Dialysis catheter

Abstract

The invention 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] The present application belongs to the field of medical catheter instruments, and specifically relates to a dialysis catheter. Background Art

[0002] Hemodialysis catheters are mainly used for patients with renal failure or other patients who need blood purification treatment. Through the hemodialysis catheter, the patient's blood can be drawn out of the body, filtered and purified by the dialyzer, and then returned to the patient's body, thereby helping the patient eliminate metabolic waste and excess water in the body.

[0003] The base of existing dialysis catheters is exposed to the skin surface for a long time. On the one hand, patients must be extra cautious in daily life, especially when bathing, to prevent bath water from coming into contact with the base, thereby avoiding the risk of infection caused by water seeping into the body. This restriction not only increases the psychological burden of patients, but also significantly affects their quality of life. On the other hand, the skin around the base cannot heal, and the long-exposed base can easily become a breeding ground for bacteria, increasing the risk of infection. In addition, the connection between the base and the skin is not stable enough, and there is a risk of being accidentally dragged out, which can easily lead to the interruption of the dialysis process and cause additional pain and discomfort to the patient.

[0004] In summary, existing dialysis catheters have significant problems in practical use, such as easy infection and great impact on life. In order to solve the above problems, we need to explore more advanced and humanized dialysis catheter designs to improve the comfort and safety of patients and reduce their burden in daily life. Summary of the invention

[0005] The purpose of the present application is to provide a humanized dialysis catheter that is not prone to infection and has little impact on life.

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

[0007] A dialysis catheter comprises a catheter extending in a longitudinal direction, the catheter comprising a catheter body at a distal end and at least two auxiliary catheters connected to the proximal end of the catheter body, the catheter body is provided with inner cavities corresponding to the auxiliary catheters respectively, and the catheter body is provided with side holes corresponding to the distal ends of the inner cavities;

[0008] It also includes a base, which is connected to the proximal end of the auxiliary conduit and communicates with the connected auxiliary conduit. The side wall and end surface of the base are both arc-shaped structures, 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 cooperatively connected with the silicone diaphragm.

[0010] Preferably, it also includes a locking mechanism corresponding to the secondary conduit one by one, a protrusion is provided on the outer side of the base, the protrusion is a tubular structure, the locking mechanism is sleeved on the outer circumference of the secondary conduit and the protrusion, and tightly connects the secondary conduit with the protrusion.

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

[0012] Further, the support ring comprises a support ring body and an extension portion, one end of the support ring body along its wrapping direction is connected to the lock buckle, and the other end is connected to the extension portion, and the other end of the extension portion is locked and connected to the lock buckle;

[0013] The width of the expansion portion along the longitudinal extension direction of the secondary conduit is smaller than the width of the support ring body along the longitudinal extension direction of the secondary conduit.

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

[0015] Furthermore, the card symbol 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 silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene, and polytetrafluoroethylene, and its distal end is a sharp bevel structure.

[0017] Furthermore, the number of the secondary conduits is two.

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

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

[0020] The entire dialysis catheter in this application is buried under the skin, and the wound caused by the puncture medical device on the skin is small and easy to recover, which greatly reduces the risk of infection. The base is not exposed to the outside of the body and is relatively stable in connection with the skin, so there is no risk of being accidentally dragged out, which also significantly reduces the impact on the patient's life. In addition, the dialysis catheter can be injected with sterile liquid through the side hole, so that the catheter will not be close to the superior vena cava, reducing the probability of thrombosis, and has the advantages of not easy to infect, little impact on life, and patient-friendly;

[0021] The dialysis catheter in the present application is provided with a card symbol corresponding to the position of the clavicle. Since the card symbol is a foreign body relative to the clavicle, the clavicle will form a layer of tissue sheath to wrap the card symbol through its own immune response, thereby fixing the position of the card symbol and jointly ensuring the connection stability of the dialysis catheter in the human body with the base;

[0022] The base, lock and locking mechanism in the present application are all made of metal alloys with excellent biocompatibility, mechanical properties and corrosion resistance, which not only ensure the support stability between the devices, but also avoid being dissolved in the body, thereby extending the service life of the dialysis catheter;

[0023] The distal end of the catheter body in the present application is a sharp bevel structure, and the distal end of the catheter presents a gradually changing feature, which is conducive to guiding the catheter into the target position more smoothly during the implantation process. In particular, when it is necessary to pass through a narrow or curved channel, it can reduce resistance and improve the success rate of insertion. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 An exploded view of the dialysis catheter in this application;

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

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

[0028] Figure numerals: 1. catheter, 11. catheter body, 12. auxiliary catheter, 13. side hole, 2. base, 3. latch, 4. locking mechanism, 41. support ring, 411. support ring body, 412. extension part, 42. lock. DETAILED DESCRIPTION

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

[0030] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. Unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a communication between the two components. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0031] In addition, in the description of the embodiments of the present application, various components on the drawings are enlarged or reduced in size for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0032] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present application are further explained below in conjunction with the accompanying drawings and through specific implementation methods. For the convenience of description, the following description uses the terms "proximal end" and "distal end", where "proximal end" refers to the end close to the operator and "distal end" refers to the end far away from the operator and deep into the blood vessel.

[0033] The present application provides a dialysis catheter, such as Figure 1 and Figure 2 As shown, the dialysis catheter includes a catheter 1 extending in the longitudinal direction, the catheter 1 includes a catheter body 11 at the distal end and at least two secondary catheters 12 connected to the proximal end of the catheter body 11, the catheter body 11 is provided with inner cavities corresponding to the secondary catheters 12, and the side wall of the catheter body 11 is provided with side holes 13 corresponding to the distal ends of the multiple inner cavities, and the dialysis catheter also includes a base 2, which is connected to the proximal end of the secondary catheter 12 and connected to the correspondingly connected secondary catheter 12. When in use, the entire dialysis catheter is buried under the skin, the side hole 13 at the distal end is connected to the blood vessels of the human body, and the base 2 at the proximal end is connected to an external hemodialysis machine through a puncture medical device. The base 2 is a foreign body relative to the human body, and the inner side of the skin can form a layer of tissue sheath to wrap the base 2 through its own immune response, thereby forming a fixed position of the base 2, thereby ensuring the connection stability of the dialysis catheter in the body. The entire dialysis catheter is buried under the skin, and the wound caused by the puncture medical device on the skin is small and easy to recover, which greatly reduces the risk of infection. The base 2 is not exposed to the outside of the body and is relatively stable in connection with the skin, so there is no risk of being accidentally dragged out, which also significantly reduces the impact on the patient's life. In addition, the dialysis catheter can be injected with sterile liquid through the side hole 13, so that the catheter 1 will not be close to the superior vena cava, reducing the probability of thrombosis.

[0034] Furthermore, if Figure 3 As shown, the base 2 is a cap-shaped structure with one end open and the other end closed. The outer periphery of the open end is provided with an external thread, which can be connected with the silicone diaphragm. The puncture equipment such as the butterfly needle can pierce the silicone diaphragm and communicate with the inside of the base 2, so that the blood only flows out through the butterfly needle, the wound surface is small, and the operation is simple. In addition, after the dialysis is completed, after the butterfly needle is removed, the silicone diaphragm has a large elasticity, and the channel formed by the butterfly needle puncture can be closed under the action of its own elasticity, which reduces the patient's bleeding and recovery time, and reduces the patient's pain.

[0035] In some preferred embodiments of the present application, the side walls and end faces of the base 2 are arc-shaped structures, which can fit the skin completely and smoothly, reducing the risk of cutting tissues by the edge of the base 2.

[0036] In some specific embodiments of the present 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, and has excellent biocompatibility, mechanical properties and corrosion resistance, which not only ensures the stability of the support, but also extends the service life of the dialysis catheter.

[0037] In some other specific embodiments of the present application, the base 2 can also be made of fiber material, which has the characteristics of light weight and high strength, good biocompatibility, low cost, easy processing and molding, excellent X-ray transmittance, good conductivity and corrosion resistance.

[0038] Furthermore, a through hole aligned with the secondary conduit 12 is formed in the side wall of the base 2, and the base 2 forms a pipeline connected with the secondary conduit 12 through the through hole of the side wall. The base 2 is connected with the secondary conduit 12 by gluing, welding, setting a connecting structure, etc., and no matter what connection method is used, as long as a stable connection between the base 2 and the secondary conduit 12 can be achieved.

[0039] In some preferred embodiments of the present application, Figure 1 and Figure 2 As shown, in order to achieve a stable connection between the base 2 and the auxiliary conduit 12, the dialysis catheter also includes a locking mechanism 4 corresponding to the auxiliary conduit 12. A protrusion is provided on the outer side of the base 2. The protrusion is a tubular structure and extends into the proximal inner cavity of the auxiliary conduit 12. The locking mechanism 4 is sleeved on the outer periphery of the auxiliary conduit 12 and the protrusion. The locking mechanism 4 tightly connects the proximal end of the auxiliary conduit 12 with the protrusion to prevent the base 2 from escaping from the auxiliary conduit 12.

[0040] Specifically, the locking mechanism 4 extends along the longitudinal direction of the secondary guide tube 12 .

[0041] Furthermore, if Figure 4 As shown, the locking mechanism 4 includes a support ring 41 and a lock buckle 42. The support ring 41 can be wrapped to form a non-closed cylindrical structure. The lock buckle 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 and connected with the lock buckle 42. The support ring 41 is locked and connected with the secondary conduit 12 and the protruding part to achieve a tight connection.

[0042] In some preferred embodiments of the present application, the support ring 41 includes a support ring body 411 and an extension part 412, the width of the extension part 412 along the longitudinal extension direction of the secondary conduit 12 is smaller than the width of the support ring body 411 along the longitudinal extension direction of the secondary conduit 12, one end of the support ring body 411 along its wrapping direction is connected to the lock buckle 42, and the other end is connected to the extension part 412, and the other end of the extension part 412 is locked and connected to the lock buckle 42. On the one hand, the extension part 412 is locked and connected to the support ring body 411 through the lock buckle 42, so that the clamping effect is stable and reliable; on the other hand, the longitudinal unit coverage area of ​​the extension part 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 the present application, the number of the extension parts 412 is one or more, and the number of the extension parts 412 can be set based on actual needs.

[0044] In some preferred embodiments of the present application, the lock buckle 42 achieves a locking connection with the extension part 412 by sliding and biting the extension part 412 with a serrated structure, and the outer diameter of the cavity formed by the support ring 41 can be adjusted to adapt to and clamp the secondary conduits 12 with different outer diameters.

[0045] In some specific embodiments of the present 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, and has excellent biocompatibility, mechanical properties and corrosion resistance, which not only ensures the supporting stability of the connection between the secondary catheter 12 and the protrusion, but also prevents it from being dissolved in the body, thereby further extending the service life of the dialysis catheter.

[0046] In some preferred embodiments of the present application, Figure 1 and Figure 2 As shown, the dialysis catheter also includes a card symbol 3, which 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. Since the card symbol 3 is a foreign body relative to the clavicle, the clavicle will form a layer of tissue sheath to wrap the card symbol 3 through its own immune response, thereby fixing the position of the card symbol 3, and together with the base 2, ensure the connection stability of the dialysis catheter in the human body.

[0047] In some preferred embodiments of the present 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, and has excellent biocompatibility, mechanical properties and corrosion resistance, which not only ensures the supporting 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 the present application, the catheter 1 is made of at least one of silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene, and polytetrafluoroethylene. The catheters made of these materials have good adaptability and flexibility, can easily adapt to various bends and narrow passages in the human body, and can accurately reach the lesion site for precise treatment, thereby improving the success rate and safety of the operation, and can also reduce damage and irritation during the intubation process, thereby reducing the risk of infection and improving the treatment effect and safety of the patient.

[0049] In some preferred embodiments of the present application, since the catheter 1 is generally in a soft form, it is easy to bend and get stuck during the implantation process, which increases the difficulty of implantation. Figure 1 and Figure 2 As shown, the distal end of the catheter body 11 in the present application is a sharp bevel structure, and the distal end of the catheter 1 presents a gradually changing feature, so as to facilitate the catheter 1 to be more smoothly guided into the target position during the implantation process. In particular, when it is necessary to pass through a narrow or curved channel, it can reduce resistance and improve the success rate of insertion.

[0050] In some specific embodiments of the present application, the number of the secondary conduits 12 is two or three. When the number of the secondary conduits 12 is two, the two side holes 13 are connected to the patient's arterial blood vessels and venous blood vessels respectively, and are connected to the external hemodialysis machine through the base 2 and the puncture medical device, so as to form a blood circulation loop and complete the dialysis operation; when the number of the secondary conduits 12 is three, two of the side holes 13 are used to connect to the patient's arterial blood vessels and venous blood vessels respectively, and the last one is used for emergency treatment, such as through the built-in manipulation guide wire, it can be pushed to the superior vena cava of the heart, the inner cavity of the leg, etc., so as to achieve the treatment of other diseases of the patient while performing the dialysis operation. It is conceivable that the number of the secondary conduits 12 can also be set to four, five or more. In actual use, the number of the secondary conduits 12, the side holes 13, the base 2 and the locking mechanism 4 can be set accordingly based on actual needs.

[0051] like Figure 1 and Figure 2 As shown, the more the number of auxiliary catheters 12 is, the easier it is for the auxiliary catheters 12 to be tangled and for thrombus to be formed. Therefore, in some preferred embodiments of the present application, the number of auxiliary catheters 12 is two.

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

[0053] S1: implant the dialysis catheter into the body, connect the side holes 13 to the arteries and veins respectively, place the card 3 at the corresponding position of the clavicle, and place the base 2 under the skin;

[0054] S2: piercing the silicone diaphragm of the base 2 with a puncture device connected to an external hemodialysis machine;

[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 and when to remove it based on the patient's condition.

[0058] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A dialysis catheter, characterized in that: The catheter (1) comprises a catheter body (11) extending in the longitudinal direction, the catheter (1) comprising a catheter body (11) at the distal end and at least two auxiliary catheters (12) connected to the proximal end of the catheter body (11), the catheter body (11) being provided with inner cavities corresponding to the auxiliary catheters (12) respectively, and having side holes (13) corresponding to the distal ends of the plurality of inner cavities; It also comprises a base (2), the base (2) being connected to the proximal end of the secondary conduit (12) and communicating with the connected secondary conduit (12), the side wall and end face of the base (2) both being arc-shaped structures, and the base (2) being connected to an external hemodialysis machine.

2. A 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 cooperatively connected with the silicone diaphragm.

3. A dialysis catheter according to claim 1, characterized in that: The invention also comprises a locking mechanism (4) corresponding one-to-one with the secondary conduit (12); a protrusion is arranged on the outer side of the base (2); the protrusion is a tubular structure; the locking mechanism (4) is sleeved on the outer periphery of the secondary conduit (12) and the protrusion, and the secondary conduit (12) is tightly connected with the protrusion.

4. A dialysis catheter according to claim 3, characterized in that: The locking mechanism (4) comprises a supporting ring (41) and a locking buckle (42); the supporting ring (41) can be wrapped to form a non-closed cylindrical structure; the locking buckle (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 and connected to the locking buckle (42).

5. A dialysis catheter according to claim 4, characterized in that: The support ring (41) comprises a support ring body (411) and an expansion portion (412); one end of the support ring body (411) along its wrapping direction is connected to the lock buckle (42), and the other end is connected to the expansion portion (412); the other end of the expansion portion (412) is locked and connected to the lock buckle (42); The width of the expansion portion (412) along the longitudinal extension direction of the secondary conduit (12) is smaller than the width of the support ring body (411) along the longitudinal extension direction of the secondary conduit (12).

6. A dialysis catheter according to claim 1, characterized in that: It also comprises a card symbol (3), wherein 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.

7. A dialysis catheter according to claim 6, characterized in that: The card symbol (3) 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.

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

9. A dialysis catheter according to claim 1, characterized in that: The number of the secondary conduits (12) is two.

10. The dialysis catheter according to claim 1, characterized in that: The base (2) is made of at least one metal alloy selected from the group consisting of stainless steel, titanium alloy, cobalt-based alloy, nickel-titanium alloy and noble metal alloy.

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