Dialysis catheter changeover fitting

Abstract

The utility model discloses a dialysis catheter pipe changing joint, including flow divider, first catheter, second catheter and third catheter, and one end of first catheter and second catheter is communicated with one end of third catheter through flow divider, and the other end of first catheter is provided with the one-way valve for inserting the guide wire, and the other end of second catheter is provided with the second catheter joint for connecting the contrast injector, and third catheter is provided with the third catheter joint for connecting the cut -off mouth of built -in catheter. The dialysis catheter pipe changing joint of the utility model can carry out the contrast and the guide wire implantation in patient's body simultaneously, is convenient for the operation of physician, reduces the operation risk, improves medical safety, can further reduce the catheter infection probability in the pipe changing process, can reduce the blood loss of patient, improves the tolerance of patient operation and postoperative recovery time, also can improve the medical experience of patient, improves the satisfaction of patient.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary devices, and in particular to a dialysis catheter replacement connector. Background Technology

[0002] Semi-permanent dialysis catheters are the final vascular access for uremia patients to maintain life through maintenance hemodialysis. With the advancement of dialysis medical technology and standardized chronic management, the dialysis lifespan of uremia patients is gradually extending, with dialysis durations of 10+ years being common. The lifespan of a semi-permanent dialysis catheter is typically 2-3 years. Replacement with a new semi-permanent dialysis catheter is necessary due to catheter infection, catheter fibrosis leading to insufficient flow rate for dialysis, catheter dislodgement, and other related reasons.

[0003] Currently, there are two common methods for replacing semi-permanent dialysis catheters: One method involves sterilizing the external catheter (10), inserting a guidewire, removing the original semi-permanent dialysis catheter, and then inserting a new one. This method carries a high risk of catheter infection. During the replacement process, central venography is required to assess the superior vena cava, necessitating the removal of the catheter to the brachiocephalic vein and the guidewire (as there may not be enough guidewires available for replacement). In patients with near-occlusion of the superior vena cava after guidewire removal, guidewire re-insertion is difficult and may even fail, increasing the surgical complexity. The other method involves cutting the internal catheter (20) (cutting point 21), inserting a guidewire, removing the original semi-permanent dialysis catheter, and then inserting a new one. This method reduces the risk of infection, but because the original catheter cannot be sealed after cutting, it causes blood loss. During the replacement process, central venography is required to assess the superior vena cava, and the inability to seal the cut catheter leads to further blood loss. The second method is the more commonly used method for catheter replacement. Utility Model Content

[0004] The purpose of this invention is to provide a dialysis catheter replacement connector to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model discloses a dialysis catheter replacement connector, including a shunt, a first catheter, a second catheter, and a third catheter. One end of the first catheter and the second catheter are connected to one end of the third catheter through the shunt. The other end of the first catheter is provided with a one-way valve for inserting a guidewire. The other end of the second catheter is provided with a second catheter connector for connecting to an angiography injector. The third catheter is provided with a third catheter connector for connecting to the cut end of an internal catheter.

[0006] Furthermore, the second conduit is fitted with a snap fastener for closure.

[0007] Furthermore, the second conduit connector is a detachable nut.

[0008] Furthermore, the third conduit connector is a tapered plug that can be inserted into the cut end, and the outer diameter of the tapered plug gradually increases from the insertion end to the rear.

[0009] Furthermore, a snap-fit ​​protrusion is provided on the outer wall of the tapered connector.

[0010] Furthermore, the snap-fit ​​protrusions are evenly distributed in multiples along the axial direction of the tapered joint.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] This utility model of a dialysis catheter replacement connector allows for simultaneous angiography and guidewire placement in the patient, facilitating physician operation, reducing surgical risks, and improving medical safety. Furthermore, it reduces the chance of catheter infection during replacement; minimizes blood loss, improving patient tolerance to surgery and postoperative recovery time; and enhances the patient's overall experience and satisfaction.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the shear structure of a dialysis catheter;

[0016] Figure 2 This is a schematic diagram of a preferred embodiment of the dialysis catheter replacement connector disclosed in this utility model.

[0017] Legend:

[0018] 1. Diverter; 2. First conduit; 3. Second conduit; 4. Third conduit; 5. Check valve; 6. Second conduit connector; 7. Third conduit connector; 71. Snap-fit ​​ring; 8. Snap fastener; 10. External conduit; 20. Internal conduit; 21. Cut-off end. Detailed Implementation

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0020] like Figure 2As shown, this utility model discloses a dialysis catheter replacement connector, which includes a shunt 1, a first catheter 2, a second catheter 3, and a third catheter 4. One end of the first catheter 2 and the second catheter 3 are connected to one end of the third catheter 4 through the shunt 1. Specifically, the shunt 1 has a flow channel inside, thereby fixing one end of the first catheter 2, the second catheter 3, and the third catheter 4, and connecting the upper first catheter 2, the second catheter 3, and the lower third catheter 4. The other end of the first catheter 2 is provided with a one-way valve 5 (a commercially available structure) for inserting a guidewire. The other end of the second catheter 3 is provided with a second catheter connector 6 for connecting to an angiography syringe. The third catheter 4 is provided with a third catheter connector 7 for connecting to the cut end 21 of the built-in catheter 20. After the cut end 21 of the internal catheter 20 is cut, the dialysis catheter replacement connector is connected through the third catheter connector 7. This facilitates the insertion of the guidewire from the one-way valve 5 of the first catheter 2, and also facilitates the connection of a syringe for angiography through the second catheter connector 6. This simplifies the physician's operation, reduces surgical risks, and improves medical safety. Furthermore, it reduces the chance of catheter infection during catheter replacement; it reduces patient blood loss, improves patient tolerance to surgery and postoperative recovery time; and it also enhances the patient's medical experience and satisfaction. These multiple benefits facilitate its widespread application.

[0021] In this embodiment, the second catheter 3 is fitted with a snap fastener 8 for closure. The snap fastener 8 is a commercially available annular compression snap-fit ​​structure, which facilitates the closure of the second catheter 3 during the imaging process.

[0022] In this embodiment, in order to prevent contamination of the second catheter 3 and to facilitate quick connection of the syringe, the second catheter connector 6 is a detachable nut. The end of the second catheter 3 is provided with a hard external thread tube, so as to be spirally connected to the internal thread hole of the second catheter connector 6. The nut can be hung on the second catheter 3 by a connecting line to prevent the second catheter connector 6 from being easily lost after being rotated off.

[0023] In this embodiment, the third catheter connector 7 is a tapered plug that can be inserted into the cut-off opening 21, and the outer diameter of the tapered plug gradually increases from the insertion end to the rear. Therefore, as the tapered plug enters the third catheter 4 and expands outward, it can better conform to the inner wall of the cut-off opening 21, thereby completely sealing the cut-off opening 21 and preventing blood loss.

[0024] In this embodiment, to further improve the sealing effect, a snap-fit ​​protrusion 71 is provided on the outer wall of the tapered joint. Multiple snap-fit ​​protrusions 71 are evenly distributed along the axial direction of the tapered joint. The snap-fit ​​protrusions 71 can better prevent the third conduit joint 7 from detaching from the inner hole of the shearing port 21, thereby improving the connection and sealing effect.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dialysis catheter replacement connector, characterized in that, The device includes a shunt (1), a first catheter (2), a second catheter (3), and a third catheter (4). One end of the first catheter (2) and the second catheter (3) are connected to one end of the third catheter (4) through the shunt (1). The other end of the first catheter (2) is provided with a one-way valve (5) for inserting a guidewire. The other end of the second catheter (3) is provided with a second catheter connector (6) for connecting to a contrast injector. The third catheter (4) is provided with a third catheter connector (7) for connecting to the cut end (21) of the internal catheter (20). The third catheter connector (7) is a conical plug that can be inserted into the cut end (21). The outer diameter of the conical plug gradually increases from the insertion end to the rear. A snap-fit ​​protrusion (71) is provided on the outer wall of the conical plug. Multiple snap-fit ​​protrusions (71) are evenly distributed along the axial direction of the conical plug.

2. The dialysis catheter replacement connector according to claim 1, characterized in that, The second conduit (3) is fitted with a snap fastener (8) for closure.

3. The dialysis catheter replacement connector according to claim 1, characterized in that, The second conduit connector (6) is a detachable nut.

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