Implantable dialysis port

Abstract

An implantable dialysis port comprises a port body, the port body is internally provided with a vein cavity and an artery cavity which are independent of each other, the artery cavity is provided with a first outlet and a first inlet, the vein cavity is provided with a second inlet and a second outlet, and the first outlet and the second inlet are located in the top of the port body and are sealed by sealing pieces respectively; a first magnet and a second magnet which are arranged in a central symmetry mode are arranged in the harbor body, and the first magnet and the second magnet are opposite in magnetism. The positioning cover can cover the periphery of the port body and is provided with a first puncture hole and a second puncture hole, and when the positioning cover covers the periphery of the port body, the first outlet is located below the first puncture hole, and the second inlet is located below the second puncture hole; a third magnet corresponding to the first magnet and a fourth magnet corresponding to the second magnet are arranged in the positioning cover, the magnetism of the third magnet is opposite to that of the first magnet, and the magnetism of the fourth magnet is opposite to that of the second magnet. A puncture opening can be accurately positioned through the positioning cover, and the puncture success rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to an implantable dialysis port for hemodialysis. BACKGROUND

[0002] Hemodialysis is the main mode of kidney replacement therapy for end-stage renal disease. Hemodialysis is to lead the blood of the patient out of the body to remove the excess water and metabolic waste in the blood through a dialyzer, and then to return the purified blood to the body, so as to realize blood purification treatment. Establishing a vascular access is the basis of hemodialysis treatment. The most commonly used hemodialysis access at present includes a central venous catheter and an arteriovenous fistula. The vascular end of the central venous catheter is inserted into the central vein of the human body through surgery, and the arteriovenous puncture port is left outside the skin. Since the puncture port is left outside the body, it is easy to cause infection, and affects the daily life of the patient, bringing great inconvenience to the patient. The arteriovenous fistula is connected by anastomosing the artery and the superficial vein vessels close to each other through surgery. Since the arterial blood flow is high pressure, it will gradually stimulate the superficial vein wall to expand and thicken, which can meet the requirement of hemodialysis access. However, long-term frequent puncture or incorrect use, improper maintenance, etc. can easily lead to thrombosis, stenosis, hemangioma, etc. of the fistula, and the dialysis treatment cannot be continued through the fistula.

[0003] In recent years, a new type of hemodialysis access, implantable dialysis access, has appeared. The port body with an arteriovenous cavity is implanted subcutaneously, the port body is connected with a central venous dialysis catheter, and the other end of the central venous dialysis catheter is connected with a blood vessel to form an access. Since the port body of this implantable dialysis port is buried subcutaneously and not exposed, the risk of infection can be greatly avoided, and the appearance and daily life of the patient are not affected. Moreover, only a dynamic venous puncture needle is needed to penetrate the thin layer of skin to enter the dialysis diaphragm during treatment to form an access for dialysis treatment, and the operation is more simple. However, it is found in clinical application that since the port body of this implantable dialysis port is completely buried subcutaneously, the requirement for the operator is very high during puncture. If the operator is not skilled, it is difficult to accurately identify and position the puncture port subcutaneously, the puncture success rate is low, and repeated puncture will cause pain to the patient. Moreover, since the dialysis port has two cavities, the venous cavity and the arterial cavity, it is not easy to distinguish the arteriovenous puncture port during puncture. If the arteriovenous puncture port is mixed, the dialysis effect will be affected. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing an implantable dialysis port which can improve the puncture positioning accuracy.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The implantable dialysis port comprises a port body, a vein cavity and an artery cavity which are arranged in the port body and are independent of each other, the artery cavity is provided with a first outlet and a first inlet, the vein cavity is provided with a second inlet and a second outlet, the first outlet and the second inlet are located at the top of the port body and are sealed by sealing members respectively, the first magnet and the second magnet which are arranged in the port body are arranged in a central symmetry mode, and the magnetism of the first magnet and the second magnet is opposite, a positioning cover which can be covered on the periphery of the port body is arranged, the positioning cover is provided with a first puncture hole and a second puncture hole, when the positioning cover is covered on the periphery of the port body, the first outlet is located below the first puncture hole, and the second inlet is located below the second puncture hole, the third magnet which corresponds to the first magnet and the fourth magnet which corresponds to the second magnet are arranged in the positioning cover, the magnetism of the third magnet and the magnetism of the first magnet are opposite, and the magnetism of the fourth magnet and the magnetism of the second magnet are opposite.

[0007] In some embodiments, the first magnet and the artery cavity are arranged on the same side, and the second magnet and the vein cavity are arranged on the same side.

[0008] According to the above technical scheme, the positioning cover with the puncture hole is arranged, the positioning cover can be covered on the periphery of the port body, the positioning cover and the port body are respectively provided with the magnets with the specific attraction relationship, so that the positioning cover can be matched with the port body only in a specific direction, the puncture hole in the positioning cover can be used to accurately position the puncture hole of the artery and vein cavities in the port body, the puncture success rate is improved, the two cavities cannot be reversed, the positioning accuracy is improved, the puncture failure caused by the positioning deviation is avoided, the patient is not brought pain and unnecessary risk, the magnets enable the positioning cover and the port body to be stably matched together, the port body displacement is prevented, the stability of the port body during the treatment process is improved, and the treatment effect is better ensured.

[0009] In some embodiments, the dialysis catheter is a double-cavity tube, the tail end of the dialysis catheter is provided with an inlet hole and an outlet hole, the dialysis catheter is communicated with the artery cavity and the vein cavity through a Y-shaped connecting pipe, the Y-shaped connecting pipe has a branch section which is divided into two branch pipes and a main section which is integrated with the two branch pipes, the two branch pipes of the branch section are connected with the first inlet located at the bottom of the artery cavity and the second outlet located at the bottom of the vein cavity respectively, and the main section is connected with the dialysis catheter.

[0010] Further, the cross-sectional shape of the branch pipe is semicircular, the cross-sectional shape of the main section is circular, and / or the end of the dialysis catheter is provided with a conical frustum-shaped plug.

[0011] Further, the main section of the Y-shaped connecting pipe is connected with the dialysis catheter through a quick connecting short pipe, one end of the quick connecting short pipe is inserted into the main section and the other end is inserted into the dialysis catheter, and the outer wall of the quick connecting short pipe is tightly fitted with the inner wall of the main section and the dialysis catheter.

[0012] In view of the unstable connection between the dialysis catheter and the Y-shaped connecting pipe, the quick connecting short pipe is used to connect the dialysis catheter and the Y-shaped connecting pipe, which can reduce the risk of loosening of the dialysis catheter and the Y-shaped connecting pipe after long time use, and cause the connection failure between the dialysis port and the dialysis catheter. Moreover, the quick connecting short pipe is used for connection, which facilitates the pipeline connection, reduces the operation time and the pain of the patient, and improves the medical efficiency.

[0013] Further, the periphery of the connection between the dialysis catheter and the quick connecting short pipe is provided with a locking nut.

[0014] The locking nut is arranged at the connection between the dialysis catheter and the Y-shaped connecting pipe, which ensures the fastening of the connection, prevents loosening, improves the stability and reliability of the connection, and thus ensures the effect of dialysis and the safety of the patient.

[0015] Further, the positions of the liquid inlet hole and the liquid outlet hole on the dialysis catheter are staggered along the length direction of the dialysis catheter.

[0016] Further, the liquid inlet hole is closer to the port body than the liquid outlet hole.

[0017] In some embodiments, the periphery of the first outlet and the second inlet is respectively provided with a color mark with different colors.

[0018] In some embodiments, the port body is provided with a Y-shaped channel instead of the Y-shaped connecting pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structure schematic view when the positioning cover and the port body of the embodiment of the present application are separated;

[0021] Figure 2 The cross-sectional view when the positioning cover and the port body of the embodiment of the present application are assembled together;

[0022] Figure 3The sectional view of the positioning cover and the harbor body separated in the embodiment of the present utility model;

[0023] Figure 4 The structure schematic view of the harbor body in the embodiment of the present utility model;

[0024] Figure 5 The sectional view along Figure 4 A-A line;

[0025] Figure 6 The sectional view along Figure 5 B-B line;

[0026] Figure 7 The structure schematic view of the harbor body from another angle in the embodiment of the present utility model;

[0027] Figure 8 The sectional view along Figure 7 B-B line;

[0028] The specific embodiments of the present utility model will be further described in detail in combination with the accompanying drawings. Specific embodiments

[0029] The present utility model will be described in detail in combination with the accompanying drawings, and in the detailed description of the embodiments of the present utility model, the drawings showing the structure of the device will be partially enlarged without the general proportion, and the schematic view is only an example, which should not limit the scope of protection of the present utility model. It should be noted that the drawings are simplified and all use non-precise proportions, only to facilitate, clearly assist in explaining the purpose of the embodiments of the present utility model. At the same time, in the description of the present application, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the directions or position relationships indicated by the terms "positive", "negative", "bottom", "upper", "lower" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as limiting the present utility model.

[0030] In the description of the present utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements, which can be wireless connection, or wired connection. For ordinary skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0031] As shown in Figure 1 , Figure 2 and Figure 3 , the implantable dialysis port of the embodiment comprises a port body 1, a positioning cover 2 and a dialysis catheter 3. The port body 1 is implanted subcutaneously, and the inside of the port body 1 has two cavities isolated from each other and not connected to each other: an arterial cavity 1a and a venous cavity 1b. Among them, the arterial cavity 1a is a buffer cavity for blood drawn from the blood vessel during dialysis treatment, and the venous cavity 1b is a buffer cavity for the purified blood to be reinfused into the human body.

[0032] The upper ends of the arterial cavity 1a and the venous cavity 1b are open and sealed by a silicone diaphragm 4 arranged at the top of the arterial cavity 1a and the venous cavity 1b. The silicone diaphragm 4 serves as a sealing member and can be a medical-grade silicone diaphragm. A no-loss puncture needle can puncture the silicone diaphragm 4 and be aseptically connected to the cavity below to form a passage, thereby achieving the connection of the human body blood from the dialysis port to the dialysis equipment or the connection of the dialysis blood treated by the dialysis equipment to the human body through the dialysis port.

[0033] The open end of the top of the arterial cavity 1a of the embodiment forms a first outlet, which is an arterial puncture port. The bottom of the arterial cavity 1a is provided with a first inlet, and the silicone diaphragm 4 covers the first outlet of the arterial cavity 1a to form a seal for the arterial cavity 1a. The first outlet is used to communicate with the dialysis equipment to allow the human body blood to enter the dialysis equipment through the dialysis port. The first inlet is used to aseptically communicate with the dialysis catheter 3. After the no-loss puncture needle punctures the silicone diaphragm 4 at the first outlet of the arterial cavity 1a, the arterial cavity 1a can be connected to the dialysis equipment through the catheter connected to the no-loss puncture needle.

[0034] The open end of the top of the venous cavity 1b of the embodiment forms a second inlet, which is a venous puncture port. The bottom of the venous cavity 1b is provided with a second outlet, and the silicone diaphragm 4 covers the second inlet of the venous cavity 1b to form a seal for the venous cavity 1b. The second inlet is used to communicate with the dialysis equipment, and the second outlet is used to aseptically communicate with the dialysis catheter 3 to allow the blood treated by the dialysis equipment to flow back to the human body through the dialysis port. After the no-loss puncture needle punctures the silicone diaphragm 4 at the second inlet of the venous cavity 1b, the venous cavity 1b can be connected to the dialysis equipment through the catheter connected to the no-loss puncture needle.

[0035] The top of the arterial cavity 1a and the venous cavity 1b of the embodiment are both processed with a circle of stepped portions for supporting and fixing the silicone diaphragm 4. In some embodiments, color-coded color marks 5 are arranged on the periphery of the first outlet and the periphery of the second inlet, respectively. For example, a red color mark is arranged on the periphery of the first outlet to indicate that the cavity is an arterial cavity, and a blue color mark is arranged on the periphery of the second inlet to indicate that the cavity is a venous cavity. Different color marks 5 are used to facilitate the operator to distinguish the arterial puncture port (first outlet) and the venous puncture port (second inlet) to prevent the puncture from being inserted incorrectly and the positions of the arterial cavity 1a and the venous cavity 1b from being reversed, thereby avoiding reverse dialysis.

[0036] The bottom of the port body 1 has a ring of outwardly protruding fixing parts 1c, and the fixing parts 1c are provided with suture holes 1d. The fixing parts 1c are used to fix the port body 1 under the skin of the human body.

[0037] The first magnet 6 and the second magnet 7 are arranged symmetrically in the port body 1, and the first magnet 6 and the second magnet 7 have opposite magnetic properties. In this embodiment, the first magnet 6 is arranged on the same side as the arterial cavity 1a, and the second magnet 7 is arranged on the same side as the venous cavity 1b.

[0038] The positioning cover 2 is shaped to match the shape of the port body 1, and can cover the periphery of the port body 1 under the skin. The skin is located between the positioning cover 2 and the port body 1. The positioning cover 2 is provided with a first puncture hole 2a and a second puncture hole 2b at the top. When the positioning cover 2 covers the periphery of the port body 1, the first outlet is located below the first puncture hole 2a, the second inlet is located below the second puncture hole 2b, the first outlet is within the range of the first puncture hole 2a, the second inlet is within the range of the second puncture hole 2b, the first outlet can be the same size as the first puncture hole 2a or slightly larger than the first puncture hole 2a, and the second inlet can be the same size as the second puncture hole 2b or slightly larger than the second puncture hole 2b. In this way, the puncture hole of the port body 1 can be positioned by the positioning cover 2, and the positioning cover 2 is covered on the port body 1. As long as the puncture needle is punctured within the range of the puncture hole of the positioning cover 2, it can be accurately inserted into the puncture hole of the port body 1.

[0039] The third magnet 8 and the fourth magnet 9 are arranged in the positioning cover 2, the third magnet 8 is arranged at a position corresponding to the first magnet 6, and the fourth magnet 9 is arranged at a position corresponding to the second magnet 7. In the embodiment, the third magnet 8 is arranged on the same side of the first outlet, and the fourth magnet 9 is arranged on the same side of the second inlet. The third magnet 8 and the fourth magnet 9 have opposite magnetic properties, the third magnet 8 and the first magnet 6 have opposite magnetic properties, and the fourth magnet 9 and the second magnet 7 have opposite magnetic properties. According to the principle that the same magnetic properties repel each other and the different magnetic properties attract each other, because the third magnet 8 on the positioning cover 2 and the first magnet 6 on the harbor body 1 have opposite magnetic properties, and the second magnet 7 has the same magnetic properties, the fourth magnet 9 on the positioning cover 2 and the second magnet 7 on the harbor body 1 have opposite magnetic properties, and the first magnet 6 has the same magnetic properties, therefore, the positioning cover 2 can only be arranged on the harbor body 1 in a specific direction, so that the first magnet 6 and the third magnet 8 can be attracted together, and the second magnet 7 and the fourth magnet 9 can be attracted together, thereby the positioning cover 2 can be arranged on the periphery of the harbor body 1. If the positioning cover 2 is rotated by 180 degrees, it cannot be well arranged on the harbor body 1 because of the repulsion of the same magnetic poles, thereby achieving the effect of preventing mistakes. As long as the positioning cover 2 can be arranged on the periphery of the harbor body 1 and be attracted under the action of the magnets, the first puncture hole 2a on the positioning cover 2 is naturally aligned with the first outlet, and the second puncture hole 2b is naturally aligned with the second inlet, so that the arterial puncture port and the venous puncture port are not mistaken, thereby improving the convenience and accuracy of operation.

[0040] The specific positions and specific numbers of the first magnet 6 and the second magnet 7 in the harbor body 1, and the specific positions and specific numbers of the third magnet 8 and the fourth magnet 9 in the positioning cover 2 can be arranged according to requirements, and the general principle is that the third magnet 8 is arranged corresponding to the first magnet 6, and the fourth magnet 9 is arranged corresponding to the second magnet 7.

[0041] Referring to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8In this embodiment, the arterial lumen 1a and the venous lumen 1b are connected to the dialysis catheter 3 via a Y-shaped connecting tube 10. The Y-shaped connecting tube 10 is disposed within the port body 1, located at the bottom of the port body 1. The Y-shaped connecting tube 10 has a branch segment that divides into two branches and a main body segment formed by the branches. The two branches of the branch segment of the Y-shaped connecting tube 10 are respectively connected to the first inlet of the arterial lumen 1a and the second outlet of the venous lumen 1b, and the main body segment of the Y-shaped connecting tube 10 is connected to the dialysis catheter 3. The main body segment of the Y-shaped connecting tube 10 is actually formed by bonding the two branches of the branch segment together. In this embodiment, the cross-sectional shape of the branch of the Y-shaped connecting tube 10 is semi-circular, and after the two branches merge to form the main body segment, the cross-sectional shape of the main body segment formed by the two branches bonded together is circular. In some embodiments, the Y-shaped connecting tube can also be replaced by a Y-shaped channel processed within the port body, with the branch ends of the Y-shaped channel communicating with the venous lumen and the arterial lumen respectively, and the converging end communicating with the dialysis catheter 3.

[0042] In this embodiment, the dialysis catheter 3 is a double-lumen catheter, meaning that a diaphragm layer is provided inside the catheter, dividing the inner cavity into two independent tubing channels: one is a first channel 3a communicating with the arterial lumen 1a, and the other is a second channel 3b communicating with the venous lumen 1b. An inlet port 3c and an outlet port 3d are provided on the side wall of the tail end of the dialysis catheter 3 (the end furthest from the port body 1). The inlet port 3c communicates with the first channel 3a, and the outlet port 3d communicates with the second channel 3b. The inlet port 3c and the outlet port 3d are staggered along the length of the dialysis catheter 3.

[0043] Preferably, the inlet port 3c is closer to the port 1 than the outlet port 3d. During dialysis treatment, the end of the dialysis catheter 3 is inserted into the central vein of the body in the direction of blood flow. Blood flows into the port 1 from the inlet port 3c and is returned to the body from the outlet port 3d. The inlet port 3c and the outlet port 3d are staggered, and the outlet port 3d is closer to the end of the dialysis catheter 3 than the inlet port 3c. This ensures that the blood returned to the body can flow away with the blood flow and will not be drawn back into the port 1 from the inlet port 3c. This reduces the need for repeated dialysis of purified blood and helps improve the efficiency of dialysis treatment.

[0044] A three-way valve is installed at both the inlet port 3c and the outlet port 3d. The three-way valve is configured to determine whether to open and close, and the direction of opening and closing, based on the internal and external pressure difference. Under negative pressure, the valve opens inward, allowing blood to be drawn; under positive pressure, the valve opens outward, allowing blood transfusion; under balanced pressure, the valve closes to avoid the risks of air embolism, blood reflux, or coagulation. Three-way valves are a mature existing technology; for example, the three-way valve disclosed in patent CN209092516U can be used.

[0045] In this embodiment, the main section of the Y-shaped connecting tube 10 is connected with the dialysis catheter 3 through the quick connecting short tube 11. The quick connecting short tube 11 serves as a connecting piece between the Y-shaped connecting tube 10 and the dialysis catheter 3, and is partially inserted into the port body 1 and communicates with the main section of the Y-shaped connecting tube 10, and the other part is outside the port body 1 and communicates with the dialysis catheter 3. The quick connecting short tube 11 in this embodiment is a double-lumen tube with two independent channels separated by a diaphragm layer, like the dialysis catheter 3. One end of the quick connecting short tube 11 is inserted into the main section of the Y-shaped connecting tube 10, and the other end is inserted into the dialysis catheter 3. The outer wall of the quick connecting short tube 11 tightly fits the inner walls of the Y-shaped connecting tube 10 and the dialysis catheter 3.

[0046] In some embodiments, the quick connecting short tube 11 is connected with the Y-shaped connecting tube 10 and the dialysis catheter 3 in an insertion manner. When the Y-shaped connecting tube 10 and the dialysis catheter 3 are made of soft medical silicone, the quick connecting short tube 11 can be made of hard material. To enhance the tightness of the connection between the Y-shaped connecting tube 10 and the dialysis catheter 3, a locking nut 12 is provided around the connection between the dialysis catheter 3 and the quick connecting short tube 11. External threads are formed on the outer wall of the connection between the dialysis catheter 3 and the quick connecting short tube 11. The locking nut 12 is fitted around the connection between the dialysis catheter 3 and the quick connecting short tube 11. After the locking nut 12 is tightened, it can press the dialysis catheter 3, making the inner wall of the dialysis catheter 3 and the outer wall of the quick connecting short tube 11 fit more tightly, ensuring that the connection is not easily permeable and not easily loose.

[0047] In some embodiments, a conical frustum-shaped plug 13 is provided at the distal end of the dialysis catheter 3 (the end away from the port body). The plug 13 is made of soft material in a conical frustum shape. The conical frustum shape of the plug 13 can facilitate the insertion of the dialysis catheter 3 into the human body blood vessels, and the soft material can avoid injuring the human body blood vessels.

[0048] Before using the dialysis port of this embodiment for dialysis treatment of a patient, the port body 1 is first implanted subcutaneously in the patient, and the positioning cover 2 is used externally. When establishing a hemodialysis access, the dialysis catheter 3 is first implanted by puncturing the central vein through a matching surgical instrument, then the dialysis catheter 3 is adjusted to cooperate with the quick connecting short tube 11, the interface of the quick connecting short tube 11 is inserted into the dialysis catheter 3, and the locking nut 12 is used for fixation. After assembly is completed, the port body 1 is fixed to the subcutaneous tissue through the suture hole on the fixing portion 1c, and the suture wound is completed to establish the dialysis access.

[0049] When the dialysis treatment is performed, since the port 1 is implanted under the skin, it is difficult to directly identify the puncture site and the arteriovenous cavity by naked eyes. Therefore, the positioning cover 2 is first magnetically automatically matched with the port 1. Since the magnet in the positioning cover 2 and the magnet in the port 1 have a specific corresponding relationship in magnetism, when the positioning cover 2 and the port 1 are matched in a wrong direction, the positioning cover 3 and the port 1 cannot be well matched, thereby avoiding the misoperation in use, and when the positioning cover 2 and the port 1 are correctly matched, the puncture hole on the positioning cover 2 and the puncture opening on the port 1 are in position correspondence, so that the implanted dialysis port is accurately positioned in the puncture site, the operator can accurately find the puncture opening, the puncture accuracy is improved, and the puncture openings are not connected in error. In addition, the positioning cover 2 and the port 1 are tightly matched under the action of the magnet, so that the port 1 is not easy to slide, the operator can easily perform the puncture, and the port 1 is also prevented from being displaced in the treatment process, thereby affecting the dialysis treatment.

[0050] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An implantable dialysis port, comprising: include: The harbor body contains independent venous cavities and arterial cavities. The arterial cavity has a first outlet and a first inlet, and the venous cavity has a second inlet and a second outlet. The first outlet and the second inlet are located at the top of the harbor body and are respectively sealed by sealing elements. The harbor body contains a centrally symmetrically arranged first magnet and second magnet, and the first magnet and the second magnet have opposite magnetic properties. A positioning cover that can be placed around the perimeter of the harbor body is provided with a first puncture hole and a second puncture hole. When the positioning cover is placed around the perimeter of the harbor body, the first outlet is located below the first puncture hole and the second inlet is located below the second puncture hole. The positioning cover is provided with a third magnet corresponding to the first magnet and a fourth magnet corresponding to the second magnet. The magnetism of the third magnet is opposite to that of the first magnet, and the magnetism of the fourth magnet is opposite to that of the second magnet.

2. The implantable dialysis hub of claim 1, wherein: The first magnet is located on the same side as the arterial lumen, and the second magnet is located on the same side as the venous lumen.

3. The implantable dialysis hub of claim 1, wherein: It also includes a dialysis catheter, which is a double-lumen catheter with an inlet and an outlet at the tail end. The dialysis catheter is connected to the arterial lumen and the venous lumen through a Y-shaped connecting tube. The Y-shaped connecting tube has a branch section divided into two branches and a main body section in which the two branches are bonded together. The two branches of the branch section are respectively connected to a first inlet located at the bottom of the arterial lumen and a second outlet located at the bottom of the venous lumen. The main body section is connected to the dialysis catheter.

4. The implantable dialysis port of claim 3, wherein: The branch pipe has a semi-circular cross-sectional shape, and the main body section has a circular cross-sectional shape. And / or, the end of the dialysis catheter is provided with a frustoconical plug.

5. The implantable dialysis port of claim 3, wherein: The main body of the Y-shaped connecting tube is connected to the dialysis catheter via a quick-connect short tube. One end of the quick-connect short tube is inserted into the main body and the other end is inserted into the dialysis catheter. The outer wall of the quick-connect short tube is in close contact with the main body and the inner wall of the dialysis catheter.

6. The implantable dialysis hub of claim 5, wherein: A locking nut is provided around the connection between the dialysis catheter and the quick-connect short tube.

7. The implantable dialysis port of claim 3, wherein: The inlet and outlet ports are staggered along the length of the dialysis catheter.

8. The implantable dialysis port of claim 7, wherein: The inlet hole is closer to the harbor body than the outlet hole.

9. The implantable dialysis hub of claim 1, wherein: The perimeter of the first exit and the second entrance is marked with color-coded markers of different colors.

10. The implantable dialysis port of claim 5, wherein: The port body is provided with a Y-shaped channel instead of the Y-shaped connecting pipe.

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