A peripheral vascular catheter assembly for hemodialysis

Abstract

The present invention relates to a peripheral vascular catheter assembly for hemodialysis, which comprises two connecting tubes; the inner ends of the connecting tubes are used to communicate with the peripheral blood vessels of the patient, one of the blood vessels connected by the two connecting tubes is an arterial blood vessel and the other is a venous blood vessel; the outer ends of the connecting tubes are respectively provided with joints for connecting with a dialysis device outside the patient's body, and the joints of the two connecting tubes are mutually adapted and can be combined to form a passage. The peripheral vascular catheter assembly for hemodialysis can reduce the pain of puncture for patients during hemodialysis and avoid hemodialysis bringing additional hidden dangers to the health of patients.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to a peripheral vascular catheter assembly for hemodialysis. Background Art

[0002] Hemodialysis (HD) is one of the renal replacement therapies for patients with acute and chronic renal failure. It drains blood from the body to the outside of the body, purifies it through a dialyzer, and then returns the purified blood to the body.

[0003] Arteriovenous fistulas and semi-permanent central venous catheters are widely used in hemodialysis. Among them, arteriovenous fistulas are suitable for patients with good peripheral vascular conditions. However, during the application process, the fistula may be blocked due to the patient's low blood pressure, pressure, diarrhea, etc., affecting the progress of hemodialysis. At present, for patients with poor peripheral blood vessels, artificial blood vessels can be anastomosed to the brachial artery in the elbow and the vein in the elbow for hemodialysis. In the above two methods, puncture is required every time hemodialysis is performed, which causes great pain to the patient and may also cause complications such as pseudoaneurysms.

[0004] Hemodialysis through a semi-permanent central venous catheter can avoid the pain of puncture for each hemodialysis. However, the central venous sheath formed by the semi-permanent central venous catheter may cause insufficient blood flow and affect the progress of hemodialysis. At the same time, the central venous catheter is also prone to cause thrombosis in the catheter, bringing additional risks to the patient's health.

[0005] Therefore, how to reduce the pain of puncture during hemodialysis and avoid additional hidden dangers to the health of patients caused by hemodialysis is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] The purpose of the present invention is to provide a peripheral vascular catheter assembly for hemodialysis, which can reduce the pain of puncture for patients during hemodialysis and avoid additional hidden dangers to the health of patients caused by hemodialysis.

[0007] In order to solve the above technical problems, the present invention provides a peripheral vascular catheter assembly for hemodialysis, which includes two connecting tubes; the inner ends of the connecting tubes are used to communicate with the patient's peripheral blood vessels, and the blood vessels connected by the two connecting tubes are one arterial blood vessel and the other a venous blood vessel; the outer ends of the connecting tubes are respectively provided with connectors for connecting to the dialysis equipment outside the patient's body, and the connectors of the two connecting tubes are adapted to each other and can be combined to form a passage.

[0008] Specifically, for patients who need hemodialysis, the inner ends of the two connecting tubes are connected to the arterial blood vessels and the venous blood vessels respectively (can be anastomosed by continuous eversion suturing), and the outer ends of the two connecting tubes can pass through the patient's skin and be located outside the human body. When performing hemodialysis, the joint of the connecting tube connected to the arterial blood vessels is connected to the blood inlet of the dialysis device, and the joint of the connecting tube connected to the venous blood vessels is connected to the blood outlet of the dialysis device. At this time, the blood in the arterial blood vessels can enter the dialysis device along the connecting tubes, and the dialysis device purifies the incoming blood and then inputs it into the human body through the connecting tube connected to the venous blood vessels to achieve dialysis. When the dialysis is completed, the joint of the connecting tube can be disconnected from the dialysis device and the joints of the two connecting tubes can be connected to form a passage outside the patient's body, which can prevent blood from flowing out and will not affect the blood circulation in the patient's body. The blood can also continue to circulate in the passage formed outside the patient's body without the need for heparin sealing.

[0009] When performing hemodialysis again, the two connectors can be separated and reconnected to the blood inlet and blood outlet of the dialysis device without puncturing the patient, thus reducing the patient's pain.

[0010] Moreover, the peripheral vascular catheter assembly for hemodialysis is applicable to the patient's peripheral blood vessels. Specifically, it is only necessary to connect the inner ends of the two connecting tubes to the venous blood vessels and the arterial blood vessels respectively. Even for patients with poor vascular conditions, as long as the patient has a certain section of blood vessels that can be used to connect to the connecting tubes, it has good applicability.

[0011] In addition, when the peripheral vascular catheter assembly is in use, since the two connecting tubes are not connected and the corresponding arterial and venous blood vessels are not anastomosed, blood recirculation can be avoided during hemodialysis, that is, when the blood purified by the dialysis device returns to the body, part of it is sucked back to the dialysis device by the arterial outlet, thereby ensuring that the blood can be fully dialyzed. Moreover, compared with the solution of hemodialysis through a semi-permanent central venous catheter, hemodialysis through the peripheral vascular catheter assembly will not bring additional risks to the patient's health.

[0012] Optionally, the connecting tube includes an inner connecting section, a fixed section and an outer connecting section which are connected in sequence, the inner connecting section is connected to the blood vessel, the outer connecting section is provided with the connector, the fixed section is partially located in the subcutaneous tissue of the patient and partially located outside the body of the patient, and the outer walls of the fixed sections of the two connecting tubes are fixed.

[0013] Optionally, a protective layer is also fixedly provided on the outer wall of the fixed section, and the protective layer includes artificial skin and / or a polyester cover.

[0014] Optionally, it further comprises a sleeve, wherein a partition wall is provided inside the sleeve along its length direction, wherein the partition wall divides the inside of the sleeve into two independent channels, and the sleeve forms a fixed section of the two connecting pipes.

[0015] Optionally, two hemostatic clips are further included, which are respectively arranged on the outer connecting sections of the two connecting tubes.

[0016] Optionally, the inner connecting section includes a three-way structure formed by a connecting tube and an outlet tube, the connecting tube is connected between the two broken ends of the blood vessel, the inner end of the outlet tube is connected to the side wall of the connecting tube, and the outer end of the outlet tube is connected to the fixed section.

[0017] Optionally, the inner connecting section is an artificial blood vessel.

[0018] Optionally, a plug connector is provided between the lead-out pipe and the fixed section, and the inner plug end of the plug connector and the lead-out pipe as well as the outer plug end of the plug connector and the fixed section are fixed by plug-in and fixing parts, and the fixing parts are binding wires or clamps.

[0019] Optionally, a vascular stent is further included for supporting the inner wall of the blood vessel. The side wall of the vascular stent is also provided with a sealing portion, which can be tightly attached to the inner wall of the blood vessel, and the sealing portion is provided with an extension tube that can pass through the blood vessel wall, and the extension tube is connected to the inner end of the connecting tube.

[0020] Optionally, a groove is provided at the outer end of the extension tube along the circumferential direction, and the inner end of the connecting tube is sleeved on the outer wall of the extension tube and fixed by a tie wire tied to the groove.

[0021] Optionally, the inner connecting section and the fixing section are an integrated structure; the vascular stent, the sealing portion and the extension tube are an integrated structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of a peripheral vascular catheter assembly for hemodialysis provided by an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A cross-sectional view of the middle casing;

[0024] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle plug connector;

[0025] Figure 4 is a schematic structural diagram of another peripheral vascular catheter assembly for hemodialysis provided by an embodiment of the present invention;

[0026] Figure 5 yes Figure 4 A partial enlarged view of the

[0027] Figure 6 yes Figure 5 Schematic diagram of the local structure.

[0028] Attached Figure 1-6 In the figure, the reference numerals are described as follows:

[0029] 1-connecting tube, 11-inner connecting section, 12-fixing section, 121-artificial skin, 122-polyester sleeve, 13-outer connecting section, 131-connector;

[0030] 2-plug connector, 21-inner plug end, 22-outer plug end;

[0031] 3-Hemostatic clip;

[0032] 4- three-way structure, 41- connecting pipe, 42- outlet pipe;

[0033] 5-vascular stent, 51-sealing part, 52-extension tube, 53-groove;

[0034] 6-blood vessels, 61-severed ends;

[0035] 7- casing, 71- partition wall, 72- channel. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Please refer to Figure 1-6 , Figure 1 Schematic diagram of the structure of a peripheral vascular catheter assembly for hemodialysis provided by an embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of the middle casing; Figure 3 yes Figure 1 A schematic diagram of the structure of the middle plug connector; Figure 4 is a schematic structural diagram of another peripheral vascular catheter assembly for hemodialysis provided by an embodiment of the present invention; Figure 5 yes Figure 4 A partial enlarged view of the Figure 6 yes Figure 5 Schematic diagram of the local structure.

[0038] The embodiment of the present invention provides a peripheral vascular catheter assembly for hemodialysis, such as Figure 1 and Figure 4As shown, the peripheral vascular catheter assembly for hemodialysis includes two connecting tubes 1, each of which can pass through the patient's skin and connect between the patient's peripheral blood vessels 6 and the dialysis equipment. Specifically, the connecting tube 1 includes an inner end and an outer end (in this application document, the inner end refers to the end facing the blood vessel 6, and the outer end refers to the end facing the dialysis equipment). Among the blood vessels 6 connected by the two connecting tubes 1, one is an arterial blood vessel and the other is a venous blood vessel. The outer end of the connecting tube 1 is provided with a connector 131, which is located outside the patient's body and is used to connect to the dialysis equipment, and the connectors 131 of the two connecting tubes 1 are adapted to each other and can be combined to form a passage.

[0039] That is, the inner end of one connecting tube 1 is connected to the patient's arterial blood vessel, and the outer end can be connected to the blood inlet of the dialysis device; the inner end of another connecting tube 1 is connected to the patient's venous blood vessel, and the outer end can be connected to the blood outlet of the dialysis device.

[0040] Specifically, for patients who need hemodialysis, the inner ends of the two connecting tubes 1 are connected to the arterial blood vessels and the venous blood vessels respectively, and the outer ends of the two connecting tubes 1 can pass through the patient's skin and be located outside the human body. When performing hemodialysis, the connector 131 of the connecting tube 1 connected to the arterial blood vessels is connected to the blood inlet of the dialysis device, and the connector 131 of the connecting tube 1 connected to the venous blood vessels is connected to the blood outlet of the dialysis device. At this time, the blood in the arterial blood vessels can enter the dialysis device along the connecting tube 1. The dialysis device purifies the incoming blood and then inputs it into the human body through the connecting tube 1 connected to the venous blood vessels to achieve dialysis. After the dialysis is completed, the connector 131 of the connecting tube 1 can be disconnected from the dialysis device and the connectors 131 of the two connecting tubes 1 can be connected to form a passage outside the patient's body, which can prevent blood from flowing out and will not affect the blood circulation in the patient's body. The blood can also continue to circulate in the passage formed outside the patient's body without the need for heparin sealing.

[0041] When performing hemodialysis again, the two connectors 131 can be separated and reconnected to the blood inlet and blood outlet of the dialysis device without puncturing the patient, thus reducing the patient's pain.

[0042] Furthermore, the peripheral vascular catheter assembly for hemodialysis provided in this embodiment is applicable to the patient's peripheral blood vessels 6. Specifically, it is only necessary to connect the inner ends of the two connecting tubes 1 to the venous blood vessels and the arterial blood vessels respectively. Even for patients with poor conditions of the blood vessels 6, as long as the patient has a section of the blood vessel 6 that can be used to connect to the connecting tube 1, it has good applicability.

[0043] In addition, when the peripheral vascular catheter assembly is in use, since the two connecting tubes 1 are not connected and the corresponding arterial and venous blood vessels are not anastomosed, blood recirculation can be avoided during hemodialysis, that is, when the blood purified by the dialysis device returns to the body, part of it is reabsorbed back into the dialyzer by the arterial outlet, thereby ensuring that the blood can be fully dialyzed. Moreover, compared with the solution of hemodialysis through a semi-permanent central venous catheter, hemodialysis through the peripheral vascular catheter assembly will not bring additional hidden dangers to the patient's health.

[0044] In the above embodiment, the connecting tube 1 includes an inner connecting section 11, a fixing section 12 and an outer connecting section 13 which are sequentially connected and arranged, wherein the inner connecting section 11 is connected to the patient's blood vessel 6, the outer connecting section 13 is provided with the above-mentioned joint 131, and the fixing section 12 is partially located in the patient's subcutaneous tissue and connected to the inner connecting section 11, and partially located outside the patient's body and connected to the outer connecting section 13. The outer walls of the fixing sections 12 of the two connecting tubes 1 are fixed, so that the two connecting tubes 1 are led out from the same position of the human body, that is, the human body only needs to be provided with one opening, so that the overall structure of the peripheral vascular catheter assembly can be regularized, the number of openings on the patient's skin can be reduced, and the connection between the peripheral vascular catheter assembly and the patient's body is convenient.

[0045] In the above embodiment, the outer wall of the fixing section 12 is also provided with a protective layer, which includes an artificial skin 121 and / or a polyester cover 122, wherein the artificial skin 121 is used to fuse with the patient's skin, and the polyester cover 122 is used to fuse with the patient's subcutaneous tissue. Specifically, the protective layer may be provided with only the artificial skin 121, or only the polyester cover 122, or both the artificial skin 121 and the polyester cover 122, so as to prevent the fixing section 12 from penetrating the human skin and entering the body due to retrograde bacteria, thereby ensuring the safety of the patient.

[0046] In this embodiment, the fixing sections 12 of the two connecting pipes 1 are an integrated structure, which is specifically formed by a sleeve 7 having a partition wall 71 inside. Specifically, the partition wall 71 is arranged along the length direction inside the sleeve 7, such as Figure 2 As shown, the partition wall 71 divides the space in the sleeve 7 into two independent channels 72, thereby forming the fixing sections 12 of the two connecting pipes 1. Alternatively, in this embodiment, the fixing sections 12 of the two connecting pipes 1 can also be set as a split structure and fixed by bonding, sewing, etc., while the integrated structure can make the overall structure more regular and simplify the assembly operation of the overall structure.

[0047] Specifically, the material of the fixing section 12 (sleeve 7) can be a biological material such as silicone, polyurethane or polysiloxane, which can ensure that the catheter has a certain hardness outside the body, is relatively soft inside the subcutaneous tissue, and has good biocompatibility. There is no requirement for the material of the external connecting section 13 of the connecting tube 1, and it can be set to TPE (polyolefin thermoplastic elastomer) or the like.

[0048] In the above embodiment, the peripheral vascular catheter assembly also includes two hemostatic clamps 3, which are respectively arranged on the outer connection sections 13 of the two connecting tubes 1. Specifically, after the dialysis is completed, the hemostatic clamps 3 can be temporarily applied to the connecting tubes 1 to prevent the blood in the connecting tubes 1 from flowing out, and then the connection between the connector 131 and the dialysis device is released, and the two connectors 131 are docked, and then the action of the hemostatic clamps 3 on the connecting tubes 1 is removed so that the two connecting tubes 1 form a passage between the arterial blood vessels and the venous blood vessels. The provision of the hemostatic clamps 3 facilitates the connection of the connectors 131 of the two connecting tubes 1 after the dialysis is completed, avoiding the loss of blood during the process.

[0049] In the above embodiment, if Figure 1 As shown, the internal connecting section 11 includes a three-way structure 4 formed by a connecting tube 41 and an outlet tube 42, wherein the connecting tube 41 is connected between the two broken ends 61 of the peripheral blood vessel 6, the inner end of the outlet tube 42 is connected to the side wall of the connecting tube 41, and the outer end of the outlet tube 42 is connected to the fixed section 12.

[0050] Specifically, the blood vessel 6 is cut into two broken ends 61, and the two ends of the connecting tube 1 are respectively sutured to the two broken ends 61 to re-form the blood vessel 6 passage. This technology is currently achievable for those skilled in the art. Alternatively, in this embodiment, the inner end of the connecting tube 1 can also be connected to the blood vessel 6 end to end, and the setting of the three-way structure 4 does not affect the blood circulation of the original blood vessel 6 when hemodialysis is not performed.

[0051] Furthermore, the inner connecting section 11 is an artificial blood vessel. Specifically, the artificial blood vessel can be any existing artificial blood vessel on the market. The artificial blood vessel can better fit with the human blood vessel 6 to avoid rejection and will not bring new health risks to the human body.

[0052] Furthermore, Figure 1 and 3As shown, a plug connector 2 is also provided between the outlet pipe 42 and the fixed section 12. The connection between the inner plug end 21 of the plug connector 2 and the outlet pipe 42 and the connection between the outer plug end 22 of the plug connector 2 and the fixed section 12 are both fixed by plugging and fixing parts. Specifically, the fixing parts can be binding wires or clamps. That is to say, after the plug connection, the two are further fixed at the plug-in position by fixing parts such as binding wires or clamps to ensure the connection stability and sealing between the two. Alternatively, in this embodiment, the connection between the outlet pipe 42 and the fixed section 12 can also be achieved by suturing, and plug-in fixing does not require suturing operations between different materials, and the connection between the inner connection section 11 and the fixed section 12 can be easily and quickly achieved.

[0053] Specifically, in this embodiment, the plug connector 2 can be made of a material with good biocompatibility such as silicone, and the two plug connectors 2 can be fixed to each other or can be separate structures. In addition, there is no limitation on the specific structure of the plug connector 2. For example, it can be made according to the inner diameter of the artificial blood vessel and the inner diameter of the fixed segment 12, and inserted into the artificial blood vessel and the fixed segment 12 for a certain length (such as about 1 cm) and fixed by a binding wire or a clamp.

[0054] In detail, the surgeon finds a suitable arterial segment by color Doppler ultrasound or by touching before the operation. After the arterial segment is cut to a certain length to form two broken ends 61, the connecting tube 41 of the three-way structure 4 is connected between the two broken ends 61 (can be sutured by continuous eversion). At this time, the outlet tube 42 of the three-way structure 4 connected to the arterial vessel is in a free state; in the same way, the two ends of the connecting tube 41 of the other connecting tube 1 are connected between the two broken ends 61 of the appropriate venous vessel, so that the outlet tube 42 is in a free state; at this time, the in vitro position length of the fixed segment 12 is selected (the specific length can be adjusted according to the actual situation). The situation is set), a tunnel is opened from the skin and subcutaneous tissue at the proximal end to the distal end, and the fixed section 12 is inserted into the skin and subcutaneous tissue along the tunnel to the lead-out tube 42. After the two free lead-out tubes 42 are cut to the required length, they are fixed to the fixed section 12 through the plug connector 2. Since the outer walls of the two fixed sections 12 are fixed, the two fixed sections 12 can be led out from the same position of the patient's body. The protective layer provided on the outer wall of the fixed section 12 can be integrated with the patient's skin or subcutaneous tissue, and outside the patient's body, the two fixed sections 12 are respectively connected to two external connection sections 13 provided with connectors 131. When performing hemodialysis, the connector 131 of the external connection section 13 is connected to the dialysis equipment. After the dialysis is completed, the connectors 131 of the two external connection sections 13 are combined to form a passage outside the patient's body.

[0055] The peripheral vascular catheter assembly for hemodialysis has a simple structure, can save patients from the pain of multiple punctures, and will not bring additional hidden dangers to the health of patients.

[0056] In this embodiment, another solution for connecting the connecting tube 1 to the peripheral blood vessel 6 is provided. Specifically, Figure 4-6 As shown, the peripheral vascular catheter assembly includes a vascular stent 5 for supporting the inner wall of the blood vessel 6. The side wall of the vascular stent 5 is also provided with a sealing portion 51. The sealing portion 51 can be closely attached to the inner wall of the blood vessel 6, and the sealing portion 51 is provided with an extension tube 52 that can penetrate the blood vessel wall, and the extension tube 52 is connected with the inner end of the connecting tube 1. Specifically, the vascular stent 5 is a mesh structure, and the sealing portion 51 is a connecting surface provided in the vascular stent 5 of the mesh structure. The outer wall of the connecting surface is attached to the inner wall of the blood vessel 6 to form a seal between the two. At the same time, the connecting surface is provided with a connecting hole, and the outer wall of the connecting hole extends outward to form the above-mentioned extension tube 52. That is to say, after the extension tube 52 is connected to the connecting tube 1, blood can flow between the blood vessel 6 and the connecting tube 1 through the extension tube 52. This structural setting does not affect the blood circulation of the original blood vessel 6 when hemodialysis is not performed.

[0057] The mesh structure of the vascular stent 5 is convenient for placement in the blood vessel 6 and expansion to support the blood vessel 6. It can also act on the connection surface to fit the inner wall of the blood vessel 6 to achieve a seal between the two, thereby avoiding bleeding from the position where the extension tube 52 passes through the blood vessel wall.

[0058] Furthermore, a groove 53 is circumferentially provided at the outer end of the extension tube 52 (the end located outside the blood vessel 6), and the inner end of the connecting tube 1 is sleeved on the outer wall of the extension tube 52 and fixed by a binding wire, which is tied at the groove 53 to make the connection between the extension tube 52 and the connecting tube 1 more stable.

[0059] Specifically, in this embodiment, the binding wire used to bind the lead-out tube 42 and the plug connector 2 and the binding wire used to bind the extension tube 52 and the inner end of the connecting tube 1 can be surgical sutures, etc., and no specific restrictions are made here.

[0060] Furthermore, the inner connecting section 11 and the fixed section 12 may be an integrated structure of the pipeline, in which the fixed section 12 is fixed to the fixed section 12 of another connecting tube 1, and the inner connecting section 11 is separated from the inner connecting section 11 of another connecting tube 1. At the same time, the vascular stent 5, the sealing portion 51 and the extension tube 52 are also integrated structures, so that the installation operation of the overall structure can be simplified and the connection is more stable.

[0061] Specifically, the surgeon finds a suitable arterial segment by color Doppler ultrasound or by touching before the operation. During the operation, the surgeon checks again whether the arterial segment found before the operation is suitable for inserting the vascular stent 5. The two ends of the arterial segment are clamped with vascular clamps, and the clamped blood vessel 6 is slightly expanded with normal saline to check whether the elasticity of the blood vessel 6 meets the requirements. If it meets the requirements, the vascular stent 5 can be inserted. The operation of inserting the stent into the vein is the same as the operation of inserting the vascular stent 5 into the artery, which will not be repeated here.

[0062] Before placing the vascular stent 5 into the blood vessel 6 (arterial vessel or venous vessel), the inner end of the fixing section 12 is first freed in the subcutaneous tunnel for a distance (such as 8-10 cm) to the surgical incision, and the inner connecting section 11 of the connecting tube 1 is cut to the required length. Then, the above operation is followed to make an incision at the distal end of the clamped blood vessel 6 so that the stent can be inserted and the vascular stent 5 is placed toward the proximal end. The extension tube 52 of the vascular stent 5 is placed toward one side of the connecting tube 1. At this time, the extension tube 52 can lift the blood vessel wall. The incision here allows the extension tube 52 to pass out of the blood vessel wall. Since the sealing portion 51 can be close to the inner wall of the blood vessel 6 to form a seal between the two, after the incision, the incision of the blood vessel wall is sealed by the sealing portion 51, and no bleeding will occur. The inner end of the connecting tube 1 is sleeved on the outer side of the extension tube 52 and fixed by binding wire. Finally, the incision where the vascular stent 5 is placed is sutured, the blood vessel clamp is loosened to check that there is no bleeding, and the skin suture operation is completed.

[0063] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A peripheral vascular catheter assembly for hemodialysis, characterized in that: It comprises two connecting pipes (1); The inner end of the connecting tube (1) is used to communicate with a peripheral blood vessel (6) of a patient, and one of the blood vessels (6) connected by the two connecting tubes (1) is an arterial blood vessel and the other is a venous blood vessel; The outer end of each connecting tube (1) is provided with a connector (131) for connecting to a dialysis device outside the patient's body, and the connectors (131) of the two connecting tubes (1) are adapted to fit each other and can be combined to form a passage; The connecting tube (1) comprises an inner connecting section (11), a fixing section (12) and an outer connecting section (13) which are connected in sequence, the inner connecting section (11) being connected to the blood vessel (6), and the outer connecting section (13) being provided with the joint (131); It also includes two hemostatic clips (3), which are respectively arranged on the outer connecting sections (13) of the two connecting tubes (1); The fixing section (12) is partially located in the subcutaneous tissue of the patient and partially located outside the patient's body, and the outer walls of the fixing sections (12) of the two connecting tubes (1) are fixed; It also comprises a sleeve (7), wherein a partition wall (71) is provided inside the sleeve (7) along its length direction, wherein the partition wall (71) divides the inside of the sleeve (7) into two independent channels (72), and the sleeve (7) forms a fixed section (12) of two connecting pipes (1); The outer wall of the fixed section (12) is also provided with a protective layer, the protective layer comprising artificial skin (121) and / or a polyester cover (122); It also comprises a blood vessel support (5) for supporting the inner wall of the blood vessel (6); the side wall of the blood vessel support (5) is further provided with a sealing portion (51); the sealing portion (51) is capable of closely contacting the inner wall of the blood vessel (6); and the sealing portion (51) is provided with an extension tube (52) capable of passing through the blood vessel wall; the extension tube (52) is in communication with the inner end of the connecting tube (1).

2. The peripheral vascular catheter assembly for hemodialysis according to claim 1, characterized in that: The material of the fixing section (12) is silicone, polyurethane or polysiloxane.

3. The peripheral vascular catheter assembly for hemodialysis according to claim 1 or 2, characterized in that: The inner connecting section (11) comprises a three-way structure (4) formed by a connecting tube (41) and an outlet tube (42), wherein the connecting tube (41) is connected between two broken ends (61) of the blood vessel (6), the inner end of the outlet tube (42) is connected to a side wall of the connecting tube (41), and the outer end of the outlet tube (42) is connected to the fixed section (12).

4. The peripheral vascular catheter assembly for hemodialysis according to claim 3, characterized in that: The inner connecting section (11) is an artificial blood vessel.

5. The peripheral vascular catheter assembly for hemodialysis according to claim 4, characterized in that: A plug connector (2) is also provided between the outlet pipe (42) and the fixed section (12); the inner plug end (21) of the plug connector (2) and the outlet pipe (42) as well as the outer plug end (22) of the plug connector (2) and the fixed section (12) are fixed by plugging and fixing parts, wherein the fixing parts are binding wires or clamps.

6. The peripheral vascular catheter assembly for hemodialysis according to claim 1, characterized in that: The outer end of the extension tube (52) is provided with a groove (53) along the circumferential direction, and the inner end of the connecting tube (1) is sleeved on the outer wall of the extension tube (52) and fixed by a binding wire bound in the groove (53).

7. The peripheral vascular catheter assembly for hemodialysis according to claim 1, characterized in that: The inner connecting section (11) and the fixing section (12) are an integrated structure; the blood vessel stent (5), the sealing portion (51) and the extension tube (52) are an integrated structure.

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