Jaw assembly and electric anastomat

Abstract

The utility model discloses a jaw assembly and an electric anastomat, and relates to the technical field of anastomats, the jaw assembly comprises a nail abutting seat support, a nail bin support, a nail abutting seat, a nail bin, a plurality of suturing nails and a plurality of forming parts. A driving assembly is arranged in the nail abutting base support in a penetrating mode. The nail bin support is hinged to the nail abutting base support. The nail abutting seat is fixedly connected to the nail abutting seat support, a plurality of nail abutting grooves are formed in the nail abutting seat, and the driving assembly can drive the nail bin support and the nail abutting 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, and the nail outlet holes can be aligned to the corresponding nail abutting grooves; suturing nails are installed in the corresponding nail outlet holes, and the driving assembly is used for pushing the suturing nails to leave the nail outlet holes and enter the corresponding nail abutting grooves; the forming parts are installed in the corresponding nail abutting grooves, and the forming parts can enable the suturing nails entering the nail abutting grooves to be bent into a spiral shape. The hemostat can avoid excessive squeezing of tissues and improve the hemostasis effect.

Description

Technical Field

[0001] The utility model relates to the technical field of staplers, and particularly relates to a jaw assembly and an electric stapler. Background Art

[0002] As a handheld surgical instrument for tissue cutting and suturing, the main working principle of a stapler is to use titanium staples to sever and anastomose / connect / suture tissues, which can reduce or eliminate bleeding from soft tissues during the process of cutting tissues. The stapler includes a handle assembly, a transmission assembly, and an end effector. Among them, the end effector includes a cartridge assembly and an anvil. The cartridge assembly includes a slider, a pusher, and a cutter. A chute through which the cutter can pass is provided on the cartridge of the cartridge assembly. The handle assembly is provided with a trigger, a button, or a push button for controlling the cutter. During operation, the tissue is placed between the cartridge assembly and the anvil. By pulling the firing trigger, the anvil of the end effector pivots towards the cartridge assembly side to clamp the tissue. After the tissue is clamped, the push button is triggered to control the cutter to move along the chute of the anvil to cut the tissue; the cutter and the slider translate synchronously, and the slider pushes the pusher to rise from the cartridge, and the pusher pushes the titanium staple into the tissue to achieve tissue suture. However, the anvil groove structure in the prior art is single. After the existing suture staple enters the anvil groove, it can only be bent into an approximate B-shaped shape, and the hemostatic effect is not good. It is also easy to cause excessive squeezing of tissues, resulting in a long postoperative recovery time for the wound. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a jaw assembly and an electric stapler, which can avoid excessive squeezing of tissues and improve the hemostatic effect.

[0004] A jaw assembly according to an embodiment of the first aspect of the utility model includes: an anvil bracket, a cartridge bracket, an anvil, a cartridge, a plurality of suture staples, and a plurality of forming parts. A driving component is disposed inside the anvil bracket; the cartridge bracket is hinged to the anvil bracket; the anvil is fixedly connected to the anvil bracket, and a plurality of anvil grooves are formed in the anvil. The driving component can drive the cartridge bracket and the anvil to approach each other; the cartridge is detachably connected to the cartridge bracket, and a plurality of staple holes are formed in the cartridge. The staple holes can be aligned with the corresponding anvil grooves; the suture staples are installed in the corresponding staple holes, and the driving component is used to push the suture staples out of the staple holes and into the corresponding anvil grooves; the forming parts are installed in the corresponding anvil grooves, and the forming parts can bend the suture staples entering the anvil grooves into a spiral shape.

[0005] A jaw assembly according to an embodiment of the present utility model has at least the following beneficial effects: The staple groove matches the staple exit hole, enabling the driving assembly to push the suture staple out of the staple exit hole and into the corresponding staple groove; A plurality of forming parts are installed in the corresponding staple grooves, and the forming parts can bend a part of the suture staples entering the staple grooves into a spiral shape. In the present utility model, forming parts are arranged in the staple grooves, so that the ends of the suture staples are bent into a spiral shape, reducing the squeezing of the sutured tissue and making the suture staples more reliably fixed in the tissue.

[0006] According to some embodiments of the present utility model, the suture staple is C-shaped, and pre-forming parts are arranged at two ends of the suture staple close to the anvil, and the two pre-forming parts are bent in a direction approaching each other.

[0007] According to some embodiments of the present utility model, a pusher plate is arranged in the staple exit hole, and the pusher plate can be driven by the driving assembly to push the suture staple out of the staple exit hole, and an arc-shaped pusher auxiliary forming groove is arranged on one side of the pusher plate close to the suture staple.

[0008] According to some embodiments of the present utility model, each suture staple corresponds to two staple grooves, and the staple grooves are arranged in multiple columns along the length direction of the anvil, and adjacent columns of the staple grooves are staggered.

[0009] According to some embodiments of the present utility model, at least part of the forming part is made of a plastically deformable material, and during the process of the suture staple entering the staple groove, the forming part gradually deforms, so that the curvature radius of the bent suture staple gradually increases.

[0010] According to some embodiments of the present utility model, the cross-section of the staple groove is rectangular, a first arc surface is arranged in the staple groove, a second arc surface is arranged on the forming part, the curvature radius of the second arc surface is smaller than the curvature radius of the first arc surface, and during the process of the suture staple entering the staple 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 utility model, the forming part is clamped in the staple groove.

[0012] According to some embodiments of the present utility model, the bending directions of the two ends of the same suture staple are opposite after entering the staple groove.

[0013] According to some embodiments of the present utility model, the forming part adopts 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 utility model further provide an electric stapler, including: the above-mentioned jaw assembly, a knife bar assembly connected to the jaw assembly, and a handle assembly connected to the knife bar assembly.

[0015] A jaw assembly and an electric stapler according to an embodiment of the present utility model have at least the following beneficial effects:

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

[0017] (2) The staples are provided with a preformed portion to improve the success rate of staple forming;

[0018] (3) The forming portion is a combination of a biodegradable biomedical polymer material and an anti-inflammatory and antibacterial drug, which is beneficial to the postoperative healing of the wound.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following will further illustrate the present utility model in conjunction with the drawings and embodiments, where:

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

[0022] Figure 2 is a schematic cross-sectional view according to an embodiment of the present utility model;

[0023] Figure 3 is a schematic diagram of the forming portion not deformed according to an embodiment of the present utility model;

[0024] Figure 4 is a schematic diagram of the forming portion deformed according to an embodiment of the present utility model.

[0025] Reference numerals in the drawings:

[0026] Anvil holder bracket 100;

[0027] Cartridge holder bracket 200;

[0028] Anvil 300, anvil groove 310, first arc surface 311, second arc surface 312;

[0029] Cartridge 400, staple exit hole 410, pusher plate 411, pusher-assisted forming groove 412;

[0030] Staple 500, preformed portion 510;

[0031] Forming portion 600. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with 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 utility model and should not be construed as a limitation of the present utility model.

[0033] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the upper and lower directions, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0034] In the description of the present utility model, "a plurality" means more than two. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0035] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense. Those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0036] Refer to Figures 1 to 4As shown in the figure, a jaw assembly and an electric stapler according to an embodiment of the present utility model include: an anvil holder 100, a cartridge holder 200, an anvil 300, a cartridge 400, and a plurality of suture staples 500. A driving assembly is disposed inside the anvil holder 100; the cartridge holder 200 is hinged to the anvil holder 100; the anvil holder 100 and the cartridge holder 200 are both prior arts, so they will not be described in detail. The anvil 300 is fixedly connected to the anvil holder 100. The anvil 300 is made of metal. A plurality of anvil grooves 310 are formed on one side of the anvil 300 close to the cartridge holder 200. A knife groove is also formed at the center of the anvil 300 for guiding a cutting knife. The cutting knife and the knife groove are both prior arts, so they will not be described in detail. The cutting knife is also driven by the driving assembly. The driving assembly includes a knife rod and a pusher block. A cutting knife is connected to the knife rod. The pusher block is slidably connected inside the cartridge 400. The pusher block is used to be pushed by the knife rod and to push the suture staples 500. The specific structures of the knife rod and the pusher block are prior arts, so they will not be described in detail. The driving assembly can drive the cartridge holder 200 to rotate and approach the anvil 300; the cartridge 400 is detachably connected to the cartridge holder 200. The cartridge 400 is snap-connected to the cartridge holder 200 for easy replacement. A plurality of staple holes 410 are formed on the cartridge 400. When the anvil 300 and the cartridge 400 are clamped together, the staple holes 410 can be aligned with the corresponding anvil grooves 310 so that the suture staples 500 can enter the anvil grooves 310 after leaving the staple holes 410; a plurality of suture staples 500 are installed in the corresponding staple holes 410. The suture staples 500 are made of titanium alloy. Titanium alloy has good tissue compatibility and will not cause skin foreign body reactions. Therefore, discomfort symptoms such as suture-like swelling will not occur. The driving assembly is used to push the suture staples 500 out of the staple holes 410 and into the corresponding anvil grooves 310; a plurality of forming parts 600 are installed in the corresponding anvil grooves 310. The forming parts 600 can bend some of the suture staples 500 entering the anvil grooves 310 into a spiral shape. In the prior art anvil grooves 310, the existing suture staples 500 can only be bent into an approximately B-shaped shape after entering the anvil grooves 310. In the present utility model, the forming parts 600 are arranged in the anvil grooves 310 to bend the ends of the suture staples 500 into a spiral shape, reducing the compression on the sutured tissue and making the suture staples 500 more reliably fixed in the tissue.

[0037] Referring to Figures 1 to 4As shown, it can be understood that the staple 500 is C-shaped, and preformed portions 510 are provided at two ends of the staple 500 close to the anvil 300, and the two preformed portions 510 are bent in a direction approaching each other. The function of the preformed portion 510 is to make the staple 500 bend more smoothly in the anvil groove 310 and not get stuck easily. Since the forming portion 600 is made of a deformable material, if the tip of the staple 500 directly contacts the forming portion 600, it will pierce the forming portion 600 and cause forming failure. Therefore, the preformed portion 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 500 forming.

[0038] Referring to Figures 1 to 2 As shown, it can be understood that a pusher plate 411 is provided in the staple exit hole 410. The pusher plate 411 can be driven by a driving assembly to move in a direction close to the anvil 300 to push the staple 500 out of the staple exit hole 410. An arc-shaped staple pushing and assisting forming groove 412 is provided on one side of the pusher plate 411 close to the staple 500. During the process of the staple 500 entering the anvil groove 310 under the push of the staple pushing and assisting forming groove 412, the part of the staple 500 in contact with the staple pushing and assisting forming groove 412 is bent into an arc shape, which is beneficial for the staple 500 to form a smooth shape as a whole and avoid the staple 500 from forming sharp edges and corners, so that the staple 500 will not damage other healthy tissues during the process of being discharged from the body.

[0039] Referring to Figures 1 to 4 As shown, it can be understood that each staple 500 corresponds to two anvil grooves 310. Multiple columns of anvil grooves 310 are arranged along the length direction of the anvil 300, and adjacent columns of anvil grooves 310 are arranged staggeredly. The staggered arrangement of the anvil grooves 310 makes the staples 500 arranged out of position after forming, which is beneficial for tissue clamping and reduces tissue bleeding.

[0040] Referring to Figures 1 to 4 As shown, it can be understood that at least part of the forming portion 600 is made of a plastically deformable material. During the process of the staple 500 entering the anvil groove 310, the forming portion 600 gradually deforms, and the curvature radius of the staple 500 bending gradually increases. The forming portion 600 changes the curvature radius of the staple 500 bending through its own deformation. When the forming portion 600 just starts to contact the staple 500, the forming portion 600 has not started to deform yet, and the staple 500 bends with a smaller curvature radius. When the staple 500 continues to move into the anvil groove 310, the forming portion 600 gradually deforms, making the staple 500 bend with a larger curvature radius, so that the part of the staple 500 entering the anvil groove 310 forms a spiral shape.

[0041] Referring to Figures 1 to 4As shown, it can be understood that the cross-section of the staple groove 310 is rectangular. A first arc surface 311 is provided in the staple groove 310, and a second arc surface 312 is provided on 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 staple groove 310 for easy embedding and installation in the staple groove 310. The radius of curvature of the second arc surface 312 is smaller than that of the first arc surface 311. During the process of the staple 500 entering the staple groove 310, the staple 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 staple groove 310 itself. Since the surface of the first arc surface 311 is made of metal material, no deformation will occur. The function of the first arc surface 311 is to bend the staple 500 entering the staple groove 310 with a relatively large radius of curvature first. The function of the second arc surface 312 is to further bend the staple 500 bent by the first arc surface 311 into a smaller radius of curvature. When the second arc surface 312 fails to deform, the second arc surface 312 no longer bends the staple 500, so that the radius of curvature of the bent staple 500 gradually increases to form a spiral shape.

[0042] Referring to Figures 1 to 4 As shown, it can be understood that the forming part 600 is snap-fitted into the staple groove 310. For easy installation, the first arc surface 311 can also be formed by the forming part 600. However, the material on the surface of the first arc surface 311 should not deform, which requires the forming part 600 to be made of two different materials, increasing the production cost of the forming part 600. Therefore, the forming part 600 is preferably arranged in the staple groove 310 by interference fit or snap connection.

[0043] Referring to Figure 2 As shown, it can be understood that the bending directions of both ends of the same staple 500 are opposite after entering the staple groove 310. The bending direction of the staple 500 is a prior art, so it will not be described in detail.

[0044] Referring to Figures 1 to 4As shown, it can be understood that the forming part 600 adopts a composite material with a biodegradable biomedical polymer material as the carrier and an anti-inflammatory and antibacterial drug as the sustained-release agent. The biodegradable biomedical polymer material can be selected from one or more of materials such as polycaprolactone, polylactic acid-polyglycolic acid, etc., and the anti-inflammatory and antibacterial drug is selected as a combination of an antibiotic and a glucocorticoid. Since the forming part 600 needs to be made of deformable materials, inevitably, a part of the forming part 600 will enter the tissue to be sutured with the suture staple 500 when the suture staple 500 is formed and leave the anvil groove 310. Therefore, using the biodegradable biomedical polymer material enables the forming part 600 to automatically degrade in the tissue to be sutured. During the degradation process of the forming part 600, the anti-inflammatory and antibacterial drugs are gradually released into the tissue to be sutured, which is beneficial to reducing inflammation and tissue edema and conducive to the rapid healing of the wound. Compared with oral and injected drugs, when the forming part 600 in the present utility model degrades, the drug concentration at the wound is higher. Under the condition of achieving the same effect, the smaller the drug dose used, which is beneficial to reducing the impact of antibiotics and glucocorticoids on liver and kidney functions.

[0045] The present utility model also provides an electric stapler, which includes the above-mentioned jaw assembly, a knife bar assembly connected to the jaw assembly, and a handle assembly connected to the knife bar assembly. The driving assembly is rod-shaped, and a motor is arranged in the handle assembly to drive the driving assembly to move along its length direction.

[0046] Working principle: The driving assembly drives the cartridge holder 200 to rotate until the cartridge 400 and the anvil 300 are clamped. Then the driving assembly pushes the pusher plate 411, and the pusher plate 411 pushes the suture staple 500 to leave the staple exit hole 410 and enter the anvil groove 310. The first inclined surface and the second inclined surface in the anvil groove 310 respectively guide the suture staple 500, causing the suture staple 500 to bend. When the second inclined surface of the forming part 600 just starts to contact the suture staple 500, the forming part 600 has not started to deform yet, and the suture staple 500 bends with a smaller radius of curvature. When 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, so that the part of the suture staple 500 entering the anvil groove 310 forms a spiral shape.

[0047] The above has described the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which it pertains, various changes can be made without departing from the gist of the present utility model.

Claims

1. A jaw assembly, characterized in that: include: An anvil support (100) having a driving assembly therein; A nail magazine support (200) is hinged to the nail anvil support (100); An anvil (300) is fixedly connected to the anvil support (100), a plurality of anvil grooves (310) are provided on the anvil (300), and the driving assembly can drive the nail magazine support (200) and the anvil (300) to approach each other; A nail magazine (400) is detachably connected to the nail magazine bracket (200), and a plurality of nail holes (410) are formed on the nail magazine (400), and the nail holes (410) can be aligned with the corresponding nail receiving grooves (310); A plurality of suture staples (500) are installed in the corresponding staple holes (410), and the driving assembly is used to push the suture staples (500) out of the staple holes (410) and into the corresponding staple anvil grooves (310); A plurality of forming parts (600) are installed in the corresponding anvil grooves (310), and the forming parts (600) can make the suture nail (500) entering the anvil groove (310) bend into a spiral shape.

2. The jaw assembly according to claim 1, characterized in that: The suture nail (500) is C-shaped, and preformed portions (510) are provided at two ends of the suture nail (500) close to the anvil (300), and the two preformed portions (510) are bent in a direction approaching each other.

3. The jaw assembly according to claim 2, characterized in that: A nail pushing plate (411) is arranged in the nail outlet hole (410), and the nail pushing plate (411) can be driven by a driving assembly to push the suture nail (500) out of the nail outlet hole (410), and an arc-shaped nail pushing auxiliary forming groove (412) is arranged on a side of the nail pushing plate (411) close to the suture nail (500).

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

5. The jaw assembly according to claim 4, characterized in that: The forming portion (600) is at least partially made of a plastically deformable material, and when the suture staple (500) enters the staple annulus groove (310), the forming portion (600) gradually deforms so that the curvature radius of the suture staple (500) gradually increases.

6. The jaw assembly according to claim 5, characterized in that: The cross section of the staple groove (310) is rectangular, a first curved surface (311) is provided in the staple groove (310), the forming portion (600) is provided with a second curved surface (312), the curvature radius of the second curved surface (312) is smaller than the curvature radius of the first curved surface (311), and when the suture staple (500) enters the staple groove (310), the suture staple (500) first contacts the first curved surface (311) and then contacts the second curved surface (312).

7. The jaw assembly according to claim 6, characterized in that: The forming portion (600) is snap-fitted into the pin retaining groove (310).

8. The jaw assembly according to claim 7, characterized in that: The two ends of the same suture staple (500) have opposite bending directions after entering the staple anvil groove (310).

9. The jaw assembly according to claim 8, characterized in that: The molding part (600) is made of a composite material with a degradable biomedical polymer material as a carrier and an anti-inflammatory and antibacterial drug as a sustained-release agent.

10. An electric stapler, characterized in that: include: A jaw assembly as described in any one of claims 1 to 9, a knife bar assembly connected to the jaw assembly, and a handle assembly connected to the knife bar assembly.

Images