facilitate the detachment of the first guide portion 21 from the nail barrel 11 when the second guide portion 22 is pulled distally. In another alternative embodiment, the tab 213 and the third opening 113 may be fixedly connected, and in the initial state, the second guide portion 22 and the first guide portion 21 are detachably connected, and when the second guide portion 22 is pulled to the distal side, the second guide portion 22 is separated from the first guide portion 21 and pulled out from the distal side, and the first guide portion 21 is retained in the cartridge assembly 1.

The guide part provided by the utility model can be independently placed and not mounted on the nail-cylinder part of the anastomat before being used, and can be selectively mounted by a user according to the requirement, the operation is simpler, only the first guide part 21 needs to be mounted, and in some embodiments, the second end 222 of the second guide part 22 needs to be mounted on the far-end side 121 of the nail anvil pull rod 12; can also be directly arranged on the nail barrel part of the anastomat without being arranged by the user.

the utility model provides a guide piece for circular tube type anastomat, set up the distal end side at nail storehouse subassembly with the guide piece, can guide nail storehouse subassembly well and get into the operation position, protect the mucosa layer of stub tissue and tissue, and after nail storehouse subassembly reachs the operation position, apply the external force towards distal end side direction to the guide piece, can remove the guide piece part at least from distal end side conveniently, can not increase extra burden for the operation process, can not influence the operation effect because of the existence of guide piece yet, use experience has been improved. Meanwhile, the guide piece is elastic and can be matched with anastomats of multiple models, and the production and use compatibility is good.

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. A guide for a cartridge assembly for a circular tube-type stapler, the guide comprising:

a first guide portion;

2. The guide of claim 1, wherein the first guide portion is removably secured to the cartridge assembly and the second guide portion is configured to move distally with the second guide portion to disengage the cartridge assembly when the second guide portion is subjected to an external force.

3. The guide according to claim 1, wherein the distal end side of the first guide portion is connected to the second guide portion by a separation line, and the second guide portion is separable from the first guide portion at the separation line when an external force is applied to the second guide portion in a direction toward the distal end side.

4. The guide of claim 1, wherein an outer sidewall of the guide is at least partially coated with a lubricating layer.

5. The guide of claim 1, wherein the cartridge assembly comprises a cartridge, the first guide portion is a tubular portion surrounding an outer sidewall of the cartridge, a distal side of the first guide portion being connected to a first end of the second guide portion.

6. The guide of claim 5, wherein the first guide is at least partially resilient and the resilient portion of the first guide is in an expanded state when the resilient portion of the first guide is wrapped around the outer sidewall of the cartridge.

7. The guide of claim 5, wherein an inner side wall of the first guide portion is provided with at least one protrusion.

8. The guide of claim 7, wherein the protrusion of the inner side wall of the first guide portion comprises a plurality of protrusions aligned in an axial direction of the stapler; or

9. The guide of claim 1, wherein the second guide portion is a deformable flexible portion, the second guide portion including a tapered portion that increases in diameter from a side thereof proximate the second end of the second guide portion to a side thereof proximate the first end of the second guide portion.

10. The guide of claim 1, wherein the first guide portion and the second guide portion are integrally formed.

11. The guide of claim 1, wherein the guide has a thickness of less than 0.1 millimeters.

12. Circular tube-type anastomat, characterized in that it comprises a guide according to any one of claims 1 to 11.