Anastomat

Abstract

The utility model provides an anastomat which comprises a nailing structure, a plurality of fixing structures and a plurality of fixing structures, the nailing structure comprises a plurality of anastomosis nails, and the anastomosis nails are distributed in the target direction of the nailing structure; the cutting assembly comprises a cutting knife body and a cutting knife head, a blade part is arranged on the cutting knife head, and the cutting knife head is movably connected to the cutting knife body; the driving mechanism is connected with the cutting knife body; during cutting, the driving mechanism drives the cutting assembly to move in the target direction; and meanwhile, the cutting tool bit generates angular displacement in the target direction. The angular displacement of the cutting tool bit improves the cutting effect, the target cutting tissue is prevented from being torn under the pressure of the cutting tool bit, the damage to the blade part in the cutting process is reduced, and the safety in the operation process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and particularly relates to an anastomat. BACKGROUND

[0002] The anastomat is a minimally invasive surgical device commonly used in surgery, which replaces traditional manual suturing and is mainly applied to organ stump closure and incision anastomosis in minimally invasive surgical treatment.

[0003] The existing anastomat also includes a cutting function, which can cut the tissue while suturing. The cutting mode of the cutting knife in the existing anastomat is to set a blade part on the head, and the blade part extrudes the tissue under the action of external force for cutting. However, this cutting mode greatly damages the blade part, easily causes adverse phenomena such as blade collapse and blade curling of the cutting knife, and affects the sharpness of the blade part. In addition, the extrusion cutting mode has a pulling effect on the tissue during the cutting process. If the blade part is used in an adverse condition, the extrusion on the cutting knife will be intensified. When the cutting knife reaches the yield strength limit, the blade body will be curled and broken, causing a serious medical accident.

[0004] The information disclosed in this section of the background art is only intended to increase the understanding of the overall background of the present application, and should not be considered as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the purpose of the present application is to provide an anastomat. The problem of damage to the blade part during cutting of the anastomat is solved, the risk of medical accidents caused by the cutting knife is reduced, and the cutting effect is improved.

[0006] To achieve the above-mentioned purpose, the present application provides an anastomat, which comprises: a stapling structure, the stapling structure comprising a plurality of anastomotic staples, the plurality of anastomotic staples being distributed along a target direction; the target direction being the length direction of the stapling structure;

[0007] a cutting assembly, comprising a cutting knife body and a cutting knife head, the cutting knife head being provided with a blade part, and the cutting knife head being movably connected to the cutting knife body;

[0008] a driving mechanism, the driving mechanism being connected to the cutting knife body;

[0009] During cutting, the driving mechanism drives the cutting assembly to move along the target direction; at the same time, the cutting knife head generates angular displacement in the target direction.

[0010] In one or more embodiments, the anastomat further comprises:

[0011] A first transmission assembly is connected to the cutting head, and the cutting head generates a unidirectional angular displacement in the target direction.

[0012] In one or more embodiments, the first transmission assembly includes:

[0013] A gear, which is connected to the cutting head and rotates about the same center of rotation;

[0014] A rack meshes with a gear, and the driving mechanism drives the cutting blade to move along the target direction. The cutting blade drives the cutting head to move linearly along the rack, while the cutting head rotates.

[0015] In one or more embodiments, the first transmission assembly further includes:

[0016] A first motor, connected to the cutting head, drives the cutting head and the cutting body to generate a unidirectional angular displacement in the target direction.

[0017] In one or more embodiments, the rack is mounted within the engagement structure along the target direction.

[0018] In one or more embodiments, the cutting blade includes:

[0019] The cutting blade body has a mounting part at its end, and the mounting part has a through hole;

[0020] The cutting structure further includes a connecting pin, and the cutting head has a mounting hole in the axial direction, with the connecting pin passing through the mounting hole and the through hole.

[0021] In one or more embodiments, the cutting assembly includes two cutting heads, which are symmetrically arranged along the cutting blade body;

[0022] The two cutting heads are arranged in parallel and a cutting gap is formed between the two cutting heads;

[0023] The first transmission component drives the two cutting heads to move synchronously.

[0024] In one or more embodiments, the cutting head and the cutting body are connected with a clearance fit between their opposing surfaces.

[0025] In one or more embodiments, the stapler further includes:

[0026] handle;

[0027] An outer tube, one end of which is connected to the handle, and the other end of which is connected to the engagement structure;

[0028] The drive structure includes a second motor and a third transmission assembly, with one end of the second motor and one end of the third transmission assembly connected, and the other end of the third transmission assembly connected to the cutting assembly;

[0029] The second motor is located inside the handle, and the third transmission assembly and the cutting assembly are located inside the outer tube.

[0030] In one or more embodiments, the cutting angle of the blade is 15°-20°.

[0031] Compared with the prior art, the stapler according to this application has the following advantages:

[0032] The cutting blade and cutting head are driven by a drive mechanism to move along the target direction. The anastomotic staples are distributed in the target direction of the stapling structure. The cutting assembly cuts the target tissue along the target direction and anastomoses the target tissue. During the process, the cutting head is angularly displaced in the target direction, that is, the cutting head moves in a straight line while making angular cuts. This can improve the cutting effect, avoid the target tissue from being torn under the pressure of the cutting head, and reduce damage to the blade during the cutting process, thereby improving the safety of the operation. Attached Figure Description

[0033] Figure 1 This is a partial structural schematic diagram of an anastomosis device according to an embodiment of this application;

[0034] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0035] Figure 3 This is a partial internal structure diagram of a stapler according to an embodiment of this application;

[0036] Figure 4 Figure 3 Enlarged view at point E in the middle;

[0037] Figure 5 This is a partial structural diagram of the cutting assembly of a stapler according to an embodiment of this application;

[0038] Figure 6 This is a side view of a cutting blade according to an embodiment of this application;

[0039] Figure 7 This is a schematic diagram of the structure of a cutting blade according to an embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the cutting assembly of a stapler according to an embodiment of this application;

[0041] Figure 9 yes Figure 8 Cross-sectional view at point BB;

[0042] Figure 10 This is a partial structural schematic diagram of the drive structure of the stapler according to an embodiment of this application;

[0043] Figure 11 This is a partial structural schematic diagram of the fastening structure according to an embodiment of this application;

[0044] Figure 12 yes Figure 11 Cross-sectional view at point C;

[0045] Figure 13 This is a schematic diagram of the internal structure of a stapler according to an embodiment of this application.

[0046] Explanation of key figure labels:

[0047] 1. Anastomosis device; 10. Cutting structure; 2. Cutting assembly; 21. Cutting blade; 211. Mounting part; 212. Mounting hole; 213. Connecting pin; 22. Cutting head; 221. Blade; 222. Through hole; 223. Protrusion; 30. Drive mechanism; 31. Gear; 32. Rack; 33. Second motor; 34. Screw; 35. Threaded sleeve; 36. Transmission rod; 361. Mating part; 4. Stapling structure; 41. Anastomosis staple; 42. Staple cartridge seat; 421. Pusher groove; 43. Abutment seat; 5. Handle; 6. Outer tube. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0049] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] like Figure 1 , Figure 2 , Figure 5 and Figure 8 As shown, a stapler 1 according to an embodiment of this application includes: a stapler structure 4 and a cutting component 2. The stapler structure 4 includes a plurality of staples 41, which are distributed along a target direction, the length direction of the stapler structure 4. During the operation of the stapler 1, the target direction of the stapler structure 4 is aligned with the target tissue to be cut. The cutting component 2 cuts the target tissue along the target direction, and the plurality of staples 41 close the target tissue along the target direction, completing one operation of the stapler 1. In the figure, the X direction is the target direction.

[0051] The cutting assembly 2 includes a cutting blade 21 and a cutting head 22. The cutting head 22 is provided with a cutting edge 221. The cutting head 22 is movably connected to the cutting blade 21, so the cutting head 22 can move with the cutting blade 21 and can also move relative to the cutting blade 21.

[0052] The anastomosis device 1 also includes a drive mechanism 30, which is connected to the cutting blade 21. During cutting, the drive mechanism 30 drives the cutting assembly 2 to move along the target direction, while the cutting head 22 and the cutting blade 21 generate angular displacement in the target direction. The cutting head 22 moves on the target tissue and makes angular displacement during the movement, thereby achieving the cutting of the target tissue.

[0053] During the operation of the stapler 1, the cutting head 22 simultaneously travels linearly in the target direction of the stapled structure 4, and the cutting edge 221 on the cutting head 22 has an angular displacement relative to the target direction, thereby completing the cutting. During the cutting process, the staples 41 merge the cut positions. The angular displacement of the cutting head 22 generates an angular cutting force. Compared with the compressive cutting force in the prior art, the angular cutting force can improve the cutting effect, avoid the target tissue from being torn under the compressive cutting force of the cutting head 22, and reduce damage to the cutting edge 221 during the cutting process, thereby improving the safety of the surgical procedure.

[0054] like Figure 5 and Figure 9As shown, in a specific embodiment, the cutting assembly 2 includes two cutting blades 22, which are symmetrically arranged along the cutting blade body 21. The two cutting blades 22 are arranged in parallel and form a cutting gap between them. The cutting blade body 21 is located between the two cutting blades 22, and the cutting edge 221 of the cutting blade 22 facing the target direction needs to extend beyond the projection area of ​​the cutting blade body 21 in order to apply cutting force to the target tissue. Therefore, the two cutting blades 22 have a portion that extends beyond the projection area of ​​the cutting blade body 21, and a cutting gap is formed between the extended portions of the two cutting blades 22.

[0055] It should be noted that the tensile strength requirement for the cutting head 22 is relatively high throughout the cutting process. With the material of the cutting head 22 fixed, the thicker the cutting head 22, the higher the tensile strength. If the cutting edge 221 of the cutting head 22 is located in the middle of the cutting head 22, the thickness of the cutting head 22 needs to increase with the length of the cutting edge 221, which will occupy a lot of space, increase the manufacturing difficulty, and form a stress concentration point at the tip of the cutting edge 221. From the body of the cutting head 22 to the tip of the cutting edge 221, the thickness of the cutting head 22 decreases sharply, which reduces the tensile performance and makes the cutting head 22 prone to breakage. Therefore, two cutting heads 22 are set and symmetrically arranged on both sides of the cutting body 21. A thinner cutting head 22 is used, and the cutting edge 221 is distributed on the edge of the cutting head 22 to ensure that the cutting head 22 meets the tensile performance and ensures the balance of the force applied during the cutting process.

[0056] In a specific embodiment, the cutting angle of the blade 221 is 15°-20°.

[0057] Conventional cutting blades used for extrusion cutting, besides considering sharpness, also need to consider the tensile strength and durability of the blade edge. Therefore, the cutting angle is relatively large. In this embodiment, the angular displacement cutting method increases the durability of the blade edge, thus minimizing the cutting angle and achieving better sharpness. Experiments have shown that setting the cutting angle to 15°-20° provides both good sharpness and durability.

[0058] Specifically, the cutting angle of the blade can be 15°, 16°, 18° or 20°.

[0059] In a specific embodiment, the relative surfaces of the cutting blade body 21 and the cutting head 22 are connected with a clearance fit to ensure that the cutting head 22 can move freely relative to the cutting blade body 21.

[0060] In a specific embodiment, such as Figure 8 and Figure 9As shown, the cutting blade body 21 is provided with a mounting part 211, and the mounting part 211 is provided with a mounting hole 212. A through hole 222 is provided in the axial direction of the cutting head 22. A connecting pin 213 passes through the mounting hole 212 and the through hole 222 to realize the movable connection between the cutting blade body 21 and the cutting head 22, so that when the cutting blade body 21 moves, the cutting head 22 moves with the cutting blade body 21. At the same time, the cutting head 22 can also make angular displacement relative to the cutting blade body 21.

[0061] To achieve angular cutting by the cutting head 22, in one specific embodiment, a first transmission assembly is also included. The first transmission assembly is connected to the cutting head 22, and the cutting head 22 and the cutting blade 21 generate unidirectional angular displacement in the target direction. Through unidirectional angular displacement, the cutting head 22 continuously performs angular cutting on the target tissue, ensuring the continuity of angular cutting during the linear movement of the cutting assembly 2 and improving cutting efficiency.

[0062] In one specific embodiment, such as Figure 3 , Figure 4 As shown, the first transmission assembly includes a gear 31 and a rack 32. The drive mechanism 30 is connected to the cutting blade 21. The drive mechanism 30 drives the cutting blade 21 and the cutting head 22 to move linearly along the target direction. The cutting head 22 is connected to the gear 31 and rotates at the same rotation center. The cutting head 22 and the gear 31 move synchronously. When the cutting head 22 moves linearly, it drives the gear 31 to move linearly. At the same time, the gear 31 also meshes with the rack 32. Therefore, the gear 31 moves linearly along the rack 32. During this process, due to the meshing of the gear 31 and the rack 32, the gear 31 rotates itself. The gear 31 drives the cutting head 22 to rotate together, realizing the angular cutting of the cutting head 22.

[0063] By utilizing the meshing of gear 31 and rack 32, the cutting head 22 can simultaneously perform linear motion and rotation, and 36 does not require additional power input. This transforms the squeezing cutting into angular cutting, improving the cutting effect, avoiding damage to the blade 221 during surgery, and enhancing the safety of the surgical procedure.

[0064] Furthermore, the gear 31 coincides with the axis of the cutting head 22, so that the cutting head 22 and the gear 31 rotate at the same angular velocity. The rotational speed of the cutting head 22 can be controlled by setting data such as the number of teeth and / or module of the gear 31 and the rack 32.

[0065] Furthermore, such as Figure 6 and Figure 7 As shown, the side of gear 31 is attached to the side of cutting head 22. Gear 31 and cutting head 22 are fixedly connected by welding or bonding, or gear 31 and cutting head 22 are an integrated structure.

[0066] In a specific embodiment, two cutting heads 22 are symmetrically arranged on both sides of the cutting body 21, and the gear 31 is arranged on the side of the cutting head 22 away from the cutting body 21. Therefore, the rack 32 is also arranged on the side of the cutting head 22 away from the cutting body 21. During the movement of the cutting body 21 along the rack 32, it does not interact with the rack 32, thus ensuring the stability of the movement process.

[0067] In one specific embodiment, the rack 32 is installed inside the engagement structure 4 and arranged along the target direction of the engagement structure 4, so that the meshing gear 31 moves in a straight line along the target direction, thereby improving the integration of the stapler 1.

[0068] In another specific embodiment, the first transmission component includes a first motor, which is connected to the cutting head 22 and drives the cutting head 22 and the cutting body 21 to generate a unidirectional angular position relative to the target direction.

[0069] The drive mechanism 30 serves as the drive source for the linear motion of the cutting head 22, and the first motor serves as the drive source for the rotation of the cutting head 22. The rotation speed of the cutting head 22 can be controlled independently, and it has good adaptability when cutting target cutting areas with different hardness and structures.

[0070] To achieve angular cutting with the cutting head 22, in another specific embodiment, the drive mechanism 30 further includes a second transmission assembly connected to the cutting head 22. The cutting head 22 and the cutting blade 21 reciprocate angularly in the target direction. The cutting edge 221 of the cutting head 22 performs the cutting process by repeatedly moving on the target tissue.

[0071] In a specific embodiment, the second transmission component includes a toothed portion and a drive gear 31. The toothed portion is disposed at one end of the cutting head 22, and the other end of the cutting head 22 is provided with a cutting edge 221. The drive gear 31 meshes with the toothed portion and rotates back and forth. The toothed portion meshing with it also moves repeatedly on the drive gear 31. The cutting head 22 is hinged to the cutting body 21. When the toothed portion rotates repeatedly, the cutting head 22 swings repeatedly in a direction around the hinge point, causing the cutting edge 221 to reciprocate in an angular displacement.

[0072] Specifically, a third motor drives the drive gear 31 to reciprocate, or a handle is provided, which is connected to the drive gear 31, and the operator manually operates the reciprocating movement of the handle.

[0073] In one or more embodiments, such as Figure 13As shown, the stapler 1 also includes a handle 5 and an outer tube 6. One end of the outer tube 6 is connected to the handle 5, and the other end of the outer tube 6 is connected to the stapler structure 4. The drive mechanism 30 includes a second motor 33 and a third transmission assembly. One end of the second motor 33 and the third transmission assembly are connected, and the other end of the third transmission assembly is connected to the cutting assembly 2. The second motor 33 is located inside the handle 5, and the third transmission assembly and the cutting assembly 2 are located inside the outer tube 6.

[0074] In a specific embodiment, such as Figure 8 and Figure 10 As shown, the third transmission assembly includes a screw 34, a threaded sleeve 35, and a transmission rod 36. A second motor 33 is connected to the threaded sleeve 35, which is fitted onto the screw 34 and engages with the screw 34's threads. The second motor 33 drives the threaded sleeve 35 to rotate, which in turn drives the screw 34 to move linearly. The screw 34 then drives the transmission rod 36 to move linearly. The drive mechanism 30 also includes a screw. One end of the screw 34 has an outwardly flared portion, and one end of the transmission rod 36 has a recessed portion. The outwardly flared portion fits into the recessed portion, and the screw passes through the sidewalls of the outwardly flared portion and the recessed portion, thus fixing the screw 34 and the transmission rod 36 together. The other end of the transmission rod 36 has a mating portion 361, and one end of the cutting blade 21 has a protrusion 223. The mating portion 361 and the protrusion 223 engage, fixing the transmission rod 36 and the cutting blade 21 together in the linear movement direction. The transmission rod 36 drives the cutting blade 21 to move linearly. Driven by electricity, the cutting component 2 performs the cutting process on the target tissue. It has a simple structure and high reliability.

[0075] During the cutting process, cutting is applied from the starting point to the ending point of the expected cutting trajectory of the target tissue. Driven by the second motor 33, the cutting blade 21 moves from the starting point to the ending point, and the cutting head 22 moves accordingly to perform the cutting.

[0076] In a specific embodiment, such as Figure 1 , Figure 2 , Figure 11 and Figure 12 As shown, the stapler structure 4 includes multiple staples 41, a staple cartridge seat 42, and a stop seat 43. The staple cartridge seat 42 has multiple staple slots for placing the staples 41. A pusher groove 421 is formed along the length of the staple cartridge seat 42. The staple cartridge seat 42 can move towards the stop seat 43 to clamp and fix the target tissue. The cutting blade 21 and the cutting head 22 can move along the pusher groove 421. Figure 11 and Figure 12 The X direction shown is the target direction.

[0077] The stapler 1 also includes a staple pushing mechanism, which includes a staple pushing plate connected to one end of the cutting assembly 2 near the cutting head 22. When the cutting assembly 2 and the staple pushing plate move along the pusher groove 421, the staples 41 are pushed out of the groove.

[0078] During the use of the stapler 1, the staple cartridge seat 42 and the abutment seat 43 first fix the target tissue in the target direction, and determine the cutting direction of the tissue as the target direction. The cutting component 2 in the cutting structure 10 is oriented towards the target direction, and the cutting blade 21 and the cutting head 22 are driven to move along the target direction. At the same time, the cutting head 22 is angularly displaced in the target direction to cut the target tissue. During the cutting process, the pusher plate moves linearly with the cutting component 2 and interacts with the staples 41 during the movement, thereby pushing the staples 41 so that they emerge from the staple groove, closing the fixed target tissue and achieving the purpose of removing the lesion.

[0079] In a specific embodiment, the anastomotic staple 41 is parallel to the staple cartridge seat 42 in height direction, and the staple groove is an open structure at both ends, with part of the anastomotic staple 41 exposed at the bottom of the staple groove. Taking the forward direction during the anastomosis operation as the front end, the staple pusher plate includes a ramp surface, and the height gradually increases from the front end to the rear end. When the staple pusher plate moves forward, the ramp surface lifts the anastomotic staple 41, thereby pushing the anastomotic staple 41 out of the staple groove.

[0080] In a specific embodiment, the stapler 1 also includes a body, the stapled structure 4 is installed at the operating end of the body, the cutting component 2 and part of the driving mechanism 30 are located inside the body near the operating end. During the cutting process, the driving mechanism 30 drives the cutting component 2 to move from the inside of the body to the stapled structure 4. The cutting head 22 is located at the end of the cutting blade 21 closer to the stapled structure 4. The cutting head 22 cuts at the front end of the cutting component 2 in the direction of movement.

[0081] The foregoing description of specific exemplary embodiments of this application is for illustrative and explanatory purposes. These descriptions are not intended to limit this application to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of this application and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of this application, as well as various different choices and variations. The scope of this application is intended to be defined by the claims and their equivalents.

Claims

1. A stapler, characterized in that, include: A stapled structure, the stapled structure comprising a plurality of staples, the plurality of staples being distributed along a target direction; The target direction is the length direction of the fastening structure; A cutting assembly includes a cutting blade and a cutting head, wherein the cutting head is provided with a cutting edge and is movably connected to the cutting blade; A drive mechanism is connected to the cutting blade body; During cutting, the drive mechanism drives the cutting assembly to move along the target direction; at the same time, the cutting head generates angular displacement in the target direction.

2. The stapler as described in claim 1, characterized in that, Also includes: A first transmission assembly is connected to the cutting head, and the cutting head generates a unidirectional angular displacement in the target direction.

3. The stapler as described in claim 2, characterized in that, The first transmission assembly includes: A gear, which is connected to the cutting head and rotates about the same center of rotation; A rack meshes with a gear, and the driving mechanism drives the cutting blade to move along the target direction. The cutting blade drives the cutting head to move linearly along the rack, while the cutting head rotates.

4. The stapler as described in claim 2, characterized in that, The first transmission assembly also includes: A first motor, connected to the cutting head, drives the cutting head and the cutting body to generate a unidirectional angular displacement in the target direction.

5. The stapler as described in claim 3, characterized in that, The rack is installed within the engagement structure along the target direction.

6. The stapler as described in claim 1, characterized in that, The cutting blade includes: The cutting blade body has a mounting part at its end, and the mounting part has a through hole; The cutting structure further includes a connecting pin, and the cutting head has a mounting hole in the axial direction, with the connecting pin passing through the mounting hole and the through hole.

7. The stapler as described in claim 2, characterized in that, The cutting assembly includes two cutting heads, which are symmetrically arranged along the cutting blade body; The two cutting heads are arranged in parallel and a cutting gap is formed between the two cutting heads; The first transmission component drives the two cutting heads to move synchronously.

8. The stapler as described in claim 7, characterized in that, The cutting head and the cutting body are connected by a clearance fit between their opposing surfaces.

9. The stapler as claimed in claim 1, characterized in that, Also includes: handle; An outer tube, one end of which is connected to the handle, and the other end of which is connected to the engagement structure; The drive structure includes a second motor and a third transmission assembly, with one end of the second motor and one end of the third transmission assembly connected, and the other end of the third transmission assembly connected to the cutting assembly; The second motor is located inside the handle, and the third transmission assembly and the cutting assembly are located inside the outer tube.

10. The stapler as claimed in claim 1, characterized in that, The cutting angle of the blade is 15°-20°.

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