Nail pushing piece of anastomat

Abstract

The nail pushing piece is firmly combined with a nail bin of the anastomat through a corresponding clamping groove or a connecting piece, a nail pushing groove is formed in the top end of the nail pushing piece, the nail pushing piece comprises clamping structures, the clamping structures are arranged on the two sides of the upper end of the nail pushing groove, and the clamping structures clamp anastomosis nails. The anastomosis nail is clamped in the clamping structure when not subjected to downward pulling force; when the front end of the nail pushing piece makes contact with tissue and is subjected to closing force, the clamping structure releases the pushed anastomosis nails, and the anastomosis nails which are not anastomosed with the tissue cannot fall off due to clamping of the clamping structure. According to the nail pushing piece of the anastomat, the probability that empty nails fall off can be reduced, the surgical risk of a patient is reduced, meanwhile, the surgical difficulty can be reduced, and the surgical duration can be shortened.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a stapler pusher. Background Technology

[0002] Endoscopic staplers are key instruments commonly used in modern surgery, widely employed for tissue resection, transection, and anastomosis in various procedures including gastrointestinal surgery, hepatobiliary surgery, thoracic surgery, urology, and gynecology. With the advent of motorized endoscopic staplers and disposable staple cartridges, these instruments are increasingly used in abdominal, obstetric, pediatric, and thoracic surgeries, effectively enabling tissue transection and anastomosis.

[0003] Despite the significant advantages and continuous technological innovation of surgical staplers, a key safety issue remains: most existing stapler cartridges are for single use only, and their pusher mechanism is shown in the attached diagram. Figure 1 Appendix Figure 2 As shown, the pusher slot of the pusher plate can effectively push the staples. However, during the anastomosis process, the pusher plate indiscriminately pushes out all the staples to close. Where the jaws hold the tissue, the staples can be effectively closed on the tissue. But where the jaws do not hold the tissue, the staples are ejected and cannot close on the tissue. After the jaws open, the staples that are not closed on the tissue (i.e., "empty staples") will fall into the cavity. Current staplers cannot distinguish between the presence and absence of tissue, nor can they grasp and retrieve empty staples. Although titanium staples themselves have low tissue rejection and good biocompatibility, too many staples floating in the body can pose a risk of foreign body infection and increase health risks for patients. Statistics show that there are approximately 8,000 to 9,000 cases of stapler-related complications in the United States each year, of which about 90% are attributed to abnormal stapler firing. This figure indicates a widespread safety hazard in current stapler technology and operation. Therefore, the need to locate and remove scattered empty staples undoubtedly increases the complexity of the surgical procedure and may cause potential damage to the patient, increasing the risk of surgery. In summary, how to prevent empty staples from falling out of the stapler is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A stapler pusher is provided, wherein the pusher is securely connected to the staple cartridge of the stapler via a corresponding slot or connector. The top of the pusher has a pusher groove, and the pusher includes a clamping structure disposed on both sides of the upper end of the pusher groove. The clamping structure clamps the staples, so that the staples are clamped within the clamping structure when not subjected to downward pulling force. When the front end of the pusher contacts the tissue and is subjected to closing force, the clamping structure releases the pushed staples, and staples that have not been anastomosed to the tissue will not fall off due to the clamping of the clamping structure.

[0005] Furthermore, the clamping structure is a clamping claw, and there are multiple clamping claws, which are respectively disposed on both sides of the upper end of the push pin groove; Furthermore, there are three clamping claws, which are staggered on both sides of the upper end of the pusher slot; Furthermore, there are four clamping claws, symmetrically arranged on both sides of the upper end of the push pin groove; Furthermore, the tip of the gripper is designed with an outward-opening S-shaped opening; Furthermore, the opening width is set to be slightly smaller than the diameter of the staple wire; Furthermore, clearance grooves are provided in the middle of the two pairs of clamping claws to prevent interference between the nail tip and the pusher plate during the closing process of the staples; Furthermore, the material used for the push nail plate is a medical polymer material with high elasticity; Furthermore, the material is polyetheretherketone (PEEK) or polyphenylsulfone (PPSU); Furthermore, the clamping component is coated with a flexible coating or has a small amount of magnetic material applied to the contact surface with the staples to improve the adhesion or friction of the staples.

[0006] The technical solution of this application has the following beneficial effects: 1. Reduce the probability of empty screws falling out, thus reducing the surgical risk for patients; 2. Reduce the difficulty and duration of the surgery; 3. The structure is simple, easy to implement, and has achieved good technical results. Attached Figure Description

[0007] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0008] Figure 1 This is a schematic diagram of the existing technology of pusher clips and staples mating structure; Figure 2 This is a schematic diagram of the existing push-nail plate structure; Figure 3 This is a schematic diagram of the push nail plate structure according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the mating structure of the pusher and the staple in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the pusher and the staple that do not contact the tissue after anastomosis in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the push-nail plate structure in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the mating structure of the pusher pin and the staple in Embodiment 2 of the present invention; Figure 8This is a schematic diagram of the pusher and the staple that do not contact the tissue after anastomosis in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the push-nail plate structure in Embodiment 3 of the present invention; Figure 10 This is a schematic diagram of the mating structure of the pusher pin and the staple in Embodiment 3 of the present invention; Figure 11 This is a schematic diagram of the pusher and the staple that do not contact the tissue after anastomosis in Embodiment 3 of the present invention; Reference numerals: 1 Push pin groove, 2 Clamping claw, 3 Clearance groove. Detailed Implementation

[0009] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0010] See appendix Figure 1-11 This application provides a staple pusher, which is firmly connected to the staple cartridge of the stapler through a corresponding slot or connector. The top of the staple pusher is provided with a staple pusher groove 1. The staple pusher includes a clamping structure, which is disposed on both sides of the upper end of the staple pusher groove 1. The clamping structure clamps the staples so that the staples are clamped in the clamping structure when there is no downward pulling force. When the front end of the staple pusher contacts the tissue and is subjected to a closing force, the clamping structure releases the pushed staples. Staples that have not been anastomosed to the tissue will not fall off due to the clamping of the clamping structure.

[0011] The clamping structure has an opening, the width of which is slightly smaller than the wire diameter of the staple, so that the staple is clamped in the opening when it is not under downward pulling force, and the staple will not be unable to fall out when the opening is squeezed.

[0012] In Embodiment 1, the clamping structure is a clamping claw 2, and there are multiple clamping claws 2, respectively disposed on both sides of the upper end of the pusher groove. Preferably, there are three clamping claws 2, which are staggered and distributed on both sides of the upper end of the pusher groove (see Appendix). Figure 3The clamping claw 2 is divided into three staggered segments, which facilitates mold release and assists in the forming and function of the pusher plate. The top of the clamping claw 2 is designed with an outward-opening S-shaped opening. The inner edge of the opening is chamfered to allow the anastomosis staples to smoothly enter the pusher slot 1. When the front end of the clamping structure is not in contact with the tissue, the S-shaped opening will not open, holding an empty staple; when the front end of the clamping structure contacts the tissue and is subjected to closing thrust, the S-shaped opening is squeezed and opens outward, increasing the opening width, thereby releasing the normally closed anastomosis staple; the clamping structure that is not in contact with the tissue still holds the anastomosis staple, which is removed from the body along with the staple cartridge after surgery.

[0013] Furthermore, the width of the opening at the top of the clamping structure is set to be 0.25mm-0.35mm smaller than the diameter of the staple wire, preferably 0.03mm smaller. This ensures that empty staples will not fall out naturally, and at the same time, since the opening is not completely closed, it will not clamp the tissue when closing the tissue.

[0014] Example 2, see appendix Figure 6 There are four clamping claws 2, symmetrically arranged on both sides of the upper end of the pusher slot. The two pairs of clamping claws 2 can further enhance the stability of the clamping structure, making the clamping of the top of a single staple more secure and reliable.

[0015] Example 3, see appendix Figure 9 The distance between the two pairs of clamping claws 2 is increased, and a clearance groove 3 is provided in the middle of the two pairs of clamping claws to prevent the nail tip from interfering with the pusher plate during the closure of the staple and affecting the closure effect of the staple.

[0016] The pusher plate is made of highly elastic medical polymer materials, such as polyetheretherketone (PEEK) and polyphenylene sulfone (PPSU), to enhance the elastic deformation capacity at the top opening of the clamping structure. The clamping components have a flexible coating (such as medical silicone) or a small amount of magnetic material applied to the contact surface with the staples to improve adhesion or friction, thereby more securely clamping unclosed staples.

[0017] The clamping structure of this application is not limited to the aforementioned form in terms of structure, and can also have a variety of forms. For example, more than four arrayed clamping claws can be formed at the top to enhance the clamping effect, or the opening can be reduced to form a barbed structure to further enhance the clamping effect.

[0018] When used in conjunction with the stapler cartridge of this application, the pusher plate can achieve a secure connection through corresponding slots or connectors, making the installation process convenient and reliable. After installation, the pusher plate and the cartridge are stably connected, preventing loosening during movement within the cartridge and ensuring smooth operation. The pusher plate is installed inside the stapler cartridge, and its installation position can be determined according to the cartridge type. The staples are installed upside down from the bottom of the cartridge. During installation, the staples are inserted upside down into the cartridge holes and secured. All parts cooperate to form a complete cartridge assembly. After installing the pusher plate, the anastomosis process is the same as with a conventional cartridge, requiring no additional operation.

[0019] Because of the clamping structure, empty staples are not easily dislodged when the tip of the pusher is not in contact with the tissue. When the tip of the pusher is squeezed by the tissue, the opening is forced open, allowing the normally closed staples to be released smoothly, avoiding additional pulling on the tissue. Since empty staples are held in the staple cartridge by the pusher after anastomosis and do not fall into the cavity, they can be removed along with the staple cartridge postoperatively, reducing the workload and time required for manual staple removal.

[0020] Applying the pusher structure of this invention can significantly reduce the probability of empty screws falling out. Experiments have shown that using the structure of this invention can reduce the rate of empty screw scattering during the anastomosis process by more than 90%, thereby saving surgical time and reducing surgical risks.

[0021] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the invention disclosed in the specification and embodiments. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0022] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A stapler pusher plate, wherein the pusher plate is securely engaged with the stapler cartridge via a corresponding slot or connector, and the top of the pusher plate is provided with a pusher groove, characterized in that: The pusher includes a clamping structure disposed on both sides of the upper end of the pusher groove. The clamping structure clamps the anastomosis staples so that the staples are held within the clamping structure when not subjected to downward pulling force. When the front end of the pusher contacts the tissue and is subjected to closing force, the clamping structure releases the pushed anastomosis staples. Staples that have not been anastomosed to the tissue will not fall off due to the clamping of the clamping structure.

2. The stapler pusher as described in claim 1, characterized in that, The clamping structure is a clamping claw, and there are multiple clamping claws, which are respectively arranged on both sides of the upper end of the push pin groove.

3. The stapler pusher as described in claim 2, characterized in that, There are three clamping claws, which are staggered on both sides of the upper end of the pusher groove.

4. The stapler pusher as described in claim 2, characterized in that, There are four clamping claws, symmetrically arranged on both sides of the upper end of the push pin groove.

5. The stapler pusher as described in claim 3 or 4, characterized in that, The gripper's tip is designed with an outward-opening S-shaped opening.

6. The stapler pusher as described in claim 5, characterized in that, The opening width is set to be slightly smaller than the diameter of the staple wire.

7. The stapler pusher as described in claim 4, characterized in that, The two pairs of clamping claws are provided with clearance grooves in the middle to prevent the nail tip from interfering with the pusher plate during the closing process of the staple.

8. The stapler pusher as described in claim 1, characterized in that, The push nail plate is made of a highly elastic medical polymer material.

9. The stapler pusher as described in claim 8, characterized in that, The material is polyetheretherketone (PEEK) or polyphenylsulfone (PPSU).

10. The stapler pusher as described in claim 1, characterized in that, The clamping components are coated with a flexible coating or have a small amount of magnetic material applied to the contact surface with the staples to improve the adhesion or friction of the staples.

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