Temporary dialysis catheter

Abstract

The utility model discloses a kind of temporary dialysis catheter, including main pipe, two independent pipe cavities are arranged in the main pipe, the end of two pipe cavities is respectively provided with arterial orifice and venous orifice;The other end of the main pipe is connected with the extension pipe communicated with two pipe cavities respectively, two The extension pipe is all provided with stop clamp, and end portion is connected with luer joint, suture wing is provided on the main pipe;The suture wing includes fixed seat, the fixed seat has the fixed hole being arranged through, the diameter of the fixed hole is matched with the outer diameter of the main pipe, and can be axially movably set on the main pipe;The fixed seat has wing plate, which is arranged to extend to both sides along the tangent direction of the fixed hole, the suture hole is arranged through on the wing plate;The fixed seat has locking mechanism for holding the main pipe. The utility model has the advantages of clever structure design, can be sutured and fixed according to puncture hole position, good adaptability, high catheter stability and the like.

Description

Technical Field

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

[0002] A temporary dialysis catheter is a key device for short-term blood purification therapy. It is typically made of highly biocompatible materials (such as medical-grade polyurethane or silicone), with a flexible body and a wide lumen (double-lumen structure) to meet the high flow rate required for hemodialysis. These catheters are designed to provide emergency vascular access for patients in the transitional phase of acute kidney injury (AKI), drug poisoning, or chronic renal failure, and are particularly suitable for clinical scenarios where arteriovenous fistulas or long-term catheters cannot be immediately established.

[0003] The fixation of temporary dialysis catheters relies on surgical suturing techniques, the core purpose of which is to prevent catheter displacement or accidental dislodgement. Catheters are typically designed with suture wings (fixation wings) or suture holes. During the procedure, after insertion, the catheter is directly sutured to the patient's skin through the suture wings. After suturing, a sterile transparent dressing is applied to further restrict catheter movement. Currently, the suture wings on temporary dialysis catheters are fixed in place. However, due to patient height and body size limitations, the insertion depth of temporary dialysis catheters is often shallow in some patients. This causes the fixed suture wings to be far from the puncture hole, making the catheter between the suture wings and the puncture hole susceptible to movement under external force. This affects the fixation effectiveness and stability of the catheter, and may even affect the dialysis flow rate. 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 temporary dialysis catheter with a clever structural design that can be sutured and fixed according to the puncture hole position, with good adaptability and high placement stability.

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

[0006] A temporary dialysis catheter includes a main tube containing two independent lumens, each with an arterial orifice and a venous orifice at its end. The other end of the main tube is connected to extension tubes communicating with the two lumens. Each extension tube has a stop clamp and a Luer connector at its end. The main tube has suture wings. Each suture wing includes a fixing seat with a through-hole whose diameter matches the outer diameter of the main tube and is axially movable on the main tube. The fixing seat has wing plates extending laterally along the tangent of the fixing hole, each wing plate having a through-hole for suturing. The fixing seat also has a locking mechanism for holding the main tube securely.

[0007] In the above structure, the fixation seat is fitted onto the main tube through a fixing hole and can move along the main tube. Once the main tube is in place, the fixation seat can be moved along the main tube to the vicinity of the puncture hole. The locking mechanism is then used to hold the main tube in place, fixing the fixation seat to the main tube. Finally, the suture hole is used to suture the wing plate to the skin for fixation. Because the suture wing is located at the puncture hole, the stability of the catheter insertion is higher. This structure is suitable for patients of different heights and body types.

[0008] Furthermore, the fixing seat has a groove that extends radially through the fixing hole on the side opposite to the wing plate. The groove extends axially along the fixing hole and divides the fixing seat into two halves. The locking mechanism is connected between the two halves and can tighten the two halves so that the fixing hole holds the main pipe.

[0009] In this way, by tightening the two half-seats, the diameter of the fixing hole is reduced, thus gripping the main pipe and distributing the pressure applied to the main pipe circumferentially, thereby keeping the internal cavity of the main pipe unobstructed. At the same time, the way the fixing hole grips the main pipe increases the contact area between them, giving them greater friction and allowing the fixing seat and the main pipe to be reliably fixed together.

[0010] Furthermore, the locking mechanism is a hook disposed on one of the half-seats, the hook being located on the side of the fixed seat away from the wing plate; the hook includes a connecting handle extending toward the other half-seat, the end of the connecting handle having a hook body protruding toward the wing plate, and the hook body having an inclined guide surface on the side away from the connecting handle; the other half-seat has a locking block portion corresponding to the hook body, the hook body and the locking block portion engaging with each other when the two half-seats are close together.

[0011] By positioning the hook on the side away from the wing plate, the fixing hole can better grip the main pipe circumferentially. Furthermore, this structure only requires pinching the two halves of the seat towards the center to engage the hook with the locking block, making operation more convenient and quick.

[0012] Furthermore, at least two hooks are provided along the axial direction of the fixing hole.

[0013] Furthermore, the inner wall of the fixing hole has a protruding ridge, which extends in a ring shape along the circumference of the fixing hole.

[0014] Furthermore, the protrusion height of the convex ridge is 0.5 to 1 mm.

[0015] Furthermore, at least two of the protruding ridges are provided along the axial direction of the fixing hole.

[0016] Furthermore, the main body is made of silicone or an optimized polyurethane material.

[0017] In summary, this utility model has the advantages of ingenious structural design, the ability to be sutured and fixed according to the position of the puncture hole, good adaptability, and high stability of the catheter placement. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the suture wing structure in this embodiment.

[0020] Figure 3 This is a schematic diagram of the structure of the suture wing fixing tube in this embodiment. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments.

[0022] In practical implementation: such as Figures 1-3 As shown, a temporary dialysis catheter includes a main tube 1, which has two independent lumens, with an arterial port and a venous port at the ends of the two lumens, respectively. The other end of the main tube 1 is connected to an extension tube 2, which communicates with the two lumens. Each extension tube 2 is equipped with a stop clamp 3 and a Luer connector 4 at its end. The main tube 1 has a suture wing 5. The suture wing 5 includes a fixing seat 51 with a through-hole. The diameter of the fixing hole matches the outer diameter of the main tube 1 and is axially movable and fitted onto the main tube 1. The fixing seat 51 has wing plates 52 extending to both sides along the tangent of the fixing hole, with suture holes for suturing through the wing plates 52. The fixing seat 51 also has a locking mechanism for holding the main tube 1.

[0023] In this embodiment, the fixing seat 51 has a radially penetrating groove 53 on the side opposite to the wing plate 52. The groove 53 extends axially along the fixing hole and divides the fixing seat 51 into two halves. The locking mechanism is connected between the two halves and can tighten the two halves, causing the fixing hole to grip the main pipe 1. Specifically, as shown... Figure 2As shown, the locking mechanism is a hook 54 disposed on one of the half-seats, the hook 54 being located on the side of the fixing seat 51 opposite to the wing plate 52; the hook 54 includes a connecting handle extending toward the other half-seat, the end of the connecting handle having a hook body protruding toward the wing plate 52, the hook body having an inclined guide surface on the side opposite to the connecting handle; the other half-seat has a locking block portion corresponding to the hook body, the hook body and the locking block portion engaging with each other when the two half-seats are close together; two hooks 54 are distributed along the axial direction of the fixing hole.

[0024] In order to allow the fixing hole to better fit with the main pipe, the inner wall of the fixing hole has a protruding ridge (not shown in the figure). The ridge extends in a ring along the circumference of the fixing hole, the protrusion height of the ridge is 0.5 to 1 mm, and at least two ridges are provided along the axial direction of the fixing hole.

[0025] Using the temporary dialysis catheter of this embodiment, after the main tube is inserted, the fixation seat is moved along the main tube to near the puncture port. The two halves of the fixation seat are pinched together towards the center, allowing the hooks to pull the two halves taut, thereby narrowing the fixation port towards the center and gripping the main tube, thus forming a fixed connection between the main tube and the fixation seat. The suture plate is then sutured to the skin using the suture hole for fixation. Because the suture wings are located at the puncture port, the stability of the catheter insertion is higher. This structure is suitable for patients of different heights and body types.

[0026] 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 temporary dialysis catheter, comprising a main tube (1), wherein the main tube (1) has two independent lumens, and the ends of the two lumens are respectively provided with an arterial port and a venous port; the other end of the main tube (1) is connected to an extension tube (2) communicating with the two lumens respectively, and each of the two extension tubes (2) is provided with a stop clip (3) and its end is connected with a Luer connector (4); the main tube (1) is provided with a suture wing (5); characterized in that, The suture wing (5) includes a fixing seat (51), which has a through fixing hole. The diameter of the fixing hole matches the outer diameter of the main tube (1) and is axially movable and sleeved on the main tube (1). The fixing seat (51) has a wing plate (52) extending to both sides along the tangent direction of the fixing hole. The wing plate (52) has a through suture hole for suturing. The fixing seat (51) has a locking mechanism for holding the main tube (1).

2. The temporary dialysis catheter as described in claim 1, characterized in that, The fixing seat (51) has a groove (53) that runs radially through the fixing hole on the side opposite to the wing plate (52). The groove (53) extends axially along the fixing hole and divides the fixing seat (51) into two halves. The locking mechanism is connected between the two halves and can tighten the two halves so that the fixing hole holds the main tube (1).

3. The temporary dialysis catheter as described in claim 2, characterized in that, The locking mechanism is a hook (54) provided on one of the half-seats. The hook (54) is located on the side of the fixed seat (51) away from the wing plate (52). The hook (54) includes a connecting handle extending toward the other half-seat. The end of the connecting handle has a hook body protruding toward the wing plate (52). The side of the hook body away from the connecting handle has an inclined guide surface. The other half-seat has a locking block part corresponding to the hook body. The hook body and the locking block part are engaged with each other when the two half-seats are close together.

4. The temporary dialysis catheter as described in claim 3, characterized in that, At least two hooks (54) are provided along the axial direction of the fixing hole.

5. The temporary dialysis catheter as described in claim 3, characterized in that, The inner wall of the fixing hole has a protruding ridge, which extends in a ring along the circumference of the fixing hole.

6. The temporary dialysis catheter as described in claim 5, characterized in that, The protrusion height of the convex ridge is 0.5 to 1 mm.

7. The temporary dialysis catheter as described in claim 5, characterized in that, At least two protruding ridges are provided along the axial direction of the fixing hole.

8. The temporary dialysis catheter as described in claim 1, characterized in that, The main tube is made of silicone or optimized polyurethane material.

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