Implantable hemodialysis instrument

Abstract

The invention discloses an implantable hemodialysis instrument, and relates to the field of medical appliances, the implantable hemodialysis instrument comprises a dialysis port body and a catheter, the catheter is provided with a plurality of groups of puncture holes, the dialysis port body communicated with the puncture holes is installed at the puncture holes, and the dialysis port body comprises a polyester sleeve and a port body; a puncture part capable of being rotationally adjusted is arranged in the port body, a first conical hole and a second conical hole are formed in the port body from top to bottom, and the taper angle of the first conical hole is larger than that of the second conical hole. The puncture piece is rotationally adjusted on the port body, the purpose of adjusting the puncture face is achieved, medical staff can conduct multiple times of puncture on the port body, meanwhile, the taper angle of the first taper hole is large, the medical staff can conveniently and accurately insert a puncture needle into the port body in the puncture process, and the puncture efficiency is improved. And the outlet of the second conical hole is tightly matched with the puncture needle, so that the phenomenon that the puncture needle is excessively inserted and the catheter is punctured by the puncture needle is further prevented.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to an implantable hemodialysis device. Background Technology

[0002] Hemodialysis is one of the main methods of renal replacement therapy for patients with end-stage renal disease. Vascular access is the "lifeline" for uremia patients to survive. Stable and reliable vascular access is the basic guarantee for maintenance hemodialysis patients. According to the latest "Chinese Expert Consensus on Vascular Access for Hemodialysis", there is currently no absolutely ideal type of vascular access. Referring to the recommendations of some international guidelines, the domestic expert group believes that autogenous arteriovenous fistula should be the first choice for long-term vascular access.

[0003] When an autogenous arteriovenous fistula cannot be established, artificial blood vessels are the second choice, and long-term dialysis catheters are the last resort. However, due to factors such as population aging, the increasing dialysis duration of maintenance hemodialysis patients, and the rising incidence of hypertension, diabetes, and autoimmune diseases, establishing autogenous arteriovenous fistulas is becoming increasingly difficult. Long-term dialysis catheters have high rates of infection and thrombosis, and are difficult to treat, so they are not the best choice for long-term dialysis. Artificial blood vessels are relatively safe and reliable in clinical use, but currently, the products on the domestic market are expensive and have high maintenance costs, which are unaffordable for patients. Therefore, infusion ports are now commonly used for hemodialysis.

[0004] The existing port-a-cath is a closed infusion device that is completely implanted in the human body. It includes a catheter with its tip located in the superior vena cava and an injection port implanted under the skin. When in use, the staff locates the port-a-cath and presents it to the medical staff by hand. Then, the puncture needle is gently inserted vertically into the septum from the key point of the port-a-cath until it reaches the bottom of the reservoir. During this process, blood products and hypertonic drugs can be infused.

[0005] Because the aforementioned devices cannot repeatedly puncture a single septum with the puncture needle during use, they need to be replaced after all punctures have been performed on the septum surface. This process significantly reduces the overall lifespan. Furthermore, since medical personnel rely entirely on touch during punctures, inexperienced medical staff are highly susceptible to puncturing the catheter with the puncture needle, which could endanger the patient's life and health and reduce the device's overall usability.

[0006] In summary, the aforementioned institutions require replacement of the puncture diaphragm after each puncture, which significantly reduces its overall lifespan. Furthermore, when inexperienced medical personnel perform the punctures, there is a high risk of the puncture needle puncturing the catheter. Summary of the Invention

[0007] Based on this, the purpose of the present invention is to provide an implantable hemodialysis device to solve the technical problems of the above-mentioned devices, which require replacement after puncture of the puncture diaphragm surface during use, which increases the overall service life. At the same time, when puncture is performed by inexperienced medical personnel, the puncture needle is very likely to puncture the catheter.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an implantable hemodialysis device, comprising a dialysis port body and a catheter, wherein the catheter is provided with an array of puncture holes, and a dialysis port body connected to the puncture holes is installed at the puncture holes. The dialysis port body comprises a polyester sleeve and a port body, wherein a rotatable and adjustable puncture element is provided within the port body, and a first conical hole and a second conical hole are provided from top to bottom at the bottom of the puncture element within the port body, wherein the cone angle of the first conical hole is greater than the cone angle of the second conical hole.

[0009] By adopting the above technical solution, the puncture device is rotated and adjusted within the portacavum so that the other side of the puncture device faces the top of the portacavum, thereby adjusting the puncture surface. This allows medical personnel to perform multiple punctures, improving its overall service life. The first conical orifice has a larger cone angle, facilitating accurate insertion of the puncture needle into the portacavum during puncture and allowing subsequent adjustments to the puncture surface. The second conical orifice has a smaller cone angle than the first, and its outlet closely engages with the puncture needle, acting as a limit and preventing medication from remaining in the portacavum during infusion. It also further prevents over-insertion of the puncture needle, thus avoiding puncture of the catheter.

[0010] The present invention is further configured such that a first magnet is disposed inside the puncture member, and the first magnet is located at a non-central position inside the puncture member.

[0011] By adopting the above technical solution, when the sealing performance of the puncture device decreases after repeated punctures by the puncture needle, medical personnel can adjust the angle by using a magnet to attract the first magnet located outside the center of the puncture device, thereby adjusting the puncture surface. This adjustment method can adjust the position of the puncture device without surgically damaging the human skin, reducing the overall comfort of the patient and improving the overall practicality.

[0012] The present invention is further configured such that a rotating shaft is provided inside the harbor body, and a torsion spring is connected to the inner side of the rotating shaft. A second magnet is provided at the middle position of the rotating shaft, and a lever is connected to one end of the second magnet. The piercing member is rotatably disposed within the harbor body via a fixed axis, and ratchet teeth that cooperate with the lever are arranged around the outer wall of the piercing member.

[0013] By adopting the above technical solution, based on the principle of like poles repelling each other, when medical personnel bring an external magnet close to the second magnet, the second magnet will drive the lever on its rotating shaft to rotate. Through the engagement of the lever with the ratchet on the puncture piece, the puncture piece will rotate at a certain angle, so that the angle of the puncture piece is fixed each time the medical personnel adjust it. This allows the medical personnel to maximize the use of the puncture surface of the puncture piece and further improve the overall service life of the puncture piece.

[0014] The present invention is further configured such that the outer wall of the catheter is symmetrically provided with dialysis port bodies, and the two sets of dialysis port bodies are installed in opposite directions.

[0015] By adopting the above technical solution, it is easier for medical staff to perform blood aspiration and reinfusion after dialysis filtration.

[0016] The present invention is further configured such that an end cap is detachably provided on the top of the harbor body.

[0017] By adopting the above technical solution, the detachable connection between the end cap and the port body facilitates the replacement of internal puncture components by medical personnel. At the same time, when thromboembolism occurs in the catheter lumen, the detachable connection between the end cap and the port body can be used as a treatment channel to remove the thrombus, reducing patient pain, simplifying surgical procedures, and lowering treatment costs.

[0018] The present invention is further configured such that the dialysis port body and the catheter form an angle of 30°–60°.

[0019] By adopting the above technical solution, when medical personnel implant the device under the skin, it can be positioned on the body surface, making it easier for medical personnel to perform puncture directly and improving the overall puncture efficiency and accuracy.

[0020] The present invention is further configured such that the force of the torsion spring is less than the repulsive force between its two sets of magnets.

[0021] By adopting the above technical solution, when medical personnel approach the external magnet, the repulsive force of the two sets of magnets will cause their torsion springs to rotate. At the same time, after the internal puncture device is adjusted, the medical personnel move the magnet away from the second magnet. At this time, the torsion spring's own reset action will cause its lever to reset, making it convenient to adjust the puncture device next time.

[0022] The present invention is further configured such that the lever is concave and a ratchet tooth that cooperates with the lever is wound around the outer wall of the puncture member.

[0023] By adopting the above technical solution, the concave design of the lever and ratchet makes it easier for medical personnel to accurately locate the center of the puncture device during puncture, thereby further improving the overall puncture efficiency.

[0024] The present invention is further configured such that the polyester sheath tightly wraps around its harbor body.

[0025] By adopting the above technical solution, after the device is implanted into the human subcutaneous tissue, the polyester sleeve will grow together with the human subcutaneous tissue, reducing the body's rejection and preventing the dialysis port from shifting, thus improving its overall practicality.

[0026] In summary, the present invention has the following main beneficial effects:

[0027] 1. This invention features a rotatable circular puncture device within the port body. After multiple punctures by medical personnel, the puncture device can be rotated within the port body to adjust its orientation, allowing the other side of the puncture device to face the top of the port body. This adjusts the puncture surface, expanding its overall puncture area and facilitating multiple punctures, thus extending its overall lifespan. The port body itself is conical, with a first and second conical hole inside for drawing or delivering blood and medication. The first conical hole has a larger cone angle, facilitating accurate insertion of the puncture needle during puncture and allowing subsequent adjustments to the puncture surface. The second conical hole has a smaller cone angle than the first, and its outlet closely engages with the puncture needle, acting as a limit and preventing medication from remaining within the port body during infusion. It also prevents over-insertion of the puncture needle, thus avoiding puncture and improving overall usability while ensuring patient safety.

[0028] 2. The present invention provides a first magnet located at a non-central position inside the puncture piece. When the sealing performance of the puncture piece decreases due to repeated punctures by the puncture needle, medical personnel can use the magnet outside the body to attract the first magnet located at the non-central position inside the puncture piece to adjust the angle, thereby adjusting the puncture surface. This adjustment method can adjust the position of the puncture piece without surgically damaging the human skin, reducing the overall comfort of the patient and improving the overall practicality.

[0029] 3. This invention features a rotating shaft inside the port body, with a lever connected to the shaft via a second magnet. The puncture piece rotates at the center of the port body via a fixed axis. Utilizing the principle of like poles repelling each other, when medical personnel bring an external magnet close to the second magnet, the second magnet drives the lever on its rotating shaft to rotate. The lever engages with the ratchet on the puncture piece, causing it to rotate at a certain angle. This ensures that the angle of the puncture piece is always fixed when medical personnel adjust it, maximizing the use of the puncture surface and further improving the overall service life of the puncture piece. Attached Figure Description

[0030] Figure 1 This is an exploded view of the present invention;

[0031] Figure 2 This is a schematic diagram of the puncture hole structure of the present invention;

[0032] Figure 3 This is the front view of the present invention;

[0033] Figure 4 This is a schematic diagram of the puncture needle insertion structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the port body installation structure of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0037] Figure 8 This is a top view of the puncture component of the present invention;

[0038] Figure 9 This is a partial structural diagram of the second embodiment of the present invention.

[0039] In the diagram: 1. Dialysis port body; 2. End cap; 3. Puncture piece; 4. Port body; 5. Holder; 6. Catheter; 7. Polyester sleeve; 8. Puncture hole; 9. First conical hole; 10. Second conical hole; 11. First magnet; 12. Lever; 13. Torsion spring; 14. Ratchet; 15. Second magnet; 16. Rotary shaft. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] The embodiments of the present invention will now be described.

[0042] Example 1

[0043] An implantable hemodialysis device, such as Figures 1-6As shown, the device includes a dialysis port body 1, a catheter 6, a repositioning mechanism, and an adjustment mechanism. The device is implanted subcutaneously in the patient's forearm to connect and anastomose the patient's artery and vein, creating a graft-operated fistula for dialysis. The port body 1 is securely attached to the puncture port 8 of the catheter 6 by tightly wrapping its outer wall with a polyester sheath 7, which, in conjunction with a retainer 5, provides positioning for the dialysis port body 1. After subsequent implantation into the subcutaneous tissue, the polyester sheath 7 will grow together with the tissue, reducing rejection and preventing displacement of the dialysis port body 1. To improve its overall practicality, an adjustable rotating puncture element 3 is installed inside the port body 4. A first magnet 11 is located at a non-central position inside the puncture element 3. When the sealing performance of the puncture element 3 decreases after repeated punctures by the puncture needle, medical personnel can adjust the angle by using the magnet to attract the first magnet 11 at the non-central position inside the puncture element 3 from outside the body. This adjusts the puncture surface, expanding it to allow for multiple punctures. This adjustment method allows for the repositioning of the puncture element 3 without surgical damage to the skin. This design reduces overall patient comfort while improving overall usability. The puncture device 3, located inside the port body 4, has a first conical hole 9 and a second conical hole 10 formed from top to bottom at its bottom. The first conical hole 9 has a larger cone angle, facilitating accurate insertion of the puncture needle into the port body 4 during puncture and allowing for subsequent adjustment of the puncture surface of the puncture device 3. The second conical hole 10 has a smaller cone angle than the first conical hole 9, and its outlet closely engages with the puncture needle, acting as a limit and preventing drug residue during infusion. The catheter is left inside the port 4, which further prevents the puncture needle from being inserted too far, thus avoiding puncture of the catheter 6. This improves the overall usability and ensures the safety of the patient's life and health. It also enhances the "sealing" effect of the product. The catheter 6 is made of silicone, polyurethane, and polytetrafluoroethylene, which has the effect of automatic closure after repeated punctures, making it easy for the puncture needle to puncture multiple times. At the same time, two sets of dialysis port bodies 1 are symmetrically arranged on the outer wall of the catheter 6, and the two sets of dialysis port bodies 1 are installed in opposite directions, which facilitates subsequent blood aspiration and reinfusion after dialysis filtration by medical staff.

[0044] Please see Figure 1 and Figure 2 The dialysis port body 1 and the catheter 6 are at a 45° angle. When medical personnel implant the device under the skin, it can be positioned on the body surface, making it easier for medical personnel to perform puncture directly and improving the overall puncture efficiency and accuracy.

[0045] Please see Figure 1 , Figure 3 and Figure 6The top of the port body 4 is detachably equipped with an end cap 2. The detachable connection between the end cap 2 and the port body 4 facilitates the replacement of the internal puncture element 3 by medical personnel. At the same time, when a thromboembolism occurs in the lumen of the catheter 6, the detachable connection between the end cap 2 and the port body 4 can be used as a treatment channel to remove the thrombus, reduce patient pain, simplify surgical procedures and reduce treatment costs.

[0046] Example 2

[0047] An implantable hemodialysis device, such as Figures 7-9 As shown, the port body 4 has a rotating shaft 16 inside, and a torsion spring 13 is connected to the inner side of the rotating shaft 16. The force of the torsion spring 13 is less than the repulsive force between the two sets of magnets. At the same time, the puncture piece 3 is rotated inside the port body 4 via a fixed axis. When the medical staff uses the external magnet to approach the second magnet 15, the repulsive force of the two sets of magnets will drive the torsion spring 13 to rotate due to the principle of like poles repelling each other. The second magnet 15 will drive the lever 12 on its rotating shaft to rotate. Through the engagement of the lever 12 with the ratchet 14 on the puncture piece 3, the puncture piece 3 will rotate at a certain angle. When the medical staff moves the magnet away from the second magnet 15, the torsion spring 13 will reset itself, which will drive the lever 12 to reset, making it convenient to adjust the puncture piece 3 next time. This ensures that the angle of the puncture piece is fixed every time the medical staff adjusts it, so that the medical staff can maximize the use of the puncture surface of the puncture piece 3 and further improve the overall service life of the puncture piece.

[0048] Please see Figure 7 , Figure 8 and Figure 9 The lever 12 is concave, and a ratchet 14 that cooperates with the lever 12 is wrapped around the outer wall of the puncture member 3. The concave lever 12 and ratchet 14 make it easier for medical personnel to accurately find the center position of the puncture member 3 when performing puncture, thereby further improving the overall puncture efficiency.

[0049] The working principle of this invention is as follows: In use, the dialysis port body 1 is fixed to the puncture hole 8 on the outer wall of the catheter 6 by the card holder 5, and the puncture element 3 is rotatably arranged inside the port body 4, which facilitates medical personnel to perform multiple punctures on the puncture element 3, and then adjust the angle of the internal puncture element 3 to adjust the puncture surface. This allows medical personnel to perform multiple punctures, improving its overall service life. At the same time, a first conical hole 9 and a second conical hole 10 are provided inside the port body 4. The first conical hole 9 facilitates the accurate insertion of the puncture needle into the port body 4, and the second conical hole 10 can limit the puncture needle, further preventing the puncture needle from being over-inserted, thereby puncturing the catheter 6, improving its overall practicality, and ensuring the life and health safety of the patient.

[0050] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An implantable hemodialysis device, comprising a dialysis port body (1) and a catheter (6), characterized in that: The catheter (6) is provided with an array of puncture holes (8), and a dialysis port body (1) connected to the puncture holes (8) is installed at the puncture holes (8). The dialysis port body (1) includes a polyester sleeve (7) and a port body (4). The port body (4) is provided with a rotatable and adjustable puncture element (3). The port body (4) is provided with a first conical hole (9) and a second conical hole (10) from top to bottom at the bottom of the puncture element (3). The cone angle of the first conical hole (9) is greater than the cone angle of the second conical hole (10).

2. The implantable hemodialysis device according to claim 1, characterized in that: The puncture member (3) is provided with a first magnet (11) inside, and the first magnet (11) is located at a non-central position inside the puncture member (3).

3. An implantable hemodialysis device according to claim 1, characterized in that: The harbor body (4) is provided with a rotating shaft (16) inside, and a torsion spring (13) is connected to the inner side of the rotating shaft (16). A second magnet (15) is provided at the middle position of the rotating shaft (16), and a lever (12) is connected to one end of the second magnet (15). The piercing member (3) is rotatably arranged in the harbor body (4) through a fixed axis, and ratchet teeth (14) that cooperate with the lever (12) are arranged around the outer wall of the piercing member (3).

4. An implantable hemodialysis device according to claim 1, characterized in that: The outer wall of the catheter (6) is symmetrically provided with dialysis port bodies (1), and the two sets of dialysis port bodies (1) are installed in opposite directions.

5. An implantable hemodialysis device according to claim 1, characterized in that: The top of the harbor body (4) is detachably provided with an end cap (2).

6. An implantable hemodialysis device according to claim 1, characterized in that: The dialysis port body (1) and the catheter (6) are at an angle of 30° to 60°.

7. An implantable hemodialysis device according to claim 3, characterized in that: The force of the torsion spring (13) is less than the repulsive force between its two sets of magnets.

8. An implantable hemodialysis device according to claim 3, characterized in that: The lever (12) is concave and has ratchet teeth (14) that cooperate with the lever (12) wrapped around the outer wall of the piercing member (3).

9. An implantable hemodialysis device according to claim 1, characterized in that: The polyester sleeve (7) tightly wraps around its port body (4).

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