A low-infection-risk detachable fixed-wing and recess-free fluid-stopping hemodialysis catheter system

Abstract

This invention discloses a low-infection-risk detachable fixation wing and grooveless stop clamp hemodialysis catheter system, belonging to the field of medical device technology. This invention addresses two core pain points of existing long-term hemodialysis catheters: first, it redesigns the traditional one-piece fixation wing as a detachable structure, allowing for quick assembly and disassembly by external force without damaging the catheter, facilitating skin cleaning and reducing the risk of local infection and mechanical damage; second, it optimizes the separate stop clamp into a grooveless structure integrated with the connector, employing a full, smooth inner lumen to completely eliminate dead zones for bacterial residue, reducing catheter-related bloodstream infections at the source. This invention has a simple structure, strong clinical adaptability, and can be widely applied in the field of long-term hemodialysis treatment, demonstrating significant clinical application value.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an improved structure of a central venous catheter (TCC) for long-term hemodialysis, which is particularly suitable for the clinical application of long-term indwelling dialysis catheters in patients with end-stage renal disease in the nephrology department. Background Technology

[0002] Long-term indwelling central venous catheters (TCCs) are a crucial access route for hemodialysis in patients with end-stage renal disease. Existing technologies suffer from two major clinical challenges: 1. Non-removable fixation wings: Current TCC catheters have fixation wings integrated with the catheter body. Even after suture removal, the wings remain in contact with the skin, making thorough cleaning difficult and increasing the risk of local inflammation and pressure sores. Furthermore, removal can easily damage the catheter, increasing the risk of infection. 2. Grooves and dead angles in the stopcock / connector: Traditional stopcocks and connectors are separate designs. The connector has internal grooves and bends, allowing blood and secretions to accumulate and form biofilms, hindering thorough disinfection and significantly increasing the incidence of catheter-related bloodstream infections (CRBSI). Current market products cannot simultaneously address the two core requirements of "removable fixation" and "grooves-free infection prevention." This invention addresses these two structural issues. Summary of the Invention

[0003] 3.1 Purpose of the Invention The present invention aims to provide a hemodialysis catheter system with low infection risk. By improving the two core structures of the fixing wing and the stop clamp, the above-mentioned defects of the prior art are solved, and the safety and comfort of long-term dialysis treatment are improved. 3.2 Technical Solution A hemodialysis catheter system with low infection risk, the core improvements are the following two structures: (1) Detachable fixing wing structure: The fixing wing and the catheter body are designed separately and are connected by a snap / sleeve method. It can be quickly disassembled and assembled under external force without damaging the catheter body during disassembly. The fixing wing is made of flexible medical silicone material, which fits the skin without irritation and can be disassembled and cleaned at any time according to clinical needs. (2) Grooveless integrated stop clamp structure: The stop clamp and the catheter connector are integrated into a molded design. The inside of the connector adopts a completely closed, full, grooveless smooth inner cavity with no structural dead corners, which facilitates thorough disinfection and cleaning and reduces bacterial colonization from the source. 3.3 Beneficial Effects Compared with the prior art, the present invention has the following beneficial effects: (1) Detachable fixing wings reduce the risk of infection and damage: The fixing wings can be detached at any time, which facilitates local skin cleaning and care, avoids inflammation caused by long-term pressure, and does not damage the catheter during the disassembly process, thus extending the service life of the catheter. (2) Grooveless integrated anti-dampness clip prevents infection from the root: The integrated structure and grooveless smooth inner cavity completely eliminate the dead corners of bacterial residue, which can achieve thorough disinfection and significantly reduce the incidence of catheter-related blood flow infection. (3) Simple structure and strong clinical adaptability: The improvement is only aimed at the core pain points, without changing the main structure of the catheter, and is compatible with the existing standard dialysis catheter interface. No additional supporting equipment is required, which facilitates clinical promotion. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of the hemodialysis catheter system described in this invention, showing the relative positions of the catheter body, the detachable fixing wings, and the A / V lumen. Figure 2 The diagram shows the clinical application of the hemodialysis catheter system described in this invention. The red area in the diagram shows the improved full-bodied, smooth, groove-free inner cavity structure of this invention, while the green area shows the detachable fixed wing structure of this invention. The diagram also presents the clinical application status of the two core innovative features. Figure 3 This is a schematic diagram comparing the structure of the detachable fixed wing described in this invention with that of a fixed wing in the prior art. The upper diagram shows the state of the non-detachable fixed wing in the prior art, while the lower diagram shows the structure of the fixed wing of this invention that can be disassembled by external force, which intuitively demonstrates the technical improvement of this invention in terms of fixing method. Detailed Implementation The following detailed description, in conjunction with the accompanying drawings, describes two core structural improvements of this invention: 5.1 Detachable Fixing Wing Structure: The fixing wing is made of medical-grade flexible silicone and is a separate design from the catheter body. A through-hole, perfectly matching the outer diameter of the catheter body, is located in the center of the fixing wing. An elastic buckle is integrally formed on the inner side of the through-hole. A corresponding groove matching the buckle is located on the outer wall of the catheter body. In clinical use, the fixing wing is pushed along the catheter body to the designated position, and the elastic buckle automatically engages in the groove on the outer wall of the catheter, stabilizing the catheter and providing fixation against the patient's skin. After the patient's sutures are removed, the elastic buckle can be released at any time by gently pressing it, and the fixing wing can be quickly separated by pulling it outwards. This process avoids contact with the inner wall of the catheter, eliminating the risk of catheter damage and facilitating thorough cleaning and care of the local skin area, reducing the risk of infection. 5.2 The integrated, groove-free stopcock structure features a single, molded design between the stopcock and the catheter connector. The connector's interior employs a completely sealed, full-bodied structure with a smooth transition throughout the entire lumen, free of any grooves, bends, or other structural dead zones. The inner wall is polished, resulting in a smooth surface free of residue. After dialysis, pressing the integrated stopcock completely seals the catheter lumen, preventing blood backflow. During dialysis connection, opening the stopcock does not impede normal blood flow. Because the connector's interior has a smooth, groove-free structure, eliminating dead zones for blood and secretions, thorough disinfection and cleaning of the connector's interior is achieved, reducing bacterial colonization and biofilm formation at the source and effectively lowering the probability of catheter-related bloodstream infections. This invention only improves the two core structural elements—the fixing wing and the stopcock—without altering other aspects of the catheter's structure or usage procedures. It offers convenient clinical operation, strong adaptability, and suitability for various long-term hemodialysis patients.

Claims

1. A low-infection-risk detachable fixing wing and grooveless stop clamp hemodialysis catheter system, comprising a catheter body, fixing wings, a connector, and a stop clamp, characterized in that: The fixed wing is a detachable structure that is movably connected to the catheter body by means of a snap or a sleeve, and can be quickly disassembled and assembled under external force without damaging the catheter body.

2. The system according to claim 1, characterized in that, The liquid-stopping clamp and the connector are integrally molded structures. The connector has a smooth, full inner cavity without grooves or structural dead corners, which facilitates thorough disinfection and cleaning.

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