Jaw assembly and powered anastomotic device

Abstract

The application discloses a jaw assembly and an electric anastomat, and relates to the technical field of anastomosers, which comprises a butt seat support, a nail bin support, a butt seat, a nail bin, a plurality of suture nails and a plurality of forming parts. A driving assembly is arranged in the butt seat support; the nail bin support is hingedly connected to the butt seat support; the butt seat is fixedly connected to the butt seat support, a plurality of butt nail grooves are formed in the butt seat, and the driving assembly can drive the nail bin support and the butt seat to be close to each other; the nail bin is detachably connected to the nail bin support, a plurality of nail outlet holes are formed in the nail bin, the nail outlet holes can be aligned with corresponding butt nail grooves; the suture nails are installed in the corresponding nail outlet holes, the driving assembly is used for pushing the suture nails to leave the nail outlet holes and enter the corresponding butt nail grooves; the forming parts are installed in the corresponding butt nail grooves, and the forming parts can make the suture nails entering the butt nail grooves to be curved into a spiral shape. The application can avoid excessive squeezing of tissues and improve the hemostatic effect.

Description

Technical Field

[0001] This invention relates to the field of stapler technology, and particularly to a jaw assembly and an electric stapler. Background Technology

[0002] The stapler, a handheld surgical instrument for tissue cutting and suturing, primarily works by using titanium staples to sever, anastomose, connect, and suture tissue, reducing or eliminating bleeding from soft tissue during the cutting process. The stapler includes a handle assembly, a transmission assembly, and an end effector. The end effector comprises a staple cartridge assembly and an anvil. The staple cartridge assembly includes a slider, a staple pusher, and a cutting blade. The staple cartridge has a groove for the cutting blade to pass through. The handle assembly has a trigger, button, or push button for controlling the cutting blade. During operation, the tissue is placed between the staple cartridge assembly and the anvil. Activating the trigger causes the anvil of the end effector to pivot towards the staple cartridge assembly, clamping the tissue. Once clamped, the push button controls the cutting blade to move along the groove of the anvil, cutting the tissue. The cutting blade and slider move synchronously, the slider pushing the staple pusher up from the staple cartridge, and the staple pusher inserts titanium staples into the tissue, achieving tissue suturing. However, the existing anvil groove structure is simple. After the existing suture staples enter the anvil groove, they can only bend into an approximate B-shape, which is not effective in stopping bleeding and is prone to causing excessive compression of tissue, resulting in a long postoperative recovery time for the wound. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a clamp assembly and an electric stapler that can avoid excessive tissue compression and improve hemostasis.

[0004] According to a first aspect of the present invention, a jaw assembly includes: an anvil support, a staple cartridge support, an anvil, a staple cartridge, a plurality of staples, and a plurality of shaping portions. A driving assembly is disposed inside the anvil support; the staple cartridge support is hinged to the anvil support; the anvil is fixedly connected to the anvil support, and the anvil has a plurality of anvil slots; the driving assembly can drive the staple cartridge support and the anvil to move closer together; the staple cartridge is detachably connected to the staple cartridge support, and the staple cartridge has a plurality of staple ejection holes, which can be aligned with corresponding anvil slots; the staples are installed in corresponding staple ejection holes, and the driving assembly is used to push the staples away from the staple ejection holes and into corresponding anvil slots; the shaping portions are installed in corresponding anvil slots, and the shaping portions can bend the staples entering the anvil slots into a spiral shape.

[0005] According to an embodiment of the present invention, a jaw assembly has at least the following advantages: the anvil groove matches the staple outlet hole, enabling the drive assembly to push the staple away from the staple outlet hole and into the corresponding anvil groove; multiple shaping parts are installed in the corresponding anvil grooves, and the shaping parts can bend a portion of the staple entering the anvil groove into a spiral shape. In this invention, the shaping parts are provided in the anvil grooves, causing the ends of the staples to bend into a spiral shape, reducing pressure on the sutured tissue and making the staples more reliably fixed in the tissue.

[0006] According to some embodiments of the present invention, the suture staple is C-shaped, and pre-formed portions are provided at both ends of the suture staple near the anvil, and the two pre-formed portions are bent toward each other.

[0007] According to some embodiments of the present invention, a pusher plate is provided in the nail outlet hole, the pusher plate can be driven by a drive assembly to push the suture nail away from the nail outlet hole, and an arc-shaped pusher auxiliary forming groove is provided on the side of the pusher plate near the suture nail.

[0008] According to some embodiments of the present invention, each of the suture staples corresponds to two of the anvil grooves, and the anvil grooves are arranged in multiple rows along the length direction of the anvil seat, with each adjacent row of anvil grooves being staggered.

[0009] According to some embodiments of the present invention, the forming part is at least partially made of a plastically deformable material, and as the suture staple enters the anvil groove, the forming part gradually deforms, causing the radius of curvature of the suture staple to gradually increase.

[0010] According to some embodiments of the present invention, the cross-section of the anvil groove is rectangular, a first arc surface is provided inside the anvil groove, and a second arc surface is provided in the forming part. The radius of curvature of the second arc surface is smaller than the radius of curvature of the first arc surface. During the process of the suture staple entering the anvil groove, the suture staple first contacts the first arc surface and then contacts the second arc surface.

[0011] According to some embodiments of the present invention, the forming part is engaged in the anvil groove.

[0012] According to some embodiments of the present invention, the two ends of the same suture staple bend in opposite directions after entering the anvil groove.

[0013] According to some embodiments of the present invention, the molding part is a composite material with a biodegradable biomedical polymer material as a carrier and an anti-inflammatory and antibacterial drug as a sustained-release agent.

[0014] Some embodiments of the present invention also provide an electric stapler, comprising: the jaw assembly described above, a blade assembly connected to the jaw assembly, and a handle assembly connected to the blade assembly.

[0015] According to an embodiment of the present invention, a jaw assembly and an electric stapler have at least the following beneficial effects:

[0016] (1) The suture staples are bent into a spiral shape to improve the hemostasis effect and avoid excessive compression of tissue;

[0017] (2) The suture staples are equipped with pre-formed parts to improve the success rate of suture staple formation;

[0018] (3) The molding part is a combination of biodegradable biomedical polymer materials and anti-inflammatory and antibacterial drugs, which is beneficial to wound healing after surgery.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of an installation structure according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the undeformed molding part according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the deformed molding part according to an embodiment of the present invention.

[0025] Icon labels:

[0026] Anchor bracket 100;

[0027] Staple cartridge support 200;

[0028] Anchor seat 300, anchor groove 310, first arc surface 311, second arc surface 312;

[0029] 400 nail cartridge, 410 nail outlet, 411 nail pusher plate, 412 nail pusher auxiliary forming groove;

[0030] 500 stitching staples, 510 preformed part;

[0031] Molding section 600. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 4As shown, an embodiment of the present invention discloses a jaw assembly and an electric stapler, comprising: an anvil support 100, a staple cartridge support 200, an anvil 300, a staple cartridge 400, and a plurality of staples 500. A drive assembly is internally disposed within the anvil support 100; the staple cartridge support 200 is hinged to the anvil support 100; both the anvil support 100 and the staple cartridge support 200 are prior art and will not be described in detail. The anvil 300 is fixedly connected to the anvil support 100. The anvil 300 is made of metal, and a plurality of anvil grooves 310 are formed on the side of the anvil 300 near the staple cartridge support 200. A cutting groove is also formed in the center of the anvil 300, serving as a guide for a cutting blade. Both the cutting blade and the cutting groove are prior art and will not be described in detail. The cutting blade is also driven by the drive assembly. The drive assembly includes a cutter bar and a pusher block. A cutting blade is connected to the cutter bar, and the pusher block is slidably connected within the staple cartridge 400. The pusher block is used to be pushed by the cutter bar and to push the suture staples 500. The specific structure of the cutter bar and the pusher block is existing technology and will not be described in detail. The drive assembly can drive the staple cartridge bracket 200 to rotate and move closer to the staple anchor 300; the staple cartridge 400 is detachably connected to the staple cartridge bracket 200 and is snapped onto the staple cartridge bracket 200 for easy replacement. The staple cartridge 400 has multiple staple ejection holes 410. When the staple anchor 300 and the staple cartridge 400 are clamped together, the staple ejection holes 410 can be aligned with the corresponding staple anchor grooves 310 so that the suture staples 500 can leave the staple ejection holes 410 and enter the staple anchor grooves 310; multiple suture staples 500 are installed in the corresponding staple ejection holes 410. The suture staples 500 are made of titanium alloy. Titanium alloy has good tissue compatibility and will not cause foreign body reactions on the skin, so there will be no discomfort symptoms such as suture-like redness and swelling. A drive assembly is used to push the suture staple 500 out of the staple exit hole 410 and into the corresponding staple anvil groove 310; multiple shaping parts 600 are installed in the corresponding staple anvil grooves 310, and the shaping parts 600 can bend part of the suture staple 500 entering the staple anvil groove 310 into a spiral shape. In the prior art, the staple staple 500 can only bend into an approximate B-shape after entering the staple anvil groove 310. In this invention, the shaping parts 600 are provided in the staple anvil groove 310 to bend the end of the suture staple 500 into a spiral shape, reducing the compression on the sutured tissue and making the staple staple 500 more reliably fixed in the tissue.

[0037] Reference Figures 1 to 4As shown, the staple 500 is C-shaped, and pre-formed portions 510 are provided at both ends of the staple 500 near the anvil 300. The two pre-formed portions 510 are bent towards each other. The function of the pre-formed portions 510 is to make the staple 500 bend more smoothly and less prone to jamming when it bends in the anvil groove 310. Since the forming portion 600 is made of a deformable material, direct contact between the tip of the staple 500 and the forming portion 600 will puncture the forming portion 600, causing forming failure. Therefore, the pre-formed portions 510 can prevent the tip of the staple 500 from directly contacting the forming portion 600, increasing the contact area between the staple 500 and the forming portion 600, and improving the success rate of staple forming.

[0038] Reference Figures 1 to 2 As shown, it can be understood that a pusher plate 411 is provided in the staple ejection hole 410. The pusher plate 411 can be driven by the drive assembly to move towards the anvil 300 to push the suture staple 500 away from the staple ejection hole 410. An arc-shaped pusher auxiliary forming groove 412 is provided on the side of the pusher plate 411 near the suture staple 500. During the process of the suture staple 500 entering the anvil groove 310 under the pusher auxiliary forming groove 412, the part of the suture staple 500 that abuts against the pusher auxiliary forming groove 412 is bent into an arc shape, which helps the suture staple 500 to form a smooth shape as a whole and avoids the suture staple 500 forming sharp edges. This ensures that the suture staple 500 does not damage other healthy tissues during the process of being expelled from the body.

[0039] Reference Figures 1 to 4 As shown, each suture staple 500 corresponds to two anvil grooves 310. Multiple rows of anvil grooves 310 are arranged along the length of the anvil seat 300, with adjacent rows of anvil grooves 310 staggered. This staggered arrangement of the anvil grooves 310 ensures that the suture staples 500 are misaligned after forming, which is beneficial for tissue clamping and reduces tissue bleeding.

[0040] Reference Figures 1 to 4 As shown, it can be understood that the forming part 600 is at least partially made of a plastically deformable material. During the process of the suture pin 500 entering the anvil groove 310, the forming part 600 gradually deforms, causing the radius of curvature of the suture pin 500 to gradually increase. The forming part 600 changes the radius of curvature of the suture pin 500 through its own deformation. When the forming part 600 first comes into contact with the suture pin 500, it has not yet begun to deform, and the suture pin 500 bends with a smaller radius of curvature. As the suture pin 500 continues to move into the anvil groove 310, the forming part 600 gradually deforms, causing the suture pin 500 to bend with a larger radius of curvature, thus forming a spiral shape in the portion of the suture pin 500 that enters the anvil groove 310.

[0041] Reference Figures 1 to 4As shown, the anvil groove 310 has a rectangular cross-section. A first arc surface 311 is provided within the anvil groove 310, and a second arc surface 312 is provided within the forming part 600. The shape of the forming part 600 away from the second arc surface 312 matches the shape of the inner wall of the anvil groove 310 to facilitate embedding and installation within the anvil groove 310. The radius of curvature of the second arc surface 312 is smaller than the radius of curvature of the first arc surface 311. During the process of the suture pin 500 entering the anvil groove 310, the suture pin 500 first contacts the first arc surface 311 and then contacts the second arc surface 312. The first arc surface 311 can be formed by the structure of the anvil groove 310 itself. The first arc surface 311 is a metal surface so it will not deform. The function of the first arc surface 311 is to bend the suture nail 500 entering the anvil groove 310 with a large radius of curvature. The function of the second arc surface 312 is to further bend the suture nail 500 after it has been bent by the first arc surface 311 to a smaller radius of curvature. When the second arc surface 312 fails to deform, it will no longer bend the suture nail 500, so that the radius of curvature of the suture nail 500 gradually increases and forms a spiral shape.

[0042] Reference Figures 1 to 4 As shown, it is understandable that the molding part 600 is snapped into the anvil groove 310. For ease of installation, the first arc surface 311 can also be formed by the molding part 600. However, the material of the surface of the first arc surface 311 should not deform, which requires the molding part 600 to be manufactured using two different materials, increasing the production cost of the molding part 600. Therefore, the molding part 600 is preferably set in the anvil groove 310 using an interference fit or snap-fit ​​method.

[0043] Reference Figure 2 As shown, it can be understood that the two ends of the same suture staple 500 bend in opposite directions after entering the anvil groove 310. The bending direction of the suture staple 500 is prior art and will not be described in detail here.

[0044] Reference Figures 1 to 4As shown, it can be understood that the molding part 600 is a composite material using a biodegradable biomedical polymer material as a carrier and an anti-inflammatory and antibacterial drug as a sustained-release agent. The biodegradable biomedical polymer material can be one or more materials such as polycaprolactone, polylactic acid, and polyglycolic acid, and the anti-inflammatory and antibacterial drug is a combination of antibiotics and glucocorticoids. Because the molding part 600 needs to be manufactured using a deformable material, during the molding process of the suture staple 500, a portion of the molding part 600 will inevitably leave the anvil groove 310 and enter the sutured tissue. Therefore, the use of a biodegradable biomedical polymer material allows the molding part 600 to automatically degrade within the sutured tissue. During the degradation process of the molding part 600, the anti-inflammatory and antibacterial drug is gradually released into the sutured tissue, which helps reduce inflammation and tissue edema, and promotes rapid wound healing. Compared to oral and injectable drugs, the molding part 600 in this invention results in a higher drug concentration at the wound site during degradation. Under the condition of achieving the same effect, the smaller the drug dosage used, the better to reduce the impact of antibiotics and glucocorticoids on liver and kidney function.

[0045] The present invention also provides an electric stapler, including the aforementioned jaw assembly, a blade assembly connected to the jaw assembly, and a handle assembly connected to the blade assembly. The drive assembly is rod-shaped, and a motor is disposed within the handle assembly to drive the drive assembly to move along its length.

[0046] Working principle: The drive assembly rotates the staple cartridge bracket 200 until the staple cartridge 400 and the anvil seat 300 are clamped. Then, the drive assembly pushes the pusher plate 411, which pushes the suture staple 500 away from the staple outlet 410 and into the anvil groove 310. The first and second inclined surfaces in the anvil groove 310 guide the suture staple 500, causing it to bend. When the second inclined surface of the forming part 600 first contacts the suture staple 500, the forming part 600 has not yet started to deform, and the suture staple 500 bends with a small radius of curvature. As the suture staple 500 continues to move into the anvil groove 310, the forming part 600 gradually deforms, causing the suture staple 500 to bend with a larger radius of curvature, thus forming a spiral shape in the part of the suture staple 500 that enters the anvil groove 310.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A jaw assembly, characterized in that, include: An anvil bracket (100) has a drive assembly installed inside; The staple cartridge bracket (200) is hinged to the staple seat bracket (100). An anvil (300) is fixedly connected to the anvil bracket (100). The anvil (300) has a plurality of anvil slots (310). The driving assembly can drive the staple cartridge bracket (200) and the anvil (300) to move closer to each other. The staple cartridge (400) is detachably connected to the staple cartridge bracket (200). The staple cartridge (400) has multiple staple ejection holes (410) that can be aligned with the corresponding staple grooves (310). Multiple suture staples (500) are installed in corresponding staple holes (410), and the drive assembly is used to push the suture staples (500) out of the staple holes (410) and into the corresponding staple grooves (310). Multiple forming parts (600) are installed in corresponding anvil grooves (310). The forming parts (600) can bend the suture pin (500) entering the anvil groove (310) into a spiral shape. The forming parts (600) are at least partially made of a plastically deformable material. During the process of the suture pin (500) entering the anvil groove (310), the forming parts (600) gradually deform, causing the radius of curvature of the suture pin (500) to gradually increase. When the forming parts (600) first come into contact with the suture pin (500), the forming parts (600) have not yet started to deform. As the suture pin (500) continues to move into the anvil groove (310), the forming parts (600) gradually deform. After the forming parts (600) have deformed, the suture pin (500)... 00) The radius of curvature of the bending is greater than the radius of curvature of the suture pin (500) before the forming part (600) begins to deform. The cross-section of the anvil groove (310) is rectangular. A first arc surface (311) is provided in the anvil groove (310). A second arc surface (312) is provided in the forming part (600). The radius of curvature of the second arc surface (312) is smaller than the radius of curvature of the first arc surface (311). During the process of the suture pin (500) entering the anvil groove (310), the suture pin (500) first contacts the first arc surface (311) and then contacts the second arc surface (312). The material of the first arc surface (311) will not be deformed. The second arc surface (312) gradually deforms during the process of contacting the suture pin (500).

2. The jaw assembly according to claim 1, characterized in that: The suture staple (500) is C-shaped, and the two ends of the suture staple (500) near the anvil (300) are provided with pre-formed parts (510), and the two pre-formed parts (510) are bent in a direction that approaches each other.

3. The jaw assembly according to claim 2, characterized in that: A pusher plate (411) is provided in the nail outlet hole (410). The pusher plate (411) can be driven by the drive assembly to push the suture nail (500) away from the nail outlet hole (410). An arc-shaped pusher auxiliary forming groove (412) is provided on the side of the pusher plate (411) near the suture nail (500).

4. The jaw assembly according to claim 3, characterized in that: Each of the suture staples (500) corresponds to two anvil grooves (310), and the anvil grooves (310) are arranged in multiple rows along the length direction of the anvil seat (300), with each adjacent row of anvil grooves (310) staggered.

5. The jaw assembly according to claim 4, characterized in that: The forming part (600) is engaged in the anvil groove (310).

6. The jaw assembly according to claim 5, characterized in that: The two ends of the same suture staple (500) bend in opposite directions after entering the anvil groove (310).

7. The jaw assembly according to claim 6, characterized in that: The molding part (600) is a composite material with a biodegradable biomedical polymer material as a carrier and an anti-inflammatory and antibacterial drug as a sustained-release agent.

8. An electric stapler, characterized in that, include: The jaw assembly as described in any one of claims 1-7, the blade assembly connected to the jaw assembly, and the handle assembly connected to the blade assembly.

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