Nail cartridge assembly and medical stapler including the same

Abstract

The present invention provides a stapler assembly and a medical stapler including the same, wherein the stapler assembly includes at least one stapler band, the stapler band includes a stapler band body extending in the axial direction of the medical stapler, the stapler band body is provided with at least one row of staples sequentially arranged along the extension direction of the stapler band body; and stoppers are located on both sides of the stapler band, the stoppers extend in the extension direction of the stapler band body, and the stoppers and the stapler band body define a accommodating space for the staples. By adopting the present invention, staples are formed on a stapler band, and installation is more convenient. The stoppers on both sides of the stapler band realize the position limitation of the staples in the stapler assembly and the limitation of the stapler ejection direction when the stapler is fired.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a staple cartridge assembly and a medical stapler comprising the same. Background Art

[0002] Digestive tract diseases are one of the most common diseases in humans. During the treatment process, medical staplers are often used to replace the doctor's manual operation to anastomose physiological tissues such as the digestive tract. Medical staplers are a common surgical instrument, most of which use axial internal stapling to form end-to-end or end-to-side anastomosis of physiological tissues such as the esophagus, stomach, and intestines during surgery. During the anastomosis, the two sections of tissue are contained in the medical stapler. After the firing is completed, a circular anastomosis is formed on the tissue, reconstructing the human body channel.

[0003] In the prior art, a medical stapler includes a medical stapler body, an operating handle movably connected to the medical stapler body, and a staple anvil assembly matched with the body. The medical stapler body includes a stapler magazine assembly and a stapler magazine frame arranged on the distal side. In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther from the operator, that is, the end closer to the surgical site is the distal side. During surgery, the stapler magazine assembly and the stapler anvil assembly are closed, and the operating handle is held to push the staples toward the tissue, and the tissue is stapled by the formation of the staples in the stapler magazine assembly at the stapler anvil assembly.

[0004] In the existing staple cartridge assembly, the staples are mostly separately arranged one by one. However, such staples need to be individually installed in the staple holes of the staple cartridge assembly, which is very inconvenient to install. Summary of the invention

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a staple magazine assembly and a medical stapler including the same, in which staples are formed on a staple belt, which is more convenient to install, and the position of the staples is limited by the limiting pieces on both sides of the staple belt.

[0006] An embodiment of the present invention provides a staple cartridge assembly, comprising at least one staple band, wherein the staple band comprises a staple band body extending along the axial direction of the medical stapler, and the staple band body is provided with at least one row of staples sequentially arranged along the extending direction of the staple band body;

[0007] The limiting pieces are located on both sides of the staple band, and the limiting pieces extend along the extending direction of the staple band body. The limiting pieces and the staple band body define a containing space for the staples.

[0008] Optionally, the staples include two rows of staples, and the two rows of staples are respectively arranged close to two side edges of the staple band.

[0009] Optionally, the staples include puncture ends, and positions on both sides of the staple band body corresponding to each puncture end are retracted inwards to define a staple exit space of the staples together with the adjacent limiting members.

[0010] Optionally, both side edges of the distal end of the nail belt body are in contact with the limiting members on both sides respectively, and the upper surface of the limiting members is flush with the upper surface of the nail belt body.

[0011] Optionally, a connecting rod extending along the extension direction of the staple belt body is further provided between the two rows of staples, and a accommodating space for the staples is defined between the connecting rod and the limiting member.

[0012] Optionally, the nail magazine assembly includes two nail bands and four limiting members respectively arranged on both sides of the two nail bands: a first limiting member and a fourth limiting member located on the outside and a second limiting member and a third limiting member located on the inside, and a cutting groove is defined between the inner sides of the second limiting member and the third limiting member.

[0013] Optionally, in the proximal side view of the nail magazine assembly, an angle is formed between the end surface center axes of the first limiting member and the fourth limiting member.

[0014] Optionally, an inner side surface of the second limiting member is parallel to an inner side surface of the third limiting member.

[0015] Optionally, in the proximal side view of the nail magazine assembly, an angle is formed between the outer side surface of the second limit member and the inner side surface of the second limit member, and an angle is formed between the outer side surface of the third limit member and the inner side surface of the third limit member.

[0016] Optionally, in the proximal side view of the nail magazine assembly, the outer side surface of the second limiting member is parallel to the end surface center axis of the first limiting member, and the outer side surface of the third limiting member is parallel to the end surface center axis of the second limiting member.

[0017] Optionally, the nail magazine assembly also includes a nail pushing block arranged on the proximal side of the limiting member, and the top end of the nail pushing block on the side that cooperates with each of the limiting members is formed with a chamfered structure, and the side of each of the limiting members that cooperates with the nail pushing block is formed with an inclined surface that cooperates with the chamfered structure.

[0018] Optionally, the nail magazine assembly further includes a fixing member, and the distal end side of the limiting member is fixed to the fixing member.

[0019] An embodiment of the present invention further provides a medical stapler, which includes the stapler cartridge assembly.

[0020] The stapler assembly and the medical stapler including the stapler assembly provided by the present invention have the following advantages:

[0021] The present invention provides a stapler cartridge assembly for a medical stapler, wherein staples are formed on a staple belt, so that installation and replacement are more convenient. After an operation is completed, only the staple belt can be replaced. Limiting pieces are arranged on both sides of the staple belt to limit the accommodating space of the staples, so as to avoid the staples being misplaced in the stapler cartridge assembly. Furthermore, the limiting piece and the staple belt body can jointly limit the stapler ejection space, so as to ensure that the staples are ejected in a predetermined direction during anastomosis, so as to avoid the staples being stuck or the stapler anastomosis position being deviated when the stapler is fired, thereby improving the operation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the cooperation between a nail magazine assembly, a nail anvil and a nail magazine frame according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the cooperation between a nail magazine assembly and a nail magazine frame according to an embodiment of the present invention;

[0025] Figure 3 This is a front view of the nail magazine assembly, the nail magazine frame and the main body in cooperation with one embodiment of the present invention;

[0026] Figure 4 It is a left side view of the nail magazine assembly, the nail magazine frame and the main body in accordance with an embodiment of the present invention;

[0027] Figure 5 yes Figure 4 Sectional view in the AA direction;

[0028] Figure 6 It is a structural schematic diagram of the cooperation between the nail magazine assembly and the nail pushing block according to one embodiment of the present invention;

[0029] Figure 7 yes Figure 6 A schematic diagram of the structure after removing the limiter on one side;

[0030] Figure 8 is a top view of a staple cartridge assembly according to an embodiment of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the cooperation between the limiting member and the pin pushing block according to one embodiment of the present invention;

[0032] Fig.10 and Fig.11 It is a proximal side view of a limiting member and a nail pushing block in a nail magazine assembly according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1 Nail magazine frame 521 Inner side of the second limiting member

[0035] 2 Anvil assembly 522 Outer surface of the second limiting member

[0036] 3 Fixing member 531 Inner side of the third limiting member

[0037] 4 Nail strip 532 The outer side of the third limiting member

[0038] 41 staples 55 matching bevel

[0039] 411 piercing end 6 connecting rod

[0040] 412 connection end 61 bump

[0041] 42 nail belt body 7 nail push block

[0042] 421 bump receiving opening 71 separation portion

[0043] 422 Indentation surface 72 Chamfer structure

[0044] 43 stapler accommodation space 81 cutter

[0045] 44 nailing space 82 knife push rod

[0046] 51-54 Limiting piece 83 Cutting knife groove

[0047] 9 body DETAILED DESCRIPTION

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0049] In order to solve the technical problems in the prior art, the present invention provides a stapler assembly for a medical stapler and a medical stapler including the stapler assembly. The stapler assembly includes: at least one staple band, the staple band includes a staple band body extending along the axial direction of the medical stapler, one side of the staple band body is provided with at least one row of staples arranged in sequence along the extension direction of the staple band body; and stoppers located on both sides of the staple band, the stoppers extend along the extension direction of the staple band body, and the stoppers and the staple band body define a space for accommodating the staples.

[0050] The present invention forms the staples on a staple belt, and during installation, the staple belt can be directly installed as a whole into the staple magazine assembly, and the staple magazine assembly is more convenient to operate. In the existing single staple structure, each staple is confined in a staple hole. In the structure using the staple belt, there is no structure of the staple hole. In order to limit the position of the staples of the staple belt, limiting members are also provided on both sides of the staple belt to limit the accommodating space of the staples, thereby avoiding the misalignment of the staples in the staple magazine assembly. When the stapler is fired, the staples are pushed out toward the anvil assembly in the limited space, which also ensures that the staples are ejected in a predetermined direction during anastomosis, thereby avoiding the situation where the staples are stuck or the staple anastomosis position deviates when the stapler is fired.

[0051] Combine the following Figures 1 to 11 The structure of the stapler assembly and the stapler in one embodiment of the present invention is described in detail.

[0052] like Figures 1 to 3 As shown, in this embodiment, the stapler includes a stapler body 9, and the distal end of the stapler body 9 is a stapler frame 1 and a staple anvil assembly 2, and the stapler frame 1 is provided with a stapler assembly. Figures 1 to 8 As shown, the stapler assembly includes two stapler strips 4, each of which includes a stapler strip body 42 extending along the axial direction of the medical stapler, and each of which is provided with two rows of staples 41 arranged in sequence along the extending direction of the stapler strip body 42. Therefore, in this embodiment, a plurality of staples 41 are formed on one stapler strip 4, which is more convenient to use. Among them, the number of stapler strips 4 and the number of rows of staples 41 on each stapler strip 4 are examples. In other alternative embodiments, the number of stapler strips 4 can be increased or decreased as needed, and the number of rows of staples 41 on the stapler strip 4 can be increased or decreased, all of which are within the protection scope of the present invention.

[0053] In order to limit the position of the staples 41 in the staple magazine assembly and the direction in which the staples 41 are ejected, the limiting members 51 to 54 are located on both sides of the staple belt 4. The limiting members 51 to 54 extend along the extension direction of the staple belt body 42. The limiting members 51 to 54 and the staple belt body 42 define the accommodating space 43 for the staples 41. The staple accommodating space 43 is a space defined along the axial direction of the stapler, that is, it mainly limits the staples 41 from deviating in the direction toward the axis of the stapler or away from the axis of the stapler. The upper surface of the staple magazine assembly is the staple magazine surface. When the stapler is fired, when the staples 41 move from the staple magazine surface toward the anvil, they are also limited by the limitation of the staple accommodating space 43, and no deviation to the outside or inside is found.

[0054] 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 closer to the operator. Figure 1 In the perspective of FIG. 1 , the distal side of the stapler frame 1 refers to the left end in the figure, the proximal side refers to the right end in the figure, the distal side of the stapler anvil assembly 2 refers to the left end in the figure, and the proximal side refers to the right end in the figure. The axial direction of the medical stapler refers to the direction from the proximal side of the medical stapler to the distal side, that is, Figure 2 The direction in which the middle nail belt body 42 extends. For a component, its inner side refers to the side closer to the axis of the stapler relative to its outer side.

[0055] In this embodiment, the staple cartridge assembly further comprises a fixing member 3, and the distal ends of the limiting members 51 to 54 are fixed to the fixing member 3. Similarly, the distal ends of the limiting members 51 to 54 may be non-detachably connected to the fixing member 3, or may be detachably connected to the fixing member 3.

[0056] In this embodiment, the staple 41 includes a puncture end 411 and a connection end 412, and the staple 41 is connected to the staple belt body 42 via the connection end 412. Both sides of the staple belt body 42 corresponding to each of the puncture ends 411 are indented inwardly. Figure 7 As shown, indentation surfaces 422 are formed on both sides of the stapler body 42. A corresponding indentation surface 422 is provided at the position of each staple 41, and the indentation surface 422 and the adjacent limiting members 51 to 54 together define the stapler outlet space 44 of the stapler 41. The stapler magazine assembly also includes a stapler pusher block 7 located on the proximal side of the limiting members 51 to 54. When the stapler is fired, the stapler 41 is pushed toward the distal side of the stapler by the stapler pusher block 7 on the proximal side, and the puncture end 411 of the stapler 41 rotates toward the stapler anvil with the connecting end 412 as the axis, and the puncture end 411 passes through the stapler outlet space 44 and extends out of the stapler magazine surface, and after passing through the tissue, is formed on the stapler anvil of the stapler anvil assembly 2 to achieve tissue anastomosis. The limitation of the staple extraction space 44 can further ensure that the direction of the staple 41 will not deviate to the outside or inside when it is extracted, and during the extraction process of the staple 41, the puncture end 411 can smoothly pass through the staple extraction space 44 under the guidance of the side surfaces of the limiting members 51 to 54 without the staple getting stuck.

[0057] In this embodiment, the two sides of the distal end of the nail belt body 42 are in contact with the two side limiters 51-54 respectively, and the upper surfaces of the limiters 51-54 are flush with the upper surface of the nail belt body 42. Figure 5In the perspective of the upper surface of the stopper 51-54, that is, the surface of the stopper 51-54 facing the nail anvil assembly 2, the upper surface of the nail belt body 42, that is, Figure 5 From the perspective of FIG. 4 , the nail band body 42 faces the upper surface of the nail anvil assembly 2, that is, the nail magazine surface.

[0058] In this embodiment, the two rows of staples 41 are respectively arranged near the two sides of the staple belt 4. In order to further limit the accommodation space 43 of the staples 41, a connecting rod 6 extending along the extension direction of the staple belt body 42 is further arranged between the two rows of staples 41 of each staple belt 4, and the accommodating space 43 of the staples 41 is defined between the connecting rod 6 and the stopper. Figure 7 and Figure 8 As shown, during the process of stapler 41 being ejected, stapler 41 is guided by the side surfaces of stoppers 51 to 54 and connecting rod 6 at the same time, and staple jamming will not occur, thereby ensuring that stapler 41 can smoothly pass through the staple magazine surface from the predetermined ejection space 44.

[0059] In this embodiment, the nail magazine assembly includes two nail bands 4 and four limit members 51 to 54 respectively arranged on both sides of the two nail bands 4: a first limit member 51 and a fourth limit member 54 located on the outside and a second limit member 52 and a third limit member 53 located on the inside, and a cutting groove 83 is defined between the inner sides of the second limit member 52 and the third limit member 53.

[0060] The proximal side of the staple cartridge assembly is provided with a cutter 81, a knife pusher rod 82 and a staple pusher block 7, and the top end of the staple pusher block 7 is provided with a disconnection portion 71 corresponding to the connection end 412 of the staple 41. The staple belt body 42 is also provided with a convex block receiving opening 421 corresponding to the connection end 412 of each staple 41, and the connecting rod 6 is provided with a plurality of convex blocks 61, and each convex block 61 passes through the corresponding convex block receiving opening 421. When the stapler is fired, the doctor holds the operating handle, and the knife push rod 82 pushes the cutter 81 and the stapler pushing block 7 toward the distal side of the stapler. The connecting end 412 is pushed toward the distal side by the disconnection portion 71 of the stapler pushing block 7, moves toward the distal side and contacts the proximal side of the protrusion 61. Under the action of the reaction force of the protrusion 61 and the thrust of the disconnection portion 71, the connecting end 412 of the staple 41 is disconnected, so that the staple 41 is easily separated from the staple band body 42.

[0061] like Fig. 9 and Fig.10As shown, in this embodiment, in the proximal side view of the staple cartridge assembly, there is an angle m between the end face center axis of the first stopper 51 and the fourth stopper 54. The angle m can be selected to be 10° to 30°, and is further preferably 18° to 22°, so as to ensure full use of the space inside the stapler assembly, increase the lip edge of the tissue anastomosis after anastomosis, and ensure the safety and reliability of the anastomosis. In the proximal side view of the staple cartridge assembly, the outer side surface 522 of the second stopper 52 is parallel to the end face center axis of the first stopper 51, and the outer side surface 532 of the third stopper 53 is parallel to the end face center axis of the fourth stopper 54, that is, there is also an angle n between the outer side surface 522 of the second stopper 52 and the outer side surface 532 of the third stopper 53, and the angle n can be equal to the angle m. In other alternative embodiments, the angle n and the angle m can also be different.

[0062] If the inner side surface of the second limit member 52 and the inner side surface of the third limit member 53 also have the same angle n, a V-shaped open space will be formed between the second limit member 52 and the third limit member 53, that is, the cutting knife groove 83 is a groove with a V-shaped end surface. When the cutter 82 moves from the proximal side to the distal side of the stapler through the cutting knife groove 83 to cut the tissue, when the tissue to be operated on is relatively thick, the tissue may enter the cutting knife groove 83 during the closing process. The V-shaped cutting knife groove will inevitably accommodate more tissue, making it difficult for the cutter 82 to retreat from the distal side to the initial position. Therefore, in this embodiment, the inner side surface 521 of the second limit member 52 is set to be parallel to the inner side surface 531 of the third limit member 53, and parallel to the side wall of the cutter. Fig.10 As shown, the inner side surface 521 of the second limiting member 52 and the inner side surface 531 of the third limiting member 53 are preferably perpendicular to the staple cartridge surface of the staple cartridge assembly, and the second limiting member 52 and the third limiting member 53 are structures similar to an inverted trapezoid.

[0063] In this embodiment, in the proximal side view of the staple cartridge assembly, there is an angle y between the outer side 522 of the second stopper 52 and the inner side 521 of the second stopper 52, and the angle can be selected as y=n / 2. There is an angle x between the outer side 532 of the third stopper 53 and the inner side 532 of the third stopper 53, and the angle can be selected as x=n / 2. The end faces of the second stopper 52 and the third stopper 53 are inverted right-angled trapezoidal faces. That is, by designing the shapes of the second stopper 52 and the third stopper 53, a cutting groove 82 with a rectangular end face is formed. When the cutter 82 cuts the tissue, no excessive tissue will enter the cutting groove 83, which facilitates the cutter 82 to return to the initial position again.

[0064] like Fig. 9 and Fig.10As shown, in this embodiment, the nail pushing block 7 is a fan-shaped nail pushing block 7 adapted to the accommodating space of the staples 41, and the nail pushing block 7 includes four nail pushing plates, which are respectively axially aligned with a row of the staples 41, so as to more conveniently push the staples 41 out of the staple magazine assembly when the stapler is fired.

[0065] like Fig.10 and Fig.11 , which shows the matching structure of the push nail block 7 and the limiting members 51 to 54. In this embodiment, the top end of the side where the push nail block 7 matches with each of the limiting members 51 to 54 is formed with a chamfered structure 72, and the side where each of the limiting members 51 to 54 matches with the push nail block 7 is formed with an inclined surface 55 that matches with the chamfered structure.

[0066] The stapler assembly and the medical stapler including the stapler assembly provided by the present invention have the following advantages:

[0067] The present invention provides a stapler cartridge assembly for a medical stapler, wherein staples are formed on a staple belt, so that installation and replacement are more convenient. After an operation is completed, only the staple belt can be replaced. Limiting pieces are arranged on both sides of the staple belt to limit the accommodating space of the staples, so as to avoid the staples being misplaced in the stapler cartridge assembly. Furthermore, the limiting piece and the staple belt body can jointly limit the stapler ejection space, so as to ensure that the staples are ejected in a predetermined direction during anastomosis, so as to avoid the staples being stuck or the stapler anastomosis position being deviated when the stapler is fired, thereby improving the operation effect.

[0068] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A nail magazine assembly, characterized in that: For a medical stapler, the staple cartridge assembly comprises: At least one staple band, the staple band comprising a staple band body extending in the axial direction of the medical stapler, the staple band body being provided with at least one row of staples sequentially arranged in the extending direction of the staple band body, the staples comprising a puncture end and a connection end, the staples being connected to the staple band body through the connection end, when the staples are subjected to a thrust in the distal direction, the puncture end of the staples rotates toward the staple anvil of the stapler with the connection end as an axis, the puncture end extends out of the staple cartridge surface of the staple cartridge assembly and passes through the tissue, and is formed on the staple anvil, and when the connection end is separated by the thrust in the distal direction, the staples are separated from the staple band body; The limiting pieces are located on both sides of the staple band, and the limiting pieces extend along the extending direction of the staple band body. The limiting pieces and the staple band body define a containing space for the staples.

2. The staple cartridge assembly according to claim 1, characterized in that: The anastomosis staples include two rows of anastomosis staples, and the two rows of anastomosis staples are respectively arranged close to two side edges of the staple belt.

3. The staple cartridge assembly according to claim 2, characterized in that: The positions of both side edges of the staple band body corresponding to each puncture end are retracted inwards to define the staple exit space of the staples together with the adjacent limiting members.

4. The staple cartridge assembly according to claim 3, characterized in that: The two side edges of the distal end of the nail belt body are in contact with the limiting members on both sides respectively, and the upper surface of the limiting members is flush with the upper surface of the nail belt body.

5. The staple cartridge assembly according to claim 4, characterized in that: A connecting rod extending along the extending direction of the staple belt body is further provided between the two rows of staples, and a accommodating space for the staples is defined between the connecting rod and the limiting member.

6. The staple cartridge assembly according to claim 1, characterized in that: The nail magazine assembly includes two nail strips and four limiting members respectively arranged on both sides of the two nail strips: a first limiting member and a fourth limiting member located on the outside and a second limiting member and a third limiting member located on the inside, and a cutting groove is defined between the inner sides of the second limiting member and the third limiting member.

7. The staple cartridge assembly according to claim 6, characterized in that: In the proximal side view of the staple cartridge assembly, an angle is formed between the end surface center axes of the first limiting member and the fourth limiting member.

8. The staple cartridge assembly according to claim 6 or 7, characterized in that: An inner side surface of the second limiting member is parallel to an inner side surface of the third limiting member.

9. The staple cartridge assembly according to claim 8, characterized in that: In the proximal side view of the nail magazine assembly, an angle is formed between the outer side surface of the second limiting member and the inner side surface of the second limiting member, and an angle is formed between the outer side surface of the third limiting member and the inner side surface of the third limiting member.

10. The staple cartridge assembly according to claim 9, characterized in that: In the proximal side view of the nail magazine assembly, the outer side surface of the second limiting member is parallel to the end surface center axis of the first limiting member, and the outer side surface of the third limiting member is parallel to the end surface center axis of the second limiting member.

11. The staple cartridge assembly according to claim 6, characterized in that: The nail magazine assembly also includes a nail pushing block arranged on the proximal side of the limiting member, and the top end of the nail pushing block on the side that cooperates with each of the limiting members is formed with a chamfered structure, and the side of each of the limiting members that cooperates with the nail pushing block is formed with an inclined surface that cooperates with the chamfered structure.

12. The staple cartridge assembly according to claim 1, characterized in that: The nail magazine assembly also includes a fixing member, and the distal end side of the limiting member is fixed on the fixing member.

13. A medical stapler, characterized in that: A nail magazine assembly comprising any one of claims 1 to 12.

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