Vascular cannula for rat liver transplantation

Abstract

The utility model discloses a blood vessel cannula for rat liver transplantation, which comprises a cylindrical cannula body, a through hole is arranged on the cannula body, one end of the cannula body is fixedly connected with a clamping handle, an annular binding groove is arranged on the outer wall of the cannula body, and the binding groove is positioned on one side far away from the clamping handle. According to the utility model, when a liver transplantation operation is carried out on a rat, an operator can use tweezers to clamp the clamping handle, clamp up the sleeve, then sleeve the tube body on one blood vessel and enable the blood vessel to pass through the through hole, and then turn one end of the blood vessel outwards and sleeve the outer wall of the tube body; finally, the other blood vessel is connected with the clamping handle in a sleeved mode and is bundled and fixed, the transplantation operation can be completed, in the operation process, tweezers clamp the clamping handle, the tube body can be made to be stable, the blood vessel can penetrate through the tube body more rapidly, and therefore the operation time is shortened, and the operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a vascular cannula for rat liver transplantation. Background Technology

[0002] Orthotopic liver transplantation in rats is an ideal model for basic research on liver transplantation. Currently, the commonly used rat liver transplantation method is the "two-cuff method" proposed by Kamada in 1979. This method requires an auxiliary device for operation. Specifically, one broken blood vessel is passed through a cuff, and the end of the blood vessel is turned outward. The turned-out blood vessel is then placed on the outside of the cuff, and the other blood vessel is placed on the blood vessel on the outside of the cuff. Finally, the two blood vessels are tied together. During the operation, it is necessary to quickly connect the two blood vessels to shorten the anhepatic period and increase the survival rate. However, there is currently no cuff specifically designed for rat liver transplantation. Therefore, there is a need for a vascular cuff for rat liver transplantation that is easy for medical personnel to operate, improves surgical efficiency, shortens the anhepatic period, and increases the survival rate of the organ. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a vascular cannula for rat liver transplantation.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A vascular cannula for rat liver transplantation includes a cylindrical tube body with a through hole. One end of the tube body is fixedly connected to a clamping handle, and an annular binding groove is formed on the outer wall of the tube body, with the binding groove located on the side away from the clamping handle.

[0006] Preferably, the junction between the sidewall of the binding groove and the outer wall of the tube is smoothly transitioned.

[0007] Preferably, the clamping handle is a rectangular plate structure.

[0008] Preferably, the clamping handle is inclined to the outside of the tube body.

[0009] Preferably, the tilt angle of the clamping handle is 10° to 15°.

[0010] Preferably, the clamping handle has a through clamping hole.

[0011] Preferably, the outer wall of the tube is provided with a raised strip, which is located in the middle of the tube and is used to prevent the blood vessel from sliding.

[0012] Preferably, the outer wall of the tube is provided with multiple anti-slip textures.

[0013] Preferably, the tube body and the clamping handle are integrally formed.

[0014] Preferably, the tube body and the clamping handle are made of polylactic acid.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] 1. In this utility model, the tube body is provided with a through hole for blood vessels to pass through. After the blood vessel passes through the through hole, one end of the blood vessel is turned outward so that the blood vessel is covered outside the tube body. Then, another blood vessel is placed on the blood vessel turned outward outside the tube body, and the two blood vessels are tied together. During the operation, the operator can use forceps to fix the clamping handle to prevent the tube body from shaking, making the operation more stable and thus speeding up the operation.

[0017] 2. In this utility model, the clamping handle is inclined to the outside of the tube body, so the clamping handle will not obstruct the blood vessel when it passes through the through hole, which can speed up the passage of the blood vessel.

[0018] 3. In this utility model, the tube body and the clamping handle are made of polylactic acid, which can be absorbed by the human body. Therefore, there is no need to remove the cannula by surgery again, thus avoiding secondary damage. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0020] In the diagram: 1 is the tube body, 2 is the through hole, 3 is the clamping handle, 4 is the binding groove, 5 is the clamping hole, and 6 is the protrusion. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 As shown, a vascular cannula for rat liver transplantation includes a cylindrical tube 1 with a through hole 2 penetrating the tube 1. The axis of the through hole 2 is collinear with the axis of the tube 1. A clamping handle 3 is fixedly connected to one end of the tube 1. The clamping handle 3 has a rectangular plate-like structure. An annular binding groove 4 is provided on the outer wall of the tube 1, located on the side of the tube 1 away from the clamping handle 3. Multiple binding grooves 4 can be provided, arranged in parallel. In this invention, when performing liver transplantation on rats, it is necessary to connect the blood vessels of the rat's body to the blood vessels of the transplanted liver to allow normal blood flow. First, the operator uses tweezers to grasp the clamping handle 3, then places the tube 1 onto one of the blood vessels, allowing the blood vessel to pass through the through hole 2 and turning the broken end of the blood vessel outward so that the outwardly turned blood vessel is placed on the outer wall of the tube 1. An annular protrusion 6 is provided on the outer wall of the tube 1. The protrusion 6 is located in the middle of the tube body 1. The everted blood vessel can wrap around the protrusion 6. The vertical cross-section of the protrusion 6 is a right trapezoid. The protrusion 6 can prevent the blood vessel from moving on the tube body 1, thereby preventing the blood vessel from falling off the tube body 1. After the blood vessel is everted and sleeved on the tube body 1, another blood vessel connected to it is sleeved on the blood vessel on the tube body 1. Finally, the two blood vessels are tied together with a binding thread. The binding thread is located at the binding groove 4. After binding, the binding thread can enter the binding groove 4 to prevent it from falling off later. The binding thread is made of absorbable material that can be absorbed by the human body. After the two blood vessels are tied and fixed together, they can grow and connect normally after a period of time, providing normal blood supply to the transplanted liver. During the transplantation process, the operator uses forceps to grasp the clamping handle 3, which can make the tube body 1 more stable and make the blood vessel passage faster, thereby improving the speed of the operation and reducing the time of anhepatic period.

[0025] Furthermore, the end of the tube body 1 away from the clamping handle 3 is rounded, which can prevent the tube body 1 from damaging the blood vessel after the blood vessel is everted and fitted onto the tube body 1.

[0026] Furthermore, there are two binding grooves 4, and the side wall of the binding groove 4 smoothly transitions to the outer wall of the tube body 1, allowing the binding line to slide into the binding groove 4 during the binding process.

[0027] Furthermore, the clamping handle 3 is inclined to the outside of the tube body 1, and the angle between the clamping handle 3 and the vertical plane is 10° to 15°. When clamping the clamping handle 3, since the clamping handle 3 is inclined to the outside, the blood vessel can pass smoothly through the through hole 2 without being obstructed by the clamping handle 3, thereby speeding up the operation.

[0028] Furthermore, the clamping handle 3 is provided with a through clamping hole 5, which is used to clamp the clamping handle 3 with tweezers. When using toothed tweezers, the head of the toothed tweezers can be passed through the clamping hole 5 to clamp the sleeve and then perform subsequent operations.

[0029] Furthermore, the tube body 1 and the clamping handle 3 are integrally formed structures, and the tube body 1 and the clamping handle 3 are made of polylactic acid. After the surgery, the two blood vessels can grow and connect together, and the tube body 1 and the clamping handle 3 can be absorbed by the human body, so there is no need to perform tube removal surgery again, thus avoiding secondary damage.

[0030] Furthermore, the outer diameter of the tube body 1 is 1.5mm to 2.5mm, and the diameter of the through hole 2 is 2mm to 2.5mm, to accommodate the size of rat blood vessels.

[0031] In another embodiment, the outer wall of the tube body 1 is provided with anti-slip textures or anti-slip protrusions. After the blood vessel is everted and fitted onto the outer wall of the tube body 1, the anti-slip textures or anti-slip protrusions can prevent the blood vessel from sliding on the outer wall of the tube body 1 and causing the blood vessel to fall off.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vascular cannula for rat liver transplantation, characterized in that, It includes a cylindrical tube (1) with a through hole (2) on the tube (1), a clamping handle (3) fixedly connected to one end of the tube (1), and at least one annular binding groove (4) on the outer wall of the tube (1), the binding groove (4) being located on the side away from the clamping handle (3).

2. The vascular cannula for rat liver transplantation according to claim 1, characterized in that, The side wall of the binding groove (4) and the outer wall of the tube body (1) are smoothly connected.

3. The vascular cannula for rat liver transplantation according to claim 1, characterized in that, The clamping handle (3) is a rectangular plate structure.

4. The vascular cannula for rat liver transplantation according to claim 3, characterized in that, The clamping handle (3) is inclined to the outside of the tube body (1).

5. A vascular cannula for rat liver transplantation according to claim 4, characterized in that, The tilt angle of the clamping handle (3) is 10° to 15°.

6. The vascular cannula for rat liver transplantation according to claim 1, characterized in that, The clamping handle (3) has a through clamping hole (5).

7. The vascular cannula for rat liver transplantation according to claim 1, characterized in that, The outer wall of the tube (1) is provided with a protrusion (6), which is located in the middle of the tube (1) and is used to prevent blood vessels from sliding.

8. A vascular cannula for rat liver transplantation according to claim 1, characterized in that, The outer wall of the tube (1) is provided with anti-slip texture.

9. A vascular cannula for rat liver transplantation according to claim 1, characterized in that, The tube body (1) and the clamping handle (3) are integrally formed.

10. A vascular cannula for rat liver transplantation according to claim 1, characterized in that, The tube body (1) and the clamping handle (3) are made of polylactic acid.

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