Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a nail bin assembly and a medical anastomat comprising the same, which are characterized in that anastomat nails are formed on a nail belt, the installation and the replacement are more convenient, and the bumps are arranged, so that the anastomat is convenient to separate from the nail belt body.
The embodiment of the invention provides a nail bin assembly, which is used for a medical anastomat, and comprises at least one nail belt and a plurality of convex blocks, wherein the nail belt comprises a nail belt body extending along the axial direction of the medical anastomat, at least one row of anastomat nails sequentially arranged along the extending direction of the nail belt body are arranged on the nail belt body, and the anastomat is connected to the nail belt body through a connecting end of the anastomat;
The bumps are in one-to-one correspondence with the staples, are positioned at the far end side of the connecting ends of the corresponding staples, and when the medical anastomat is fired, the connecting ends of the staples are contacted with the bumps to disconnect the connection with the staple belt body.
Optionally, the nail belt body is provided with two rows of the anastomotic nails, the two rows of the anastomotic nails are arranged in a staggered manner along the extending direction of the nail belt body, and the protruding blocks corresponding to the two rows of the anastomotic nails are arranged in a staggered manner along the extending direction of the nail belt body.
Optionally, a connecting rod is arranged between the two rows of anastomoses, and the top of the connecting rod is provided with the convex blocks.
Optionally, the nail belt body and the corresponding position of each bump are respectively provided with a bump accommodating opening for accommodating the bump.
Optionally, the distal side of the bump is a ramp that gradually rises from its distal side to its proximal side.
Optionally, the tip of the distal side of the bump transitions smoothly to the top of the bump.
Optionally, the proximal side of the bump is a ramp that gradually rises from its distal side to its proximal side.
Optionally, the proximal side of the bump is formed as a cutting edge.
Optionally, a side surface of the nail belt body facing the nail anvil of the medical anastomat is a nail bin assembly surface, and the top end of the protruding block protrudes out of the nail bin assembly surface.
Optionally, a mating opening is formed on a proximal side of the bump, a connecting beam is provided at a connecting end of the staple, and the connecting beam is located in the mating opening.
Optionally, the cartridge assembly further comprises a fastener to which the distal side of the staple strip is secured.
Optionally, two sides of each row of the staple strips are respectively provided with a limiting piece, the limiting pieces extend along the axial direction of the medical anastomat, and the limiting pieces limit the staple outlet direction of the staples.
Optionally, the nail bin assembly further comprises a nail bin cover, the nail bin cover covers the upper surface of the nail belt body, and nail outlets corresponding to the anastomotic nails one by one are formed in the nail bin cover.
Optionally, the protruding block is arranged at the nail outlet of the nail bin cover, and protrudes out of the lower surface of the nail bin cover.
Optionally, in the initial state, a space is provided between the distal side of the connecting end of the staple and the proximal side of the bump.
The embodiment of the invention also provides a medical anastomat, which comprises any one of the nail bin assemblies.
The nail bin assembly and the medical anastomat comprising the same provided by the invention have the following advantages:
The invention provides a nail bin assembly for a medical anastomat, which is characterized in that an anastomat is formed on a nail belt, the installation and the replacement are more convenient, only the nail belt can be replaced after one operation is finished, and a lug is arranged on a nail belt body, so that the anastomat is convenient to separate from the nail belt body, the anastomat can be separated from the nail bin assembly to anastomose tissues in the operation process, the condition of the anastomat in the operation is avoided, and the operation effect is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.
FIG. 1 is a schematic view of a cartridge assembly according to an embodiment of the present invention mated with an anvil and cartridge assembly frame;
FIG. 2 is a schematic view of a cartridge assembly in accordance with an embodiment of the present invention mated with a cartridge assembly frame;
FIG. 3 is a front view of a cartridge assembly in accordance with an embodiment of the present invention mated with a cartridge assembly frame and body;
FIG. 4 is a left side view of a cartridge assembly in accordance with an embodiment of the present invention mated with a cartridge assembly frame and body;
FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;
FIG. 6 is a schematic view of the cartridge assembly mated with a pusher plate in accordance with one embodiment of the present invention;
FIG. 7 is a schematic view of the structure of FIG. 6 with one side stop removed;
FIGS. 8 and 9 are enlarged views of FIG. 7 at B;
FIG. 10 is a schematic view of the structure of a nail belt according to an embodiment of the present invention;
FIG. 11 is a schematic view of a connecting rod according to an embodiment of the present invention;
FIG. 12 is a schematic view of a projection on a cartridge cap according to another embodiment of the present invention;
fig. 13 is an exploded view of fig. 12.
Reference numerals:
1. 6 connecting rods of nail bin assembly frame
2. First embodiment of anvil assembly 61
3. Distal side of the tab of fastener 611
4. Nail belt 612 mating opening
41. Proximal side of staple 613 tab
411. Puncture end 7 nail pushing block
412. Connection end 71 disconnection portion
42. Push-type knife bar of nail belt body 8
421. Cutter with lug accommodating opening 81
5. Limiting piece 9 body
15. Nail bin cover
16. Nail outlet
17. Second embodiment bump
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.
In order to solve the technical problems in the prior art, the invention provides a nail bin assembly for a medical anastomat and the medical anastomat comprising the same. The nail bin assembly comprises at least one nail belt and a plurality of protruding blocks, the nail belt comprises a nail belt body extending along the axial direction of the medical anastomat, at least one row of anastomat nails sequentially distributed along the extending direction of the nail belt body are arranged on the nail belt body, the anastomat is connected to the nail belt body through connecting ends of the anastomat, the protruding blocks are in one-to-one correspondence with the anastomat, the protruding blocks are located at the far end sides of the connecting ends of the corresponding anastomat, and when the anastomat is fired, the connecting ends of the anastomat are contacted with the protruding blocks to disconnect the connection with the nail belt body, so that the anastomat is separated from the nail belt body.
According to the invention, the anastomotic nails are formed on the nail belt, so that the anastomotic nails can be directly installed into the nail bin assembly by taking the nail belt as a whole during installation, and the nail bin assembly is more convenient to operate. The anastomat is connected to the nail belt body through the connecting end, and in order to realize that the anastomat is more conveniently separated from the nail belt body during operation, the nail belt body is also provided with a lug which is separated from or integrally arranged with the nail belt body. When a doctor holds the operating handle to fire the anastomat, the nail pushing block moves from the proximal end side to the distal end side so as to push the anastomat to be closed and molded, after the anastomat is molded, the connecting end of the anastomat is contacted with the convex block, and the connecting end of the anastomat is separated from the nail belt body under the action of the pushing force of the nail pushing block to the distal end side and the contact force of the convex block, so that the anastomat can be separated from the nail bin assembly.
The structure of a cartridge assembly and a medical stapler according to an embodiment of the present invention will be described with reference to fig. 1 to 11.
As shown in fig. 1 to 5, in this embodiment, the medical stapler includes a cartridge assembly frame 1 and an anvil 2 at a distal end side, a cartridge assembly is mounted in the cartridge assembly frame 1, and a proximal end side of the cartridge assembly frame 1 is connected to a stapler body 9. The nail cartridge assembly comprises two nail belts 4 and a plurality of protruding blocks 61, the nail belts 4 comprise nail belt bodies 42 extending along the axial direction of the medical anastomat, two rows of anastomat 41 sequentially arranged along the extending direction of the nail belt bodies 42 are arranged on the nail belt bodies 42, and the anastomat 41 is connected to the nail belt bodies 42 through connecting ends 412 thereof. The projections 61 are in one-to-one correspondence with staples 41. In a preferred embodiment, the projection 61 is provided to the link 6. The bumps 61 are located on the distal side of the connecting ends 412 of the corresponding staples 41. The staples 41 are disposed on one side of the staple band body 42, the other side of the staple band body 42 is a cartridge assembly surface facing the anvil assembly 2, that is, in the view of fig. 3, the upper surface of the staple band body 42 is a cartridge assembly surface, and the staples 41 are disposed on the lower surface.
The proximal side of the cartridge assembly frame 1 is provided with a push cutter bar 8 and a push staple block 7, and the distal side of the push cutter bar 8 is provided with a cutter 81. A cutter slot is formed between the two nail belts for the cutter 81 to pass through. When a doctor holds an operation handle (not shown in the figure) to fire the anastomat, the push cutter bar 8 pushes the push nail block 7 to move towards the distal end side of the anastomat, the push nail block 7 is sequentially contacted with the anastomat 41, and pushes the anastomat 41 to enable the connecting end 412 of the anastomat 41 to contact with the convex block 61 when the anastomat 41 rotates towards the anvil direction, and the connection between the connecting end 412 of the anastomat 41 and the nail belt body 42 is disconnected under the action of the pushing force of the push nail block 7 and the contact force of the convex block 61, so that the anastomat 41 is separated from the nail belt body 42.
In the present invention, the distal side and the proximal side are relative to the operator, wherein the distal side refers to the end farther from the operator and the proximal side refers to the end nearer to the operator. For example, in the view of fig. 1, the distal side of cartridge assembly frame 1 refers to the left end in the drawing, the proximal side refers to the right end in the drawing, the distal side of anvil 2 refers to the left end in the drawing, and the proximal side refers to the right end in the drawing. The axial direction of the medical stapler refers to a direction from the proximal side to the distal side of the medical stapler, i.e., a direction in which the ribbon body 42 extends in fig. 2. For one part, the inner side refers to the side closer to the axis of the stapler than the outer side.
In this embodiment, the staple tape body 42 of each staple tape 4 is provided with two rows of staples 41, and the two rows of staples 41 are staggered along the extending direction of the staple tape body 42, and the two rows of projections 61 of the same staple tape 4 are staggered along the extending direction of the staple tape body 42 corresponding to the staples 41. In the present invention, the number of the staple strips 4 and the number of the rows of the staples 41 are not limited to this example, and in other alternative embodiments, the number of the staple strips 4 may be reduced or increased, and the number of the rows of the staples 41 may be reduced or increased, which falls within the scope of the present invention.
In this embodiment, the cartridge assembly comprises a distal side fastener 3, a stop 5, a link 6 and a staple strip 4, and the proximal side of the cartridge assembly is further provided with a push block 7. In one production process, the fixing piece 3, the limiting piece 5 and the connecting rod 6 are injection molded by an injection molding process, the limiting piece 5 and the connecting rod 6 are embedded into the fixing piece 3 for injection molding, and then the nail bin assembly is installed, and the proximal end side of the nail bin assembly is welded with the proximal end side of the connecting rod 6. In another process, the fixing member 3 and the connecting rod 6 may be separately provided and then connected together, and then the stapling belt 4 is attached. The distal end side of the nail belt 4 is fixed to the fixing member 3. The distal side of the nail strip 4 may be connected to the fixing member 3 in a non-detachable manner or in a detachable manner. As shown in fig. 5, in order to limit the staple discharging direction of the staples 41, two sides of each row of staple strips 4 are respectively provided with a limiting piece 5 and a connecting rod 6, the limiting pieces 5 and the connecting rod 6 extend along the axial direction of the medical stapler, and the cutter groove is defined between the limiting pieces 5 on two inner sides of the two staple strips 4. The limiting piece 5 and the connecting rod 6 jointly limit the containing space and the staple discharging direction of the staples 41, so that the situation that the staples 41 are blocked due to dislocation in a staple cartridge assembly or deviation in the direction during staple discharging is avoided. In this embodiment, both sides of each staple strip 4 in the axial direction are limited by the limiting member 5 and the connecting rod 6, that is, both sides of each staple 41 in the axial direction are limited by the limiting member 5 or the connecting rod 6, so that when the staples 41 move from the staple cartridge assembly to tissues, the staples are prevented from deviating to the inner side or the outer side of the staple cartridge assembly, that is, under the limiting effect of the limiting member 5 and the connecting rod 6, the staples can only move along the axial direction and cannot deviate from the axial direction. The anastomat 41 further comprises a puncturing end 411, the puncturing end 411 is positioned at one end far away from the connecting end 412, when the anastomat is triggered, the puncturing end 411 of the anastomat 41 moves towards the anvil assembly under the action of the nail pushing block 7, and penetrates out of a space defined between the limiting piece 5 and the connecting rod 6, enters into tissues and is formed on the anvil surface of the anvil assembly 2.
In other alternative embodiments, the tab 61 and the staple band body 42 may be integrally provided, for example, the tab 61 may be formed on the cartridge assembly face of the staple band body 42, or the tab 61 may be welded to the cartridge assembly face of the staple band body 42.
In this embodiment, the projection 61 and the nail belt body 42 may be provided separately. As shown in fig. 6 to 11, a connecting rod 6 is disposed between two rows of staples 41, and the top of the connecting rod 6 is provided with a protruding block 61, that is, the protruding block 61 is disposed on one side of the connecting rod 6 close to the surface of the staple cartridge assembly. The projection 61 protrudes upward from one side of the nail belt body 42. In order to more clearly show the mating structure of the nail strip 4 and the connecting rod 6, the outermost one of the stop members 5 is omitted in fig. 7. Further, the nail belt body 42 is provided with a protrusion receiving opening 421 for receiving the protrusion 61 at a position corresponding to each protrusion 61. The projection 61 protrudes from the cartridge assembly surface by penetrating from the projection receiving opening 421. The link 6 may also define together with the stop 5 the receiving space and the staple discharge direction of the staples 41. When the staples 41 are fired, both sides are simultaneously guided by the side surfaces of the limiting piece 5 and the side surfaces of the connecting rod 6, so that the staples can smoothly penetrate out of the openings on the surface of the staple belt body 42, and the phenomenon of staples caused by deflection deviating from the axial direction can not occur. The stopper 5 and the link 6 are preferably made of a relatively hard metal, such as stainless steel.
Because in the prior art, a single staple is adopted, each staple is independently arranged in one staple hole, and the problem of positioning the staples does not exist. In the structure using the staple tape 4, however, since each individual staple hole is not provided, it is necessary to further solve the problem of positioning the staples 41 in the staple tape 4. As shown in fig. 8, in this embodiment, linkage 6 may also define, along with stop 5, the position of staples 41 in the cartridge assembly. I.e. each row of staples 41 is arranged between its one side stop 5 and one side link 6. Each two adjacent links 6 and stop 5 together define a staple receiving space in the axial direction of the stapler. The up-and-down movement of the staples 41 is limited only in this staple accommodating space, and is not deviated to one side of the stopper 5 nor to one side of the link 6. In the process that the staples 41 move to the cartridge assembly surface and are separated from the staple belt body 42, the movement direction of the staples 41 is also limited by the connecting rod 6 and the limiting piece 5, so that the staples 41 can be accurately positioned at the position on the tissues to be anastomosed.
Therefore, this embodiment not only solves the problem of easy detachment of the staples 41 in the staple tape 4 at the time of surgery, but also further solves the problem of positioning the staples 41 in the staple tape 4.
In this embodiment, the distal side 611 of the bump 61 is a slope gradually rising from the distal side to the proximal side, and the distal side 611 is provided smoothly as a whole, i.e. the top of the distal side 611 smoothly transitions to the top of the bump 61, for example, a smooth chamfer is provided between the distal side 611 and the top of the bump 61 to prevent the sharp corner from damaging the tissue when the stapler is closed. The proximal side 613 of the protrusion 61 opposite to the distal side 611, i.e., the proximal side 613 adjacent to the connection end 412, is also formed as a slope gradually rising from the distal side to the proximal side to enhance the mating effect with the connection end 412. Further, proximal side 613 may be formed as a cutting edge to enhance the shearing effect on connection end 412. In a preferred embodiment, in the initial state, a certain distance is provided between the connecting end 412 and the proximal side 613, so as to ensure that the staples 41 are deformed during rotation, not blocked by the proximal side 613, and not separated from the staple tape until the staples are not completely formed.
As shown in fig. 8 to 11, a mating opening 612 is formed on the proximal side of the protruding block 61, a connecting beam is disposed at the connecting end 412 of the staple 41, and the connecting beam is located in the mating opening 612, i.e. in a direction from the proximal side toward the distal side, the protruding block 61 at least partially coincides with the connecting end 412, so as to increase the contact area between the connecting end 412 of the staple 41 and the protruding block 61 when the staple is separated from the staple strip 4. In this embodiment, the push block 7 is a wedge-shaped push block 7, and the push block 7 has a breaking portion 71 corresponding to the connecting end 412 of the staple 41. As shown in fig. 9, when the stapler is fired, the staple pusher 7 pushes the staples in the distal direction by the pusher bar 8, that is, the staple 41 is pushed by the pusher 7 in the distal direction of fig. 9, the piercing end 411 of the staple 41 moves toward the anvil assembly 2, the piercing end 411 of the staple 41 rotates about the connecting end 412 as the anvil assembly 2, the connecting beam contacts the proximal side of the bump 61 in the direction D in fig. 9, the connecting beam applies a force to the bump 61 in the distal direction of the stapler, and the bump 61 applies a reaction force to the connecting beam in the direction E in fig. 9, thereby detaching the connecting beam of the staple 41 at the bump 61, detaching the staple 41 from the cutter blade 4, forming the staple 41 at the anvil surface of the anvil assembly 2, and simultaneously moving the cutter blade 81 from the proximal side to the distal side in the stapling groove to detach tissue, thereby achieving detachment and severing of tissue.
As shown in fig. 12 and 13, the structure of a cartridge assembly in accordance with another embodiment of the present invention is shown. This embodiment differs from the previous embodiment in that the tab 61 is not provided on the linkage but on the cartridge cover 13. As shown in fig. 12, the cartridge assembly further includes a cartridge cover 15, the cartridge cover 15 covers the upper surface of the staple belt body 42, and the cartridge cover 15 is provided with staple outlets 16 corresponding to the staples 41 one by one. Upon stapling of staples 41, piercing end 411 of staples 41 protrudes from staple exit 16 toward anvil assembly 2. The projection 61 is provided at the outlet 16 of the cartridge cover 15, and the projection 61 protrudes from the lower surface of the cartridge cover 15 toward the staples 41.
The nail bin assembly and the medical anastomat comprising the same provided by the invention have the following advantages:
The invention provides a nail bin assembly for a medical anastomat, which is characterized in that an anastomat is formed on a nail belt, the installation and the replacement are more convenient, only the nail belt can be replaced after one operation is finished, and a lug is arranged on a nail belt body, so that the anastomat is convenient to separate from the nail belt body, the anastomat can be separated from the nail bin assembly to anastomose tissues in the operation process, the condition of the anastomat in the operation is avoided, and the operation effect is improved.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.