End effector assembly and surgical instrument

Abstract

The utility model provides an end portion actuator assembly and surgical instrument, can solve the problem of reducing the intensity of pressure of cutting tissue and avoiding the problem of blocking in the pushing process of a cutting knife, the end portion actuator assembly comprises a nail bin assembly and a nail abutting seat which can move relatively to achieve opening and closing, the nail bin assembly comprises a nail bin, the cutting knife and a knife pushing mechanism, and the nail bin assembly is connected with the nail abutting seat. Slide ways arranged in the moving direction of the cutting knife are arranged on the nail bin assembly and the nail abutting base respectively, sliding blocks corresponding to the slide ways are arranged on the cutting knife respectively, when the cutting knife moves, the sliding blocks are matched with the slide ways to limit the nail bin assembly and the nail abutting base, and sliding block protrusions are arranged on the side faces, making contact with the slide ways, of the sliding blocks. A plurality of slide way protrusions which are arranged at intervals and correspond to the slide block protrusions are arranged on the slide way, and when the cutting knife moves, the slide block protrusions and the slide way protrusions are matched so that the cutting knife can shake up and down at the same time to achieve tissue cutting.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical instrument technical field, in particular to a kind of end effector assembly and surgical instrument. BACKGROUND

[0002] Anastomat is a kind of surgical instrument, for quickly and safely connecting tissue together in surgical procedure, usually used to replace traditional hand sewing, and is widely applied to various types of surgery.Anastomat has staple cartridge inside, which is equipped with prearranged suture nail, for internal tissue anastomosis, and is equipped with cutting knife, cutting knife cooperates with suture nail, and built-in cutting knife also starts along predetermined path of staple cartridge as suture nail is pushed out.Cutting knife is located between two rows of suture nails of staple cartridge, and it realizes accurate cutting along the center line of tissue.As cutting knife starts working after suture nail has been pushed into tissue, it can ensure that incision edge is immediately closed by suture nail, to prevent bleeding or body fluid leakage.

[0003] In prior art, such as Figures 1 to 3 The schematic diagram of end effector assembly of existing anastomat is shown, referring to Figure 2 、 Figure 3 It can be seen that upper slider 121 of cutting knife 120 is in surface contact with abutting seat 200, lower slider 121 of cutting knife 120 is in surface contact with staple cartridge assembly 100, cutting knife 120 presents linear motion along predetermined path, and presents straight cut when cutting tissue, and cutting knife is completely dependent on pushing force applied to cutting knife by instrument and sharpness of cutting knife to cause pressure on tissue, so as to make tissue off, and elastic modulus of tissue is very low, which leads to that tissue disperses force after being stressed;When cutting knife is in linear motion, micro serration of cutting edge is easy to be stuck in tissue, especially when encountering tough part in tissue, it is more likely to be stuck, and stuck can cause additional damage to tissue, affect postoperative recovery, and seriously increase risk of postoperative complications. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing an end effector assembly and surgical instrument with the same, to solve the technical problems of reducing pressure on cutting tissue and avoiding stuck during pushing of cutting knife.

[0005] The technical scheme is as follows: a kind of end effector assembly, the end effector assembly includes the staple cartridge assembly and the anvil that can be relatively moved to realize open and close, the staple cartridge assembly includes staple cartridge, cutting knife and push knife mechanism, on the staple cartridge assembly and the anvil, respectively, be provided with the slide along the direction of movement of the cutting knife, the cutting knife is respectively provided with slider corresponding the slide, the cutting knife is positioned when moving by the slider and the slide cooperation the staple cartridge assembly and the anvil, it is characterized in that: on the side of the slider and the slide contact, slider protrusion is equipped, corresponding the slider protrusion on the slide is equipped with several interval arrangement slide protrusion, when the cutting knife moves, the slider protrusion and slide protrusion are mutually cooperated so that the cutting knife can be shaken up and down simultaneously to realize cutting tissue.

[0006] Further, recess is formed between the adjacent two slide protrusions, the size of the recess is such that the slider protrusion can be embedded in the recess.

[0007] Further, when the slider protrusion arranged towards the staple cartridge assembly is directly opposite and abuts against the slide protrusion on the staple cartridge assembly, the slider protrusion arranged towards the anvil is embedded in the recess between the slide protrusions on the anvil; when the slider protrusion arranged towards the anvil is directly opposite and abuts against the slide protrusion on the anvil, the slider protrusion arranged towards the staple cartridge assembly is embedded in the recess between the slide protrusions on the staple cartridge assembly.

[0008] Further, the slider protrusions are spaced apart on the slider.

[0009] Further, the cutting knife and the push knife mechanism are movably connected.

[0010] Further, the push knife mechanism includes a cutting knife connecting portion, the cutting knife connecting portion is provided with a clamping groove, the cutting knife is provided with a clamping portion capable of being inserted into the clamping groove, and the clamping portion and the clamping groove are gap fitted to enable the cutting knife to shake up and down relative to the push knife mechanism.

[0011] Further, the clamping portion is provided with a mounting hole, and a limiting screw passes through the mounting hole and cooperates with a limiting nut to lock and position the clamping portion.

[0012] Further, the mounting hole is a threaded hole, and the limiting screw and the limiting nut are larger than the size of the clamping groove.

[0013] Further, the staple cartridge is provided with a knife groove, and the cutting knife can move along the knife groove between the proximal end and the distal end of the staple cartridge under the driving of the push knife mechanism.

[0014] A surgical instrument comprising an end effector assembly as described above.

[0015] The end effector assembly of the utility model, through setting mutually matched convex structure between the slider on the cutting knife and the slide on the nail bin assembly and the nail abutment, make the cutting knife can produce slight up-down displacement while advancing along the predetermined path, such design imitates the "saw cutting" action when cutting by hand, instead of pure straight cutting, reduce the direct confrontation between the cutting blade and the tissue, reduce the pressure required for cutting, realize the sliding cutting mode, can reduce the frictional resistance between the cutting blade and the tissue, make the cutting blade can pass through the tissue more smoothly, avoid the tissue tearing or other forms of damage caused by jamming, realize the sliding cutting through the up-down shaking of the cutting knife, compared with straight cutting, the sliding cutting is easier to cut off and separate the tissue, improve the cutting efficiency;

[0016] In the utility model, the movable connection between the cutting knife and the knife pushing mechanism allows the cutting knife to have a certain degree of freedom relative to the knife pushing mechanism, can move up and down within a certain range, can further support the up-down shaking of the cutting knife, help to improve the cutting efficiency, and can also ensure the consistency and accuracy of cutting. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an exploded view of the end effector assembly in the existing anastomat;

[0018] Figure 2 It is a sectional view schematic diagram of the end effector assembly in the existing anastomat;

[0019] Figure 3 It is Figure 2 It is an enlarged schematic diagram of A in the utility model;

[0020] Figure 4 It is a sectional view schematic diagram of an end effector assembly provided in the embodiment;

[0021] Figure 5 It is a front view of a cutting knife provided in the embodiment;

[0022] Figure 6 It is a perspective view of a cutting knife provided in the embodiment;

[0023] Figure 7 It is a front view of a cutting knife and a knife pushing mechanism cooperation provided in the embodiment;

[0024] Figure 8 It is a perspective view of a cutting knife and a knife pushing mechanism cooperation provided in the embodiment;

[0025] Figure 9Fig. 1 is a schematic view of a slider block protrusion on a cutting knife mating with a slide channel protrusion on an end effector assembly, part 1;

[0026] Figure 10 Fig. 2 is a schematic view of a slider block protrusion on a cutting knife mating with a slide channel protrusion on an end effector assembly, part 2;

[0027] Reference Signs:

[0028] 100, staple cartridge assembly;

[0029] 200, anvil;

[0030] 300, slide channel;

[0031] 110, staple cartridge;

[0032] 120, cutting knife;

[0033] 121, slider block;

[0034] 122, slider block protrusion;

[0035] 123, buckle portion;

[0036] 124, mounting hole;

[0037] 125, limiting screw;

[0038] 126, limiting nut;

[0039] 130, cutting knife pushing mechanism;

[0040] 131, cutting knife connecting portion;

[0041] 132, clamping groove;

[0042] 140, staple cartridge base;

[0043] 150, staple pushing slider;

[0044] 301, slide channel protrusion;

[0045] 302, recess. DETAILED DESCRIPTION

[0046] The purposes, technical solutions and advantages of the present application will be clearer, and the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0047] See Figures 4 to 10In the embodiment of the utility model, provide a kind of end effector assembly, end effector assembly includes the staple cartridge assembly 100 and the staple seat 200 that can be relatively moved to realize open and close, staple cartridge assembly includes staple cartridge 110, cutting knife 120 and push knife mechanism 130, staple cartridge 110 is equipped with knife groove, cutting knife 120 can be driven by push knife mechanism 130, along knife groove between the proximal end and the distal end of staple cartridge movement, cutting knife 120 movement direction is set on the slide 300 of staple cartridge assembly 100 and the staple seat 200, four are set on the transverse two sides of knife groove, slider 121 is set on the transverse two sides of cutting knife 120, respectively correspond four slide 300 settings on staple cartridge assembly 100 and the staple seat 200, cutting knife 120 is positioned by slider 121 and slide 300 cooperation in vertical direction to staple cartridge assembly 100 and the staple seat 200, so that end execution component can be well clamped the tissue to be cut;

[0048] In the embodiment, slider 121 is equipped with slider protrusion 122 on the side that is contacted with slide 300, and a plurality of slide protrusions 301 are arranged on the slide 300 corresponding to the slider protrusion 122. When the cutting knife 120 moves, the slider protrusion 122 and the slide protrusion 301 cooperate with each other to make the cutting knife 120 vibrate up and down at the same time, so that the cutting knife 120 can cut the tissue while vibrating up and down, and the cutting is changed into "sliding" cutting.

[0049] In the prior art, the anastomat mainly relies on the pushing force of the cutting knife and the sharpness of the cutting knife itself when cutting the tissue. The straight cutting method causes a large pressure on the tissue, which easily leads to tissue damage. The end effector assembly in the embodiment sets the slider protrusion and the slide protrusion between the slider on the cutting knife and the slide on the staple cartridge assembly and the staple seat to cooperate with each other, so that the cutting knife can produce slight up-and-down displacement while advancing along the knife groove. The protrusion structure in the embodiment simulates the "sawing" action in manual cutting, rather than simple straight cutting, reduces the direct resistance between the cutting knife edge and the tissue, reduces the pressure required for cutting, realizes the sliding cutting method, reduces the frictional resistance between the cutting knife edge and the tissue, makes the cutting knife edge pass through the tissue more smoothly, avoids the entanglement of the serrated cutting knife edge and the tissue, reduces the jamming phenomenon, avoids the tissue tearing or other forms of damage caused by jamming, reduces the risk of tissue damage and postoperative complications, and improves the safety of the operation and the postoperative recovery effect. The sliding cutting realized by the up-and-down vibration of the cutting knife is easier to cut and separate the tissue than straight cutting. The sliding cutting method makes the cutting knife edge move more smoothly and continuously, improves the cutting efficiency.

[0050] The traditional cutting knife is usually fixedly connected to the knife pushing mechanism, and the position of the cutting knife is relatively fixed during the whole cutting process.In an embodiment of the present application, the cutting knife 120 and the knife pushing mechanism 130 are movably connected, allowing the cutting knife 120 to have a certain degree of freedom relative to the knife pushing mechanism 130 and to move up and down within a certain range.This arrangement in the embodiment not only helps to improve the cutting efficiency, but also ensures the consistency and accuracy of the cutting.

[0051] Referring to Figure 5 、 6 , 7, 8, and specifically in an embodiment, the knife pushing mechanism 130 includes a cutting knife connecting portion 131, the cutting knife connecting portion 131 is provided with a clamping groove 132, and the cutting knife 120 is correspondingly provided with a clamping buckle portion 123 capable of extending into the clamping groove 132.The clamping buckle portion 123 and the clamping groove 132 are gap-fitted to allow the cutting knife 120 to shake up and down relative to the knife pushing mechanism 130.The movable connection mode provided in the embodiment further supports the up-and-down shaking of the cutting knife, enhancing the effect of the sliding cutting.The clamping buckle portion 123 is provided with a mounting hole 124, a limiting screw 125 passes through the mounting hole 124 and cooperates with a limiting nut 126 to lock and limit the clamping buckle portion 123.The mounting hole 124 can be a threaded hole, and the size of the limiting screw 125 and the limiting nut 126 is greater than the size of the clamping groove 132, so as to ensure that the cutting knife will not come off the knife pushing mechanism when shaking up and down, while maintaining the stability of the cutting knife.

[0052] In the embodiment, the limiting screw and the limiting nut are introduced to control the movement range of the clamping buckle portion of the cutting knife, so as to ensure that the cutting knife will not exceed the safe range when shaking up and down, thereby ensuring the cutting effect and avoiding falling due to excessive shaking.The limiting of the limiting screw and the limiting nut ensures the stability and reliability of the cutting knife.

[0053] In an embodiment of the present application, the following arrangement is made: a recess 302 is formed between the adjacent two slide way protrusions 301, and the size of the recess 302 allows the slide block protrusion 122 to be embedded in the recess 302.Through the above arrangement, the slide block protrusion 122 can be smoothly embedded in the recess 302 during the cutting process.When the cutting knife moves along the knife moving groove on the nail cartridge, the slide block protrusion 122 will enter the recess 302 formed by the slide way protrusion 301 in sequence, so that the cutting knife can realize greater up-and-down shaking effect through the cooperation between the slide block protrusion 122 and the recess 302 when moving.When the slide block protrusion 122 moves from one recess 302 to the next recess 302, it will produce greater up-and-down displacement in the transition area between the two, making the cutting more smooth and reducing the risk of tissue damage due to jamming.

[0054] In an embodiment of the utility model, still made following setting: slider convex 122 is spaced apart with a plurality of on slider 121, when slider 121 is equipped with a plurality of interval arrangement's slider convex 122, the plurality of slider convex 122 of arrangement can form multiple-point contact with the slide convex 301 on slide 300, thereby for cutting knife provided more stable support, this multiple-point contact mode can significantly improve the stability of cutting knife movement, make cutting more accurate.

[0055] In an embodiment of the utility model, still made following setting: refer to Figure 9 When slider convex 122 set towards nail bin assembly 100 and slide convex 301 on nail bin assembly 100 are directly opposite and abut when cutting knife moves, slider convex 122 set towards abutting nail seat 200 is just embedded in the pit 302 between slide convex on abutting nail seat 200, refer to Figure 10 When slider convex 122 set towards abutting nail seat 200 and slide convex 301 on abutting nail seat 200 are directly opposite and abut, slider convex 122 set towards nail bin assembly 100 is just embedded in the pit 302 between slide convex on nail bin assembly 100, in combination with Figure 9 And Figure 10 It can be seen that cutting knife presents the motion state of up and down shaking when advancing.

[0056] The end effector in the embodiment of the utility model, wherein nail bin assembly 100 can also include push nail slider 150 and nail bin base 140, nail bin 110 is detachably connected on nail bin base 140, and slide 300 can be arranged on nail bin base 140, thereby realizing detachable installation. Push nail slider 150 is arranged between nail bin 110 and nail bin base 140, when push knife mechanism 130 pushes forward to push cutting knife 130, push nail slider 150 can realize that the suture needle in nail bin 110 is moved to the outside of nail bin when push nail slider 150 moves along the proximal end to the distal end of nail bin 110, and the suture needle is bent and firmly fixed to the tissue.

[0057] In the embodiment of the utility model, a kind of surgical instrument is further provided, surgical instrument is for example: anastomat, anastomat is the commonly used minimally invasive surgical instrument. Surgical instrument in embodiment includes the end effector assembly as described above, the principle of its end effector assembly work is referred to as described above, and here will not be repeated.

[0058] The above is only the embodiment of the present application, and does not limit the present application. Any person skilled in the art, without departing from the technical scheme of the present application, can make many possible changes, modifications or modifications of the technical scheme of the present application disclosed above as equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application shall fall within the scope of protection of the technical scheme of the present application.

Claims

1. An end effector assembly, comprising a staple cartridge assembly (100) and a buttress seat (200) capable of relative movement to achieve opening and closing, the staple cartridge assembly (100) comprising a staple cartridge (110), a cutting knife (120) and a push knife mechanism (130), wherein the staple cartridge assembly (100) and the buttress seat (200) are respectively provided with a slide (300) arranged along the movement direction of the cutting knife (120), and the cutting knife (120) is respectively provided with a sliding block (121) corresponding to the slide (300), and the cutting knife (120) is limited by the sliding block (121) and the slide (300) when moving, characterized in that: A slider bump (122) is arranged on the side of the slider (121) in contact with the slide (300), and a plurality of slide bumps (301) are arranged on the slide (300) corresponding to the slider bump (122), when the cutting knife (120) moves, the slider bump (122) and the slide bump (301) cooperate with each other to make the cutting knife (120) vibrate up and down at the same time to cut the tissue.

2. An end effector assembly according to claim 1, wherein: A recess (302) is formed between two adjacent slide bumps (301), and the size of the recess (302) is such that the slider bump (122) can be embedded in the recess (302).

3. An end effector assembly as claimed in claim 2, wherein: When the slider bump (122) arranged towards the cartridge assembly (100) is directly opposite and abuts against the slide bump (301) on the cartridge assembly (100) when the cutting knife (120) moves, the slider bump (122) arranged towards the anvil (200) is embedded in the recess (302) between the slide bumps (301) on the anvil (200); when the slider bump (122) arranged towards the anvil (200) is directly opposite and abuts against the slide bump (301) on the anvil (200), the slider bump (122) arranged towards the cartridge assembly (100) is embedded in the recess (302) between the slide bumps (301) on the cartridge assembly (100).

4. An end effector assembly as in claim 1, wherein: The slider bump (122) is arranged at intervals on the slider (121).

5. An end effector assembly as claimed in claim 1, wherein: The cutting knife (120) and the knife pushing mechanism (130) are movably connected.

6. An end effector assembly as claimed in claim 5, wherein: The knife pushing mechanism (130) comprises a cutting knife connecting portion (131), and a clamping groove (132) is arranged on the cutting knife connecting portion (131), and a clamping buckle (123) capable of extending into the clamping groove (132) is arranged on the cutting knife (120), and the clamping buckle (123) and the clamping groove (132) are in clearance fit, so that the cutting knife (120) can vibrate up and down relative to the knife pushing mechanism (130).

7. An end effector assembly as claimed in claim 6, wherein: A mounting hole (124) is arranged on the clamping buckle (123), a limiting screw (125) passes through the mounting hole (124) and cooperates with a limiting nut (126) to lock the clamping buckle (123).

8. An end effector assembly as claimed in claim 7, wherein: The mounting hole (124) is a threaded hole, and the size of the limiting screw (125) and the limiting nut (126) is larger than the size of the clamping groove (132).

9. An end effector assembly as claimed in claim 1, wherein: A knife moving groove is arranged on the cartridge (110), and the cutting knife (120) can move between the proximal end and the distal end of the cartridge (110) along the knife moving groove under the drive of the knife pushing mechanism (130).

10. A surgical instrument characterized by: An end effector assembly comprising any one of claims 1 to 9.

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