CN213075774U - Guiding device and circular tube type anastomat - Google Patents

Abstract

The utility model provides a guiding device and circular tube type anastomat, guiding device are used for guiding the nail storehouse subassembly of circular tube type anastomat to get into the operation position, guiding device includes: the liquid storage container comprises a sealing sleeve and stored liquid, and the first pull rope can pull the sealing sleeve of the liquid storage container to release the stored liquid into the cavity of the guide. The guide part has a first state and a second state, when the guide part is in the first state, the guide part is at least partially arranged on the far-end side of the nail barrel and can play a role in guiding, liquid is stored in the sealing sleeve, when the sealing sleeve is pulled by a pull force towards the near end to release the liquid, the guide part can absorb the liquid and the volume of the liquid is increased to enter the second state, and when the guide part is pulled towards the direction of the near end side of the anastomat, the guide part can be separated from the far-end side of the nail barrel, so that the normal firing of the anastomat cannot be influenced.

Description

Guiding device and circular tube type anastomat

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to guiding device 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 low rectal surgery, access is required through the anus, which is a muscular opening and is in a radially 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 guiding device and circular tube type anastomat can guide nail storehouse subassembly to get into the tissue well to can conveniently remove from the distal end side of nail storehouse subassembly.

The embodiment of the utility model provides a guiding device for the nail storehouse subassembly of circular tube type anastomat, the nail storehouse subassembly includes a nail section of thick bamboo, guiding device includes:

the guide part is internally provided with a cavity;

the liquid storage container is positioned inside the cavity and comprises a sealing sleeve and liquid stored in the sealing sleeve; and

a first end of the first pull rope is fixedly connected with a sealing sleeve of the liquid storage container, and a second end of the first pull rope extends out of the nail barrel;

the guide has a first state in which the guide is at least partially disposed on the distal side of the cartridge and a second state in which the liquid is stored in the sealed gland; when the first pull rope is pulled by the pulling force towards the proximal side to pull the sealing sleeve to release the liquid, the guide piece enters the second state, and when the guide piece is pulled by the pulling force towards the proximal side direction of the anastomat, the guide piece can be separated from the distal side of the nail barrel.

Optionally, the cavity extends in an axial direction of the cartridge and through at least a proximal end face of the guide.

Optionally, the sealing sleeve is at least partially connected to the guide.

Optionally, the guide comprises:

a guide portion provided at a distal end side of the cartridge;

the positioning part is positioned inside the nail barrel;

and the pull-out part is fixedly connected with the guide part through the positioning part, and when the pull-out part is pulled towards the proximal side direction of the anastomat, the pull-out part can pull the guide part and the positioning part to move towards the proximal side direction of the anastomat until the guide part is separated from the distal side of the nail barrel.

Optionally, the guide portion, the positioning portion and the pulling portion are integrally formed.

Optionally, the first pull cord is fixedly connected to the pull-out portion, and when the guide is in the second state and the first pull cord is pulled in a direction toward a proximal end of the stapler, the first pull cord may pull the guide out of the cartridge through the pull-out portion.

Optionally, the stapler further comprises a second pulling rope fixedly connected with the pulling-out part, and when the guide is in the second state and the second pulling rope is pulled towards the proximal side of the stapler, the second pulling rope can pull the guide out of the nail barrel through the pulling-out part.

Optionally, the side surface of the distal end of the liquid storage container is a circular arc surface.

Optionally, in the first state, the guiding element is a structure formed by compression of the filling material, and when the guiding element is in contact with the liquid, the guiding element absorbs the liquid and expands towards at least one direction, so as to enter the second state.

Optionally, the guiding device further includes a flexible outer sleeve disposed outside the guiding member, and the outer sleeve is fixedly connected to the guiding member and/or the outer sleeve is fixedly connected to the first pulling rope.

Optionally, the outer wall surface of the guide is at least partially coated with a hydrophobic coating.

Optionally, the outer wall surface of the 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, include guiding device.

The utility model provides a guiding device and circular tube type anastomat have following advantage:

the utility model provides a guiding device for a circular tube type anastomat, when the guiding piece is in a first state, a nail bin assembly can be well guided to enter tissues, the damage to the tissues in the moving process of the nail bin assembly is reduced, and the stump tissues and the mucous membrane layer of the tissues are protected; after the nail bin assembly reaches the operation position, the liquid prestored in the liquid storage tissue is broken through the first pull rope, so that the guide piece can be pulled more easily to move towards the direction of the proximal end side of the anastomat when the guide piece is contacted with the liquid and then absorbs the liquid volume to increase and enters the second state, and therefore the distal end side of the nail bin assembly can be removed conveniently, the percussion process of the anastomat cannot be hindered, operation is easy, and use is convenient.

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 view of a guide device according to a first embodiment of the present invention applied to a nail cartridge;

fig. 2 is a schematic structural view of a guide device according to a first embodiment of the present invention;

FIG. 3 is a schematic view of the guiding device of the second embodiment of the present invention applied to a nail cartridge;

fig. 4 is a schematic structural view of the guiding device of the third embodiment of the present invention applied to a nail cartridge.

Reference numerals:

1 guide 31 distal side of reservoir

11 proximal end of reservoir of lead 32

111 leading portion distal side 33 seal gland

112 proximal side 34 of the guide portion

12 positioning part 4 first pull rope

The first end of the first pull rope at the distal end side 41 of the 121 positioning part

122 second end of proximal side 42 first pull cord of positioning portion

13 pull-out part 43 thread end joint

14 cavity 5 second pull rope

141 distal side of the cavity 51 distal side of the second drawstring

142 proximal side of cavity 52 proximal side of second pull cord

2 outer 6 nail barrel

21 distal side of the outer housing 61 distal side of the cartridge

Proximal side of the outer sleeve 22 proximal side of the cartridge 62

23 fastener 63 window

3 liquid storage container

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 device for a circular tube type anastomat and a circular tube type anastomat comprising the guide device. 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, and the nail bin assembly comprises a nail barrel. The guide device comprises a guide part, and a cavity is arranged in the guide part; the liquid storage container is positioned inside the cavity and comprises a sealing sleeve and liquid stored in the sealing sleeve; and the first end of the first pull rope is fixedly connected with the sealing sleeve of the liquid storage container, and the second end of the first pull rope extends out of the nail barrel.

The guide piece is provided with a first state and a second state, when the guide piece is in the first state, the guide piece is at least partially arranged on the far end side of the nail barrel, the movement of the nail barrel in tissues can be guided, the damage to the tissues in the movement process of the nail bin assembly is reduced, and the stump tissues and the mucosa layer of the tissues are protected. The overall profile of the guide may be an arrangement in which the cross-sectional area gradually increases in the direction from the distal side to the proximal side, for example, in the shape of: conical, oval, etc., as long as the shape that can achieve the guidance is possible. At this point, the liquid is inside the gland and not in contact with the guide.

After the guide piece moves to the operation position along with the nail barrel, when the first pull rope is pulled towards the proximal end side direction of the anastomat, the first pull rope can pull the sealing sleeve, so that the sealing sleeve releases stored liquid. When the guide part is contacted with the released liquid in the first state, the guide part can absorb the liquid and increase the volume to enter the second state, and the sealing sleeve and the first pull rope which enter the second state can be fixedly connected or can be separated into two parts. In this state, when a pulling force is applied to the guide in a direction toward the proximal end side of the stapler, the guide can be disengaged from the distal end side of the cartridge, so that the normal firing of the stapler is not affected, and the surgical operation is simple and the use is convenient.

The structure of the guiding device 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. It should be noted that, in order to clearly show the structure of the guide device, the guide device is shown in a cross section in fig. 1 to 4, and the cutting direction of the guide device is parallel to the axial direction of the nail barrel 6.

As shown in fig. 1 and 2, in order to provide the guiding device of the first embodiment of the present invention, the guiding device includes a guiding member 1, a liquid storage container 3 and a first pulling rope 4, wherein the guiding member 1 is provided with a cavity 14 inside, the liquid storage container 3 is located inside the cavity 14, the liquid storage container 3 includes a sealing sleeve 33 and a liquid 34 stored in the sealing sleeve 33, a first end 41 of the first pulling rope 4 is fixedly connected to the sealing sleeve 33 of the liquid storage container 3, and a second end 42 of the first pulling rope 4 extends out of the nail barrel 6. In this embodiment, in the initial state, the first end 41 of the first cord 4 is located on the distal end side of the second end 42.

The guide 1 has a first state and a second state, the guide 1 has a first volume and a second volume when in the first state and the second state, respectively, the second volume is greater than the first volume, and the guide 1 has a greater stiffness in the first state than in the second state.

In the initial state, the guide 1 is in the first state, the liquid 34 is located in the sealing sleeve 33, the guide 1 is at least partially disposed on the distal side 61 of the cartridge 6, and the guide 1 has a greater stiffness to guide the movement of the cartridge 6 within the tissue. When the nail barrel 6 moves to the operation position in the tissue, the first pull rope 4 is pulled towards the proximal end side direction of the anastomat, and the first pull rope 4 can pull the sealing sleeve 33, so that the sealing sleeve 33 is opened to release the stored liquid. At this time, the guide 1 is in contact with the liquid 34 pre-stored in the liquid storage container 3, the guide 1 can absorb the liquid to increase in volume to enter the second state, the hardness of the guide 1 is reduced due to expansion, and when the guide 1 is in the second state and is pulled in a direction towards the proximal side of the stapler, the guide 1 can be disengaged from the distal side 61 of the cartridge 6, so that the normal firing of the stapler is not affected.

In this embodiment, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, the end farther from the operator, i.e. the end closer to the surgical site, is the distal side, and the direction along the axial center of the stapler is the axial direction, i.e. the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in the perspective of FIG. 1, the distal side 61 is the upper side and the proximal side 62 is the lower side for the cartridge 6. In the present invention, for a component, the inside and the outside are relative to the axis of the nail barrel 6, the side close to the axis is the inside, and the side far away from the axis is the outside.

As shown in fig. 1 and 2, in this embodiment, in the first state, the guide member 1 is a structure in which the packing material is compressed, and when the guide member 1 comes into contact with liquid, the guide member 1 absorbs the liquid and expands in at least one direction. The filling material may be a compressible fabric, for example a compressible material such as medical towels, medical gauze, cotton threads, silk and the like. Specifically, in the preparation of the guide 1, the filling material may be first sterilized (high temperature sterilization and/or ultraviolet sterilization), then the filling material is folded into a pre-pressed shape, and is placed in a mold and pressed with a high pressure (e.g., a pressure of 50 to 150 tons), so that the guide 1 in the first state is obtained, and has a relatively large hardness. When the compressible material in the first state absorbs liquid, it gradually expands and becomes loose, and the hardness decreases.

In this embodiment, the sealing sleeve 33 is preferably made of a readily breakable film, for example, a silicone film, a rubber film, a plastic film, or the like having a small thickness may be used. When the seal cover 33 is pulled in the proximal direction by the first pulling rope 4, the seal cover 33 is broken by the first pulling rope 4, and the liquid 34 (e.g., physiological saline, pure medical water, etc.) stored in the seal cover 33 is released.

Further, in order to facilitate pulling the sealing sleeve 33 open, a tear line or a weak connection portion with a small thickness, which is easy to tear, may be preset on the sealing sleeve 33, and the tear line or the weak connection portion may extend along the axial direction of the nail barrel 6 or along the circumferential direction of the sealing sleeve 33, and when the sealing sleeve 33 is pulled in the proximal direction by the first pulling rope 4, the sealing sleeve 33 is pulled open at the tear line or the weak connection portion, thereby releasing the liquid stored inside.

As shown in fig. 1 and 2, the cartridge 6 is provided with at least one window 63 on the side, and the proximal end 42 of the first cord 4 extends from the window 63 to the outside of the cartridge 6. The first pulling rope 4 may further be fixedly connected to the guide member 1 at a string head connection 43, and when the guide member 1 is in the second state and the guide member 1 needs to be removed, the first pulling rope 4 is continuously pulled toward the proximal side direction of the stapler, and the first pulling rope 4 may simultaneously drive the sealing sleeve 33 and the guide member 1 to move toward the proximal side direction to penetrate out of the window 63 of the nail barrel 6. Thus, the first pull cord 4 may not only serve as a means for breaking the gland 33 to release the liquid, but may further serve as a pull-out means for removing the guide 1 from the cartridge 6.

Further, in this embodiment, the sealing sleeve 33 may be at least partially connected to the guide 1, and when the guide 1 is in the first state, the sealing sleeve 33 may be fixedly disposed relative to the guide 1, so as to improve the position stability of the liquid storage container 3 in the initial state. Moreover, when the guide 1 is in the second state and the guide 1 is removed from the nail barrel 6 by the first pull rope 4, the sealing sleeve 33 can be more conveniently ensured to be pulled out from the window 63 together with the guide 1.

In this embodiment, the cavity 14 extends in the axial direction of the cartridge 6 and at least through the proximal end face of the guide 1. The shape of the reservoir 3 is adapted to the shape of the cavity 14. The distal side 31 and the proximal side 32 of the reservoir 3 are located at positions corresponding to the positions of the distal side 141 and the proximal side 142 of the cavity 14, respectively. In other alternative embodiments, the reservoir 3 may take other shapes. Further, the end surface of the distal side 31 of the reservoir 3 may be a circular arc surface, which facilitates the pre-installation of the reservoir 3 into the cavity 14 from the proximal side 142 of the cavity 14.

In this embodiment, the guide 1 comprises a guiding portion 11, a positioning portion 12 and a pulling portion 13, which are arranged on the distal end side 61 of the cartridge 6, the positioning portion 12 is located inside the cartridge 6, the guiding portion 11 and the positioning portion 12 are integrally formed, i.e. the proximal end side 112 of the guiding portion 11 is connected with the distal end side 121 of the positioning portion 12. The pull-out part 13 may be a part fixedly connected to the positioning part 12 and projects outwards from the proximal side 122 of the positioning part 12. The pull-out portion 13 may be integrally formed with the positioning portion 12 or may be a separate two-part. In this embodiment, the guiding portion 11, the positioning portion 12 and the pulling-out portion 13 may be formed by pressing a complete piece of medical gauze or cotton, and when the pulling-out portion 13 is pulled toward the proximal side direction of the stapler, the pulling-out portion 13 may pull the positioning portion 12 and the guiding portion 11 to move together toward the proximal side direction of the stapler, thereby disengaging the guiding portion 11 from the distal end side 61 of the cartridge 6. In other alternative embodiments, the guide portion 11, the positioning portion 12 and the pull-out portion 13 may be three portions independent from each other, and the guide portion 11 and the pull-out portion 13 may be fixedly connected to the positioning portion 12.

In this embodiment, the first pull-out portion 13 is fixedly connected to the first pull-out cord 4, and when the guide 1 is in the second state and the first pull-out cord 4 is pulled in a direction toward the proximal end of the stapler, the first pull-out cord 4 can pull out the guide 1 from the cartridge 6 through the pull-out portion 13.

As shown in fig. 2, a distal side 141 of the cavity 14 may be connected to the guiding portion 11 and a proximal side 142 of the cavity 14 may be connected to the proximal side 122 of the positioning portion 12. In order to provide a better guiding effect, in the first state the outer diameter of the distal side 111 of the guide 11 is smaller than the outer diameter of the proximal side 112 of the guide 11, so that the cartridge 6 can be better guided into and moved within the tissue. The positioning part 12 may be a cylinder shape adapted to the internal shape of the nail barrel 6, the positioning part 12 may be fixed to the nail barrel 6 by interference fit, and in other alternative embodiments, the positioning part 12 may be detachably fixed to the nail barrel 6 by an additional connecting member or other means. In this embodiment, the place where the outer diameter of the guide 1 is the largest is the position of the proximal end side 112 of the guide portion 11. Further, in the first state, the maximum outer diameter of the guide 1 is smaller than or equal to the outer diameter of the distal side 61 of the cartridge 6, so that the outer diameter of the cartridge 6 is not affected, and the difficulty of moving the cartridge assembly in the tissue is not increased by the presence of the guide 1.

As shown in fig. 1 and 2, the guide device further comprises a flexible outer sheath 2. The outer sleeve 2 is fitted over the guide 1, the distal end side 21 of the outer sleeve 2 corresponds to the distal end side 111 of the guide portion 11, and the proximal end side 22 of the outer sleeve 2 corresponds to the proximal end side 122 of the positioning portion 12. The outer sleeve 2 can play a certain role in blocking liquid for the guide 1, and when the nail cartridge assembly moves in the tissue and does not reach the operation position, the outer sleeve 2 blocks the guide 1 from directly contacting with other liquid, so that the guide effect is prevented from being influenced by the fact that the guide 1 is softened when being contacted with the liquid in the guide process. On the other hand, the outer casing 2 may have a smoother outer surface than the guide 1, which may further reduce the friction between the guide and the tissue, thereby further reducing the damage to the tissue. Further, in this embodiment, the outer side surface of the outer jacket 2 may be at least partially lubricious or coated with a lubricious layer, and the lubricious layer may be formed by coating with an aqueous lubricant or an oil lubricant, which are known in the art, or by coating with solid medical vaseline or the like. For example, hydrophilic coating of the outer wall surface of the jacket 2, in which the outer surface of the jacket 2 is dipped in water before use, becomes very lubricious, has been widely used in the surgical field.

The outer casing 2 is preferably made of a flexible film and may further be made of a film having a certain elasticity, but it is also possible that it is not elastic. For example, the outer jacket 2 may be made of a flexible rubber material, a silicone material, a plastic material, or the like, and the thickness of the outer jacket 2 may be less than 0.2 mm, and further may be less than 0.1 mm and greater than 0.01 mm. In alternative embodiments, the jacket 2 may have other thickness dimensions, and is not limited to the ranges set forth herein. The sheath 2 can also be made of flexible fabric, such as knitted fabric, etc., and the material used for the fabric can be rayon material or spun yarn obtained by polymer extrusion, etc. And the outer casing 2 is preferably made of an elastic fabric.

As shown in fig. 2, in this embodiment, the outer jacket 2 is fixed to the guide portion 11 of the guide member 1 by a fastener 23. In other alternative embodiments, the outer jacket 2 and the guide 1 may be connected in other ways at other positions. Since the outer sleeve 2 is fixedly connected to the guide 1, when the first cord 4 is pulled toward the proximal end side and the guide 1 is pulled out of the cartridge 6 by the first cord 4 through the pull-out portion 13, the outer sleeve 2 can be pulled out of the cartridge 6 at the same time. The outer jacket 2 is of a thin-walled construction so as not to influence the outer diameter of the guide. In production, the outer sleeve 2 can adopt an injection molding process, so that the fastening buckle 23 and the outer sleeve 2 are integrally formed.

In another alternative embodiment, the outer sleeve 2 may not be fixedly connected to the guide 1, but may be fixedly connected to the first pull cord 4, and when the first pull cord 4 pulls the guide 1 out of the nail barrel 6 through the pull-out portion 13, the first pull cord 4 may directly pull the outer sleeve 2 out of the nail barrel 6.

Fig. 3 is a schematic structural diagram of a guiding device according to a second embodiment of the present invention. This embodiment differs from the first embodiment in that: the guide 1 is not provided with an outer jacket 2 on the outside. In this embodiment, in order to improve the guiding effect of the cartridge assembly, the outer wall surface of the guide 1 may be at least partially lubricious or coated with a lubricious layer, further reducing the friction between the guide 1 and the tissue. The lubricating layer can be formed by coating with water-based lubricant or oil-based lubricant which is available in the prior art, and can also be coated and lubricated by solid medical vaseline and the like. For example, hydrophilic coating of the outer wall surface of the guide 1, in which the outer surface of the guide 1 is dipped with water before use, becomes very lubricious, has been widely used in the surgical field.

Further, in order to prevent the guide member 1 from being softened by contact with other liquid during the process of guiding the cartridge 6 in the tissue to affect the guiding effect, the outer wall surface of the guide member 1 may be at least partially coated with a hydrophobic coating. When the nail bin assembly enters the tissue, the hydrophobic coating can isolate the outer wall surface of the guide piece 1 from body fluid or other liquid in the tissue, and the situation that when the nail bin assembly does not reach the operation position, the outer wall surface of the guide piece 1 is contacted with the liquid, so that the guide piece 1 is partially expanded and softened to influence the guide effect is avoided. After the cartridge assembly reaches the surgical position, the inner side surface of the guide 1 can be contacted with liquid to expand and soften by injecting the liquid into the guide 1. The hydrophobic coating applied on the outer lateral surface of the guide 1 may be a hydrophobic coating already known in the art, and preferably a hydrophobic coating having a better biocompatibility. Further, in order to achieve a better guiding effect, a lubricating layer may be further coated on the outer portion of the hydrophobic coating layer of the outer wall surface of the guide 1. The lubricating layer may be the above-mentioned aqueous lubricating layer, oil lubricating layer, hydrophilic coating layer, solid lubricating layer, or the like.

Fig. 4 is a schematic structural diagram of a guiding device according to a fourth embodiment of the present invention. This embodiment differs from the third embodiment in that: the guide means further comprise a second pull cord 5. The distal end 51 of the second pull cord 5 is fixedly connected to the pull-out part 13, and the proximal end 52 of the second pull cord 5 extends outside the cartridge 6 through the window 63. When the guide 1 is in the second state and the second pull cord 5 is pulled in a direction toward the proximal end of the stapler, the second pull cord 5 can pull the guide 1 out of the cartridge 6 through the pull-out portion 13. Therefore, the first cord 4 can no longer be fixedly connected to the pull-out portion 13.

In an alternative embodiment of the present invention, the guide member 1 may be configured not by the above-mentioned structure obtained by compressing the filling material, but by a structure having a plurality of air holes. When the guide 1 is in the first state, the air hole volume of the guide 1 is small. When the guide 1 is in the first state and the guide 1 is in contact with a liquid, the volume of the pores increases after the guide 1 at least partially absorbs the liquid, so that the guide 1 expands into the second state at least in one direction. The guide 1 may be made of sponge which absorbs water, and when there is no liquid absorption, the guide 1 is dry and very hard, the pores therein are in a small state, the pores increase in volume after the guide 1 absorbs liquid and swells, and the guide 1 becomes soft and more easily pulled out of the cartridge 6.

In other alternative embodiments, the guide 1 may also be made of other materials that can exhibit swelling in at least one direction when exposed to a liquid, such as protein fibers (e.g., silk, spider silk, etc.), synthetic polymers (e.g., polyacrylonitrile, polyamide, polyimide, etc.), and the like.

The guide device provided by the utility model can be independently placed without being arranged on the nail barrel part of the anastomat before being used, and can be selectively arranged by a user according to the requirement, the operation is simpler, and only the guide part needs to be arranged on the far end side of the nail barrel; can also be directly arranged on the nail barrel part of the anastomat without being arranged by the user.

The utility model provides a guiding device and circular tube type anastomat have following advantage:

the utility model provides a guiding device for a circular tube type anastomat, when the guiding piece is in a first state, a nail bin assembly can be well guided to enter tissues, the damage to the tissues in the moving process of the nail bin assembly is reduced, and the stump tissues and the mucous membrane layer of the tissues are protected; after the nail bin assembly reaches the operation position, the liquid prestored in the liquid storage tissue is broken through the pull rope, so that the guide piece can be pulled more easily to move towards the direction of the proximal end side of the anastomat when the guide piece is contacted with the liquid and then absorbs the liquid volume to increase so as to enter the second state, and therefore the distal end side of the nail bin assembly can be removed conveniently, the percussion process of the anastomat cannot be hindered, operation is easy, and use is convenient. The utility model provides a guiding device enters into the second state from first state, is the change of a physical form, and the conversion process of state is soft, can not constitute extra harm to the group weaving.

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 (13)

1. A guide device, characterized by a cartridge assembly for a circular tube-type stapler, the cartridge assembly including a cartridge, the guide device comprising:

the guide part is internally provided with a cavity;

the liquid storage container is positioned inside the cavity and comprises a sealing sleeve and liquid stored in the sealing sleeve; and

a first end of the first pull rope is fixedly connected with a sealing sleeve of the liquid storage container, and a second end of the first pull rope extends out of the nail barrel;

the guide has a first state in which the guide is at least partially disposed on the distal side of the cartridge and a second state in which the liquid is stored in the sealed gland; when the first pull rope is pulled by the pulling force towards the proximal side to pull the sealing sleeve to release the liquid, the guide piece enters the second state, and when the guide piece is pulled by the pulling force towards the proximal side direction of the anastomat, the guide piece can be separated from the distal side of the nail barrel.

2. Guide device according to claim 1, wherein the cavity extends in the axial direction of the cartridge and through at least a proximal end face of the guide.

3. Guide device as in claim 1, characterized in that the sealing sleeve is at least partially connected to the guide.

4. The guide device of claim 1, wherein the guide comprises:

a guide portion provided at a distal end side of the cartridge;

the positioning part is positioned inside the nail barrel;

and the pull-out part is fixedly connected with the guide part through the positioning part, and when the pull-out part is pulled towards the proximal side direction of the anastomat, the pull-out part can pull the guide part and the positioning part to move towards the proximal side direction of the anastomat until the guide part is separated from the distal side of the nail barrel.

5. The guide device according to claim 4, wherein the guide portion, the positioning portion, and the pull-out portion are integrally formed.

6. The guide device of claim 4, wherein the first pull cord is fixedly coupled to the pull-out portion, wherein the guide member is in the second state and wherein the first pull cord is pulled in a direction toward a proximal side of the stapler such that the first pull cord can pull the guide member out of the cartridge through the pull-out portion.

7. The guide device of claim 4, further comprising a second pull cord fixedly coupled to the pull-out portion, wherein the guide member is in the second state and wherein the second pull cord is pulled in a direction toward the proximal side of the stapler by the pull-out portion to pull the guide member from the cartridge.

8. The guide device of claim 1, wherein the distal side of the reservoir is a radius.

9. The guide device of claim 1, wherein in the first state the guide member is a compressed filled structure, and wherein upon contact with liquid the guide member absorbs the liquid and expands in at least one direction into the second state.

10. The guide device of claim 1, further comprising a flexible outer sleeve disposed on an exterior of the guide member, the outer sleeve being fixedly attached to the guide member and/or the outer sleeve being fixedly attached to the first pull cord.

11. Guide means according to claim 1, wherein the outer wall surface of the guide member is at least partially coated with a hydrophobic coating.

12. Guide means according to claim 1, wherein the outer wall surface of the guide means is at least partially coated with a lubricating layer.

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

Images