An apparatus for connecting a lymphatic vessel and a blood vessel

Abstract

This invention discloses an instrument for connecting lymphatic vessels and blood vessels, comprising a vascular connecting tube, a connecting lumbar tube, and at least one connecting branch tube. The connecting branch tube includes interconnected primary and secondary branches, through which lymph fluid can enter the bloodstream. This instrument enables a stable connection between lymphatic vessels and blood vessels via the instrument itself, rather than relying solely on surgical sutures. This simplifies the surgical procedure, reduces the stringent requirements on the surgeon's skills, significantly reduces the difficulty and risk of the surgery, decreases the incidence of postoperative complications, improves patient recovery speed and treatment effectiveness, and provides a more convenient and reliable connection method, greatly enhancing the convenience, safety, and effectiveness of connecting lymphatic vessels and blood vessels.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a device for connecting lymphatic vessels and blood vessels. Background Technology

[0002] Lymphaticovenous anastomosis (LVA) is an important surgical procedure for treating lymphatic drainage disorders and related diseases such as Alzheimer's disease. The core of this surgery lies in anastomosing lymphatic vessels with adjacent veins, establishing a drainage pathway for lymphatic fluid into the venous system. In recent years, in particular, deep cervical lymphaticovenous anastomosis has shown great potential in improving Alzheimer's disease symptoms, as it works by draining cerebral lymph to remove deposited harmful proteins. Currently, most clinically used LVA surgeries employ direct suturing to connect the lymphatic vessels and veins.

[0003] However, surgical suturing is a highly demanding and difficult task that requires a high level of skill from the surgeon. This is especially true for very fine blood vessels or lymphatic vessels. Not only does it require the surgeon to maintain a high level of concentration for a long time, but the fragility of lymphatic tissue also makes it easy for tears to occur during the suturing process. This increases the risk of reflux or leakage and may lead to serious postoperative complications, thus making the connection extremely difficult and risky. Summary of the Invention

[0004] The main objective of this invention is to provide an instrument for connecting lymphatic vessels and blood vessels, in order to solve the problems of high difficulty and high risk associated with relying solely on suturing in the prior art.

[0005] To achieve the above objectives, the present invention proposes an instrument for connecting lymphatic vessels and blood vessels, comprising: a vascular connecting tube, a connecting lumbar tube, and at least one connecting branch tube; The vascular connecting tube is centrally located with openings at both ends and a through hole on its outer peripheral wall. The vascular connecting tube can be inserted into the blood vessel through an incision in the side wall of the blood vessel. The connecting waist tube has a first end and a second end. The connecting waist tube has a guide channel that passes through the first end and the second end. The first end is connected to the outer peripheral wall of the blood vessel connecting tube and communicates with the through hole. The connecting branch tube includes a primary branch tube and a secondary branch tube that are interconnected. One end of the primary branch tube is connected to the second end of the connecting waist tube and is connected to the guide channel. One end of the primary branch tube closes the second end. The other end of the primary branch tube is connected to one end of the secondary branch tube. The other end of the secondary branch tube is used to connect to the lymphatic vessel. The primary branch and the secondary branch differ in at least one of their materials and hardness. Lymph can enter the bloodstream through the secondary branch, the primary branch, the connecting lumbar tube, and the vascular connecting tube.

[0006] Furthermore, the primary branch pipe is a flexible tube, and the secondary branch pipe is a rigid tube.

[0007] Furthermore, the secondary branch pipe is a rigid metal pipe.

[0008] Furthermore, the outer wall of the secondary branch is provided with annular protrusions or barbs for fixing the lymphatic vessels.

[0009] Furthermore, the secondary branch pipe is a straight pipe or a bent pipe.

[0010] Furthermore, the primary branch pipe is equipped with anchoring elements.

[0011] Furthermore, the diameter of the flow channel gradually decreases from the second end to the first end.

[0012] Furthermore, the flow channel is a spiral channel, and the diameter of the spiral gradually decreases from the second end to the first end.

[0013] Furthermore, the equation for the spiral extension curve of the flow guide channel in Cartesian coordinates is: X(t)=1 / 2*(D2-(D2-D1)*t)*cos(2π*n*t) , Y(t)=1 / 2*(D2-(D2-D1)*t)*sin (2π*n*t) , Z(t) = L*t, Wherein, D1 represents the spiral diameter of the guide channel at the first end, D2 represents the spiral diameter of the guide channel at the second end, L represents the axial height of the guide channel, n represents the number of spiral turns, and t is a coefficient, with a value ranging from 0 to 1.

[0014] Furthermore, the inner diameter of the flow guiding channel is 0.1 mm to 4.0 mm, and the helix angle of the flow guiding channel is 10° to 60°.

[0015] The beneficial effects of the technical solution of this invention are as follows: The present invention relates to an instrument for connecting lymphatic vessels and blood vessels. By incorporating a vascular connecting tube, a connecting lumbar tube, and at least one connecting branch tube (which includes a primary branch tube and a secondary branch tube), the instrument connects the lymphatic vessels and blood vessels by inserting the vascular connecting tube into the vein through an incision in the side wall of the vein. The lymphatic vessel is then fitted onto the outer wall of the secondary branch tube. Lymph can then enter the bloodstream through the interconnected secondary branch tube, primary branch tube, connecting lumbar tube, and vascular connecting tube. This solves the problem of relying solely on surgical sutures to connect lymphatic vessels and blood vessels, allowing for a stable connection via the instrument rather than solely relying on surgical sutures. This simplifies the surgical procedure, reduces the demanding requirements on the surgeon's skills, significantly reduces the difficulty and risk of the surgery, decreases the incidence of postoperative complications, improves patient recovery speed and treatment effectiveness, and provides a more convenient and reliable connection method, greatly enhancing the convenience, safety, and effectiveness of connecting lymphatic vessels and blood vessels. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a device for connecting lymphatic vessels and blood vessels according to an embodiment of the present invention; Figure 2 for Figure 1 Internal structure diagram of a Chinese medical instrument; Figure 3 for Figure 2 Schematic diagram of the spiral structure of the central flow channel.

[0017] Explanation of icon numbers: 100, Vascular connecting tube; 110, Opening; 120, Through hole; 200, Connecting waist tube; 210, First end; 220, Second end; 230, Drainage channel; 300, Connecting branch tube; 310, Primary branch tube; 320, Secondary branch tube; 330, Anchoring element. Detailed Implementation

[0018] The solutions in 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 a part of the embodiments of the present invention, and not all of them. 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. In addition, the descriptions involving "first," "second," etc., in the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0019] To address the technical deficiencies in related technologies, this invention provides an instrument for lymphatic vessel and vascular anastomosis. Please refer to [link to relevant documentation]. Figures 1 to 2The device for connecting lymphatic vessels and blood vessels includes: a vascular connecting tube 100, a connecting waist tube 200, and at least one connecting branch tube 300.

[0020] The vascular connecting tube 100 has a central opening and openings 110 at both ends. A through hole 120 is provided on the outer peripheral wall. The vascular connecting tube 100 can be inserted into the blood vessel through an incision in the side wall of the blood vessel.

[0021] The connecting waist tube 200 has a first end 210 and a second end 220. The connecting waist tube 200 has a guide channel 230 that passes through the first end 210 and the second end 220. The first end 210 is connected to the outer peripheral wall of the blood vessel connecting tube 100 and communicates with the through hole 120.

[0022] The connecting branch pipe 300 includes a primary branch pipe 310 and a secondary branch pipe 320 that are interconnected. One end of the primary branch pipe 310 is connected to the second end 220 of the connecting tube 200 and communicates with the drainage channel 230. One end of the primary branch pipe 310 closes the second end 220. The other end of the primary branch pipe 310 is connected to one end of the secondary branch pipe 320, and the other end of the secondary branch pipe 320 is used to connect to the lymphatic vessels. The primary branch pipe 310 and the secondary branch pipe 320 differ in at least one of their materials or hardness; that is, the primary branch pipe 310 and the secondary branch pipe 320 are made of different materials, or their hardness is different, or both their materials and hardness are different. Preferably, there are multiple connecting branch pipes 300, and multiple primary branch pipes 310 together close the second end 220. The multiple connecting branch pipes 300 are distributed and oriented in different directions. The multiple connecting branches 300 allow the device to connect to multiple lymphatic vessels, greatly increasing the drainage volume of lymph fluid and improving the treatment effect.

[0023] Lymph can enter the bloodstream through secondary branch 320, primary branch 310, connecting lumbar tube 200 and vascular connecting tube 100.

[0024] This instrument allows for the connection of lymphatic vessels and blood vessels. The vascular connection tube 100 is inserted into the vein through an incision in the side wall of the vessel. The lymphatic vessel is then fitted onto the outer wall of the secondary branch 320. Lymph can then flow into the bloodstream through the interconnected secondary branch 320, primary branch 310, connecting tube 200, and vascular connection tube 100. This solves the problem of relying solely on surgical sutures to connect lymphatic vessels and blood vessels. This instrument enables a stable connection between lymphatic vessels and blood vessels, rather than relying entirely on surgical sutures, simplifying the surgical procedure, reducing the demanding requirements on the surgeon's skills, significantly reducing the difficulty and risk of the surgery, decreasing the likelihood of postoperative complications, improving patient recovery speed and treatment effectiveness, and providing a more convenient and reliable connection method. This greatly enhances the convenience, safety, and effectiveness of connecting lymphatic vessels and blood vessels.

[0025] By setting up a primary branch 310 and a secondary branch 320, the primary branch 310 can be oriented in different directions, while the secondary branch 320 is specifically used to connect lymphatic vessels. This allows the instrument to conveniently connect lymphatic vessels of different distances and orientations to blood vessels. The primary branch 310 and the secondary branch 320 differ in at least one of their materials and hardness, resulting in different levels of toughness. This allows the orientation of the connecting branch 300 to be adjusted according to the various directions of the lymphatic vessels, facilitating connection with lymphatic vessels of different orientations and better adapting to human anatomy and surgical needs.

[0026] Furthermore, to better adjust the orientation of the connecting branch tube 300 according to surgical needs, the primary branch tube 310 is a soft tube, while the secondary branch tube 320 is a rigid tube. The soft nature of the primary branch tube 310 allows for some turning and adjustment after surgery or implantation, which in turn allows for some adjustment of the secondary branch tube 320. During surgery, it can anastomose lymphatic vessels with different orientations, and after implantation, the entire instrument can adapt to limb compression or pulling, which is more advantageous for surgery and implantation compared to a rigid tube. The rigid secondary branch tube 320, on the other hand, is more conducive to opening the lymphatic vessels during insertion and prevents them from being compressed and flattened by lymphatic vessel contraction, thus affecting lymphatic fluid flow. It is also more conducive to stable connection of lymphatic vessels and lymphatic fluid drainage. Furthermore, the secondary branch tube 320 is a metal rigid tube. In other cases, the secondary branch tube 320 can also be a rigid tube made of other materials, such as polyurethane, polylactic acid, or polytetrafluoroethylene.

[0027] The secondary branch pipe 320 is inserted into the interior of the primary branch pipe 310 for connection, or it can be connected by means of heat fusion, bonding, etc. The outer diameter of the secondary branch pipe 320 can be the same as or smaller than the outer diameter of the primary branch pipe 310.

[0028] To further enhance the stability of the connection and prevent lymphatic vessels from dislodging, the outer wall of the secondary branch 320 is provided with annular protrusions or barbs for fixing the lymphatic vessels. To facilitate the connection of lymphatic vessels with different orientations, the secondary branch 320 can be a straight or curved tube.

[0029] To further prevent lymphatic vessels from dislodging, the outer wall of the primary branch 310 is provided with an anchor 330 for anchoring the suture. The anchor 330 can be ring-shaped, ear-shaped, hook-shaped, protrusion, etc., any structure that allows the suture to overlap or be sewn together.

[0030] To prevent blood from flowing back into the instrument or lymphatic vessels and affecting the drainage effect of lymph fluid, the diameter of the drainage channel 230 gradually decreases from the second end 220 to the first end 210. Specifically, the axial cross-section of the drainage channel 230 can be conical or parabolic.

[0031] In other configurations, the flow channel 230 is configured as a spiral channel, with the diameter of the spiral gradually decreasing from the second end 220 to the first end 210.

[0032] Specifically, the equation for the spiral extension curve of the flow guide channel 230 in the Cartesian coordinate system is: X(t)=1 / 2*(D2-(D2-D1)*t)*cos(2π*n*t) , Y(t)=1 / 2*(D2-(D2-D1)*t)*sin (2π*n*t) , Z(t) = L*t, Wherein, D1 represents the spiral diameter (inner diameter) of the guide channel 230 at the first end 210, D2 represents the spiral diameter (inner diameter) of the guide channel 230 at the second end 220, L represents the axial height of the guide channel 230, n represents the number of spiral turns, and t is a coefficient, with a value ranging from 0 to 1.

[0033] Furthermore, the inner diameter of the flow channel 230 is 0.1 mm to 4.0 mm, and the helix angle of the flow channel 230 is 10° to 60°. By setting a spiral flow channel 230 and gradually reducing the diameter of the spiral from the second end 220 to the first end 210, the centripetal force and pipe resistance of the spiral channel can be used to make the lymph fluid flow more smoothly into the blood, while the blood is difficult to flow back, thus effectively preventing blood reflux.

[0034] This device, through the inclusion of a vascular connecting tube 100, a connecting waist tube 200, and at least one connecting branch tube 300, including a primary branch tube 310 and a secondary branch tube 320, allows lymphatic fluid to enter the bloodstream through the interconnected secondary branch tube 320, primary branch tube 310, connecting waist tube 200, and vascular connecting tube 100. This solves the problem of relying solely on surgical sutures to connect lymphatic vessels and blood vessels. This device enables a stable connection between lymphatic vessels and blood vessels using the device itself, rather than solely relying on surgical sutures, thus simplifying the surgical procedure, reducing the demanding requirements on the surgeon's skills, significantly reducing the difficulty and risk of surgery, decreasing the incidence of postoperative complications, improving patient recovery speed and treatment effectiveness, and providing a more convenient and reliable connection method, greatly enhancing the convenience, safety, and effectiveness of lymphatic vessel and blood vessel connections.

[0035] The above description is only a part or preferred embodiment of the present invention. Neither the text nor the drawings should limit the scope of protection of the present invention. All equivalent structural transformations made using the content of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A device for connecting lymphatic vessels and blood vessels, characterized in that, include: Vascular connecting tube, lumbar connecting tube, and at least one connecting branch tube; The vascular connecting tube is centrally located with openings at both ends and a through hole on its outer peripheral wall. The vascular connecting tube can be inserted into the blood vessel through an incision in the side wall of the blood vessel. The connecting waist tube has a first end and a second end. The connecting waist tube has a guide channel that passes through the first end and the second end. The first end is connected to the outer peripheral wall of the blood vessel connecting tube and communicates with the through hole. The connecting branch tube includes a primary branch tube and a secondary branch tube that are interconnected. One end of the primary branch tube is connected to the second end of the connecting waist tube and is connected to the guide channel. One end of the primary branch tube closes the second end. The other end of the primary branch tube is connected to one end of the secondary branch tube. The other end of the secondary branch tube is used to connect to the lymphatic vessel. The primary branch and the secondary branch differ in at least one of their materials and hardness. Lymph can enter the bloodstream through the secondary branch, the primary branch, the connecting lumbar tube, and the vascular connecting tube.

2. The device for connecting lymphatic vessels and blood vessels according to claim 1, characterized in that, The primary branch pipe is a flexible tube, and the secondary branch pipe is a rigid tube.

3. The device for connecting lymphatic vessels and blood vessels according to claim 2, characterized in that, The secondary branch pipe is a rigid metal pipe.

4. The device for connecting lymphatic vessels and blood vessels according to claim 1, characterized in that, The outer wall of the secondary branch is provided with annular protrusions or barbs for fixing the lymphatic vessels.

5. The device for connecting lymphatic vessels and blood vessels according to claim 1, characterized in that, The secondary branch pipe is either a straight pipe or a bent pipe.

6. The device for connecting lymphatic vessels and blood vessels according to claim 1, characterized in that, The primary branch pipe is equipped with anchoring elements.

7. The device for connecting lymphatic vessels and blood vessels according to claim 1, characterized in that, The diameter of the flow channel gradually decreases from the second end to the first end.

8. The device for connecting lymphatic vessels and blood vessels according to claim 1, characterized in that, The flow channel is a spiral channel, and the diameter of the spiral gradually decreases from the second end to the first end.

9. The device for connecting lymphatic vessels and blood vessels according to claim 8, characterized in that, The equation for the spiral extension curve of the flow guide channel in Cartesian coordinates is: X(t)=1 / 2*(D2-(D2-D1)*t)*cos(2π*n*t) , Y(t)=1 / 2*(D2-(D2-D1)*t)*sin (2π*n*t) , Z(t) = L*t, Wherein, D1 represents the spiral diameter of the guide channel at the first end, D2 represents the spiral diameter of the guide channel at the second end, L represents the axial height of the guide channel, n represents the number of spiral turns, and t is a coefficient, with a value ranging from 0 to 1.

10. The device for connecting lymphatic vessels and blood vessels according to claim 9, characterized in that, The inner diameter of the flow guiding channel is 0.1 mm to 4.0 mm, and the helix angle of the flow guiding channel is 10° to 60°.

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