A hemodialysis catheter

Abstract

The utility model discloses a kind of hemodialysis catheters, including main catheter, two independent lumen are provided in the main catheter, the end of two lumen is respectively provided with arterial port and venous port;The other end of the main catheter is connected with the extension tube that is communicated with two lumen respectively, two The extension tube is all provided with stop clamp, and end portion is connected with luer joint, the main catheter is provided with suture wing;The side wall of the lumen where arterial port is located has blood introduction groove that is folded and is formed inwardly recessed, the blood introduction groove is located in the one end of the main catheter close to arterial port, and it extends to arterial port along the length direction of the main catheter;The blood introduction groove has blood return hole that is communicated with corresponding lumen.The utility model has the advantages of reasonable structure design, can alleviate the phenomenon of adhering to wall, is conducive to reducing manpower and material resources.

Description

Technical Field

[0001] This utility model relates to the field of dialysis technology, and in particular to a hemodialysis catheter. Background Technology

[0002] Hemodialysis is a common form of renal replacement therapy. During hemodialysis, the patient's blood is drained out of the body through a puncture needle or catheter and then connected to the dialyzer via blood tubing. After the blood exchanges substances with the dialysate through the dialyzer, it is drained back into the body via blood tubing (including the venous chamber).

[0003] Hemodialysis catheters are commonly used in hemodialysis. These catheters are divided into separate venous and arterial cavities by a septum. A posterior return port and a stenosis port are located at the tips of the venous and arterial cavities, respectively. During clinical treatment, the stenosis port can easily suck against the vessel wall during blood draw, causing the vessel wall to adhere to the port. This adhesion phenomenon affects the smooth flow of blood, easily leading to equipment shutdown. Consequently, patients require constant monitoring and frequent start-up and shutdown of the equipment by dedicated personnel, wasting manpower, resources, and treatment time, and also impacting the effectiveness of hemodialysis. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a hemodialysis catheter with a reasonable structural design that can alleviate the wall adhesion phenomenon and help reduce manpower and material resources.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A hemodialysis catheter includes a main tube containing two independent lumens, with an arterial orifice and a venous orifice at the ends of the two lumens, respectively. The other end of the main tube is connected to an extension tube communicating with each of the two lumens. Both extension tubes are equipped with a stop clamp and have Luer connectors at their ends. The main tube has a suture wing. A folded, inwardly recessed blood drainage groove is located on the side wall of the lumen containing the arterial orifice. The blood drainage groove is located at the end of the main tube near the arterial orifice and extends along the length of the main tube to the arterial orifice. The blood drainage groove has a return blood port communicating with the corresponding lumen.

[0007] In the above structure, an inwardly folded blood-draining groove is provided on the lumen where the arterial orifice is located, extending to the arterial orifice. This allows for more open space between the blood-draining groove and the vessel wall, significantly reducing the probability of the vessel wall adhering to and covering the blood-draining groove and the arterial orifice, thus mitigating the adhesion phenomenon. As long as there is a blood return space at any point in the blood-draining groove, blood can enter the lumen through the blood return hole within the blood-draining groove, thereby ensuring unobstructed blood flow.

[0008] Furthermore, the inner lumen of the main tube is divided into an arterial lumen and a venous lumen by a partition extending along the length direction, with the arterial orifice and venous orifice located at the ends of the arterial lumen and venous lumen, respectively; the tube wall end at the arterial orifice has a cut, and the projection of the cut in the radial direction of the main tube is arc-shaped.

[0009] In this way, by setting an arc-shaped incision at the end of the arterial orifice, the arterial orifice can have an irregular cross-section, thereby reducing the risk of occlusion due to adhesion to the wall and ensuring smooth blood extraction from the arterial orifice.

[0010] Furthermore, the end of the blood drainage groove is located within the incision.

[0011] This allows the end of the blood collection channel to be located closer to the inside of the arterial lumen, reducing the risk of blockage due to adhesion to the arterial wall and ensuring that blood can smoothly enter the blood collection channel.

[0012] Furthermore, two blood drainage channels are provided along the circumference of the main guide tube.

[0013] Furthermore, the blood return hole is located at the bottom and / or on the side wall of the blood drainage groove.

[0014] Furthermore, the blood return hole is located at the junction of the blood drainage groove and the tube wall.

[0015] Furthermore, multiple blood return holes are distributed along the length of the blood drainage groove.

[0016] Furthermore, the venous orifice is located at the end of the main tube, and the distance between the arterial orifice and the venous orifice is 60mm to 90mm.

[0017] In summary, this utility model has the advantages of reasonable structural design, which can alleviate the wall adhesion phenomenon and reduce manpower and material resources. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0019] Figure 2 for Figure 1 A partially enlarged structural diagram.

[0020] Figure 3 This is a schematic diagram of the structure of the arterial and venous orifices.

[0021] Figure 4 This is a schematic diagram of the local structure at the artery orifice viewed from above. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments.

[0023] In practical implementation: such as Figures 1-4 As shown, a hemodialysis catheter includes a main tube 1, which has two independent lumens. The ends of the two lumens are respectively provided with an arterial port 15 and a venous port 16. The other end of the main tube 1 is connected to an extension tube 2, which communicates with the two lumens respectively. Each of the two extension tubes 2 is provided with a stop clip 3 and a Luer connector 4 is connected to its end. The main tube 1 is provided with a suture wing 5. The side wall of the lumen where the arterial port 15 is located has a folded, inwardly recessed blood drainage groove 11. The blood drainage groove 11 is located at the end of the main tube 1 near the arterial port 15 and extends along the length of the main tube 1 to the arterial port 15. The blood drainage groove 11 has a blood return hole 12 communicating with the corresponding lumen.

[0024] like Figure 3 As shown, the inner lumen of the main tube 1 is divided into an arterial lumen and a venous lumen by a partition 13 extending along its length. The arterial orifice 15 and the venous orifice are located at the ends of the arterial and venous lumen, respectively. The venous orifice is located at the end of the main tube 1, and the distance between the arterial orifice 15 and the venous orifice is 60mm to 90mm. The end of the tube wall at the arterial orifice 15 has a cut 14, and the radial projection of the cut 14 on the main tube 1 is arc-shaped. The end of the blood collection groove 11 is located within the cut 14. This design allows the end of the blood collection groove to be located closer to the arterial lumen, reducing the risk of occlusion and ensuring smooth blood flow into the groove. Furthermore, it allows the arterial orifice 15 to have an irregular cross-section, further reducing the risk of occlusion and facilitating successful blood draw from the arterial orifice 15.

[0025] In this embodiment, as Figure 3 and Figure 4 As shown, the blood drainage groove 11 is provided with one channel, and the blood drainage groove 11 has multiple blood return holes 12 distributed along its length. The blood return holes 12 are distributed on the bottom and side walls of the blood drainage groove 11, as well as at the junction of the blood drainage groove 11 and the tube wall. This can further reduce the risk of the blood return holes 12 being completely blocked by the wall, thereby alleviating the wall-blocking phenomenon. In specific implementations, two or more blood drainage grooves 11 can also be provided in the circumferential direction of the main tube 1.

[0026] In this embodiment, the hemodialysis catheter features an inwardly folded blood-draining groove on the lumen where the arterial orifice 15 is located, extending to the arterial orifice 15. This provides more open space between the blood-draining groove and the vessel wall, significantly reducing the probability of the vessel wall adhering to and covering the blood-draining groove and the arterial orifice 15, thus mitigating the adhesion phenomenon. As long as there is a return space at any point in the blood-draining groove, blood can enter the lumen through the return hole within the groove, ensuring unobstructed blood flow. Furthermore, the inwardly folded and concave shape of the blood-draining groove creates a rib-like structure on its sidewalls, enhancing the strength of the main catheter end and reducing the risk of catheter folding and blockage, further ensuring smooth blood draw.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hemodialysis catheter, characterized in that, The device includes a main tube (1), which has two independent lumens, with an arterial orifice and a venous orifice at the ends of the two lumens respectively; the other end of the main tube (1) is connected to an extension tube (2) that communicates with the two lumens respectively, and both extension tubes (2) are provided with a stop clip (3) and a Luer connector (4) at their ends; the main tube (1) is provided with a suture wing (5); the device is characterized in that the side wall of the lumen where the arterial orifice is located has a blood drainage groove (11) that is folded inward and recessed, the blood drainage groove (11) is located at the end of the main tube (1) near the arterial orifice and extends along the length of the main tube (1) to the arterial orifice; the blood drainage groove (11) has a blood return hole (12) that communicates with the corresponding lumen.

2. The hemodialysis catheter as described in claim 1, characterized in that, The inner lumen of the main tube (1) is divided into an arterial lumen and a venous lumen by a partition (13) extending along the length direction. The arterial orifice and the venous orifice are located at the ends of the arterial lumen and the venous lumen, respectively. The end of the tube wall at the arterial orifice has a cut (14), and the projection of the cut (14) in the radial direction of the main tube (1) is arc-shaped.

3. The hemodialysis catheter as described in claim 2, characterized in that, The end of the blood channel (11) is located inside the incision (14).

4. The hemodialysis catheter as described in claim 1, characterized in that, Two blood collection channels (11) are provided along the circumference of the main tube (1).

5. The hemodialysis catheter as described in claim 1, characterized in that, The blood return hole (12) is located at the bottom and / or side wall of the blood channel (11).

6. The hemodialysis catheter as described in claim 5, characterized in that, The blood return hole (12) is located at the junction of the blood channel (11) and the tube wall.

7. The hemodialysis catheter as described in claim 5 or 6, characterized in that, Multiple blood return holes (12) are distributed along the length of the blood guide groove (11).

8. The hemodialysis catheter as described in claim 1, characterized in that, The venous orifice is located at the end of the main tube (1), and the distance between the arterial orifice and the venous orifice is 60mm to 90mm.

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