Magnetic type venous catheter in-vitro fixing device

Abstract

The invention discloses an in-vitro fixing device for a magnetic type venous catheter. The in-vitro fixing device comprises a first catheter limiting group, a second catheter limiting group, a first magnetic component and a second magnetic component, the first catheter limiting group comprises a plurality of first limiting structures with different sizes; the second catheter limiting group comprises a plurality of second limiting structures with different sizes; each first limiting structure can be matched with the plurality of second limiting structures so as to selectively form limiting holes with different sizes; the first magnetic attraction assembly is arranged on the first guide pipe limiting set. The second magnetic attraction assembly is arranged on the second guide pipe limiting set. The first magnetic attraction assembly and the second magnetic attraction assembly can attract each other. The invention aims to provide the magnetic type venous catheter in-vitro fixing device which can realize flexible fixation of venous catheters with different sizes and effectively solve the problem of insufficient adaptability of the venous catheters in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of catheter fixers, and in particular to a magnetic intravenous catheter extracorporeal fixation device. Background Art

[0002] With the widespread use of intravenous catheters in clinical treatments, particularly in critical care, cancer chemotherapy, and long-term infusion therapy, demands for the reliability and adaptability of extracorporeal intravenous catheter fixation devices are increasing. According to the latest clinical statistics, over 85% of inpatients in tertiary hospitals require intravenous catheter therapy, and approximately 30% of these patients experience complications during treatment due to issues with the fixation device.

[0003] Furthermore, with the widespread use of intravenous catheters in clinical treatment, the reliability and adaptability of extracorporeal intravenous catheter fixation devices are increasingly demanding. However, existing intravenous catheter fixation devices typically only accommodate catheters of a single size and lack the flexibility to accommodate intravenous catheters of varying sizes and diameters. This necessitates simultaneous replacement of the fixation device when replacing a catheter, increasing medical costs and operational burdens. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a magnetic intravenous catheter extracorporeal fixation device, which can achieve flexible fixation of intravenous catheters of different sizes, effectively solving the problem of insufficient adaptability of intravenous catheters in the existing technology.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] A magnetic intravenous catheter in vitro fixation device includes: a first catheter limiting group, the first catheter limiting group includes multiple first limiting structures of different sizes; a second catheter limiting group, the second catheter limiting group includes multiple second limiting structures of different sizes; each first limiting structure can be adapted to multiple second limiting structures to selectively form limiting holes of different sizes; a first magnetic component, the first magnetic component is arranged in the first catheter limiting group; a second magnetic component, the second magnetic component is arranged in the second catheter limiting group; wherein the first magnetic component and the second magnetic component can be attracted to each other.

[0007] Furthermore, each of the second limiting structures can be adapted to a plurality of the first limiting structures to form limiting holes of different sizes.

[0008] Furthermore, each of the second limiting structures can be adapted to a plurality of the first limiting structures to form limiting holes of different sizes.

[0009] Furthermore, the plurality of first limiting structures of the first conduit limiting group are arranged at equal intervals in sequence along a linear direction, the plurality of second limiting structures of the second conduit limiting group are arranged at equal intervals in sequence along a first linear direction, and the spacing between two adjacent first limiting structures is equal to the spacing between two adjacent second limiting structures.

[0010] Furthermore, the first catheter limiting group is provided with at least one first connecting structure, and the second catheter limiting group is provided with at least one second connecting structure; the magnetic intravenous catheter in vitro fixing device also includes a connecting component, which is arranged across the connection interface between the first catheter limiting group and the second catheter limiting group, one end of the connecting component is connected to the first connecting structure, and the other end of the connecting component is connected to the second connecting structure; the connecting component is used to lock the first catheter limiting group and the second catheter limiting group together to prevent the connection interface of the first catheter limiting group and the connection interface of the second catheter limiting group from moving away from each other.

[0011] Furthermore, there are multiple first connecting structures, and the multiple first connecting structures are distributed at equal intervals along the first linear direction; there are multiple second connecting structures, and the multiple second connecting structures are distributed at equal intervals along the first linear direction; and the spacing between two adjacent first connecting structures is equal to the spacing between two adjacent second connecting structures; each first connecting structure can adapt to at least multiple second connecting structures, and each second connecting structure can adapt to at least multiple first connecting structures.

[0012] Furthermore, each of the first connecting structures is combined with one of the second connecting structures to form an annular structure, and the annular structure is extended along the extension direction of the limiting hole; the outer peripheral surface of the annular structure is provided with an external thread structure; the connecting assembly has a cylindrical cavity, and the annular structure is sleeved on the cavity wall of the cylindrical cavity; the inner wall of the cylindrical cavity is provided with an internal thread structure that cooperates with the external thread structure of the annular structure.

[0013] Furthermore, the connecting component includes a catheter channel and a catheter fastening mechanism; when the connecting component locks the first catheter limiting group and the second catheter limiting group together, the catheter channel and the limiting hole are connected in sequence along the extension direction of the limiting hole; the catheter fastening mechanism includes a plurality of groups of U-shaped elastic metal wires distributed in sequence along the circumference of the cylindrical cavity, one of the U-shaped elastic metal wires is arranged on the inner wall of the annular structure, and the open end of the U-shaped elastic metal wire is fixed to the inner wall of the annular structure; the open ends of the other plurality of the U-shaped elastic metal wires extend from the inside to the outside along the radial direction of the cylindrical cavity and are fixed to the inner wall of the catheter channel; the bent portions of each of the U-shaped elastic metal wires belonging to the same catheter fastening mechanism are stacked in sequence to form a plurality of continuous catheter guiding paths, so as to jointly constitute the elastic clamping portion of the intravenous catheter.

[0014] Furthermore, the magnetic intravenous catheter extracorporeal fixation device also includes a positioning mechanism, which includes multiple protrusion structures and multiple recessed structures. Multiple protrusion structures are arranged on the connection interface of the first catheter limiting group facing the second catheter limiting group, and multiple recessed structures are arranged on the connection interface of the second catheter limiting group facing the first catheter limiting group; multiple protrusion structures are distributed at equal intervals along the first linear direction, and multiple recessed structures are distributed at equal intervals along the first linear direction, and the spacing between two adjacent protrusion structures is equal to the spacing between two adjacent recessed structures; each protrusion structure and each recessed structure can be adapted to each other.

[0015] Furthermore, the magnetic intravenous catheter extracorporeal fixation device further comprises a bonding component, which is arranged on an outer mounting surface of the second catheter limiting group away from the first catheter limiting group.

[0016] Furthermore, the magnetic intravenous catheter extracorporeal fixation device also includes a bonding component, which includes a first bonding base and a second bonding base arranged in sequence and spaced apart in the horizontal direction, the first bonding base is arranged on the side of the first catheter limiting group facing the human skin, and the second bonding base is arranged on the side of the second catheter limiting group facing the human skin.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Multi-size retaining structure design: Based on a small number of first and second retaining structures, a wide range of retaining holes of varying sizes can be flexibly combined. This design allows the device to accommodate intravenous catheters of varying diameters, improving versatility. Through modular assembly, the present invention enables flexible fixation of intravenous catheters of varying sizes, effectively addressing the limited adaptability of intravenous catheters in the prior art.

[0019] 2. Flexible Combination Design of the Restricting Structures: The first and second restricting structures can be dynamically combined to form restricting holes of varying sizes, with consistent spacing between adjacent restricting structures, ensuring precise alignment during assembly. Furthermore, the raised and recessed positioning mechanism further enhances assembly stability. This flexible combination design ensures stability while enabling stepless adjustment, allowing for flexible fixation of intravenous catheters of varying sizes, addressing the limited adaptability of intravenous catheters in existing technologies.

[0020] 3. Innovative design of the connecting structure: The first connecting structure and the second connecting structure are screwed together to form a circular locking mechanism. The internal thread of the connecting assembly cooperates with the external thread of the circular ring to achieve rapid locking and release of the first and second catheter limiting groups. The clamping force of the limiting holes can be precisely adjusted to achieve stable fixation of the intravenous catheter. Multiple groups of U-shaped metal wires are stacked to form an elastic clamping part, which not only provides a flexible guide path but also stabilizes the intravenous catheter through radial elastic force. This achieves precise adaptation to intravenous catheters of different specifications, effectively solving the problems of insufficient adaptability and unstable fixation caused by slight differences in the size of the intravenous catheter and the fixing device in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a first embodiment of the magnetic intravenous catheter extracorporeal fixation device of the present invention;

[0022] Figure 2 for Figure 1 A cross-sectional view of the magnetic intravenous catheter extracorporeal fixation device shown;

[0023] Figure 3 for Figure 2 A partially enlarged cross-sectional view of the magnetic intravenous catheter extracorporeal fixation device shown;

[0024] Figure 4 Schematic diagram of the structure of the second embodiment of the magnetic intravenous catheter extracorporeal fixation device of the present invention.

[0025] In the figure: 1. First catheter limiting group; 2. First limiting structure; 3. Second catheter limiting group; 4. Second limiting structure; 5. Limiting hole; 6. First magnetic component; 7. Second magnetic component; 8. First connecting structure; 9. Second connecting structure; 10. Connecting component; 11. Ring structure; 12. Cylindrical cavity; 13. Catheter channel; 14. Catheter fastening mechanism; 15. U-shaped elastic metal wire; 16. Positioning mechanism; 17. Protruding structure; 18. Concave structure; 19. Bonding component; 20. First bonding matrix; 21. Second bonding matrix. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element, or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element, or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] First embodiment:

[0030] See also Figure 1 , a specific implementation method of a preferred embodiment of the present invention.

[0031] A magnetic intravenous catheter external fixation device includes: a first catheter limiting group 1, a second catheter limiting group 3, a first magnetic component 6, and a second magnetic component 7; the first catheter limiting group 1 includes multiple first limiting structures 2 of different sizes; the second catheter limiting group 3 includes multiple second limiting structures 4 of different sizes; each first limiting structure 2 can be adapted to multiple second limiting structures 4 to selectively form limiting holes 5 of different sizes; the first magnetic component 6 is provided in the first catheter limiting group 1; the second magnetic component 7 is provided in the second catheter limiting group 3; wherein the first magnetic component 6 and the second magnetic component 7 can be attracted to each other. The first catheter limiting group 1 and the second catheter limiting group 3 adopt a flexible structure, each section containing multiple (e.g., 3 to 6) limiting structures of different sizes (e.g., semicircular, elliptical, trapezoidal grooves) to fit the curves of the human body. Preferably, the first limiting structures 2 and the second limiting structures 4 included in the first catheter limiting group 1 and the second catheter limiting group 3 present a limiting structure size gradient. For example, in this embodiment, the semicircular apertures of the first catheter limiting group 1 and the second catheter limiting group 3 are all 1mm, 2mm, 3mm, 4mm, 5mm, and 6mm, and when they are overlapped, they form circular limiting holes 5 of different radii to accommodate intravenous catheters of different sizes. Alternatively, the semicircular apertures of the first catheter limiting group 1 are 1mm, 2mm, and 3mm, which can be combined with the different apertures of 1mm, 2mm, 3mm or 1.5mm, 2.5mm, and 3.5mm of the second catheter limiting group 3 to form limiting holes 5 adapted to different catheter diameters (e.g., a 1mm catheter and a 2mm catheter are combined to form a 1.5mm catheter, or a 1mm catheter and a 1.5mm catheter are combined to form a 1.25mm catheter), and so on. That is, each first limiting structure 2 of the first catheter limiting group 1 can selectively match the required second limiting structure 4 according to the requirements of different intravenous catheters. The first magnetic attraction component 6 and the second magnetic attraction component 7 use neodymium magnets or ferromagnetic metal sheets with alternating NS poles, which are respectively embedded in the back of the first catheter limiting group 1 and the second catheter limiting group 3. Silicone anti-slip grooves can be added to the periphery to enhance the adsorption stability.

[0032] It is understood that the first catheter limiting group 1 and the second catheter limiting group 3 of the present invention are made of a flexible material (such as silicone) or a rigid material. When a rigid material is selected, it is recommended to design the first catheter limiting group 1 and the second catheter limiting group 3 into an arc that can fit tightly to better adapt to the structure of the target part of the human body. For example, if applied to the arm, it can match the natural curvature of the arm; if used on the abdominal surface, it can adapt to the gentle curve of the abdomen. This fitting design can improve the stability of the intravenous catheter fixation and reduce pressure on the skin.

[0033] When the device is working, the user selects the appropriate first catheter limiting group 1 and second catheter limiting group 3 from the first limiting structure 2 and second limiting structure 4 with preset basic radius specifications such as 1mm, 2mm, and 3mm according to the diameter of the intravenous catheter. The intravenous catheter is placed in the selected second limiting structure 4 of the second catheter limiting group 3, and the bending device (flexible structure) is used to make the whole body fit the curvature of the limb. At this time, the embedded first magnetic component 6 and second magnetic component 7 come into play, and the magnetic force automatically aligns and adsorbs the first catheter limiting group 1 with the second catheter limiting group 3 to form a complete limiting hole 5. In this process, the magnetic force ensures that the two sets of limiting structures fit firmly together, while the semicircular groove wall of the silicone material provides friction. The two work together to prevent the displacement of the intravenous catheter. When encountering catheters with non-standard diameters (such as 1.25mm, 1.75mm), limiting structures with different basic radii can be selected for combination, such as a 1.5mm first limiting structure 2 and a 1mm second limiting structure 4, or a 1.5mm first limiting structure 2 and a 2mm second limiting structure 4. Through this combination, the limiting hole 5 applies a more reasonable pressure to the intravenous catheter, and then adjusts the friction force as needed to adapt to different intravenous catheters. Due to the characteristics of the magnetic component, the first catheter limiting group 1 and the second catheter limiting group 3 can be freely separated and realigned, and different combinations can be quickly switched to achieve flexible fixation of intravenous catheters of various sizes. In addition, the multi-stage magnetic array optimizes the distribution of magnetic lines of force, realizes fault-tolerant docking and slidable adjustment, and cooperates with the changes in the friction coefficient of the adaptive silicone layer at different temperatures and the micro-column array structure. This optimization scheme is based on the magnetic structure and the multi-combination limiting structure, and uses the multi-stage magnetic array and the adaptive limiting structure to complete the dynamic adjustment upgrade, and enhances clinical adaptability through multi-catheter compatible design and limb contact surface optimization. The invention can achieve flexible fixation of venous catheters of different sizes, effectively solving the problem of insufficient adaptability of venous catheters in the prior art.

[0034] During the specific implementation, the medical staff first selects the matching first catheter limiting group 1 and second catheter limiting group 3 from the preset standardized limiting structures (such as 1mm, 2mm, 3mm radius specifications) according to the outer diameter of the intravenous catheter; for non-standard diameter catheters (such as 1.5mm), adaptation is achieved by combining different specifications of limiting structures (such as 1mm and 2mm pairing). During operation, the second catheter limiting group 3 is first pressed to fit the patient's limb curve, and then the intravenous catheter is placed in the second limiting structure 4 of the selected second catheter limiting group 3. Automatic alignment and adsorption are achieved through the embedded magnetic components in the two groups of limiting structures (the positioning structure can be used to enhance adsorption and locking) to form a complete limiting hole 5, in which the magnetic attraction ensures accurate positioning, and the silicone groove wall provides friction resistance to prevent the catheter from moving. Finally, mechanical locking is completed by rotating the threaded sleeve of the connecting component 10 or pressing the buckle structure to achieve stable fixation of the catheter. This process ensures the reliability of fixation and improves the convenience of clinical operation through the synergistic effect of modular combination design, magnetic self-alignment and elastic friction.

[0035] Furthermore, when the first retaining structure 2 and the second retaining structure 4 overlap through magnetic attraction, they precisely connect to form new retaining holes 5. These retaining holes 5 extend throughout the entire first and second catheter retaining groups 1 and 3, forming a passage for the intravenous catheter and ensuring precise positioning and fixation of the intravenous catheter. The retaining holes 5 also come in a variety of shapes. Circular holes can provide all-around containment and restraint for circular intravenous catheters; polygonal holes, thanks to the friction generated by corner contact, effectively prevent the catheter from rotating; and rectangular holes are suitable for flat intravenous catheters, ensuring their stability in a specific direction.

[0036] Each second limiting structure 4 can be adapted to multiple first limiting structures 2 to form limiting holes 5 of different sizes. Each second limiting structure 4 of the second catheter limiting group 3 can be matched with multiple first limiting structures 2 to form limiting holes 5 of different sizes. This situation can improve the utilization effect of the limiting structure. On the contrary, in order to improve adaptability and safety, in certain special cases (such as when a catheter with a larger diameter is needed), if medical staff mistakenly select an unmatched combination of the first limiting structure 2 and the second limiting structure 4 (such as selecting an overly small limiting hole 5), it may cause the intravenous catheter to be compressed and damaged, dialysis abnormalities or drug delivery obstacles, thereby endangering patient safety. For this reason, a detachable blocking component is provided at the limiting structure that exceeds the safe use range. This component can effectively prevent medical staff from misusing an inappropriate limiting hole 5 combination while maintaining flexibility in use - the blocking can be removed when a special size is required, and it plays a safety protection role during normal use. This design not only ensures the versatility of the device, but also ensures the safety of clinical operation.

[0037] The multiple first limiting structures 2 of the first catheter limiting group 1 are arranged in sequence at equal intervals along the linear direction, and the multiple second limiting structures 4 of the second catheter limiting group 3 are arranged in sequence at equal intervals along the first linear direction, and the spacing between two adjacent first limiting structures 2 is equal to the spacing between two adjacent second limiting structures 4. The multiple first limiting structures 2 of the first catheter limiting group 1 are evenly distributed along the linear direction (the first linear direction), and the spacing between adjacent structures is a fixed value d; the multiple second limiting structures 4 of the second catheter limiting group 3 are also arranged at equal intervals along the same direction (the first linear direction), and the adjacent spacing is consistent with that of the first catheter limiting group 1, both being d; matching and combination flexibility: Since the spacing between the two groups of limiting structures is the same, any second limiting structure 4 can be aligned and combined with the first limiting structure 2 at different positions, thereby forming limiting holes 5 of different sizes to accommodate the needs of intravenous catheters of different diameters. This symmetrical and evenly spaced layout design not only improves the adaptability and adjustability of the retaining structure, but also provides a parallel retaining group layout. The first catheter retaining group 1 and the second catheter retaining group 3 can be arranged parallel to each other along the axial direction, forming multiple sets of independently matched retaining holes 5, with each pair of retaining holes 5 corresponding to the securing requirements of a single intravenous catheter. It also facilitates medical personnel to quickly select the correct combination and provides a standardized installation benchmark for the setting of the blocking component (for example, to prevent the misuse of unsafe sizes).

[0038] The first catheter retaining group 1 is provided with at least one first connecting structure 8, and the second catheter retaining group 3 is provided with at least one second connecting structure 9. The magnetic intravenous catheter external fixation device also includes a connecting assembly 10, which is arranged across the connection interface between the first catheter retaining group 1 and the second catheter retaining group 3. One end of the connecting assembly 10 is connected to the first connecting structure 8, and the other end of the connecting assembly 10 is connected to the second connecting structure 9. The connecting assembly 10 is used to lock the first catheter retaining group 1 and the second catheter retaining group 3 together to prevent the connection interface of the first catheter retaining group 1 and the connection interface of the second catheter retaining group 3 from moving away from each other. The magnetic intravenous catheter external fixation device adopts a modular design and consists of three parts: the first catheter retaining group 1, the second catheter retaining group 3, and the connecting assembly 10. Among them, the first catheter retaining group 1 and the second catheter retaining group 3 can each be provided with a first connecting structure 8 and a second connecting structure 9 with a snap-on seat. The connecting assembly 10 is connected between the two sets of retaining structures through a snap-on, magnetic, or latch-on connection method to achieve quick locking and fixation. During operation, simply align the connection interfaces of the two sets of retaining structures and insert the connecting assembly 10 to form a stable connection. Its unique multi-directional retaining block design, including up and down, left and right, and front and back, effectively prevents displacement in all directions, ensuring a secure fixation of the intravenous catheter. The device not only supports the simultaneous fixation of single or multiple catheters but also features a removable stopper to prevent misuse. The overall design combines ease of operation, structural stability, and clinical adaptability, meeting the needs of intravenous catheter fixation in various medical scenarios, such as intravenous infusion and dialysis.

[0039] Multiple first connecting structures 8 are provided, and the multiple first connecting structures 8 are evenly spaced along the first linear direction. Multiple second connecting structures 9 are provided, and the multiple second connecting structures 9 are evenly spaced along the first linear direction. The spacing between two adjacent first connecting structures 8 is equal to the spacing between two adjacent second connecting structures 9. Each first connecting structure 8 can accommodate at least multiple second connecting structures 9, and each second connecting structure 9 can accommodate at least multiple first connecting structures 8. The fixture adopts a modular linear layout design. The first conduit limiting group 1 and the second conduit limiting group 3 are respectively provided with multiple first connecting structures 8 and second connecting structures 9 at equal spacing along the first linear direction. The adjacent spacing between the two groups of connecting structures is the same, forming a standardized array layout. This symmetrical distribution design allows any first connecting structure 8 to be flexibly paired with multiple second connecting structures 9, and vice versa, thereby achieving dynamic adjustment of limiting holes 5 of different sizes. In actual applications, medical staff can stagger the two sets of limiting structures according to the different diameter requirements of the intravenous catheter, and lock the 9 pairs of first and second connecting structures at specific positions through the connecting component 10, which not only ensures the fixation accuracy but also provides the possibility of adapting to multiple specifications; at the same time, the equidistant design enables the structural consistency to be maintained when adding blocking parts or expanding the fixation of multiple catheters, ensuring the standardization and scalability of clinical operations.

[0040] Each first connecting structure 8 combines with one of the second connecting structures 9 to form an annular structure 11, which extends along the extension direction of the limiting hole 5. The outer circumference of the annular structure 11 is provided with an external thread structure. The connecting assembly 10 has a cylindrical cavity 12, and the annular structure 11 is sleeved on the cavity wall of the cylindrical cavity 12. The inner wall of the cylindrical cavity 12 is provided with an internal thread structure that mates with the external thread structure of the annular structure 11. The fixing device adopts a threaded engagement connection design, wherein the first connecting structure 8 and the second connecting structure 9 combine to form an annular limiting structure with an external thread, which extends axially along the limiting hole 5 and forms a fixing channel for the intravenous catheter. The coupling assembly 10 precisely mates with the external threads of the ring structure by providing a cylindrical cavity 12 with internal threads. When the coupling assembly 10 is rotated, the meshing of the internal and external threads secures the first catheter retaining assembly 1 and the second catheter retaining assembly 3 via the ring structure formed by the first connecting structure 8 and the second connecting structure 9. This allows for precise adjustment of the clamping force of the retaining hole 5 to achieve a secure fixation of the intravenous catheter. During installation, medical personnel simply align the two retaining structures to form a complete ring and then screw the coupling assembly 10 into place to complete the installation. The threaded connection method not only allows for flexible fixation of intravenous catheters of varying sizes, effectively resolving the problem of insufficient adaptability of intravenous catheters in the prior art, but also provides reliable pull-out resistance through the spiral locking mechanism. This makes it particularly suitable for clinical scenarios where intravenous catheters require long-term indwelling or are susceptible to traction.

[0041] See also Figure 2 、 Figure 3 The connecting component 10 includes a catheter channel 13 and a catheter fastening mechanism 14; when the connecting component 10 locks the first catheter limiting group 1 and the second catheter limiting group 3 together, the catheter channel 13 and the limiting hole 5 are sequentially connected along the extension direction of the limiting hole 5; the catheter fastening mechanism 14 includes a plurality of groups of U-shaped elastic metal wires 15 distributed in sequence along the circumference of the cylindrical cavity 12, one of the U-shaped elastic metal wires 15 is arranged on the inner wall of the annular structure 11, and the open end of the U-shaped elastic metal wire 15 is fixed to the inner wall of the annular structure 11; the open ends of the other plurality of U-shaped elastic metal wires 15 extend from the inside to the outside along the radial direction of the cylindrical cavity 12 and are fixed to the inner wall of the catheter channel 13; the curved portions of the U-shaped elastic metal wires 15 belonging to the same catheter fastening mechanism 14 are stacked in sequence to form a plurality of continuous catheter guiding paths, which together constitute the elastic clamping portion of the intravenous catheter. The connecting component 10 is composed of a catheter channel 13 and a catheter fastening mechanism 14. The catheter channel 13 is axially connected to the limiting hole 5 to form a catheter penetration path. The fastening mechanism adopts multiple groups of circumferentially distributed U-shaped elastic metal wires 15, one of which is embedded in the inner wall of the annular structure 11 as the basic fixed end, and the remaining U-shaped elastic metal wires 15 are radially anchored to the inner wall of the catheter channel 13, and their curved parts are stacked and staggered to form a continuous catheter guiding path; during operation, the stacked U-shaped metal wires produce radial elastic deformation when the intravenous catheter is inserted, and the adaptive fastening of the catheter is achieved through the coordinated clamping of the multi-stage curved parts. At the same time, the continuity of the guiding path ensures that the intravenous catheter is advanced without jamming; during implementation, the basic metal wire must first be welded to the inner wall of the annulus, and then the remaining metal wires must be radially fixed to the inner wall of the channel at equally divided angles in the circumference. The stacking spacing of each curved part must be controlled within a certain range to ensure that the intravenous catheter has balanced clamping force and passability, and effectively dynamically fix intravenous catheters of different sizes by rotating the connecting component 10.

[0042] See also Figure 2 、 Figure 3The magnetic intravenous catheter external fixation device also includes a positioning mechanism 16, which includes a plurality of protruding structures 17 and a plurality of recessed structures 18. The plurality of protruding structures 17 are provided at the connection interface of the first catheter limiting group 1 facing the second catheter limiting group 3, and the plurality of recessed structures 18 are provided at the connection interface of the second catheter limiting group 3 facing the first catheter limiting group 1. The plurality of protruding structures 17 are evenly spaced along the first linear direction, and the plurality of recessed structures 18 are evenly spaced along the first linear direction. The spacing between two adjacent protruding structures 17 is equal to the spacing between two adjacent recessed structures 18. Each protruding structure 17 and each recessed structure 18 are mutually compatible. The pre-designed adaptability and evenly spaced arrangement characteristics of the protruding structures 17 and recessed structures 18 allow for corresponding mutually attractive magnetic components to be provided on each protruding structure 17 and each recessed structure 18, so that each protruding structure 17 and each recessed structure 18 will naturally attract each other and attempt to align. During the approach process, even if there is a certain initial deviation, as the two gradually approach, the raised structure 17 will be accurately embedded in the recessed structure 18 under the guidance of the guide. This precise embedding action can not only preliminarily fix the relative position of the first catheter limiting group 1 and the second catheter limiting group 3 before the magnetic suction component takes effect, effectively reducing the possibility of misalignment, but also work in conjunction with the magnetic suction component during the subsequent magnetic suction process to further enhance the stability and firmness of the connection between the two groups of limiting structures. After the first catheter limiting group 1 and the second catheter limiting group 3 are assembled and a complete limiting hole 5 is formed to fix the catheter, the positioning mechanism 16 can continuously resist external force interference from all directions, preventing the two groups of limiting structures from relative displacement or rotation due to factors such as the patient's limb movement, thereby ensuring that the intravenous catheter is always in a stable fixed state.

[0043] The magnetic intravenous catheter external fixation device also includes an adhesive assembly 19, which is positioned on the outer mounting surface of the second catheter stop group 3, away from the first catheter stop group 1. Adhesive assembly 19 can be rectangular in shape, allowing for easy coverage on the outer mounting surface of the second catheter stop group 3, and can be made of medical-grade pressure-sensitive adhesive. When using adhesive assembly 19, carefully peel the adhesive from the protective film, taking care to avoid contact with the adhesive surface with your fingers to prevent affecting the adhesiveness. Accurately align the adhesive with the outer mounting surface of the second catheter stop group 3 and gently press it to ensure a smooth fit. During the pasting process, ensure that there are no bubbles or wrinkles between the adhesive and the outer mounting surface to ensure a secure fit. Next, place the entire device in the pre-selected pasting position and gently press again to ensure full contact between the adhesive and the skin. For larger adhesives, gradually press from the center outward to ensure even adhesion. During use, if the adhesive loses its stickiness or becomes loose, replace it with a new adhesive to ensure that the device remains stably fixed to the patient.

[0044] Second embodiment:

[0045] See also Figure 4 The second embodiment includes the first embodiment, and is different from the first embodiment in that:

[0046] Preferably, the bonding component 19 of the magnetic intravenous catheter extracorporeal fixation device includes a first bonding base 20 and a second bonding base 21 arranged in sequence and spaced apart in the horizontal direction, the first bonding base 20 is arranged on the side of the first catheter limiting group 1 facing the human skin, and the second bonding base 21 is arranged on the side of the second catheter limiting group 3 facing the human skin.

[0047] The bonding component 19 of this solution adopts an innovative design, in which the first bonding base 20 and the second bonding base 21 are spaced apart in the horizontal direction. The first bonding base 20 is located on the side of the first catheter limiting group 1 facing the skin, and the second bonding base 21 is located on the side of the second catheter limiting group 3 facing the skin, forming a "double-sided support" structure.

[0048] In the fitting position, the double adhesive matrix of the present device realizes decentralized fixation. For example, in the case of a medium-length intravenous catheter being vertically inserted into the human body, this double-sided fixing method can make the device bear the force more evenly, effectively buffer the pulling forces in different directions generated by limb movements, and prevent the device from loosening as a whole. In terms of the fitting method, first clean the skin below the first catheter limiting group 1, select the required limiting structure pair (the first limiting structure 2 and the corresponding second limiting structure 4), peel off the release film of the first adhesive matrix 20, align the first limiting structure 2 with the outlet of the intravenous catheter connected to the human body and press it flatly to fit; then adjust the position of the second catheter limiting group 3 (align with the outlet of the intravenous catheter connected to the human body), peel off the release film of the second adhesive matrix 21, and fit it precisely to the corresponding skin area. This fitting method ensures that the limiting structure is compatible with the intravenous catheter, is suitable for the case where the intravenous catheter is vertically inserted into the body, and realizes flexible fixation of intravenous catheters of different sizes and different insertion methods, effectively solving the problem of insufficient adaptability of intravenous catheters in the prior art.

[0049] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0051] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A magnetic intravenous catheter external fixation device, characterized in that: include: A first conduit limiting group (1), the first conduit limiting group (1) comprising a plurality of first limiting structures (2) of different sizes; a second conduit limiting group (3), the second conduit limiting group (3) comprising a plurality of second limiting structures (4) of different sizes; each of the first limiting structures (2) can be adapted to a plurality of the second limiting structures (4) to selectively form limiting holes (5) of different sizes; A first magnetic attraction component (6), wherein the first magnetic attraction component (6) is arranged on the first catheter limiting group (1); A second magnetic attraction component (7), wherein the second magnetic attraction component (7) is arranged on the second catheter limiting group (3); The first magnetic attraction component (6) and the second magnetic attraction component (7) are capable of attracting each other.

2. The magnetic intravenous catheter external fixation device according to claim 1, characterized in that: Each of the second limiting structures (4) can be adapted to a plurality of the first limiting structures (2) to form limiting holes (5) of different sizes.

3. The magnetic intravenous catheter external fixation device according to claim 2, characterized in that: The plurality of first limiting structures (2) of the first conduit limiting group (1) are arranged in sequence at equal intervals along a linear direction, and the plurality of second limiting structures (4) of the second conduit limiting group (3) are arranged in sequence at equal intervals along a first linear direction, and the spacing between two adjacent first limiting structures (2) is equal to the spacing between two adjacent second limiting structures (4).

4. The magnetic intravenous catheter external fixation device according to claim 3, characterized in that: The first conduit limiting group (1) is provided with at least one first connection structure (8), and the second conduit limiting group (3) is provided with at least one second connection structure (9); The magnetic intravenous catheter extracorporeal fixation device further comprises a connecting component (10), which is arranged across the connection interface between the first catheter limiting group (1) and the second catheter limiting group (3), one end of the connecting component (10) is connected to the first connection structure (8), and the other end of the connecting component (10) is connected to the second connection structure (9); the connecting component (10) is used to lock the first catheter limiting group (1) and the second catheter limiting group (3) together to prevent the connection interface of the first catheter limiting group (1) and the connection interface of the second catheter limiting group (3) from moving away from each other.

5. The magnetic intravenous catheter external fixation device according to claim 4, characterized in that: There are a plurality of the first connecting structures (8), and the plurality of the first connecting structures (8) are distributed at equal intervals along the first linear direction; There are a plurality of the second connecting structures (9), and the plurality of the second connecting structures (9) are distributed at equal intervals along the first linear direction; and the spacing between two adjacent first connecting structures (8) is equal to the spacing between two adjacent second connecting structures (9); Each of the first connection structures (8) is at least capable of adapting to a plurality of the second connection structures (9), and each of the second connection structures (9) is at least capable of adapting to a plurality of the first connection structures (8).

6. The magnetic intravenous catheter external fixation device according to claim 5, characterized in that: Each of the first connecting structures (8) and one of the second connecting structures (9) is combined to form a circular ring structure (11), and the circular ring structure (11) is extended along the extension direction of the limiting hole (5); the outer peripheral surface of the circular ring structure (11) is provided with an external thread structure; The connecting assembly (10) has a cylindrical cavity (12), and the annular structure (11) is sleeved on the cavity wall of the cylindrical cavity (12); the inner wall of the cylindrical cavity (12) is provided with an internal thread structure that matches the external thread structure of the annular structure (11).

7. The magnetic intravenous catheter external fixation device according to claim 6, characterized in that: The connecting assembly (10) comprises a conduit passage (13) and a conduit fastening mechanism (14); when the connecting assembly (10) locks the first conduit limiting group (1) and the second conduit limiting group (3) together, the conduit passage (13) is sequentially connected to the limiting hole (5) along the extension direction of the limiting hole (5); the conduit fastening mechanism (14) comprises a plurality of groups of U-shaped elastic metal wires (15) sequentially distributed along the circumference of the cylindrical cavity (12), wherein one of the U-shaped elastic metal wires (15) is arranged at The inner wall of the annular structure (11), and the open end of the U-shaped elastic metal wire (15) is fixed to the inner wall of the annular structure (11); the open ends of the other multiple U-shaped elastic metal wires (15) extend from the inside to the outside along the radial direction of the cylindrical cavity (12) and are fixed to the inner wall of the catheter channel (13); the curved parts of the U-shaped elastic metal wires (15) belonging to the same catheter fastening mechanism (14) are stacked in sequence to form multiple continuous catheter guiding paths, so as to jointly constitute the elastic clamping part of the venous catheter.

8. The magnetic intravenous catheter external fixation device according to claim 2, characterized in that: The magnetic intravenous catheter extracorporeal fixation device further comprises a positioning mechanism (16), wherein the positioning mechanism (16) comprises a plurality of protruding structures (17) and a plurality of recessed structures (18), wherein the plurality of protruding structures (17) are arranged at a connection interface on the first catheter limiting group (1) facing the second catheter limiting group (3), and the plurality of recessed structures (18) are arranged at a connection interface on the second catheter limiting group (3) facing the first catheter limiting group (1); the plurality of protruding structures (17) are distributed at equal intervals along the first linear direction, and the plurality of recessed structures (18) are distributed at equal intervals along the first linear direction, and the spacing between two adjacent protruding structures (17) is equal to the spacing between two adjacent recessed structures (18); and each of the protruding structures (17) and each of the recessed structures (18) can be adapted to each other.

9. The magnetic intravenous catheter external fixation device according to claim 1, characterized in that: The magnetic intravenous catheter extracorporeal fixation device further comprises a bonding component (19), wherein the bonding component (19) is arranged on an outer mounting surface of the second catheter limiting group (3) away from the first catheter limiting group (1).

10. The magnetic intravenous catheter external fixation device according to claim 1, characterized in that: The magnetic intravenous catheter extracorporeal fixation device further comprises a bonding component (19), wherein the bonding component (19) comprises a first bonding matrix (20) and a second bonding matrix (21) which are arranged in sequence and spaced apart in a horizontal direction, wherein the first bonding matrix (20) is arranged on the side of the first catheter limiting group (1) facing the human skin, and the second bonding matrix (21) is arranged on the side of the second catheter limiting group (3) facing the human skin.

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