Nail anvil assembly for anastomat

Abstract

The utility model discloses a nail anvil assembly for an anastomat, and relates to the technical field of medical instruments, the nail anvil assembly comprises a nail anvil plate B, the bottom of the nail anvil plate B is sleeved with a nail anvil pressing plate, the two ends of the top of the nail anvil pressing plate are symmetrically and fixedly provided with limiting columns movably penetrating through the nail anvil plate B, and the multiple limiting columns movably penetrate through a lower pressing plate; and the peripheral surfaces of the multiple limiting columns are sleeved with compression springs with the two ends abutting against the lower pressing plate and the limiting ring correspondingly, a set of limiting plates are symmetrically and fixedly arranged at the top of the nail cutting board B, and adjusting plates with the bottom faces of one ends abutting against the top face of the lower pressing plate are inserted into the limiting plates. The clamping force is adjusted according to the thickness of the tissue, needing to be sutured, of the human body, so that the maximum pressure value of the nail anvil pressing plate is preset, appropriate clamping force can be formed, and damage to the tissue of the human body in the clamping process is avoided.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a stapler anvil assembly. Background Technology

[0002] With the development of medical device technology, people have begun to explore instruments that can quickly and efficiently suture tissues. After years of improvement, there are more and more types of staplers, their functions are becoming more and more complete, and their application range is constantly expanding. In reality, doctors use surgical forceps in conjunction with the stapler. The surgical forceps clamp one end of the patient's area to be sutured and straighten it. Then, the two sides of the tissue to be sutured are placed between the stapler's cartridge and anvil, respectively, to ensure that the tissue completely covers the anastomosis area of ​​the cartridge and anvil without twisting or folding.

[0003] The existing Chinese patent publication number CN219538390U discloses a stapler, but this patent has the following shortcomings in actual use:

[0004] This patent proposes a flattening component for the stapler to smooth the surface of human tissue during clamping. However, in actual use, the flattening component can cause tissue misalignment during the flattening process. Furthermore, the clamping force between the staple cartridge and the anvil is fixed and cannot be adjusted according to the thickness of the tissue to be sutured. To improve the adaptability of the stapler and avoid damage to human tissue during clamping, this solution proposes a stapler anvil component. Utility Model Content

[0005] To address the issue of poor compatibility of staplers and the potential for damage to human tissue during clamping, this application provides a stapler anvil assembly.

[0006] The anvil assembly for a stapler provided in this application adopts the following technical solution:

[0007] An anvil assembly for a stapler includes a staple cartridge assembly. An anvil assembly is disposed at the end of the staple cartridge assembly. The anvil assembly includes an anvil plate B. An anvil pressure plate is fitted onto the bottom of the anvil plate B. Two limiting posts are symmetrically fixed at the top ends of the anvil pressure plate, movably passing through the anvil plate B. Limiting rings are welded to the outer peripheral surfaces of multiple limiting posts. A lower pressure plate movably passes through the multiple limiting posts. Compression springs are fitted onto the outer peripheral surfaces of the multiple limiting posts, with their two ends respectively abutting against the lower pressure plate and the limiting rings. A set of limiting plates is symmetrically fixed at the top of the anvil plate B. Limiting holes are formed inside the two limiting plates. An adjusting plate A, with one end abutting against the top surface of the lower pressure plate, is inserted into the limiting holes. An adjusting plate B with a beveled end is welded to the top of the adjusting plate A. An adjusting plate C with a beveled end is welded to the top of the adjusting plate B.

[0008] By adopting the above technical solution, the distance between the lower pressure plate and the nail anvil plate B can be changed by adjusting plate A, adjusting plate B, and adjusting plate C, thereby squeezing and compressing the spring, which can change the downward pressure of the nail anvil plate and thus achieve the effect of pressure regulation.

[0009] Preferably, the bottom of the nailing board B is provided with a rectangular groove A, and the diameter of the nailing board is the same as the inner diameter of the rectangular groove A.

[0010] By adopting the above technical solution, the opening of rectangular groove A can provide sufficient space for adjusting the pressure of the nail anvil plate.

[0011] Preferably, the bottom of the anvil plate is provided with equidistant extrusion grooves for bending the stitches, and the anvil plate is made of stainless steel.

[0012] By adopting the above technical solution, the extrusion groove is used to cause the suture staple to deform during the extrusion process.

[0013] Preferably, the top of the nail cutting board B is symmetrically provided with rectangular grooves B for the bottom to abut against the bottom of the limiting ring, and the diameter of the rectangular grooves B is the same as the diameter of the lower pressure plate.

[0014] By adopting the above technical solution, the opening of the rectangular groove B can provide sufficient compression space for the compression spring.

[0015] Preferably, a limit block is provided at one end of the adjusting plate A.

[0016] By adopting the above technical solution, the addition of the limit block can play a limiting role and prevent the adjusting plate A from separating from the lower pressure plate.

[0017] Preferably, the thickness of adjusting plate A, adjusting plate B, and adjusting plate C are the same, and the ends of adjusting plate A, adjusting plate B, and adjusting plate C away from the limiting plate are on the same plane.

[0018] By adopting the above technical solution, the thickness of adjustment plate A, adjustment plate B, and adjustment plate C are the same, thus forming a three-level adjustment function.

[0019] Preferably, the ends of adjusting plates A, B, and C away from the limiting plate are fixed with a pushing block whose bottom end is slidably connected to the top of the nail anvil plate B. The outer side of the rectangular groove B is arc-shaped. The top two sides of the nail anvil plate B are fixed above the rectangular groove B with sleeves that are inserted into adjusting plates A, B, and C.

[0020] By adopting the above technical solution, the installation of the push block can facilitate the adjustment of the positions of adjustment plate A, adjustment plate B, and adjustment plate C, and the installation of the cover can play a protective role, preventing the sharp edges of various internal components from scratching human tissue.

[0021] Preferably, the nail anvil plate is symmetrically fixed with side plates on both sides, and the nail cartridge assembly is symmetrically fixed with inclined plates on both sides for abutting the side plates.

[0022] By adopting the above technical solution, the installation of the side plate and the inclined plate can play an auxiliary clamping role.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Adjusting the downward pressure distance of the lower pressure plate by adjusting plates A, B, and C changes the compression degree of the compression spring. This allows for adjustment of the clamping force according to the thickness of the tissue to be sutured, thus presetting the maximum pressure value of the anvil pressure plate to form a suitable clamping force and avoid damage to human tissue during clamping.

[0025] 2. The lower slope of the side plates on both sides of the anvil plate will abut against the slope of the side plates on both sides of the staple cartridge assembly, thereby forming a larger clamping area and thus forming a more stable clamping force. At the same time, the outer surfaces of the side plates and the slope plates are all curved, which can avoid damage to the tissue by the sharp edges during clamping. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the application documents;

[0027] Figure 2 This is a schematic diagram of the unfolded structure of the application document;

[0028] Figure 3 This is a partial sectional view of the structure of this application document;

[0029] Figure 4 This is a partial structural diagram of the document in this application;

[0030] Figure 5 This is a side view of the structure of this application document.

[0031] Reference numerals: 1. Staple cartridge assembly; 101. Inclined plate;

[0032] 2. Nail anvil assembly; 200. Nail anvil board; 201. Rectangular groove A; 202. Rectangular groove B; 203. Nail anvil pressure plate; 2030. Extrusion groove; 2031. Side plate; 204. Limiting post; 205. Limiting ring; 206. Lower pressure plate; 207. Compression spring; 208. Limiting plate; 2080. Limiting hole; 209. Adjusting plate A; 2090. Limiting block; 210. Adjusting plate B; 211. Adjusting plate C; 212. Pushing block; 213. Cover. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-5This application will be described in further detail.

[0034] The device's "up, down, left, right" perspectives are... Figure 1 The orientation of the attached diagram is the reference.

[0035] This application discloses a stapler anvil assembly.

[0036] Reference Figures 1-3 A stapler anvil assembly includes a staple cartridge assembly 1 and a stapler anvil assembly 2 at one end of the staple cartridge assembly 1. The stapler anvil assembly 2 includes a stapler plate B200. A rectangular groove A201 is formed at the bottom of the stapler plate B200. A stapler pressure plate 203 with the same inner diameter as the rectangular groove A201 is engaged inside the rectangular groove A201. The stapler pressure plate 203 is sleeved inside the rectangular groove A201, with both ends abutting against the stapler plate B200. Rectangular grooves are symmetrically formed at both ends of the top of the stapler pressure plate 203, and circular holes are symmetrically formed at the bottom of the rectangular grooves. A limit post 204 moves through the rectangular groove. The top of the nail cutting board B200 is symmetrically provided with rectangular grooves B202. The outer peripheral surfaces of multiple limiting posts 204 are welded with limiting rings 205 that abut against the bottom circular holes of the rectangular grooves B202. The diameter of the limiting rings 205 is larger than the diameter of the circular holes. The multiple limiting posts 204 are movably passed through a lower pressure plate 206 with the same diameter as the rectangular grooves B202. The outer peripheral surfaces of the multiple limiting posts 204 are fitted with compression springs 207. One end of the compression spring 207 abuts against the lower surface of the lower pressure plate 206, and the other end of the compression spring 207 away from the lower pressure plate 206 abuts against the upper surface of the limiting rings 205.

[0037] First, the human tissue to be sutured is placed between the anvil assembly 2 and the staple cartridge assembly 1. Then, the stapler is activated, which causes the staples in the staple cartridge assembly 1 to be ejected, penetrate the tissue, and bend under the action of the anvil pressure plate 203 at the bottom of the anvil assembly 2, suturing the tissue together. During this process, the compression degree of the compression spring 207 can be changed by changing the distance between the lower pressure plate 206 and the anvil plate B200, thereby adjusting the maximum pressure value of the anvil pressure plate 203. This can buffer the high-speed impact of the staples and adjust the clamping force to avoid damage to the human tissue during clamping.

[0038] Reference Figures 3-5The top of the nail cutting board B200 is symmetrically and fixedly connected with a limiting plate 208 that is fixedly connected to the top of the cover (213). A limiting hole 2080 is opened on the side surface of the limiting plate 208. The limiting plate 208 is located on one side of the rectangular groove B202. An adjusting plate A209 is inserted into the limiting hole 2080. The bottom surface of one end of the adjusting plate A209 is slidably fitted on the top surface of the lower pressure plate 206. An adjusting plate B210 is welded to the top of the adjusting plate A209. The adjusting plate B210 is close to the lower pressure plate 206. One end is inclined, and an adjusting plate C211 is welded to the top of the adjusting plate B210. The end of the adjusting plate C211 near the lower pressure plate 206 is inclined. The sides of the adjusting plate A209, adjusting plate B210, and adjusting plate C211 are on the same plane. A set of covers 213 are symmetrically fixedly connected to the top two sides of the nail anvil plate B200 above the rectangular groove B202. The covers 213 are slidably connected to the side surfaces of the adjusting plate A209, adjusting plate B210, and adjusting plate C211.

[0039] Because the ends of adjusting plate B210 and adjusting plate C211 are inclined at a 30-degree angle, they can be horizontally pushed to adjust the positions of adjusting plate A209, adjusting plate B210, and adjusting plate C211. This allows one of the tops of adjusting plate A209, adjusting plate B210, and adjusting plate C211 to abut against the top surface of the limiting hole 2080. Since the thickness difference between adjusting plate A209, adjusting plate B210, and adjusting plate C211 is the same, the downward movement distance of the pressure plate 206 can be adjusted at equal intervals, thereby changing the compression degree of the compression spring 207 and achieving the adjustment function. The cover 213 can play a protective role, preventing the sharp edges of various internal components from scratching human tissue.

[0040] Reference Figures 2-5The bottom of the anvil pressure plate 203 is provided with equidistant compression grooves 2030. Each compression groove 2030 consists of two joined circular grooves, which can bend the suture needle during compression. The anvil pressure plate 203 is made of stainless steel (it should be noted that stainless steel has good strength and corrosion resistance, can withstand various stresses during surgery, and will not easily rust or cause allergic reactions in the human body environment). A limiting block 2090 is fixedly connected to one end of the adjusting plate A209 near the lower pressure plate 206 to restrict the movement of the adjusting plate A209. The surfaces of adjustment plates B210 and C211 away from the limiting plate 208 are all on the same plane and have the same thickness. An outer arc-shaped pushing block 212 is fixedly connected to the ends of adjustment plates A209, B210, and C211 away from the limiting plate 208. The bottom end of the pushing block 212 is slidably connected to the top of the nail anvil plate B200. Side plates 2031 with downward inclined surfaces are symmetrically fixedly connected to both sides of the nail anvil plate 203. Inclined plates 101 with upward inclined surfaces are symmetrically fixed to both sides of the nail cartridge assembly 1. The side plates 2031 abut against the inclined plates 101.

[0041] After the anvil assembly 2 and the staple cartridge assembly 1 clamp the human tissue, the lower inclined surfaces of the side plates 2031 on both sides of the anvil pressure plate 203 abut against the upper inclined surfaces of the inclined plates 101 on both sides of the staple cartridge assembly 1, thereby forming a larger clamping area. The suture staples in the staple cartridge assembly 1 are squeezed and bent under the action of the compression groove 2030, thereby completing the suturing. By pushing the two push blocks 212 located on the top of the anvil plate B200, the adjusting plates A209, B210 and C211 are driven to move horizontally, thereby changing the distance between the lower pressure plate 206 and the anvil plate B200, thereby changing the degree of compression of the compression spring 207.

[0042] The implementation principle of the anvil assembly for a stapler in this embodiment is as follows: First, the human tissue to be sutured is placed between the anvil assembly 2 and the staple cartridge assembly 1. Then, the stapler is activated, which causes the staples in the staple cartridge assembly 1 to be ejected, penetrate the tissue, and bend under the action of the anvil pressure plate 203 at the bottom of the anvil assembly 2, suturing the tissue together. During this process, by pushing the push block 212, the adjusting plates A209, B210, and C211 are moved horizontally, thereby adjusting the downward movement distance of the lower pressure plate 206. By changing the compression degree of the compression spring 207, the maximum pressure value of the anvil plate 203 can be adjusted, thereby forming a suitable clamping force and avoiding damage to human tissue during clamping. After the anvil assembly 2 and the staple cartridge assembly 1 clamp the human tissue, the lower inclined surfaces of the side plates 2031 on both sides of the anvil plate 203 will abut against the upper inclined surfaces of the inclined plates 101 on both sides of the staple cartridge assembly 1, thereby forming a larger clamping area. The suture staples in the staple cartridge assembly 1 are squeezed and bent under the action of the compression groove 2030, thereby completing the suturing.

[0043] (It should be noted that the activation of the staples in the staple cartridge assembly 1 by the stapler is instantaneous. After the staples are activated, they pass through the human tissue and impact the compression groove 2030 at the bottom of the anvil plate 203 at high speed, thereby causing inward deformation. Due to the high-speed impact of the staples, the anvil plate 203 is slightly lifted, but it quickly recovers under the action of the compression spring 207. At this time, the deformation coefficient of the four compression springs 207 is greater than the compression force required for the staples to compress and deform, thus completing the suturing.)

[0044] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A staple anvil assembly for a stapler, characterized by: The application relates to a staple cartridge assembly (1), the end of the staple cartridge assembly (1) is provided with a staple anvil assembly (2), the staple anvil assembly (2) comprises a staple anvil plate B (200), the bottom of the staple anvil plate B (200) is sleeved with a staple anvil pressing plate (203), the top of the staple anvil pressing plate (203) is symmetrically fixed with a limiting column (204) movably penetrating through the staple anvil plate B (200), the outer circumferential surface of a plurality of the limiting columns (204) is welded with a limiting ring (205), a plurality of the limiting columns (204) movably penetrate through a lower pressing plate (206), the outer circumferential surface of a plurality of the limiting columns (204) is sleeved with a compression spring (207) abutting against the lower pressing plate (206) and the limiting ring (205) at two ends respectively. The top of the staple anvil plate B (200) is symmetrically fixed with a group of limiting plates (208), the inside of two the limiting plates (208) is provided with a limiting hole (2080), the limiting hole (2080) is inserted with an adjusting plate A (209) with one end bottom surface abutting against the top surface of the lower pressing plate (206), the top of the adjusting plate A (209) is welded with an adjusting plate B (210) with an inclined end, the top of the adjusting plate B (210) is welded with an adjusting plate C (211) with an inclined end.

2. The anastomat staple anvil assembly of claim 1 wherein: The bottom of the staple anvil plate B (200) is provided with a rectangular groove A (201), the diameter of the staple anvil pressing plate (203) is the same as the inner diameter size of the rectangular groove A (201).

3. The anastomat anvil assembly of claim 1 wherein: The bottom of the staple anvil pressing plate (203) is equidistantly provided with extrusion grooves (2030) for bending suture staples, the staple anvil pressing plate (203) is made of stainless steel.

4. The anastomat staple anvil assembly of claim 1 wherein: The top of the staple anvil plate B (200) is symmetrically provided with a rectangular groove B (202) abutting against the bottom of the limiting ring (205), the diameter of the rectangular groove B (202) is the same as the diameter of the lower pressing plate (206).

5. The anastomat staple anvil assembly of claim 1 wherein: One end of the adjusting plate A (209) is provided with a limiting block (2090).

6. The anastomat staple anvil assembly of claim 1 wherein: The thickness of the adjusting plate A (209), the adjusting plate B (210) and the adjusting plate C (211) is the same, the end of the adjusting plate A (209), the adjusting plate B (210) and the adjusting plate C (211) away from the limiting plate (208) is on the same plane.

7. The anastomat anvil assembly of claim 4 wherein: The end of the adjusting plate A (209), the adjusting plate B (210) and the adjusting plate C (211) away from the limiting plate (208) is fixed with a pushing block (212) with a bottom end slidingly connected with the top of the staple anvil plate B (200), the outer side surface of the rectangular groove B (202) is arc-shaped, the top of the staple anvil plate B (200) is fixed with a cover (213) inserted with the adjusting plate A (209), the adjusting plate B (210) and the adjusting plate C (211) on the two sides of the top of the staple anvil plate B (200) above the rectangular groove B (202).

8. The anastomat anvil assembly of claim 1 wherein: The two sides of the staple anvil pressing plate (203) are symmetrically fixed with side plates (2031), the two sides of the staple cartridge assembly (1) are symmetrically fixed with inclined plates (101) abutting against the side plates (2031).

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