Puncture catheter for kidney replacement therapy
By introducing an attachment and positioning guidewire into the puncture catheter for renal replacement therapy, the problem of difficulty in judging catheter blockage is solved, rapid diagnosis and treatment plan adjustment are achieved, and patient risks and medical costs are reduced.
Patent Information
- Application Number
- CN202422448616.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-10
AI Technical Summary
During the current renal replacement therapy process, puncture catheters are prone to poor blood flow due to thrombosis or fibrous substances, causing frequent machine alarms, making it difficult to quickly identify catheter problems, and increasing patient risks and medical costs.
An attached tube body is designed for the inlet and return vessels, and a positioning guide wire and an observation position are provided inside the attached tube body. By observing the movement of the guide wire, it can be directly judged whether there is a thrombus or fibrous material blocking the catheter.
It can quickly identify catheter blockage problems, adjust treatment plans in a timely manner, and reduce unnecessary puncture operations and medical costs for patients.
Smart Images
Figure CN223392516U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of puncture catheters, in particular to a puncture catheter for renal replacement therapy. Background Art
[0002] Renal replacement therapy is a treatment method for patients with uremia or renal failure, aimed at helping to excrete metabolic waste from the body and improve clinical symptoms. Its main purpose is to maintain the patient's water, electrolyte and acid-base balance, prevent the occurrence of complications, and improve the patient's quality of life.
[0003] Renal replacement therapy uses hemodialysis to establish extracorporeal circulation, drawing blood from the body, purifying it through a dialyzer, and then returning it to the body. In this process, a puncture catheter plays a crucial connecting role. Specifically, the puncture catheter accurately penetrates the patient's blood vessels (such as the femoral vein), establishing a pathway for extracorporeal blood circulation and allowing blood to be smoothly drawn out of the body. During hemodialysis, the puncture catheter ensures smooth blood flow within the dialyzer, allowing for sufficient material exchange with the dialysate, thereby removing metabolic waste and excess water from the body.
[0004] For example, the puncture tube disclosed in publication number CN118383844A includes a blood inlet tube and a return tube. A side hole is provided on the side wall of the blood inlet end of the blood inlet tube, and the side hole of the blood inlet tube is used to introduce blood into the central vein. A main hole is provided on the blood return end of the return tube, and the main hole of the return tube is used to return the purified blood to the central vein.
[0005] However, due to the patient's underlying diseases (such as liver disease with abnormal coagulation function, poor vascular conditions), improper catheterization techniques and the use of anticoagulants, it is easy for thrombus or fibrous material to form in the side hole of the blood inlet end or the main hole of the blood return end, causing blood flow obstruction during renal replacement therapy. Usually this situation will be indirectly reflected in the parameters of the hemodialysis machine, causing extreme parameters and causing the machine to constantly alarm and frequently interrupt treatment, resulting in reduced efficacy. However, it is impossible to quickly and directly determine whether it is a problem with the catheter itself or the hemodialysis line. It is necessary to interrupt renal replacement therapy and replace the catheter or replace the hemodialysis line. This will increase the risk of frequent central venous puncture operations and medical treatment costs for patients. Utility Model Content
[0006] The purpose of the utility model is to address the deficiencies in the existing technology and provide a puncture catheter for renal replacement therapy. When the machine frequently alarms during renal replacement therapy or when routine maintenance of the catheter is performed, it can quickly and directly determine whether a thrombus or other fibrous material is formed in the catheter, causing blockage of the catheter side hole or main hole.
[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:
[0008] A puncture catheter for renal replacement therapy, comprising:
[0009] A blood drainage tube, comprising a main blood drainage body and a blood drainage attachment body, wherein the blood drainage attachment body is located inside the main blood drainage body and connected to the inner wall of the main blood drainage body, the main blood drainage body having a blood drainage end and a blood drainage exposed end, the side wall of the blood drainage end being provided with a side hole, the blood drainage attachment body being provided with a blood drainage opening, and the blood drainage opening being exposed on the side hole;
[0010] A return blood vessel, comprising a blood return main body and a blood return attachment body, wherein the blood return attachment body is located inside the blood return main body and connected to the inner wall of the blood return main body, the blood return main body having a blood return end and a blood return exposed end, wherein the blood return end is provided with a main hole, and the blood return attachment body is provided with a blood return opening, wherein the blood return opening is exposed on the blood return end;
[0011] a first positioning guide wire, the first positioning guide wire being located in the blood guide tube;
[0012] A second positioning guide wire is located in the blood return attachment tube.
[0013] As a preferred embodiment, the inner end of the blood-drawing tube body is opposite to the blood-drawing end, and the inner end of the blood-drawing tube body is located between the top of the side hole and the bottom of the side hole. The distance between the top of the side hole and the bottom of the side hole defines the length of the side hole, and the length of the blood-drawing opening is defined between the top of the side hole and the inner end of the blood-drawing tube body.
[0014] As a preferred embodiment, the outer end of the blood-drawing attachment tube body is opposite to the exposed blood-drawing end, the outer end of the blood-drawing attachment tube body is closed, and the part of the blood-drawing main body close to the exposed blood-drawing end is provided with a first observation position corresponding to the movement of the first positioning guide wire to observe the displacement of the first positioning guide wire in the blood-drawing attachment tube body.
[0015] As a preferred embodiment, the tail of the first positioning guidewire is L-shaped, and a first anchoring structure for fixing the tail end of the first positioning guidewire is provided inside the first observation position. The first anchoring structure is protruding and can be buckled with the tail of the first positioning guidewire.
[0016] As a preferred embodiment, the inner end of the blood return attachment tube body faces the blood return end, and a blood return opening is provided at the inner end of the blood return attachment tube body.
[0017] As a preferred embodiment, the outer end of the blood return attachment tube body is opposite to the blood return exposed end, the outer end of the blood return attachment tube body is closed, and the part of the blood return main body close to the blood return exposed end is provided with a second observation position corresponding to the movement of the second positioning guide wire to observe the displacement of the second positioning guide wire in the blood return attachment tube body.
[0018] As a preferred embodiment, the tail of the second positioning guide wire is L-shaped, and a second anchoring structure for fixing the tail end of the second positioning guide wire is provided inside the second observation position. The second anchoring structure is protruding and can be buckled with the tail of the second positioning guide wire.
[0019] As a preferred embodiment, the inner side of the blood introduction main body and the inner side of the blood return main body are connected.
[0020] As a preferred embodiment, the blood-drawing attachment tube is located outside the blood-drawing main tube;
[0021] The blood return attachment tube is located outside the blood return main tube.
[0022] As a preferred embodiment, the blood introduction end of the blood introduction main body and the blood return end of the blood return main body face each other, and the two are connected to form the tip of the puncture catheter.
[0023] Compared with the existing technology, this technical solution has the following advantages:
[0024] Since the blood introduction opening is exposed on the side hole, if a thrombus or fibrous material is formed in the side hole, it will drive the first positioning guide wire in the blood introduction attachment tube to move. At this time, the tail of the first positioning guide wire in the blood introduction attachment tube can be checked through the blood introduction exposed end of the blood introduction main body. Similarly, the tail of the second positioning guide wire in the blood return attachment tube can be checked through the blood return exposed end of the blood return main body. This can directly determine whether there is a problem with the catheter itself, which helps to stop replacing the pipeline, stop renal replacement therapy, or adjust the dosage of anticoagulants in time to ensure the treatment effect.
[0025] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic structural diagram of the puncture catheter for renal replacement therapy according to the present invention;
[0027] Figure 2 for Figure 1 A is an enlarged schematic diagram.
[0028] In the figure: 100 blood vessel, 110 blood drawing main body, 111 blood drawing end, 112 blood drawing exposed end, 113 side hole, 113a side hole top, 113b side hole bottom, 114 first observation position, 114a first anchoring structure, 120 blood drawing attached tube body, 123 blood drawing opening, 200 return blood vessel, 210 blood return main body, 211 blood return end, 212 blood return exposed end, 213 main hole, 214 second observation position, 214a second anchoring structure, 220 blood return attached tube body, 223 blood return opening, 300 first positioning guide wire, 400 second positioning guide wire. DETAILED DESCRIPTION
[0029] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.
[0030] like Figure 1 and Figure 2 As shown, the renal replacement therapy puncture catheter includes:
[0031] A blood drainage tube 100 includes a main blood drainage body 110 and a blood drainage attachment body 120. The blood drainage attachment body 120 is located inside the main blood drainage body 110 and connected to the inner wall of the main blood drainage body 110. The main blood drainage body 110 has a blood drainage end 111 and a blood drainage exposed end 112. A side hole 113 is formed in the side wall of the blood drainage end 111. The blood drainage attachment body 120 has a blood drainage opening 123, which is exposed on the side hole 113.
[0032] The blood return tube 200 includes a blood return main body 210 and a blood return attachment tube 220. The blood return attachment tube 220 is located inside the blood return main body 210 and connected to the inner wall of the blood return main body 210. The blood return main body 210 has a blood return end 211 and a blood return exposed end 212. The blood return end 211 has a main hole 213. The blood return attachment tube 220 has a blood return opening 223, which is exposed on the blood return end 211.
[0033] A first positioning guide wire 300 , which is located in the blood-drawing tube body 120 ;
[0034] The second positioning guide wire 400 is located in the blood return tube body 220 .
[0035] The blood inlet end 111 of the blood inlet main body 110 and the blood return end 211 of the blood return main body 210 face each other and are connected to form the tip of a puncture catheter for puncturing a blood vessel. The blood inlet exposed end 112 of the blood inlet main body 110 and the blood return exposed end 212 of the blood return main body 210 are located outside the body cavity, separated, and used to connect to a dialyzer, etc. Since the blood introduction opening 123 is exposed on the side hole 113, if a thrombus or fibrous material is formed in the side hole 113, it will drive the first positioning guide wire 300 in the blood introduction tube body 120 to move. At this time, the tail of the first positioning guide wire 300 in the blood introduction tube body 120 can be checked through the blood introduction exposed end 112 of the blood introduction main body 110. Similarly, the tail of the second positioning guide wire 400 in the blood return tube body 220 can be checked through the blood return exposed end 212 of the blood return main body 210. This can directly determine whether there is a problem with the catheter itself, which helps to stop replacing the pipeline, stop renal replacement therapy, or adjust the dosage of anticoagulants in time to ensure the treatment effect.
[0036] like Figure 1 and Figure 2 As shown, the inner end of the blood-drawing tube body 120 is opposite to the blood-drawing end 111, and the inner end of the blood-drawing tube body 120 is located between the side hole top 113a and the side hole bottom 113b of the side hole 113. The distance between the side hole top 113a and the side hole bottom 113b defines the length of the side hole 113, and the distance between the side hole top 113a and the inner end of the blood-drawing tube body 120 defines the length of the blood-drawing opening 123.
[0037] There is a distance between the inner end of the blood-drawing attachment tube body 120 and the blood-drawing end 111. The distance between the side hole top 113a and the side hole bottom 113b defines the length of the side hole 113. The distance between the side hole top 113a and the inner end of the blood-drawing attachment tube body 120 defines the length of the blood-drawing opening 123, that is, the blood-drawing opening 123 is exposed on the side hole 113. Thus, when the blood pressure of the central vein is drawn out through the side hole 113 and the main blood-drawing body 110, if a thrombus or fibrous material blocks the side hole 113, it will simultaneously adhere to the head of the first positioning guide wire 300, so that under the action of gravity, the first positioning guide wire 300 moves downward as a whole. At this time, by observing the tail of the first positioning guide wire 300, it can be determined whether there is a problem with the corresponding blood-drawing tube 100 of the catheter itself.
[0038] Furthermore, the outer end of the blood-drawing attached tube body 120 is opposite to the blood-drawing exposed end 112, and the outer end of the blood-drawing attached tube body 120 is closed. The part of the blood-drawing main body 110 close to the blood-drawing exposed end 112 is provided with a first observation position 114 corresponding to the movement of the first positioning guide wire 300 to observe the displacement of the first positioning guide wire 300 in the blood-drawing attached tube body 120.
[0039] The outer end of the blood guide tube body 120 and the first observation position 114 are located outside the body cavity, wherein the first observation position 114 is made of a transparent material, or the entire blood guide tube 100 is made of a transparent material, so the tail end of the first positioning guide wire 300 can be viewed through the first observation position 114.
[0040] Furthermore, there is a small gap between the head of the first positioning guide wire 300 and the inner end of the blood guide tube body 120, which allows thrombus or fibrous material to adhere to the head of the first positioning guide wire 300 and enables the first positioning guide wire 300 to move downward.
[0041] The tail of the first positioning guide wire 300 is L-shaped, and a first anchoring structure 114 a is provided inside the first observation position 114 . The first anchoring structure 114 a can be buckled with the tail of the first positioning guide wire 300 .
[0042] When thrombus or fibrous tissue is attached to the head of the first positioning guidewire 300 and gradually increases, the first positioning guidewire 300 will gradually move downward. At this time, the tail of the first positioning guidewire 300 moves down to the first observation position 114, which directly determines that there is a problem with the catheter itself.
[0043] In addition, the first anchoring structure 114a can support the tail of the first positioning guide wire 300 to prevent the first positioning guide wire 300 from moving further downward. The first anchoring structure 114a can be square, round, etc.
[0044] like Figure 1 As shown, the purified blood passes through the blood return main body 210 until it is introduced into the patient's central vein through the main hole 213 of the blood return end 211.
[0045] The design of the blood return tube body 220 is substantially the same as that of the blood induction tube body 120. The inner end of the blood return tube body 220 faces the blood return end 211, and the two can overlap. The inner end of the blood return tube body 220 is provided with a blood return opening 223, which is adjacent to the main hole 213. In this way, when there is a thrombus or excessive fibrous tissue, it will not only block the main hole 213, but also adhere to the head of the second positioning guide wire 400 at the blood return opening 223, driving the second positioning guide wire 400 to be drawn. By observing the condition of the tail of the second positioning guide wire 400, it can be determined whether there is a problem with the return blood vessel 200 corresponding to the catheter itself.
[0046] Furthermore, the outer end of the blood return tube body 220 is opposite to the blood return exposed end 212, and the outer end of the blood return tube body 220 is closed. The part of the blood return main body 210 close to the blood return exposed end 212 is provided with a second observation position 214 corresponding to the movement of the second positioning guide wire 400 to observe the displacement of the second positioning guide wire 400 in the blood return tube body 220.
[0047] The second observation position 214, or the return blood vessel 200 as a whole is made of transparent material, and the second observation position 214 can be used to observe whether the tail of the second positioning guide wire 400 falls into the second observation position 214. If so, there is a problem with the return blood vessel 200.
[0048] Furthermore, the tail of the second positioning guide wire 400 is L-shaped, and a second anchoring structure 214a for fixing the tail end of the second positioning guide wire 400 is provided inside the second observation position 214. The second anchoring structure 214a is protruding, and the second anchoring structure 214a can be buckled with the tail of the second positioning guide wire 400.
[0049] The second anchoring structure 214a may be circular or square, etc., and is used to abut against the tail of the second positioning guide wire 400 to prevent the tail of the second positioning guide wire 400 from continuing to move downward, thereby preventing it from sliding into the blood vessel.
[0050] refer to Figure 1 Since the second positioning guide wire 400 has a smaller diameter, the second positioning guide wire 400 can be adapted to deformation and accommodated in the blood return tube body 220 , and the head of the second positioning guide wire 400 can move downward after thrombus or fibrous material is attached.
[0051] like Figure 1 As shown, the inner side of the blood introduction main body 110 and the inner side of the blood return main body 210 are connected.
[0052] The blood-introduction end 111 of the blood-introduction main body 110 and the blood-returning end 211 of the blood-returning main body 210 face each other and are connected to form the tip of a puncture catheter for puncturing a blood vessel. The exposed blood-introduction end 112 of the blood-introduction main body 110 and the exposed blood-returning end 212 of the blood-returning main body 210 are separated and used to connect to a dialyzer, etc. Except for the separation of the exposed blood-introduction end 112 and the exposed blood-returning end 212, the other locations of the blood-introduction main body 110 and the blood-returning main body 210 are connected.
[0053] refer to Figure 1 The blood-introduction attachment tube 120 is located outside the blood-introduction main tube 110 ; the blood-return attachment tube 220 is located outside the blood-return main tube 210 .
[0054] To sum up, since the blood introduction opening 123 is exposed on the side hole 113, if a thrombus or fibrous material is formed in the side hole 113, it will drive the first positioning guide wire 300 in the blood introduction tube body 120 to move. At this time, the tail of the first positioning guide wire 300 in the blood introduction tube body 120 can be checked through the blood introduction exposed end 112 of the blood introduction main body 110. Similarly, the tail of the second positioning guide wire 400 in the blood return tube body 220 can be checked through the blood return exposed end 212 of the blood return main body 210. This can directly determine whether there is a problem with the catheter itself, which helps to stop replacing the pipeline, stop renal replacement therapy, or adjust the dosage of anticoagulants in time to ensure the treatment effect.
[0055] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The scope of patent application of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.
Claims
1. A puncture catheter for renal replacement therapy, characterized in that: include: A blood drainage tube (100), the blood drainage tube (100) comprising a main blood drainage body (110) and a blood drainage attachment body (120), the blood drainage attachment body (120) being located inside the main blood drainage body (110), the blood drainage attachment body (120) being connected to the inner wall of the main blood drainage body (110), the main blood drainage body (110) having a blood drainage end (111) and a blood drainage exposed end (112), the side wall of the blood drainage end (111) being provided with a side hole (113), the blood drainage attachment body (120) being provided with a blood drainage opening (123), the blood drainage opening (123) being exposed on the side hole (113); A blood return blood vessel (200), comprising a blood return main body (210) and a blood return attachment body (220), wherein the blood return attachment body (220) is located inside the blood return main body (210) and connected to the inner wall of the blood return main body (210), wherein the blood return main body (210) has a blood return end (211) and a blood return exposed end (212), wherein the blood return end (211) is provided with a main hole (213), and the blood return attachment body (220) is provided with a blood return opening (223), wherein the blood return opening (223) is exposed on the blood return end (211); a first positioning guide wire (300), the first positioning guide wire (300) being located inside the blood-drawing tube body (120); A second positioning guide wire (400), the second positioning guide wire (400) is located in the blood return tube body (220).
2. The puncture catheter for renal replacement therapy according to claim 1, characterized in that: The inner end of the blood-drawing tube body (120) faces the blood-drawing end (111), and the inner end of the blood-drawing tube body (120) is located between the side hole top (113a) and the side hole bottom (113b) of the side hole (113). The distance between the side hole top (113a) and the side hole bottom (113b) defines the length of the side hole (113), and the distance between the side hole top (113a) and the inner end of the blood-drawing tube body (120) defines the length of the blood-drawing opening (123).
3. The puncture catheter for renal replacement therapy according to claim 2, characterized in that: The outer end of the blood-drawing attached tube body (120) faces the exposed blood-drawing end (112), and the outer end of the blood-drawing attached tube body (120) is closed. The portion of the blood-drawing main tube body (110) close to the exposed blood-drawing end (112) is provided with a first observation position (114) corresponding to the movement of the first positioning guide wire (300) to observe the displacement of the first positioning guide wire (300) in the blood-drawing attached tube body (120).
4. The puncture catheter for renal replacement therapy according to claim 3, characterized in that: The tail of the first positioning guide wire (300) is L-shaped, and a first anchoring structure (114a) for fixing the tail end of the first positioning guide wire (300) is provided inside the first observation position (114). The first anchoring structure (114a) is protruding and can be buckled with the tail of the first positioning guide wire (300).
5. The puncture catheter for renal replacement therapy according to claim 1, characterized in that: The inner end of the blood return attachment tube body (220) faces the blood return end (211), and a blood return opening (223) is provided at the inner end of the blood return attachment tube body (220).
6. The puncture catheter for renal replacement therapy according to claim 5, characterized in that: The outer end of the blood return tube body (220) faces the blood return exposed end (212), and the outer end of the blood return tube body (220) is closed. The part of the blood return main body (210) close to the blood return exposed end (212) is provided with a second observation position (214) corresponding to the movement of the second positioning guide wire (400) to observe the displacement of the second positioning guide wire (400) in the blood return tube body (220).
7. The puncture catheter for renal replacement therapy according to claim 6, characterized in that: The tail of the second positioning guide wire (400) is L-shaped, and a second anchoring structure (214a) for fixing the tail end of the second positioning guide wire (400) is provided inside the second observation position (214). The second anchoring structure (214a) is protruding, and the second anchoring structure (214a) can be buckled with the tail of the second positioning guide wire (400).
8. The puncture catheter for renal replacement therapy according to claim 1, characterized in that: The inner side of the blood introduction main body (110) and the inner side of the blood return main body (210) are connected.
9. The puncture catheter for renal replacement therapy according to claim 8, characterized in that: The blood-drawing attachment tube (120) is located outside the blood-drawing main tube (110); The blood return attachment tube (220) is located outside the blood return main tube (210).
10. The puncture catheter for renal replacement therapy according to claim 1, characterized in that: The blood introduction end (111) of the blood introduction main body (110) and the blood return end (211) of the blood return main body (210) face each other, and the two are connected to form the tip of the puncture catheter.
Citation Information
Patent Citations
Puncture tube and thrombus inspection method
CN118383844A