A conduit connection device for a ready-to-use vascular prosthesis

Abstract

The utility model relates to hemodialysis technical field especially, it is a kind of pipeline connecting device of immediate wear type artificial blood vessel, including subcutaneous tissue layer, the skin layer of being in the upper layer of subcutaneous tissue layer, the venous blood vessel and arterial blood vessel being arranged between subcutaneous tissue layer and skin layer and the artificial blood vessel being established between venous blood vessel and arterial blood vessel. In the utility model, the original artificial blood vessel structure is improved scientifically and rationally, venous transfusion port, arterial transfusion port, oval puncture bevel and rubber septum are arranged on artificial blood vessel, artificial blood vessel can be embedded between subcutaneous tissue layer and skin layer, and skin puncture hill, which is convenient for puncture needle to puncture and position, can be formed on skin layer, effectively reduce the risk problems such as surgical trauma, puncture risk, catheter infection, central vein stenosis and even occlusion of hemodialysis process of hemodialysis patient, thereby improve the security and stability of actual hemodialysis use.

Description

Technical Field

[0001] This utility model relates to the field of hemodialysis technology, and in particular to a tube connection device for a wearable artificial blood vessel. Background Technology

[0002] Autogenous arteriovenous fistulas, as an important vascular access for end-stage renal disease patients undergoing maintenance hemodialysis, have a higher overall patency rate than artificial arteriovenous fistulas and are therefore widely recognized as the preferred hemodialysis access route.

[0003] like Figure 5 The diagram shows an artificial blood vessel connecting arteries and veins and located between the subcutaneous tissue layer and the skin layer. To facilitate the connection between the puncture needle and the artificial blood vessel, part of the artificial blood vessel is usually extended above the skin layer. However, some patients have poor vascular conditions and cannot undergo autogenous arteriovenous fistula surgery or have experienced occlusion after multiple autogenous fistula surgeries. For these patients, it is necessary to create an artificial blood vessel fistula.

[0004] Standard expanded polytetrafluoroethylene (ePTFE) implants used to construct arteriovenous graft fistulas (AVGs) require central venous dialysis catheters (CVCs) as a transitional alternative pathway. However, using CVCs may introduce risks associated with implantation surgery, puncture, catheter infection, and central venous stenosis or even occlusion. After implantation, standard ePTFE implants require a 2-3 week waiting period to allow a fibrous tissue layer to form within the vessel before puncture. The relatively thin vessel wall increases the risk of puncture site bleeding, necessitating a waiting period for fibrous tissue formation to reduce this risk. Ordinary PTFE implants also have a relatively high incidence of pseudoaneurysms and a higher risk of infection. Utility Model Content

[0005] The purpose of this invention is to address the problems of traditional artificial blood vessel structures, such as the inconvenience of establishing a connection between the puncture needle and the artificial blood vessel, and the safety and risks involved in its use. Therefore, this invention proposes a pipe connection device for an artificial blood vessel that can be inserted immediately.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tube connection device for a wearable artificial blood vessel includes a subcutaneous tissue layer, a skin layer above the subcutaneous tissue layer, venous and arterial vessels disposed between the subcutaneous tissue layer and the skin layer, and an artificial blood vessel established between the venous and arterial vessels. The artificial blood vessel is provided with an infusion port structure that establishes a tube connection with the venous or arterial vessels.

[0008] As a further description of the above technical solution:

[0009] The artificial blood vessel is an integral structure, and the artificial blood vessel is distributed in a U-shape between the subcutaneous tissue layer and the skin layer, and connects between the veins and arteries.

[0010] As a further description of the above technical solution:

[0011] The artificial blood vessel has a segmented structure, with both segments located between the subcutaneous tissue layer and the skin layer, and connected to the veins and arteries respectively.

[0012] As a further description of the above technical solution:

[0013] The infusion port structure includes a venous infusion port connected to the end of the artificial blood vessel near the venous vessel and an arterial infusion port connected to the end of the artificial blood vessel near the arterial vessel.

[0014] As a further description of the above technical solution:

[0015] Both the venous infusion port and the arterial infusion port are hollow frustum-shaped structures. Each of the venous infusion port and the arterial infusion port has an elliptical puncture incline at its upper end, and a rubber diaphragm is installed on the inner side of the elliptical puncture incline.

[0016] As a further description of the above technical solution:

[0017] The portions of the venous infusion port and arterial infusion port that connect to the artificial blood vessel are all integrally and fixedly connected with a connecting seat.

[0018] As a further description of the above technical solution:

[0019] A supradermal puncture mound is formed on the skin layer above the venous and arterial infusion ports for determining their location and guiding the direction of needle insertion.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] In this invention, the original artificial blood vessel structure has been scientifically and rationally improved. A venous infusion port, an arterial infusion port, an elliptical puncture bevel, and a rubber diaphragm are incorporated into the artificial blood vessel. Post-operatively, the entire artificial blood vessel and its connecting device are positioned between the subcutaneous tissue layer and the skin layer. Medical personnel can determine the location of the venous and arterial infusion ports by observing the supracutaneous puncture mounds on the skin layer. Then, the puncture needle can be inserted through the bevel of the supracutaneous puncture mounds to establish a connection with the venous or arterial infusion port via the skin layer and the rubber diaphragm. This structure allows the entire artificial blood vessel to be embedded between the subcutaneous tissue layer and the skin layer, while simultaneously forming supracutaneous puncture mounds on the skin layer for convenient needle placement. This effectively reduces the risks of surgical trauma, puncture, catheter infection, central venous stenosis, and even occlusion during hemodialysis for hemodialysis patients, thereby improving the safety and stability of actual hemodialysis use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the tubing connection device for a wearable artificial blood vessel for hemodialysis patients in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the tubing connection device for the wearable artificial blood vessel used by hemodialysis patients in Example 1.

[0024] Figure 3 This is a schematic diagram of the tubing connection device for a wearable artificial blood vessel for hemodialysis patients in Embodiment 2 of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the tubing connection device for the wearable artificial blood vessel used by hemodialysis patients in Example 2;

[0026] Figure 5 This is a schematic diagram of the structure of an artificial blood vessel built for a hemodialysis patient in the existing technology.

[0027] Legend:

[0028] 1. Subcutaneous tissue layer; 2. Skin layer; 201. Subcutaneous puncture hill; 3. Vein; 4. Artery; 5. Artificial blood vessel; 6. Venous infusion port; 7. Arterial infusion port; 8. Elliptical puncture oblique opening; 9. Rubber diaphragm; 10. Connecting seat. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] Please see Figure 1-5 This utility model provides a technical solution: a tube connection device for a puncture-type artificial blood vessel, including a subcutaneous tissue layer 1, a skin layer 2 above the subcutaneous tissue layer 1, a venous vessel 3 and an arterial vessel 4 disposed between the subcutaneous tissue layer 1 and the skin layer 2, and an artificial blood vessel 5 established between the venous vessel 3 and the arterial vessel 4. The artificial blood vessel 5 is provided with an infusion port structure for accurately, quickly and safely establishing a tube connection between the puncture needle and the venous vessel 3 or the arterial vessel 4.

[0032] Specifically, such as Figure 1 and Figure 2 As shown, the artificial blood vessel 5 is an integrated structure, and it is distributed in a U-shape between the subcutaneous tissue layer 1 and the skin layer 2, connecting the vein 3 and the artery 4. This combination structure of the artificial blood vessel 5 with the venous infusion port 6 and the artery infusion port 7 allows for infusion or blood aspiration / exchange operations on the vein 3 and the artery 4 respectively, without affecting the establishment of a bridge between the vein 3 and the artery 4. The probability of thrombosis is relatively small because the blood between the vein 3 and the artery 4 can be connected through the artificial blood vessel 5.

[0033] Specifically, such as Figure 1-4 As shown, the infusion port structure includes a venous infusion port 6 connected to the end of the artificial blood vessel 5 near the venous vessel 3 and an arterial infusion port 7 connected to the end of the artificial blood vessel 5 near the arterial vessel 4. Both the venous infusion port 6 and the arterial infusion port 7 are hollow frustum-shaped structures. Both the venous infusion port 6 and the arterial infusion port 7 are provided with elliptical puncture incisions 8 at their upper ends. A rubber diaphragm 9 is installed on the inner side of the elliptical puncture incision 8. The rubber diaphragm 9 can dynamically block the elliptical puncture incision 8 without affecting the insertion of the puncture needle into the venous infusion port 6 or the arterial infusion port 7, and connect to the artificial blood vessel 5 on the venous vessel 3 or the arterial vessel 4 via a connecting tube.

[0034] The venous infusion port 6 and the arterial infusion port 7 are all integrally and fixedly connected to the artificial blood vessel 5 with a connecting seat 10. The connecting seat 10 facilitates the establishment of a pipeline connection between the venous infusion port 6 and the arterial infusion port 7 and the artificial blood vessel 5, so that the artificial blood vessel 5 and the venous infusion port 6 or the arterial infusion port 7 can form a stable infusion or puncture pipeline.

[0035] Specifically, such as Figure 1-4 As shown, a supradermal puncture mound 201 is formed on the skin layer 2 above the venous port 6 and the arterial port 7 for determining the location of the venous port 6 and the arterial port 7 and guiding the puncture direction of the puncture needle. Medical personnel can perform the positioning operation of the venous port 6 and the arterial port 7 by observing or touching the supradermal puncture mound 201 on the skin layer 2. At the same time, since the puncture part of the supradermal puncture mound 201 covers the elliptical puncture bevel 8 and the rubber diaphragm 9, when the puncture needle is inserted through the bevel part of the supradermal puncture mound 201, the puncture needle can pass through the skin layer 2 and the rubber diaphragm 9 into the venous port 6 or the arterial port 7, realizing the immediate connection operation between the puncture needle and the artificial blood vessel 5.

[0036] Example 2

[0037] Please see Figure 3 and Figure 4 The following differences exist between this and the tube connection device for a wearable artificial blood vessel in Embodiment 1: the artificial blood vessel 5 has a segmented structure, and both segments of the artificial blood vessel 5 are located between the subcutaneous tissue layer 1 and the skin layer 2, and are respectively connected to the vein 3 and the artery 4. In this combination structure of the artificial blood vessel 5 with the venous infusion port 6 and the arterial infusion port 7, the tubing connection between the venous blood vessel 3 and the artery 4 is independent of each other, and it is suitable for injecting or drawing / changing blood in the venous blood vessel 3 and the artery 4 separately, without causing mutual interference between the tubing of the venous blood vessel 3 and the artery 4.

[0038] Working principle: In use, according to the actual injection or hemodialysis needs, the tubing connection device in Example 1 or Example 2 is used to establish connections between the artificial blood vessel 5 and the vein 3 and artery 4 respectively. Then, it is embedded between the subcutaneous tissue layer 1 and the skin layer 2. During actual injection or hemodialysis, medical personnel can determine the position of the venous infusion port 6 and the arterial infusion port 7 under the skin layer 2 by observing or touching the subcutaneous puncture mound 201 on the skin layer 2. At the same time, the puncture bevel of the subcutaneous puncture mound 201 corresponds to the position of the elliptical puncture bevel 8 and the rubber diaphragm 9 on the venous infusion port 6 or the arterial infusion port 7. When the puncture point is inserted along the puncture bevel, the puncture needle can pass through the skin layer 2 and the rubber diaphragm 9 into the venous infusion port 6 or the arterial infusion port 7, and connect with the artificial blood vessel 5 for immediate tubing connection.

[0039] Compared to a standalone artificial blood vessel structure, it has the following advantages.

[0040] First, the instant wear feature

[0041] 1. Advantages of Early Use: Traditional artificial blood vessels typically require several weeks to allow for full healing and maturation between the vessel and surrounding tissue before puncture and use, generally a waiting period of 4-6 weeks. However, the improved "instant-access" artificial blood vessel's connecting device allows for puncture shortly after implantation, such as within 1-2 days. This significantly shortens the waiting time for patients to begin dialysis treatment, enabling timely fulfillment of treatment needs for patients requiring urgent dialysis and preventing delays in their condition due to waiting.

[0042] 2. Simplified Puncture Preparation: Before traditional artificial blood vessel puncture, medical staff need to spend a lot of time assessing the maturity of the blood vessel and finding a suitable puncture point, which is a relatively complicated process. The improved "ready-to-use" artificial blood vessel, with its unique connection device design and optimized blood vessel materials and structure, makes the puncture point easy to locate and identify, reducing the difficulty and time of pre-puncture assessment and improving puncture efficiency.

[0043] Second, the puncture experience has been optimized.

[0044] 1. Reduce pain: The improved artificial blood vessel's conduit connection device uses a smoother internal channel design and soft, human-tissue-friendly materials, reducing friction and irritation to the blood vessel wall during puncture.

[0045] 2. Reduced Puncture Difficulty: Traditional artificial blood vessel puncture requires a high level of skill from medical personnel, resulting in a relatively high failure rate. The improved "instant-access" artificial blood vessel, through an innovative design of the connecting device, makes the projection of the blood vessel on the body surface clearer and the blood vessel direction easier to grasp. At the same time, its material and structure make the puncture needle enter the blood vessel more smoothly, significantly reducing the difficulty of puncture and lowering the failure rate compared to traditional artificial blood vessels.

[0046] Third, flexibility of use

[0047] 1. Multi-angle adjustment: After traditional artificial blood vessel connection, the dialysis tubing position is relatively fixed, which can restrict the patient's movement during dialysis. The improved connection device has rotation and multi-angle adjustment functions, allowing the dialysis tubing to be flexibly adjusted within a certain angle range. This allows the patient to change positions more freely, improving the patient's comfort and ease of movement during dialysis.

[0048] 2. Adaptable to Different Body Positions: The improved connector is designed with an irregular oval shape that better fits the chest wall, taking into account the subcutaneous muscle texture and skeletal structure of the chest. This not only reduces pressure on surrounding tissues after implantation but also makes the connector more stable under the skin, lowering the risk of displacement due to daily activities and offering greater flexibility. Patients can choose more comfortable positions during dialysis, such as semi-recumbent or lateral decubitus positions, whereas traditional artificial blood vessel connections may only be suitable for certain specific positions. This innovation provides patients with more positional options during dialysis, improving their overall dialysis experience.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A conduit connection device for a perforated artificial blood vessel, comprising a subcutaneous tissue layer (1), a skin layer (2) above the subcutaneous tissue layer (1), a venous vessel (3) and an arterial vessel (4) disposed between the subcutaneous tissue layer (1) and the skin layer (2), and an artificial blood vessel (5) established between the venous vessel (3) and the arterial vessel (4), characterized in that, The artificial blood vessel (5) is provided with an infusion port structure that establishes a conduit connection with the venous blood vessel (3) or the arterial blood vessel (4).

2. The tube connection device for a perforated artificial blood vessel according to claim 1, characterized in that, The artificial blood vessel (5) is an integral structure, and the artificial blood vessel (5) is distributed in a U-shape between the subcutaneous tissue layer (1) and the skin layer (2), and is connected between the vein (3) and the artery (4).

3. The conduit connection device for a perforated artificial blood vessel according to claim 1 or 2, characterized in that, The artificial blood vessel (5) has a segmented structure, and both segments of the artificial blood vessel (5) are located between the subcutaneous tissue layer (1) and the skin layer (2), and are connected to the vein (3) and the artery (4) respectively.

4. The conduit connection device for a perforated artificial blood vessel according to claim 1, characterized in that, The infusion port structure includes a venous infusion port (6) connected to the end of the artificial blood vessel (5) near the venous vessel (3) and an arterial infusion port (7) connected to the end of the artificial blood vessel (5) near the arterial vessel (4).

5. The conduit connection device for a perforated artificial blood vessel according to claim 4, characterized in that, Both the venous infusion port (6) and the arterial infusion port (7) are hollow frustum-shaped structures. Both the venous infusion port (6) and the arterial infusion port (7) have elliptical puncture incisions (8) that are inclined at their upper ends. A rubber diaphragm (9) is installed on the inner side of the elliptical puncture incision (8).

6. The conduit connection device for a perforated artificial blood vessel according to claim 5, characterized in that, The venous infusion port (6) and the arterial infusion port (7) are all integrally and fixedly connected to the artificial blood vessel (5) with a connecting seat (10).

7. The conduit connection device for a perforated artificial blood vessel according to claim 4, characterized in that, On the skin layer (2), above the venous infusion port (6) and the arterial infusion port (7), there is a subcutaneous puncture mound (201) for determining the location of the venous infusion port (6) and the arterial infusion port (7) and for guiding the puncture direction of the puncture needle.

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