CN212547055U - Guiding device and circular tube type anastomat - Google Patents

Abstract

The utility model provides a guiding device and a circular tube type anastomat, wherein the guiding device is used for guiding a nail bin assembly of the circular tube type anastomat to enter a surgical site, the nail bin assembly comprises a nail barrel provided with at least one window, the guiding device comprises a guiding piece, and at least part of the guiding piece is arranged on the far end side of the nail barrel; the guide has a first state and a second state, the guide being fixed relative to the cartridge when the guide is in the first state, the guide having a first volume; the guide may be separable from the cartridge through a window when the guide is in the second state, the guide having a second volume, the second volume being greater than the first volume. Through this guiding device, can guide nail storehouse subassembly entering tissue well, protect the tissue mucosa to when the guide gets into the second state, can conveniently remove from the distal end side of nail storehouse subassembly, operation easy operation, convenient to use.

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, a nail bin assembly for a circular tube type anastomat, the nail bin assembly comprises a nail barrel, the side wall of the nail barrel is provided with at least one window, the guiding device comprises a guiding piece, and the guiding piece is at least partially arranged at the far end side of the nail barrel;

the guide has a first state and a second state, the guide being fixed relative to the cartridge when the guide is in the first state, the guide having a first volume; the guide may be separable from the cartridge through the window when the guide is in the second state, the guide having a second volume, the second volume being greater than the first volume.

Optionally, when the guide member is in the first state and is in contact with the liquid, the guide member at least partially absorbs the liquid and then becomes larger in volume, so that the guide member enters the second state and the rigidity of the guide member becomes smaller.

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 guide is a compression fabric.

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

Alternatively, in the first state, the guide is a structure in which the filler material is compressed in the axial direction of the cartridge, and when the guide is in contact with the liquid, the guide absorbs the liquid to extend in the axial direction of the cartridge.

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 locating part is in interference fit with the inner side wall of the nail barrel.

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

Optionally, the stapler further comprises an elbow disposed on a proximal side of the cartridge, the guide device further comprising a protective sheath at least partially covering an outer side of the elbow;

the proximal end side of the pulling part extends out of the window and extends to the bent pipe, and the part of the pulling part corresponding to the bent pipe is located between the outer side surface of the bent pipe and the inner side surface of the protective sleeve.

Optionally, the guiding device further comprises a flexible outer sleeve, the outer sleeve is sleeved outside the guiding piece, and the outer sleeve is fixedly connected with the guiding piece;

the outer cover comprises a first outer cover portion and a second outer cover portion which are integrally formed, the first outer cover portion is sleeved on the outer side of the guide portion, and the second outer cover portion is at least partially sleeved on the outer side of the positioning portion.

Optionally, the locating part comprises an outer sleeve matching part located on the far-end side and a nail barrel matching part located on the near-end side, the second outer sleeve part is sleeved on the outer side of the outer sleeve matching part, and the outer diameter of the outer sleeve matching part is smaller than that of the nail barrel matching part.

Optionally, an outer edge of a proximal end side of the positioning portion is provided with a chamfer.

Optionally, a clamping part is arranged on the near-end side of the pulling-out part, the clamping part is fixed at the window, and the clamping part does not protrude out of the outer side surface of the nail barrel.

Optionally, a cavity is formed in the guide member and extends through at least the proximal face of the guide member in the axial direction of the cartridge.

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

Optionally, in the first state, a maximum outer diameter of the guide is less than or equal to an outer diameter of the distal side of the cartridge.

Optionally, the guiding member is a structure having a plurality of air holes, the guiding member is in the first state, and when the guiding member contacts with the liquid, the guiding member at least partially absorbs the liquid and then expands in at least one direction, and the volume of the air holes increases, so that the guiding member enters the second state.

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; when the guide piece enters the second state, the guide piece can be pulled more easily to move towards the direction of the proximal end side of the anastomat, so that the guide piece can be conveniently removed from the distal end side of the nail bin assembly after reaching the operation position, the firing process of the anastomat cannot be obstructed, the operation is simple, and the 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;

figure 4 is a schematic view of the engagement of a guide and a jacket of a second embodiment of the invention;

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

FIG. 6 is a schematic view showing the structure of the guide device of the third embodiment of the present invention applied to a nail cartridge;

fig. 7 is a schematic structural view of a guide member according to a fourth embodiment of the present invention;

FIG. 8 is a schematic structural view of a guide device according to a fourth embodiment of the present invention applied to a nail cartridge;

fig. 9 is a schematic structural view of a guide device according to a fifth embodiment of the present invention;

fig. 10 is a schematic view of the structure of the guide member and the outer sleeve of the guide device according to the fifth embodiment of the present invention;

FIG. 11 is a schematic view of a guide device according to a sixth embodiment of the present invention applied to a nail cartridge;

FIG. 12 is a schematic view showing a guide device according to a seventh embodiment of the present invention applied to a cartridge;

fig. 13 is a schematic structural view of a protective cover according to a seventh embodiment of the present invention;

FIG. 14 is a schematic view showing the guide device according to the eighth embodiment of the present invention applied to a cartridge;

fig. 15 is a schematic structural view of the guiding device of the ninth embodiment of the present invention applied to a nail cartridge.

Reference numerals:

1 guide 23 fastener

11 guide part 3 pull rope

111 leading portion distal end side 31 pulling the distal end side of the cord

112 proximal side of the guide portion 32 stay proximal side of

113 jacket joint 33 cable end joint

12 positioning part 4 protective sleeve

Distal 8 cartridge of 121 site

122 proximal side of the locating portion 81 distal side of the cartridge

123 outer sleeve engaging portion 82 proximal side of cartridge

124 nail barrel matching part 83 window

125 chamfer 9 bend

13 pull-out part

131 holding part

14 cavity

15 air hole

141 distal side of the cavity

142 proximal side of the cavity

2 coat

21 first outer race section

22 second housing part

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, the nail bin assembly comprises a nail barrel, and at least one window is arranged on the side wall of the nail barrel. In operation, it is desirable to have the staple cartridge assembly enter the interior of tissue, move forward to a surgical position, and interface with an anvil assembly that is at least partially disposed within another section of tissue. The guide device is used for better guiding the nail cartridge assembly to enter a surgical site. In particular, the guide device includes a guide at least partially disposed on a distal side of the cartridge. 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. The guide has a first state and a second state, the guide being fixed relative to the cartridge when the guide is in the first state, the guide having a first volume; the guide may be separable from the cartridge through the window when the guide is in the second state, the guide having a second volume, the second volume being greater than the first volume. I.e. the guide expands and becomes voluminous when it passes from the first state to the second state.

Therefore, when the guide piece is in the first state, the guide piece can well guide the nail barrel of the nail bin assembly to enter the tissue, the damage to the tissue in the moving process of the nail bin assembly is reduced, and the stump tissue and the mucous membrane layer of the tissue are protected. After the nail cartridge assembly reaches the operation position, the guide piece can be expanded to enter the second state, and the guide piece can be conveniently removed from the distal end side of the nail cartridge, so that the firing process of the anastomat is not obstructed, the 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 15, and the cutting direction of the guide device is parallel to the axial direction of the nail barrel 8.

As shown in fig. 1 and 2, the nail barrel 8 is provided with a window 83 for the structure of the guiding device and the nail barrel 8 according to the first embodiment of the present invention. Wherein the guiding means comprises a guide 1, the guide 1 being at least partially arranged at the distal side 81 of the cartridge 8.

The guide piece 1 has a first state and a second state, and in the initial state, the guide piece 1 has a first volume and is fixed relative to the nail barrel 8, so that a good guide effect can be provided for the nail barrel 8 to enter the tissue, the damage to the tissue in the moving process of the nail bin assembly is reduced, and the stump tissue and the mucosa layer of the tissue are protected. After the cartridge 8 has been advanced into the tissue, the guide 1 can be expanded into a second state, in which the guide 1 has a second volume, which is larger than the first volume, and in which pulling the guide 1 in the proximal direction of the stapler can easily pull the guide 1 in the proximal direction, so that the guide 1 is pulled out of the window 83 and the guide 1 is disengaged from the distal side 81 of the cartridge 8 without affecting the surgical procedure.

In this embodiment, the stiffness of the guide 1 in the first state is greater than the stiffness in the second state. In the initial state the guide 1 is in the first state with a relatively high stiffness and the guide 1 is at least partly located at the distal side 81 of the cartridge 8, and when the guide 1 is expanded into the second state the stiffness is reduced, i.e. into the second, softer state, and is more easily pulled out of the viewing window 83 of the cartridge 8. In this embodiment, the switching of the guide 1 from the first state to the second state may be such that the guide 1 enters the second state with a relatively small stiffness by being in contact with the liquid, i.e. the guide 1 is in the first state and the guide 1 is in contact with the liquid, the stiffness of the guide 1 being at least partially reduced after absorption of the liquid. In other alternative embodiments, it is further contemplated that the first state and the second state of the guide member 1 may be switched in other manners, such as by inflating the guide member 1 to expand the guide member 1, and the like, which are within the scope of the present invention. In this embodiment, the guide 1 has a high hardness in the first state, and can effectively guide and maintain a guiding function even when it is subjected to a pressure of a tissue such as an intestinal tract; meanwhile, the fixing of the guide piece and the nail barrel assembly is facilitated, when the operation position is not reached, the process that the anastomat passes through the inside of the tissue is realized, and when the user can perform operations such as direction adjustment and the like, the guide piece and the nail barrel assembly cannot be separated accidentally, so that the stable and reliable relative fixed connection is maintained. When the guide 1 enters the second state, the rigidity of the guide is reduced, and the guide can be separated from the view window of the nail barrel assembly without influencing the next operation of the operation.

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 81 is the upper side and the proximal side 82 is the lower side of the cartridge 8. In the present invention, for a component, the inside and the outside are relative to the axis of the nail barrel 8, 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 folded into a pre-pressed shape, placed in a mold, and pressed with high pressure (e.g., 50 to 150 tons pressure), thereby obtaining the guide 1 in the first state. Here, when the guide 1 absorbs the liquid and expands, the liquid that the guide 1 contacts may be a liquid such as a body fluid existing in a human tissue, or may be a liquid such as a physiological saline or pure medical water injected from the outside, or a device such as a water tube or a syringe may be used when injecting the liquid.

In application, if the guide 1 is expanded by absorbing liquid with too much radial expansion, the guide 1 itself may exert a certain pressure on the tissue in the radial direction and may increase the resistance of the cartridge 8 to travel in the tissue, for example, the tubular intestine, if the guide 1 is expanded in the radial direction of the intestine when it is changed to the second state, there may be a local outward expansion force on the intestine, which may cause ischemia and mucosal injury to the intestine, and may cause adverse effects after operation. Therefore, in this embodiment, in the first state, the guide 1 is a structure in which the filler material is compressed in the axial direction of the cartridge 8 (i.e., the S direction in fig. 2). I.e. the filling material is pressed in a first direction with high pressure when the guide 1 is manufactured, and the compression direction, i.e. the first direction, of the guide 1 coincides with the axial direction of the cartridge 8 when the guide is mounted on the cartridge 8. Thus, when the guide 1 comes into contact with liquid, the guide 1 absorbs the liquid to extend in the axial direction of the cartridge 8 (i.e., the S direction in fig. 2), and no excessive expansion in the radial direction occurs.

In this embodiment, the guide 1 may also be moved from the first state to the second state, i.e. the guide 1 is moved from the compressed state to the relaxed state, directly under the action of a proximally pulling force.

In this embodiment, the outer wall surface of the guide 1 may be at least partially lubricious or coated with a lubricious layer to enhance the guiding effect of the cartridge assembly and further reduce 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.

In another alternative embodiment, the outer wall surface of the guide 1 may also 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.

As shown in fig. 1 and 3, the guide 1 includes a guide portion 11, a positioning portion 12, and a pull-out portion 13, and the guide portion 11 and the positioning portion 12 are integrally formed, that is, a proximal end side 112 of the guide portion 11 is connected to a 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. 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, so that the guiding portion 11 is disengaged from the distal side 81 of the cartridge 8.

As shown in fig. 1, the guiding means may further comprise a pull cord 3, a distal side 31 of the pull cord 3 being connected to the pull-out portion 13, and a proximal side 32 of the pull cord 3 extending from the viewing window 83 of the cartridge 8 outside the cartridge 8. After the guide 1 reaches the surgical site along with the staple cartridge assembly, the operator pulls the pull cord 3 to the proximal end side, and can pull the guide 1 to the proximal end side through the pull-out portion 13, further pull the pull cord 3, and can pull the guide 1 as a whole out of the staple cartridge 8 through the window 83.

In this embodiment, the positioning portion 12 is located inside the nail barrel 8, and the positioning portion 12 and the inner side wall of the nail barrel 8 are in interference fit, so that the guiding device can be conveniently installed. And the detent 12 can be easily removed from the cartridge 8 after the detent 12 becomes soft by contact with liquid. In other alternative embodiments, the positioning portion 12 may be detachably connected to the inner side wall of the nail barrel 8 by other means, such as a detachable fastener.

In this embodiment, as shown in FIG. 2, to provide a better guiding effect, the distal side 111 of the guide 11 has a smaller outer diameter than the proximal side 112 of the guide 11 in the first state, so that the cartridge 8 can be better guided into and moved within the tissue. The locating portion 12 may be cylindrical to conform to the internal shape of the cartridge 8. 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 81 of the cartridge 8, so that the outer diameter of the cartridge 8 is not affected, and the difficulty of moving the cartridge assembly in the tissue is not increased due to the presence of the guide 1.

Fig. 3 and 4 are schematic structural views illustrating the guiding device of the second embodiment of the present invention applied to a nail cartridge. This embodiment differs from the first embodiment in that: the guide device further comprises a flexible outer casing 2. The outer sleeve 2 is sleeved outside the guide piece 1, so that a certain liquid blocking effect is achieved on the guide piece 1, when the nail cartridge assembly moves in tissues and does not reach a surgical position, the outer sleeve 2 blocks the guide piece 1 from being directly contacted with liquid, and the guide effect is prevented from being influenced by the fact that the guide piece 1 is contacted with the liquid and becomes soft 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 jacket 2 may be at least partially lubricious or coated with a lubricious layer, which may be formed by coating an aqueous lubricious layer or an oily lubricant. For example, by hydrophilic coating of the outer surface of the jacket 2, the outer surface of the jacket 2 becomes very lubricious when dipped in water before use.

In this embodiment, the outer jacket 2 is fixedly connected to the guide 1, as shown in fig. 3. For example, the jacket 2 may be connected to the guide portion 11 of the guide 1 at a jacket connection 113 by a top tie 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 pull cord 3 is pulled toward the proximal end side and the guide 1 is pulled out of the cartridge 8 by the pull-out portion 13 through the pull-out portion 3, the outer sleeve 2 can be pulled out of the cartridge 8 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.

As shown in fig. 3 and 4, in this embodiment, the outer cover 2 includes a first outer cover portion 21 and a second outer cover portion 22 which are integrally formed, the first outer cover portion 21 is disposed on the outer side of the guide portion 11 and has a shape corresponding to the shape of the guide portion 11, and the second outer cover portion 22 is disposed on the outer side of the positioning portion 12 and has a shape corresponding to the shape of the positioning portion 12. The inner side of the top of the first casing section 21 forms a catch 23 which is fixedly connected to the distal end side 111 of the guide section 11. Since the guide means shown in fig. 3 and 4 are shown in cross-section. It will be appreciated that in this embodiment, the first casing 21 completely covers the outer side wall of the guide 11.

After the outer sleeve 2 is added, in an initial state, the guide member 1 is in the first state, the maximum outer diameter of the integral structure of the outer sleeve 2 and the guide member 1 is the proximal end side position of the first outer sleeve portion 21, and the maximum outer diameter of the integral structure of the outer sleeve 2 and the guide member 1 is preferably smaller than or equal to the outer diameter of the cartridge magazine 8, so that the outer diameter of the cartridge magazine 8 is prevented from being adversely affected, and the difficulty of movement of the cartridge magazine 8 in the tissue is increased.

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. 5 and 6, the structure of the guide device according to the third embodiment of the present invention is schematically illustrated in the cartridge 8. This embodiment differs from the second embodiment in that: a cavity 14 is formed in the guide 1, the cavity 14 extending through at least the proximal end surface of the guide 1 in the axial direction of the cartridge 8. Due to the cavity 14, the filling volume of the guide 1 is greatly reduced, the length of the filling material of the guide 1 is greatly reduced, and after the guide 1 absorbs water and becomes soft, the doctor can save more time when pulling the guide 1 out of the nail barrel 8 through the pulling part 13 and the pull rope 3. In this embodiment, the proximal side 142 of the cavity 14 is connected to the proximal side 122 of the positioning portion 12, and the distal side 141 of the cavity 14 is connected to the interior of the guiding portion 11. The cavity 14 is arranged, so that the positioning part 12 is a hollow annular structure, the elastic deformation capacity of the positioning part 12 can be increased, the positioning part 12 can yield to the central part when the nail barrel assembly is loaded into the guide part 1, the nail barrel assembly can be more easily entered, and the nail barrel assembly can be more tightly fixed with the nail barrel assembly after entering.

Fig. 7 and 8 are schematic structural views illustrating the guiding device according to the fourth embodiment of the present invention applied to the cartridge magazine 8. This embodiment differs from the third embodiment in that: the distal side 141 of the cavity 14 is further connected to the distal side 111 of the guide 11. In other alternative embodiments, the size, shape and structure of the cavity 14 may be different from those shown in fig. 5 to 8, for example, the cavity 14 may be completely located in the positioning portion 12 or completely located in the guiding portion 11, which all fall within the protection scope of the present invention.

Fig. 9 and 10 are schematic structural views of a guide device according to a fifth embodiment of the present invention. This embodiment differs from the second embodiment in that: the height of the second outer sleeve part 22 of the outer sleeve 2 along the axial direction of the nail barrel 8 is smaller than the height of the positioning part 12 along the axial direction of the nail barrel 8, so that the size of the second outer sleeve part 22 can be reduced, and the material use of the outer sleeve 2 is saved. In this embodiment, in order to achieve the engagement of the guide 1 with the outer sheath 2 and the cartridge 8, the positioning part 12 includes an outer sheath engaging part 123 on the distal end side and a cartridge 8 engaging part 124 on the proximal end side, the second outer sheath part 22 is fitted over the outer side of the outer sheath engaging part 123, and the outer diameter of the outer sheath engaging part 123 is smaller than the outer diameter of the cartridge 8 engaging part 124.

Further, in this embodiment, the outer edge of the proximal end side of the positioning part 12 is provided with a chamfer 125, so that the positioning part 12 can be more conveniently mounted inside the cartridge 8 before the operation.

Fig. 11 is a schematic structural view of a guiding device according to a sixth embodiment of the present invention. This embodiment differs from the first embodiment in that: since the proximal end side of the pulling portion 13 protrudes out of the barrel 8 through the window 83 of the barrel 8, the surgeon can directly operate the pulling portion 13 to pull the guide 1 to the proximal end side without providing a separate pull cord.

Fig. 12 and 13 are schematic structural views of a guide device according to a seventh embodiment of the present invention. The stapler further comprises an elbow 9 provided on a proximal side of the cartridge 8, the proximal side of the drawn-out portion 13 extending to a position of the elbow 9. This embodiment differs from the first embodiment in that the guiding means further comprise a protective sheath 4 at least partially covering the outer side of the elbow 9, the part of the pull-out 13 corresponding to the elbow 9 being located between the outer side of the elbow 9 and the inner side of the protective sheath 4. The elbow 9 prevents the pull-out portion 13 from damaging the tissue as the cartridge assembly is advanced into the tissue. The elbow 9 is preferably made of a flexible material, such as rubber, silicone, plastic, etc., and may be made of TPE (Thermoplastic Elastomer) material, for example. The surface of the bent pipe 9 is an arc surface which is matched with the shape of the outer side surface of the bent pipe 9, so that the surface of the bent pipe 9 is better attached.

Fig. 14 is a schematic structural view of the guide device according to the eighth embodiment of the present invention applied to the cartridge 8. The difference between this embodiment and the sixth embodiment is that the proximal end side of the pull-out portion 13 is provided with a catch 131 to detachably fix the pull-out portion 13 to the cartridge 8 when the guide 1 is in the first state, better maintaining the positional stability of the guide 1. In this embodiment, the retaining portion 131 is fixed at the viewing window 83, and the retaining portion 131 does not protrude from the outer side surface of the staple cartridge 8, so as to prevent the retaining portion 131 from directly contacting the tissue to damage the tissue when the staple cartridge 8 moves in the tissue.

In each of the embodiments shown in fig. 5 to 14, a guide device having the outer cover 2 will be described as an example. It will be appreciated that the structural improvements of the various embodiments shown in figures 5 to 14 may also be applied to the construction of a guide device without an outer casing 2.

As shown in fig. 15, the guiding device according to the ninth embodiment of the present invention is applied to the nail barrel 8. This embodiment differs from the second embodiment in that: the guide 1 has a structure having a plurality of air holes 15. When the guide member 1 is in the first state and the guide member 1 is in contact with the liquid, the guide member 1 at least partially absorbs the liquid and then expands in at least one direction, and the air holes 15 increase in volume, so that the guide member 1 enters the second state. The guide member 1 may be made of sponge which absorbs water, the guide member 1 is dry and hard when not absorbing liquid, the air holes 15 therein are in a small state, the volume of the air holes 15 is increased after the guide member 1 absorbs liquid and swells, and the guide member 1 becomes soft and is more easily pulled out of the cartridge 8.

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 structure of the guide 1 and the structure of the guide 1 in fig. 15 listed here may be combined with the structures of the embodiments shown in fig. 5 to 14 to obtain a new technical solution, and both fall within the scope of the present invention.

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.

When the guiding device of the utility model is adopted, the following use method can be adopted:

s100: disposing the guide 1 in the first state to the distal end side 81 of the cartridge 8;

s200: operating the stapler such that the guide 1 enters the tissue interior with the cartridge 8;

s300: expanding the guide 1 to become voluminous into the second state;

s400: pulling the guide towards the proximal side of the stapler removes the guide 1 in the second state from the distal side 81 of the cartridge 8.

In this embodiment, the hardness of the guide 1 in the first state is greater than the hardness in the second state, and when the guide 1 is expanded to have a larger volume in the step S300, the hardness of the guide 1 may be decreased to be soft. Further, in this embodiment, in the step S300, when the guide 1 is expanded to increase the volume, the guide may be brought into the second state by an external force, or the guide 1 may be brought into contact with a liquid, and the liquid may be absorbed and expanded to increase the volume and soften the hardness. In other alternative embodiments, the guide member 1 may be inflated, etc., and all of them fall within the scope of the present invention. Specifically, in step S300, the guide is contacted with a liquid, such as the guide 1 is contacted with a body fluid inside the tissue, or a liquid (such as physiological saline, pure medical water, etc.) is injected into the cartridge, and a water tube, a syringe, etc. may be used for the injection.

Therefore, in steps S100 and S200, in the initial state, the guide member is in the first state with relatively high hardness, and the guide member is at least partially located at the distal end side of the cartridge, which can provide a good guiding function for the cartridge to enter the inside of the tissue, reduce the damage to the tissue during the movement of the cartridge assembly, and protect the stump tissue and the mucosal layer of the tissue. In step S300, after the cartridge enters the tissue, when the guide member contacts the liquid, the guide member absorbs the liquid at least partially and then becomes less rigid, so that the guide member enters the second state with relatively less rigidity, and when the cartridge reaches the surgical position, the guide member is in the second state which is relatively soft, and at this time, by pulling the guide member in the proximal direction of the stapler in step S300, the guide member can be pulled in the proximal direction conveniently, so that the guide member is separated from the distal side of the cartridge, the surgical procedure is not affected, and the surgical operation is very simple and convenient.

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, which can well guide a nail bin assembly to enter tissues, reduce the damage to the tissues in the moving process of the nail bin assembly and protect the stump tissues and the mucous membrane layer of the tissues; the guide piece can be softened after being contacted with liquid and can be pulled more easily to move towards the direction of the proximal end side of the anastomat, so that the guide piece can be conveniently removed from the distal end side of the nail bin assembly after reaching an operation position, the firing process of the anastomat cannot be hindered, the operation is simple, and the 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 (19)

1. A guide device is characterized in that the nail box component is used for a circular tube type anastomat, the nail box component comprises a nail barrel, the side wall of the nail barrel is provided with at least one window, the guide device comprises a guide part, and the guide part is at least partially arranged on the far end side of the nail barrel;

the guide has a first state and a second state, the guide being fixed relative to the cartridge when the guide is in the first state, the guide having a first volume; the guide may be separable from the cartridge through the window when the guide is in the second state, the guide having a second volume, the second volume being greater than the first volume.

2. The guide device of claim 1, wherein when the guide member is in the first state and in contact with the liquid, the guide member at least partially absorbs the liquid and then becomes larger in volume, so that the guide member enters the second state and the rigidity of the guide member becomes smaller.

3. The guide device of claim 2, 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.

4. Guide device according to claim 3, wherein the guide element is a compression fabric.

5. Guide means according to claim 2, wherein the outer wall surface of the guide means is at least partially coated with a hydrophobic coating.

6. The guide device according to claim 3, wherein in the first state, the guide is a structure in which the filler material is compressed in the axial direction of the cartridge, and when the guide is in contact with the liquid, the guide absorbs the liquid to extend in the axial direction of the cartridge.

7. 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.

8. The guide device of claim 7, wherein the locating portion is an interference fit with an inside wall of the cartridge.

9. The guide device according to claim 7, wherein the guide portion, the positioning portion, and the pull-out portion are integrally formed.

10. The guide device of claim 7, wherein the stapler further comprises an elbow disposed on a proximal side of the cartridge, the guide device further comprising a protective sheath at least partially covering an outer side of the elbow;

the proximal end side of the pulling part extends out of the window and extends to the bent pipe, and the part of the pulling part corresponding to the bent pipe is located between the outer side surface of the bent pipe and the inner side surface of the protective sleeve.

11. The guide device of claim 7, further comprising a flexible outer sleeve disposed over the exterior of the guide member, the outer sleeve being fixedly coupled to the guide member;

the outer cover comprises a first outer cover portion and a second outer cover portion which are integrally formed, the first outer cover portion is sleeved on the outer side of the guide portion, and the second outer cover portion is at least partially sleeved on the outer side of the positioning portion.

12. The guide device according to claim 11, wherein the positioning portion includes an outer sheath engaging portion on a distal end side and a cartridge engaging portion on a proximal end side, the second outer sheath portion being fitted over an outer side of the outer sheath engaging portion, an outer diameter of the outer sheath engaging portion being smaller than an outer diameter of the cartridge engaging portion.

13. Guide means according to claim 7, wherein the outer edge of the proximal side of the positioning portion is provided with a chamfer.

14. The guiding device as defined in claim 7, wherein a catch is provided at a proximal end side of the pulling portion, the catch being fixed at the window and not protruding from an outer side surface of the cartridge.

15. The guide device of claim 7, wherein a cavity is formed in the guide member and extends through at least a proximal face of the guide member in an axial direction of the cartridge.

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

17. The guide device of claim 1, wherein in the first state, a maximum outer diameter of the guide is less than or equal to an outer diameter of the distal side of the cartridge.

18. The guide device of claim 1, wherein the guide member is configured with a plurality of air holes, the guide member is in the first state, and when the guide member is in contact with the liquid, the guide member expands in at least one direction after at least partially absorbing the liquid, and the air holes increase in volume to bring the guide member into the second state.

19. Circular tube-type anastomat, characterized in that it comprises a guide device according to any one of claims 1 to 18.

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