Punching instrument for anastomosis hole in end side of blood vessel

Abstract

The utility model relates to the technical field of medical auxiliary instruments, and discloses a blood vessel end side anastomosis hole punching instrument which comprises a pistol-shaped shell, a handle and a trigger. The cutting assembly comprises an outer cutter assembly and an inner cutter assembly which is sleeved with the outer cutter assembly and slides left and right in the horizontal direction of an outer cutter rod of the outer cutter assembly; a limiting groove is formed in the end, away from the shell, of the outer cutter bar, and an outer tooth cutter edge is arranged in the limiting groove. The head end of an inner cutter rod of the inner cutter assembly is provided with an inner tooth cutter edge meshed with the outer tooth cutter edge. The reset spring is arranged on the connecting rod of the inner cutter assembly in a sleeving manner and is arranged at the joint of the inner cutter assembly and the outer cutter assembly; according to the vascular end side anastomosis hole punching instrument, the cutting assembly and the reset spring are adopted, tissue is cut off through opposite movement of the cutter bodies, the edge of an anastomosis hole is made to be neat, it is guaranteed that the cut side hole has the ideal hole diameter, and operation efficiency and safety are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, and in particular to a device for drilling holes for end-to-side anastomosis holes in blood vessels. Background Technology

[0002] With the improvement of medical technology and medical devices, the application of free flaps in clinical practice has become more widespread. When transplanting free flaps, the donor and recipient vessels can be anastomosed end-to-end or end-to-side, with end-to-side anastomosis being the main clinical application at present. There are more than 3 million trauma patients in my country every year, and some of these patients have more severe trauma and need flap transplantation.

[0003] Existing scissor-type cutting instruments rely on manual operation, which takes a long time to prepare. Furthermore, straight or curved tissue scissors are prone to slippage, resulting in unstable control of blood vessels. In addition, the tools cannot form an ideal anastomosis hole in one go, usually requiring multiple trimmings, which increases the damaged area and results in uneven edges, affecting the suturing effect. The control of the hole diameter also mainly relies on experience and judgment, which is difficult to be precise and may lead to inconsistent anastomosis hole sizes, thereby prolonging the overall operation time or affecting the leakage prevention effect after anastomosis and suturing.

[0004] Therefore, there is an urgent need to design a perforation device for end-to-side anastomosis of blood vessels that can solve the above technical problems. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a perforation instrument for end-to-side anastomosis holes in blood vessels to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0007] A perforation device for end-to-side anastomosis of blood vessels includes a pistol-shaped housing, a handle, and a trigger;

[0008] It also includes a cutting assembly, which includes an outer blade assembly and an inner blade assembly that is sleeved inside the outer blade assembly and slides horizontally left and right along the outer blade rod of the outer blade assembly; a limiting groove is provided at the end of the outer blade rod away from the housing and an outer toothed cutting edge is provided in the limiting groove; the head end of the inner blade rod of the inner blade assembly is provided with an inner toothed cutting edge that meshes with the outer toothed cutting edge.

[0009] It also includes a return spring, which is sleeved on the sleeve of the inner blade assembly and located at the connection between the inner blade assembly and the outer blade assembly.

[0010] Furthermore, the inner blade assembly includes an inner blade holder, a sleeve, and an inner blade rod connected in sequence;

[0011] The inner tool bar is inserted through an opening at the tail end of the outer tool bar, and a return spring is fitted on the sleeve.

[0012] The tail end of the inner handle is engaged with the lever of the trigger.

[0013] Furthermore, the outer blade assembly includes a hollow outer blade holder and an outer blade rod disposed at the front end of the outer blade holder;

[0014] The outer tool holder, inner tool holder, and sleeve are fitted into the hollow cavity of the housing.

[0015] Furthermore, the trigger is mounted on the outside of the curved portion of the handle, and includes a wrench, a rotating shaft, and a lever;

[0016] The wrench is L-shaped and has a rotating shaft fixed inside the curved part of the handle. The rocker arm is connected to the other end of the wrench and has a hemispherical groove at its end.

[0017] Furthermore, both the external and internal cutting edges are provided with intermeshing serrated blades on opposite sides.

[0018] Compared with the prior art, the beneficial effects of this utility model are mainly reflected in:

[0019] Compared to the shortcomings of existing scissor-based cutting instruments, this utility model provides a vascular end-to-side anastomosis hole punching instrument that utilizes a cutting component and a return spring. Through a one-piece forming design, it significantly shortens the operation time. Employing a toothed circular blade and a vascular limiting groove, and equipped with front and rear blades, it cuts tissue using counter-current motion. The toothed blade design enhances holding force and prevents slippage. This not only ensures neat anastomosis hole edges and reduces the damaged area, but also allows for selection of the appropriate blade size based on the diameter of the target vessel, ensuring the cut side hole is of the ideal diameter, effectively improving surgical efficiency and safety.

[0020] The above description is only an overview of the technical solution of this utility model. In order to clearly understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a perspective view of a vascular end-to-side anastomosis hole punching instrument according to the present invention;

[0023] Figure 2 This is a front view of a vascular end-to-side anastomosis hole punching instrument according to the present invention;

[0024] Figure 3 This is a structural diagram of a vascular end-to-side anastomosis hole punching device according to the present invention;

[0025] Figure 4 This is a structural diagram of the cutting component of this utility model;

[0026] Figure 5 This is a structural diagram of the trigger of this utility model;

[0027] Figure 6 For the present utility model Figure 3 Enlarged view of section A;

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Housing; 2. Cutting assembly; 3. Handle; 4. Trigger; 5. Return spring;

[0030] 11. Hollow cavity;

[0031] 21. Outer blade assembly; 22. Inner blade assembly;

[0032] 211. Outer tool holder; 212. Limiting groove; 213. Outer toothed cutting edge; 214. Outer tool shank;

[0033] 221. Inner tool holder; 222. Connecting rod; 223. Sleeve; 224. Inner tool shank; 225. Internal tooth cutting edge;

[0034] 41. Wrench; 42. Rotating shaft; 43. Rocker arm; Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0036] like Figure 1-6 As shown, the present invention provides a vascular end-to-side anastomosis hole punching instrument, including a pistol-shaped housing 1, a handle 3 and a trigger 4. The housing 1 is designed in this way to conform to ergonomics and facilitate single-handed operation by medical staff during surgery.

[0037] It also includes a cutting assembly 2, which comprises an outer blade assembly 21 and an inner blade assembly 22 that is sleeved inside the outer blade assembly 21 and slides horizontally left and right along the outer blade rod 211 of the outer blade assembly 21. The cutting assembly 2 consists of an inner blade and an outer blade. The outer blade assembly 21 serves as a fixed structure, providing an initial fixed position for cutting. The inner blade assembly 22 can slide horizontally inside the outer blade assembly 21, with the sliding path along the horizontal direction to ensure cutting accuracy. The inner blade assembly 22 and the outer blade assembly 21 are in sliding engagement. To complete the drilling action of the end-side mating hole; the outer blade 211 has a limiting groove 212 at the end away from the housing 1 and an outer toothed cutting edge 213 is provided in the limiting groove 212; the head end of the inner blade 221 of the inner blade assembly 22 is provided with an inner toothed cutting edge 225 that meshes with the outer toothed cutting edge 213. The inner toothed cutting edge 225 corresponds to the outer toothed cutting edge 213 and achieves precise meshing. Through the toothed design, the inner and outer cutting edges form a stable cutting surface during the meshing process, thereby enhancing the stability of cutting and drilling;

[0038] It also includes a reset spring 5, which is sleeved on the sleeve 223 of the inner knife assembly 22 and located at the connection between the inner knife assembly 22 and the outer knife assembly 21. The reset spring 5 ensures that the inner knife assembly 22 automatically resets after use, maintains the stability of the instrument in the non-use state, and improves operating efficiency.

[0039] Furthermore, the inner blade assembly 22 includes an inner blade handle 224, a sleeve 223, and an inner blade rod 221 connected in sequence. The inner blade rod 221 is the main body of the inner blade assembly 22 and realizes the cutting function. The sleeve 223 is used to connect the return spring 5 between the inner blade assembly 22 and the outer blade assembly 21. The inner blade handle 224 realizes the transmission function. The sequential connection of each part ensures the overall structural stability of the assembly.

[0040] The inner blade 221 is inserted into the opening at the tail end of the outer blade 211 to ensure smooth cutting action. The sleeve 223 is fitted with a return spring 5 to ensure that the inner blade 221 can automatically return to its original position after cutting, so that the instrument does not need to be manually adjusted and reset before it is used again.

[0041] The tail end of the inner blade holder 224 is engaged with the swing arm 43 of the trigger 4. When the trigger 4 is operated, the swing arm 43 drives the inner blade holder 224, causing the inner blade rod 221 to slide back and forth, thereby completing the cutting and ensuring the effectiveness of the transmission.

[0042] Furthermore, the outer blade assembly 21 includes a hollow outer blade handle 214 and an outer blade rod 211 disposed at the front end of the outer blade handle 214. The outer blade handle 214 provides fixing and support, while the hollow interior facilitates the insertion and sliding of the inner blade assembly 22.

[0043] The outer blade holder 214, the inner blade holder 224, and the sleeve 223 are fitted into the hollow cavity 11 of the housing 1. The hollow cavity 11 provides sufficient internal space for the cutting assembly 2, forming a fixed and operable whole, ensuring the stability of the cutting assembly 2 within the housing 1.

[0044] Furthermore, the trigger 4 is installed on the outside of the curved part of the handle 3, and includes a wrench 41, a rotating shaft 42 and a rocker arm 43. The trigger 4 is located on the outside of the curved part of the handle 3, which is convenient for one-handed operation. The wrench 41 is fixed inside the handle 3 through the rotating shaft 42, and the trigger 4 is pressed by rotation. The rocker arm 43 is connected to the other end of the wrench 41 and transmits the action of the trigger 4 to the cutting assembly 2 to realize the cutting function.

[0045] The wrench 41 is L-shaped and ergonomic, providing a comfortable grip. The wrench 41 is equipped with a rotating shaft 42, which serves as the fulcrum of the wrench 41. The rotating shaft 42 is fixed inside the curved part of the handle 3 to ensure smooth rotation of the wrench 41. The rocker arm 43 is connected to the other end of the wrench 41, and the end of the rocker arm 43 is provided with a hemispherical groove, which provides a stable engagement with the tail end of the inner handle 224.

[0046] Furthermore, the external toothed blade 213 and the internal toothed blade 225 are each provided with intermeshing serrated blades on opposite sides. The serrated blades can effectively improve cutting efficiency and ensure that ideal cutting results can be achieved under different blood vessel conditions.

[0047] The working principle and usage process of this technical solution are as follows: During use, the operator should first select a suitable instrument according to the diameter of the target blood vessel, place the target blood vessel into the limiting groove 212, then hold the handle and press the trigger 4. Under the action of the lever, the inner blade assembly 22 moves forward. Since the outer blade assembly 21 is fixed, the inner blade rod 221 and the outer blade rod 211 begin to move relative to each other, thereby achieving the cutting of the blood vessel. After the cutting is completed, the operator can release the trigger 4 to return the blade to the initial position, which is convenient for subsequent operations or removal of the cut blood vessel. With this design, the diameter of the anastomosis hole can be ideally controlled in one forming, avoiding the tissue damage and uneven edges caused by multiple cuts due to traditional manual trimming. This not only improves surgical efficiency but also reduces surgical risks and enhances the success rate of the surgery.

[0048] The present invention has been further described above with reference to the embodiments, but 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 perforation device for end-to-side anastomosis holes in blood vessels, characterized in that: It includes a pistol-shaped casing (1), a handle (3), and a trigger (4); It also includes a cutting assembly (2), which includes an outer blade assembly (21) and an inner blade assembly (22) that is sleeved inside the outer blade assembly (21) and slides horizontally along the outer blade rod (211) of the outer blade assembly (21); a limiting groove (212) is provided at the end of the outer blade rod (211) away from the housing (1) and an outer toothed cutting edge (213) is provided in the limiting groove (212); the head end of the inner blade rod (221) of the inner blade assembly (22) is provided with an inner toothed cutting edge (225) that meshes with the outer toothed cutting edge (213); It also includes a return spring (5), which is sleeved on the sleeve (223) of the inner blade assembly (22) and located at the connection between the inner blade assembly (22) and the outer blade assembly (21).

2. The vascular end-to-side anastomosis hole punching instrument according to claim 1, characterized in that: The inner blade assembly (22) includes an inner blade holder (224), a sleeve (223), and an inner blade rod (221) connected in sequence; The inner knife bar (221) is inserted into the opening at the tail end of the outer knife bar (211), and a return spring (5) is sleeved on the sleeve (223); The tail end of the inner handle (224) is engaged with the lever (43) of the trigger (4).

3. The vascular end-side anastomosis hole punching instrument according to claim 1, characterized in that: The outer blade assembly (21) includes a hollow outer blade holder (214) and an outer blade rod (211) located at the front end of the outer blade holder (214); The outer handle (214), inner handle (224), and sleeve (223) are fitted into the hollow cavity (11) of the housing (1).

4. The vascular end-to-side anastomosis hole punching instrument according to claim 1, characterized in that: The trigger (4) is mounted on the outside of the curved part of the handle (3), and includes a wrench (41), a rotating shaft (42) and a rocker arm (43); The wrench (41) is L-shaped and has a rotating shaft (42) fixed inside the curved part of the handle (3). The swing rod (43) is connected to the other end of the wrench (41) and the end of the swing rod (43) has a hemispherical groove.

5. The vascular end-to-side anastomosis hole punching instrument according to claim 1, characterized in that: The external toothed cutting edge (213) and the internal toothed cutting edge (225) are each provided with intermeshing serrated cutting edges on opposite sides.

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