Dialysis catheter

Abstract

The utility model belongs to the field of medical catheter instruments, and particularly relates to a dialysis catheter. Comprising a catheter extending in the longitudinal direction, the catheter comprises a catheter body at the far end and at least two auxiliary catheters communicated with the near end of the catheter body, inner cavities correspondingly communicated with the auxiliary catheters are formed in the catheter body, and side holes corresponding to the far ends of the inner cavities are formed in the catheter body; the base is connected to the near end of the auxiliary catheter and is communicated with the connected auxiliary catheter. The whole dialysis catheter is buried subcutaneously, the wound of the puncture medical instrument to the skin is small and easy to recover, the infection risk is greatly reduced, the base is not exposed out of the body and is relatively stably connected with the skin, the risk that the base is accidentally dragged out does not exist, and the influence on the life of a patient is also remarkably reduced. In addition, sterile liquid can be injected into the dialysis catheter through the side hole, so that the catheter cannot be tightly attached to the superior vena cava, the probability of thrombus formation is reduced, and the dialysis catheter has the advantages of being not prone to infection, small in influence on life and friendly to patients.

Description

Technical Field

[0001] This application belongs to the field of medical catheter devices, specifically relating to a dialysis catheter. Background Technology

[0002] Dialysis catheters are primarily used for patients with kidney failure or other conditions requiring blood purification therapy. Through a hemodialysis catheter, the patient's blood is drawn out of the body, filtered and purified by a dialyzer, and then returned to the patient, thus helping to remove metabolic waste and excess water from the body.

[0003] The base of existing dialysis catheters is exposed to the skin for extended periods. On the one hand, patients must be extremely careful in their daily lives, especially when bathing, to prevent water from coming into contact with the base and thus avoiding the risk of infection from water seeping into the body. This restriction not only increases the psychological burden on patients but also significantly affects their quality of life. On the other hand, the skin around the base cannot heal, and the long-term exposure of the base can easily become a breeding ground for bacteria, increasing the risk of infection. Furthermore, the connection between the base and the skin is not secure enough, and there is a risk that it may be accidentally pulled out. This could not only interrupt the dialysis process but also cause additional pain and discomfort to the patient.

[0004] In summary, existing dialysis catheters present significant problems during practical use, including susceptibility to infection and substantial impact on daily life. To address these issues, we need to explore more advanced and user-friendly dialysis catheter designs to improve patient comfort and safety while reducing their burden in daily life. Summary of the Invention

[0005] The purpose of this application is to provide a humane dialysis catheter that is less prone to infection and has minimal impact on daily life.

[0006] The embodiments of this application can be implemented through the following technical solutions:

[0007] A dialysis catheter includes a catheter extending longitudinally, the catheter including a distal catheter body and at least two auxiliary catheters communicating with the proximal end of the catheter body, the catheter body having an inner lumen communicating with the auxiliary catheters respectively, and having side holes corresponding to the distal ends of the plurality of inner lumens.

[0008] It also includes a base, which is connected to the proximal end of the auxiliary catheter and communicates with the connected auxiliary catheter, and the base is connected to an external hemodialysis machine.

[0009] Furthermore, the base is a cap-shaped structure with one end open and the other end closed, and the open end is connected to a silicone diaphragm.

[0010] Furthermore, it also includes a locking mechanism corresponding to each of the auxiliary conduits. The base has a protrusion on its outer side. The protrusion is a tubular structure. The locking mechanism is sleeved on the outer periphery of the auxiliary conduit and the protrusion, and tightly connects the auxiliary conduit and the protrusion.

[0011] Furthermore, the locking mechanism includes a support ring and a latch. The support ring can be wrapped to form a non-closed cylindrical structure. The latch is connected to one end of the movable end of the support ring, and the other end of the support ring is locked to the latch.

[0012] Furthermore, the ring includes a ring body and an extension portion. One end of the ring body along its wrapping direction is connected to the latch, and the other end is connected to the extension portion. The other end of the extension portion is locked to the latch.

[0013] The width of the extension portion extending longitudinally along the secondary catheter is smaller than the width of the support ring body extending longitudinally along the secondary catheter.

[0014] Preferably, it also includes a retainer, which is sleeved and connected to the outer periphery of the catheter body, and the retainer corresponds to the position of the clavicle.

[0015] Furthermore, the card is made of at least one metal alloy or fiber material selected from stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and precious metal alloy.

[0016] Furthermore, the catheter body is made of at least one of the following materials: silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene, and polytetrafluoroethylene, and its distal end has a pointed bevel structure.

[0017] Furthermore, the number of auxiliary catheters is two.

[0018] Furthermore, the base is made of at least one metal alloy selected from stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy, and precious metal alloy.

[0019] The dialysis catheter provided in the embodiments of this application has at least the following beneficial effects:

[0020] The entire dialysis catheter in this application is implanted subcutaneously. The puncture medical device creates a small, easily healable wound on the skin, significantly reducing the risk of infection. Furthermore, the base is not exposed and its connection to the skin is relatively stable, eliminating the risk of accidental dislodgement and significantly minimizing the impact on the patient's life. In addition, sterile fluid can be injected through the side port of the dialysis catheter, preventing it from adhering tightly to the superior vena cava and reducing the probability of thrombosis. This design offers advantages such as low risk of infection, minimal impact on daily life, and patient-friendly characteristics.

[0021] The dialysis catheter in this application uses a locking device corresponding to the clavicle position. Since the locking device is a foreign body relative to the clavicle, the clavicle will form a tissue sheath to wrap the locking device through its own immune response, thereby fixing the position of the locking device and ensuring the connection stability of the dialysis catheter in the human body together with the base.

[0022] The base, latch, and locking mechanism in this application are all made of metal alloys with excellent biocompatibility, mechanical properties, and corrosion resistance, which not only ensures the support stability between devices but also prevents dissolution in the body and extends the service life of the dialysis catheter.

[0023] The distal end of the catheter body in this application has a pointed bevel structure, and the distal end of the catheter has a gradually changing feature to facilitate smoother guidance of the catheter into the target location during implantation. Especially when it is necessary to pass through narrow or tortuous channels, it can reduce resistance and improve the success rate of insertion. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of the dialysis catheter in this application;

[0025] Figure 2 This is an exploded view of the dialysis catheter in this application;

[0026] Figure 3 This is an overall structural diagram of the base in this application;

[0027] Figure 4 This is an overall structural diagram of the latch in this application.

[0028] Reference numerals: 1. conduit, 11. conduit body, 12. auxiliary conduit, 13. side hole, 2. base, 3. locking symbol, 4. locking mechanism, 41. support ring, 411. support ring body, 412. extension, 42. latch. Detailed Implementation

[0029] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0030] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. Unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0031] Furthermore, in the description of the embodiments of this application, various components on the drawings have been enlarged or reduced for ease of understanding, but this is not intended to limit the scope of protection of this application.

[0032] To make the technical problem solved by this application, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments. For ease of description, the terms "proximal" and "distal" are used in the following description, where "proximal" refers to the end closer to the operator, and "distal" refers to the end farther from the operator and deeper into the blood vessel.

[0033] This application provides a dialysis catheter, such as Figure 1 and Figure 2 As shown, the dialysis catheter includes a longitudinally extending catheter 1. The catheter 1 includes a distal catheter body 11 and at least two auxiliary catheters 12 communicating with the proximal end of the catheter body 11. The catheter body 11 has an inner lumen that communicates with each of the auxiliary catheters 12. The sidewall of the catheter body 11 has side holes 13 corresponding to the distal ends of the multiple inner lumens. The dialysis catheter also includes a base 2, which is connected to the proximal end of the auxiliary catheters 12 and communicates with the corresponding auxiliary catheters 12. In use, the entire dialysis catheter is implanted subcutaneously. The distal side holes 13 communicate with the blood vessels of the human body, and the proximal base 2 is connected to an external hemodialysis machine through a puncture medical device. The base 2 is a foreign body relative to the human body. The inner side of the skin can form a tissue sheath through its own immune response to wrap the base 2, thereby fixing the position of the base 2 and ensuring the connection stability of the dialysis catheter in the body. The entire dialysis catheter is embedded subcutaneously, resulting in a small and easily healed wound on the skin, significantly reducing the risk of infection. Furthermore, the base 2 is not exposed and its connection to the skin is relatively stable, eliminating the risk of accidental dislodgement and significantly minimizing the impact on the patient's life. Additionally, sterile fluid can be injected through the side port 13, preventing the catheter 1 from adhering tightly to the superior vena cava and reducing the probability of thrombosis.

[0034] Furthermore, such as Figure 3 As shown, base 2 is a cap-shaped structure with one open end and one closed end. The open end has external threads on its outer periphery, allowing it to connect with a silicone diaphragm. Puncture devices such as butterfly needles can puncture the silicone diaphragm and connect to the interior of base 2, allowing blood to flow out only through the butterfly needle. This results in a small wound and simple operation. Furthermore, after dialysis, once the butterfly needle is removed, the silicone diaphragm's high elasticity allows it to close the channel created by the butterfly needle puncture, reducing bleeding and recovery time, and minimizing patient discomfort.

[0035] In some preferred embodiments of this application, the sidewalls and end faces of the base 2 are arc-shaped structures, which can fit the skin completely and smoothly, reducing the risk of the base 2 edges cutting the tissue.

[0036] In some specific embodiments of this application, the base 2 is made of at least one metal alloy selected from stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and precious metal alloy, which has excellent biocompatibility, mechanical properties and corrosion resistance, ensuring the stability of the support and extending the service life of the dialysis catheter.

[0037] In some other specific embodiments of this application, the base 2 may also be made of fiber material, which has the characteristics of being lightweight and high-strength, having good biocompatibility, low cost, being easy to process and shape, having excellent X-ray transmittance, good electrical conductivity and corrosion resistance.

[0038] Furthermore, the base 2 has a through hole on its side wall that aligns with the secondary conduit 12, and the base 2 forms a connected pipeline with the secondary conduit 12 through the through hole in its side wall. The base 2 is connected to the secondary conduit 12 by means of gluing, welding, or setting a connection structure. Regardless of the connection method, as long as a stable connection between the base 2 and the secondary conduit 12 can be achieved, it is acceptable.

[0039] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, in order to achieve a stable connection between the base 2 and the auxiliary catheter 12, the dialysis catheter also includes a locking mechanism 4 corresponding to the auxiliary catheter 12. The base 2 has a protrusion on its outer side. The protrusion is a tubular structure that extends into the proximal lumen of the auxiliary catheter 12. The locking mechanism 4 is sleeved on the outer periphery of the auxiliary catheter 12 and the protrusion. The locking mechanism 4 tightly connects the proximal end of the auxiliary catheter 12 with the protrusion to prevent the base 2 from coming out of the auxiliary catheter 12.

[0040] Specifically, the locking mechanism 4 extends along the longitudinal direction of the auxiliary conduit 12.

[0041] Furthermore, such as Figure 4 As shown, the locking mechanism 4 includes a support ring 41 and a latch 42. The support ring 41 can be wrapped to form a non-closed cylindrical structure. The latch 42 is connected to one end of the movable end of the support ring 41, and the other end of the movable end of the support ring 41 is locked to the latch 42. The support ring 41 achieves a tight connection with the auxiliary conduit 12 and the protrusion by locking to the latch 42.

[0042] In some preferred embodiments of this application, the support ring 41 includes a support ring body 411 and an extension 412. The width of the extension 412 extending longitudinally along the auxiliary catheter 12 is smaller than the width of the support ring body 411 extending longitudinally along the auxiliary catheter 12. One end of the support ring body 411 along its wrapping direction is connected to the locking buckle 42, and the other end is connected to the extension 412. The other end of the extension 412 is locked to the locking buckle 42. On the one hand, the extension 412 is locked to the support ring body 411 through the locking buckle 42, making the clamping effect stable and reliable. On the other hand, the longitudinal unit coverage area of ​​the extension 412 is smaller than the longitudinal unit coverage area of ​​the support ring body 411, which can reduce the weight of the locking mechanism 4 and reduce the burden on the patient.

[0043] In some specific embodiments of this application, the number of extension units 412 is one or more, and the number of extension units 412 can be set according to actual needs.

[0044] In some preferred embodiments of this application, the locking buckle 42 achieves a locking connection with the extension 412 by sliding and biting the extension 412 through a sawtooth structure, and the outer diameter of the cavity formed by the adjustable support ring 41 can be adjusted to fit and hold the auxiliary conduit 12 with different outer diameters.

[0045] In some specific embodiments of this application, the locking mechanism 4 is made of at least one metal alloy selected from stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and precious metal alloy, which has excellent biocompatibility, mechanical properties and corrosion resistance. It not only ensures the support stability of the connection between the auxiliary catheter 12 and the protrusion, but also prevents it from being dissolved in the body, further extending the service life of the dialysis catheter.

[0046] In some preferred embodiments of this application, such as Figure 1 and Figure 2 As shown, the dialysis catheter also includes a retainer 3, which is fitted and connected to the periphery of the catheter body 11, and the retainer 3 corresponds to the position of the clavicle. Since the retainer 3 is a foreign body relative to the clavicle, the clavicle will form a tissue sheath to wrap the retainer 3 through its own immune response, thereby fixing the position of the retainer 3, which, together with the base 2, ensures the connection stability of the dialysis catheter in the human body.

[0047] In some preferred embodiments of this application, the card symbol 3 is made of at least one metal alloy selected from stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and precious metal alloy, which has excellent biocompatibility, mechanical properties and corrosion resistance. It not only ensures the support stability of the connection with the clavicle, but also prevents it from being dissolved in the body, thereby further extending the service life of the dialysis catheter.

[0048] In some specific embodiments of this application, the catheter 1 is made of at least one material selected from silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene, and polytetrafluoroethylene. Catheters made of these materials have good adaptability and flexibility, easily adapting to various bends and narrow passages within the human body, and can precisely reach the lesion site for accurate treatment, thereby improving the success rate and safety of the surgery. They also reduce damage and irritation during insertion, thus lowering the risk of infection and improving the patient's treatment outcome and safety.

[0049] In some preferred embodiments of this application, since the catheter 1 is generally soft, it is prone to bending and kinking during implantation, increasing the difficulty of implantation. Figure 1 and Figure 2 As shown, the distal end of the catheter body 11 in this application has a pointed bevel structure, and the distal end of the catheter 1 has a gradually changing characteristic, which facilitates smoother guidance of the catheter 1 into the target position during implantation. Especially when it is necessary to pass through narrow or tortuous channels, it can reduce resistance and improve the success rate of insertion.

[0050] In some specific embodiments of this application, the number of auxiliary catheters 12 is two or three. When there are two auxiliary catheters 12, the two side holes 13 are connected to the patient's arterial and venous vessels respectively, and connected to an external hemodialysis machine via the base 2 and the puncture medical device, thus forming a blood circulation loop to complete the dialysis procedure. When there are three auxiliary catheters 12, two of the side holes 13 are used to connect to the patient's arterial and venous vessels respectively, and the last one is used for emergency treatment, such as pushing it to the superior vena cava of the heart or the venous cavity of the leg through a built-in manipulating guidewire, so as to achieve treatment of other diseases of the patient while performing dialysis. It is conceivable that the number of auxiliary catheters 12 can also be set to four, five or more. In actual use, the number of auxiliary catheters 12, side holes 13, base 2 and locking mechanism 4 can be set according to actual needs.

[0051] like Figure 1 and Figure 2 As shown, the more accessory catheters 12 there are, the easier it is for them to get tangled and form thrombi. Therefore, in some preferred embodiments of this application, the number of accessory catheters 12 is two.

[0052] In summary, the method of using the dialysis catheter in this application is as follows:

[0053] S1: The dialysis catheter is implanted into the body, with the side hole 13 connected to the arterial and venous vessels respectively, the card 3 placed at the corresponding position of the clavicle, and the base 2 placed under the skin;

[0054] S2: Insert the puncture device connected to the external hemodialysis machine into the silicone diaphragm of the base 2;

[0055] S3: Start the hemodialysis machine until the dialysis treatment is completed;

[0056] S4: Turn off the hemodialysis machine;

[0057] S5: Consider whether to remove the puncture device based on the patient's condition, and at what time.

[0058] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A dialysis catheter, characterized in that: comprising a catheter (1) extending longitudinally, the catheter (1) comprising a catheter body (11) at the distal end and at least two sub-catheters (12) in communication with the catheter body (11) proximally, the catheter body (11) is provided with a lumen corresponding to the sub-catheter (12) in communication respectively, which is provided with a side hole (13) corresponding to a plurality of lumens distal end; Further comprising a base (2), the base (2) is connected to the proximal end of the sub-catheter (12) and communicates with the connected sub-catheter (12), the base (2) is connected with the external hemodialysis machine; Further comprising a locking mechanism (4) corresponding to the sub-catheter (12), the outer side of the base (2) is provided with a protruding part, the protruding part is a tubular structure, the locking mechanism (4) is sleeved on the outer periphery of the sub-catheter (12) and the protruding part, and the sub-catheter (12) is tightly connected with the protruding part.

2. The dialysis catheter according to claim 1, characterized in that: the base (2) is a cap-shaped structure with one end open and the other end closed, and the open end is connected with a silica gel diaphragm.

3. The dialysis catheter according to claim 1, characterized in that: the locking mechanism (4) comprises a supporting ring (41) and a lock (42), the supporting ring (41) can be wrapped to form a non-closed cylindrical structure, the lock (42) is connected to one end of the movable end of the supporting ring (41), and the other end of the supporting ring (41) is locked with the lock (42).

4. The dialysis catheter according to claim 3, characterized in that: the supporting ring (41) comprises a supporting ring body (411) and an expansion part (412), one end of the supporting ring body (411) is connected with the lock (42) along the wrapping direction, the other end is connected with the expansion part (412), and the other end of the expansion part (412) is locked with the lock (42); The width of the expansion part (412) along the longitudinal extension direction of the sub-catheter (12) is less than the width of the supporting ring body (411) along the longitudinal extension of the sub-catheter (12).

5. The dialysis catheter according to claim 1, characterized in that: further comprising a card symbol (3), the card symbol (3) is sleeved and connected to the outer periphery of the catheter body (11), and the card symbol (3) corresponds to the position of the clavicle.

6. The dialysis catheter according to claim 5, characterized in that: the card symbol (3) is made of one of stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and noble metal alloy or fiber material.

7. The dialysis catheter according to claim 1, characterized in that: the catheter body (11) is made of one of silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene and polytetrafluoroethylene material, and the distal end is a sharp bevel structure.

8. The dialysis catheter according to claim 1, characterized in that: the number of sub-catheters (12) is two.

9. The dialysis catheter according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ The base (2) is made of one of stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and noble metal alloy.

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