A catheter securement device

Abstract

This utility model relates to a catheter fixation device, including a fixing ring seat, a rotating ring cover, a locking mechanism, and a catheter auxiliary fixation mechanism. The rotating ring cover is rotatably connected to the fixing ring seat. A locking mechanism is provided between the rotating ring cover and the fixing ring seat for the rotating ring cover to rotate relative to the fixing ring seat and be locked in any position on the fixing ring seat. The rotating ring cover has a central hole for the catheter to pass through. The catheter auxiliary fixation mechanism is located on one side of the fixing ring and is used to fix the catheter. Its innovation lies in the inclusion of an inner clamp, which is composed of multiple inner clamp sliders with identical structures. These inner clamp sliders are arranged along the circumference of the fixing ring seat and are rotatably connected to it. Simultaneously, the upper ends of the inner clamp sliders are slidably engaged with the rotating ring cover. This utility model is not only convenient to use, eliminating the need for suture binding to fix the catheter, but also creates a relatively closed space during use, reducing the risk of infection.

Description

Technical Field

[0001] This utility model relates to a fixation device, specifically a catheter fixation device, and belongs to the field of medical device technology. Background Technology

[0002] Currently, patients often require the placement of various medical catheters, such as drainage catheters and angiography catheters, due to postoperative care needs. These catheters are partially located outside the body and also need to be fixed in predetermined positions on the body surface to ensure that the catheters do not move or become misaligned, reduce pulling, and prevent unplanned removal.

[0003] Traditional fixation methods often involve skin sutures or medical tape. However, skin sutures are time-consuming, cause pain to the patient, and may even lead to infection and vascular damage. Medical tape, on the other hand, is easily affected by factors such as sebum secretion and sweating, which weakens its adhesiveness and results in insecure fixation. Furthermore, tape may bend or fold, affecting its effectiveness.

[0004] Patent CN1997414A discloses a self-suture fixation device for catheters. This prior art catheter fixation automatically deploys one or more sutures to secure the catheter, eliminating the need for manual fixation by a physician. This technology uses knotted sutures to bind and secure the catheter. Once fixed, if loosening and re-fixation is required, the sutures must be cut and the entire device or a large portion thereof replaced. Manually loosening the sutures without replacing the device is complex and difficult. Furthermore, using sutures as fixation components makes assembly complex and difficult during production, resulting in low production efficiency and increased production costs.

[0005] In existing catheter fixation devices, the sliding ring is an overall ring-shaped structure, and its fixation to the annular fixation base is achieved through compression. This poses a risk of detachment during use. Furthermore, this structure includes at least one flexible clamp connecting the annular fixation base and the annular sliding ring. In other words, in existing technology, the catheter is fixed by rotating the annular sliding ring, which drives the clamp to secure it. Even after the catheter is fixed, it cannot completely cover the central hole of the annular sliding ring, leaving it open to the external environment. Prolonged wear can easily contaminate the absorbent pad located below the clamp and inside the annular fixation base, significantly increasing the chance of wound infection. At the same time, the clamp can easily snag on the edge of the absorbent pad during tightening, causing it to wrinkle and deform. While fixing the catheter, it cannot press the absorbent pad tightly against the wound, greatly reducing the effectiveness of the absorbent pad, affecting patient comfort and increasing the risk of infection. Utility Model Content

[0006] The purpose of this invention is to provide a catheter fixation device that is not only easy to use and does not require suture binding to fix the catheter, but also forms a relatively closed space during use, making it less likely to cause infection.

[0007] To achieve the above objectives, the technical solution of this utility model is: a catheter fixing device, comprising a fixing ring seat, a rotating ring cover, a locking mechanism, and a catheter auxiliary fixing mechanism. The rotating ring cover is rotatably connected to the fixing ring seat. A locking mechanism is provided between the rotating ring cover and the fixing ring seat for the rotating ring cover to rotate relative to the fixing ring seat and be locked in any position on the fixing ring seat. The rotating ring cover has a central hole for the catheter to pass through. The catheter auxiliary fixing mechanism is located on one side of the fixing ring seat and is used to fix the catheter. Its innovation lies in that it also includes an inner clamp. The inner hoop is composed of multiple identical inner hoop sliders, which are arranged along the circumference of the fixed ring seat and rotatably connected to it. Simultaneously, the upper ends of the multiple inner hoop sliders are also slidably engaged with the rotating ring cover. Rotate the rotating ring cover clockwise, causing the multiple inner hoop sliders to converge toward the center of the rotating ring cover until the inner hoop fixes the guide tube inside the central hole of the rotating ring cover, and the space below the inner hoop is physically isolated from the external environment through the inner hoop. The locking mechanism controls the rotating ring cover to rotate counterclockwise, and multiple inner hoop sliders slide away from the center of the rotating ring cover and are in an open state, thus releasing the fixation of the guide tube in the center hole of the rotating ring cover.

[0008] In the above technical solution, the fixed ring seat has a plurality of rotating countersunk holes in the circumferential direction, and the rotating ring cover has a plurality of grooves in the circumferential direction to limit the sliding trajectory and sliding stroke of the inner hoop slider. The lower end of the inner hoop slider is provided with a rotating column, and the upper end of the inner hoop slider is provided with a sliding column. The rotating pins of each inner hoop slider are respectively set in the corresponding rotating countersunk holes on the fixed ring seat, so that the inner hoop slider and the fixed ring seat form a rotational fit. At the same time, the sliding pin of each inner hoop slider is in sliding fit with the groove of the rotating ring cover, so that the inner hoop slider slides along the groove of the rotating ring cover under the action of the sliding pin.

[0009] In the above technical solution, the free end of the inner hoop slider is provided with an anti-slip groove to increase the friction between the slider and the guide tube and improve the clamping effect.

[0010] In the above technical solution, the outer side of the inner hoop slider is provided with an arc-shaped convex surface, and the front part of the inner side and near the free end is provided with an arc-shaped concave surface. When multiple inner hoop sliders are in a retracted state, the arc-shaped convex surface of one inner hoop slider is completely in contact with the arc-shaped concave surface of the other inner hoop slider. At this time, the inner hoop slider is in the retracted limit position.

[0011] In the above technical solution, a limiting step is provided at the tail of the inner side of the inner hoop slider and away from the free end. When multiple inner hoop sliders are in the open state, the free end of one of the two adjacent inner hoop sliders is positioned and engaged with the limiting step of the other inner hoop slider, so that the inner hoop slider is in the open limit position.

[0012] In the above technical solution, the bottom of the free end of the inner hoop slider is provided with a chamfer to prevent the inner hoop from pinching and damaging the surface layer of the absorbent pad located below the inner hoop during the closing process.

[0013] In the above technical solution, the locking mechanism includes a latch and an unlocking button integrated together. The latch has ratchet teeth on its outer side and an elastic strip on its inner side. The fixed ring seat is provided with a locking groove, and the rotating ring cover has a ratchet groove. The latch is located within a latch receiving groove, and a rotating pin at one end of the latch rotatably engages with a rotating hole within the latch receiving groove. The ratchet teeth of the latch mesh with the ratchet groove of the rotating ring cover. The unlocking key is located on the outside of the rotating ring cover. When the unlock button is pressed, the latch rotates relative to the fixed ring seat under the action of the elastic bar. The ratchet of the latch separates from the ratchet groove of the rotating ring cover and releases the lock on the rotating ring cover, allowing the rotating ring cover to rotate counterclockwise relative to the fixed ring seat.

[0014] In the above technical solution, the rotating ring cover is provided with a buckle, and the buckle is rotatably engaged with the annular groove of the fixed ring seat.

[0015] In the above technical solution, the catheter auxiliary fixing mechanism includes a buckle seat and an outer clamp for assisting in fixing the catheter. The buckle seat is located on one side of the fixing ring seat, and the buckle block of the outer clamp is connected to the buckle seat. The outer clamp is also provided with several buckle teeth.

[0016] In the above technical solution, a C-shaped absorbent pad is provided inside the fixing ring seat and below the inner hoop. The absorbent pad contains antibacterial and anti-inflammatory silver ions. The bottom of the fixing ring seat is also provided with a skin adhesive layer, and the back of the skin adhesive layer is provided with a split and separable upper release paper and a lower release paper.

[0017] The positive effects of this utility model are: after adopting the conduit fixing device of this utility model, since this utility model also includes an inner clamp, The inner hoop is composed of multiple identical inner hoop sliders, which are arranged along the circumference of the fixed ring seat and rotatably connected to it. Simultaneously, the upper ends of the multiple inner hoop sliders are also slidably engaged with the rotating ring cover. Rotate the rotating ring cover clockwise, causing the multiple inner hoop sliders to converge toward the center of the rotating ring cover until the inner hoop fixes the guide tube inside the central hole of the rotating ring cover, and the space below the inner hoop is physically isolated from the external environment through the inner hoop. The locking mechanism controls the rotating ring cover to rotate counterclockwise, causing multiple inner hoop sliders to slide away from the center of the rotating ring cover and into an open state, thus releasing the fixation of the guide tube inside the central hole of the rotating ring cover. Therefore, this invention is not only convenient to use, but also eliminates the need for sutures to bind and fix the catheter. Furthermore, the rotating cap and fixing ring will not detach after assembly. When the inner clamp tightens to hold the catheter, it also physically isolates the space below the inner clamp from the external environment, forming a relatively closed space. Even with prolonged wear, the absorbent pad inside the fixing ring will not be contaminated, significantly reducing the chance of wound infection. Additionally, the inner clamp will not snag on the edge of the absorbent pad during tightening, preventing wrinkles and deformation. This ensures that the inner clamp, while fixing the catheter, also presses down on the absorbent pad, keeping it tightly against the wound and maximizing its effectiveness. This improves patient comfort and reduces the risk of infection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a specific embodiment of the present utility model; Figure 2 This is a three-dimensional exploded view of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the fixed ring seat, inner hoop, and locking mechanism of this utility model; Figure 4 This is a three-dimensional structural schematic diagram of the inner hoop slider of this utility model; Figure 5 This is a three-dimensional structural diagram of the fixing ring seat of this utility model; Figure 6 This is a schematic diagram of the assembly structure of the rotating ring cover and locking mechanism of this utility model; Figure 7 This is a three-dimensional structural diagram of the locking mechanism of this utility model; Figure 8 This is a three-dimensional structural diagram of the outer hoop of this utility model; Figure 9 This is a three-dimensional structural diagram of the skin adhesive layer of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but it is not limited thereto.

[0020] like Figure 1 ,2 As shown in figures 3, 4, 5, 6, 7, 8, and 9, a catheter fixing device includes a fixing ring seat 1, a rotating ring cover 3, a locking mechanism 4, and a catheter auxiliary fixing mechanism 5. The rotating ring cover 3 is rotatably connected to the fixing ring seat 1. A locking mechanism 4 is provided between the rotating ring cover 3 and the fixing ring seat 1 for the rotating ring cover 3 to rotate relative to the fixing ring seat 1 and be locked in any position on the fixing ring seat 1. The rotating ring cover 3 has a central hole for the catheter to pass through. The catheter auxiliary fixing mechanism 5 is located on one side of the fixing ring seat 1 and is used to fix the catheter. It also includes an inner clamp 2. The inner hoop 2 is composed of multiple inner hoop sliders 21 with identical structures. The multiple inner hoop sliders 21 are arranged along the circumference of the fixed ring seat 1 and are rotatably connected to the fixed ring seat 1. At the same time, the upper ends of the multiple inner hoop sliders 21 are also slidably engaged with the rotating ring cover 3. Rotate the rotating ring cover 3 clockwise, causing the multiple inner hoop sliders 21 to converge toward the center of the rotating ring cover 3, until the inner hoop 2 fixes the guide tube inside the center hole of the rotating ring cover 3, and the space below the inner hoop 2 is physically isolated from the external environment through the inner hoop 2. The locking mechanism 4 controls the rotating ring cover 3 to rotate counterclockwise, and multiple inner hoop sliders 21 slide away from the center of the rotating ring cover 3 and are in an open state, thus releasing the fixation of the guide tube in the center hole of the rotating ring cover 3.

[0021] Furthermore, such as Figure 2 , 3 As shown in Figures 4, 5, and 6, in order to enable the inner hoop to rotate relative to the fixed ring seat and slide relative to the rotating ring cover, so that the multiple inner hoop sliders can be in two different states of being closed or open, the fixed ring seat 1 is provided with several rotating countersunk holes 11 in the circumferential direction, and the rotating ring cover 3 is provided with several radial grooves 31 in the circumferential direction to restrict the sliding trajectory and sliding stroke of the inner hoop slider 21. The lower end of the inner hoop slider 21 is provided with a rotating column 211, and the upper end is provided with a sliding column 212. The rotating pin 211 of each inner ring slider 21 is respectively set in the corresponding rotating countersunk hole 11 on the fixed ring seat 1, so that the inner ring slider 21 and the fixed ring seat 1 form a rotational engagement. At the same time, the sliding pin 212 of each inner ring slider 21 is in sliding engagement with the sliding groove 31 of the rotating ring cover 3, so that the inner ring slider 21 slides along the sliding groove 31 of the rotating ring cover 3 under the action of the sliding pin 212.

[0022] Furthermore, such as Figure 4 As shown, in order to increase the clamping force of the inner clamping slider on the conduit and prevent the conduit from rotating and affecting the fixing effect, the free end of the inner clamping slider 21 is provided with an anti-slip groove 213 to increase the friction between the inner clamping slider and the conduit and improve the clamping effect.

[0023] Furthermore, such as Figure 2 , 3 As shown in Figure 4, in order to enable adjacent inner hoop sliders to constrain each other and ensure the smoothness and unobstructed flow of the inner hoop sliders during the closing process, the outer side of the inner hoop slider 21 is provided with an arc-shaped convex surface, and the front part of the inner side and near the free end is provided with an arc-shaped concave surface. When multiple inner hoop sliders 21 are in a closed state, the arc-shaped convex surface of one inner hoop slider of two adjacent inner hoop sliders 21 is completely in contact with the arc-shaped concave surface of the other inner hoop slider. At this time, the inner hoop slider is in the closing limit position.

[0024] Furthermore, such as Figure 2 , 3 As shown in Figure 4, in order to ensure that all inner hoop sliders do not interfere with each other after opening and can be completely hidden, a limiting step 214 is provided at the tail of the inner side of the inner hoop slider 21 away from the free end. When multiple inner hoop sliders 21 are in the open state, the free end of one inner hoop slider of two adjacent inner hoop sliders 21 is positioned and engaged with the limiting step 214 of the other inner hoop slider, so that the inner hoop slider is in the open limit position.

[0025] Specifically, when this utility model is not in conjunction with the conduit and the rotating ring cover 3 is rotated clockwise, each inner hoop slider 21 rotates relative to the fixed ring seat 1 under the action of the rotating column 211. At the same time, the sliding column 212 of the inner hoop slider 21 slides along the sliding groove of the rotating ring cover 3, so that the arc-shaped convex surface of one inner hoop slider 21 moves along the arc-shaped concave surface of the other inner hoop slider until the inner hoop slider moves to the retracted limit position. At this time, the inner hoop slider 21 is in a retracted state. When this utility model is used with a conduit and the conduit passes through the center hole of the rotating ring cover 3, the rotating ring cover 3 is rotated clockwise, and all the inner hoop sliders 21 are retracted until the inner hoop sliders are retracted to fix the conduit. Conversely, if the conduit is released from its fixation, under the control of the locking mechanism 4, the rotating ring cover 3 is rotated counterclockwise. Each inner hoop slider 21 rotates relative to the fixed ring seat 1 under the action of the rotating column 211. At the same time, the sliding column 212 of the inner hoop slider 21 slides in the opposite direction along the groove of the rotating ring cover 3, so that the arc-shaped convex surface of one of the two adjacent inner hoop sliders 21 moves in the opposite direction along the arc-shaped concave surface of the other inner hoop slider, until the conduit is released from its fixation. If the inner hoop slider continues to move and its free end moves to the positioning step 214 of its adjacent inner hoop slider for positioning and engagement (overlapping on the positioning step), then the inner hoop slider is in the open limit position (the inner hoop slider is completely hidden between the fixed ring seat and the rotating ring cover).

[0026] Furthermore, such as Figure 4As shown, in order to prevent the inner hoop slider from being clamped by the surface of the absorbent pad located below the inner hoop and set in the inner hole of the fixed ring seat during the retraction process, which would damage the absorbent pad and affect the water absorption effect, the bottom of the free end of the inner hoop slider 21 is provided with a chamfer 215 to prevent the inner hoop 2 from being clamped and damaged by the surface of the absorbent pad located below the inner hoop 2 during the retraction process.

[0027] Furthermore, such as Figure 5 , 6 As shown in Figure 7, to facilitate operation and enable the rotating ring seat to lock at any position during its rotation relative to the fixed ring seat, and to ensure that it can only be unlocked through the locking mechanism, the locking mechanism 4 includes a latch 41 and an unlocking key 44 integrated together. The latch 41 has a ratchet 42 on its outer side and an elastic strip 43 on its inner side. The fixed ring seat 1 is provided with a locking groove 12, and the rotating ring cover 3 has a ratchet groove 32. The latch 41 is disposed in the latch receiving groove 12, and a rotating pin 411 at one end of the latch 41 rotates and engages with a rotating hole in the latch receiving groove 12. The ratchet 42 of the latch 41 engages with the ratchet groove 32 of the rotating ring cover 3. The unlocking key 44 is located on the outside of the rotating ring cover 3. Under the action of the locking mechanism 4, the rotating ring cover 3 can be locked in any position after rotating relative to the fixed ring seat 1. Only by simultaneously pressing the unlock button 44 and rotating the rotating ring cover 3 can the lock be released, allowing the rotating ring seat 3 to rotate in the opposite direction relative to the fixed ring seat 1. Specifically, Press the unlock button 44. Under the action of the elastic bar 43, the latch 41 rotates relative to the fixed ring seat 1. The ratchet 42 of the latch 41 separates from the ratchet groove 32 of the rotating ring cover 3 and releases the lock on the rotating ring cover 3, so that the rotating ring cover 3 can rotate counterclockwise relative to the fixed ring seat 1.

[0028] Furthermore, such as Figure 6 As shown, in order to further improve the structural rationality and facilitate quick assembly, so that the rotating ring cover can rotate relative to the fixed ring seat, the rotating ring cover 3 is provided with a buckle 33, and the buckle 33 is rotatably engaged with the annular groove of the fixed ring seat 1.

[0029] Furthermore, such as Figure 1 , 8 As shown, in order to achieve auxiliary fixation of the catheter and effectively prevent the catheter from getting tangled or knotted, the catheter auxiliary fixation mechanism 5 includes a buckle seat 51 and an outer clamp 52 for auxiliary fixation of the catheter. The buckle seat 51 is located on one side of the fixing ring seat 1. The buckle block 521 of the outer clamp 52 is connected to the buckle seat 51. The outer clamp 52 is also provided with several buckle teeth 522.

[0030] Specifically, one end of the outer hoop 52 of this utility model is provided with a locking block 521, and an outer hoop buckle 523 is flexibly connected to the locking block 521. The end of the outer hoop buckle 523 away from the locking block 521 is connected to a pull ring 524. When the outer hoop is fixed around the guide tube, the outer hoop buckle 523 is engaged with the buckle tooth 522. When it is necessary to release the engagement, pull down the pull ring 525 to disengage the outer hoop buckle 523 from the buckle tooth 522 and pull out the hoop bar body of the outer hoop 52.

[0031] Furthermore, such as Figure 1 , 2 As shown, in order to achieve antibacterial and anti-inflammatory effects, a C-shaped absorbent pad 6 is provided inside the fixing ring seat 1 and below the inner hoop 2. The absorbent pad 6 contains silver ions. During use, the absorbent pad 6 is directly attached to the skin surface, which can destroy the cell membrane, protein and DNA of bacteria at the wound, thereby inhibiting or killing a variety of common pathogens, reducing the risk of wound infection by bacteria and helping to control wound inflammation.

[0032] Furthermore, such as Figure 9 As shown, to ensure the present invention is securely fixed to the patient's skin and prevents movement, the bottom of the fixing ring 1 is provided with a skin adhesive layer 7. The back of the skin adhesive layer 7 has a split, detachable upper release paper 71 and a lower release paper 72. In actual use, the upper release paper 71 is first peeled off, the fixing ring 1 is then adhered to the skin surface via the skin adhesive layer 7, and the lower release paper 72 is then peeled off to ensure a firm bond.

[0033] Furthermore, the number of inner hoop sliders 21 in this utility model is preferably eight. When multiple inner hoop sliders 21 are retracted, the surface can be fully enclosed, which can also provide a layer of physical protection for the absorbent pad and wounds.

[0034] During the use of this utility model: The conduit is pre-passed through the center hole of the rotating ring cap 3. Rotating the rotating ring cover 3 clockwise causes each inner hoop slider 21 to rotate relative to the fixed ring seat 1 under the action of the rotating column 211. Simultaneously, the sliding column 212 of the inner hoop slider 21 slides along the groove of the rotating ring cover 3, causing the arc-shaped convex surface of one inner hoop slider 21 to move along the arc-shaped concave surface of the other inner hoop slider. This causes multiple inner hoop sliders 21 to simultaneously converge towards the center of the rotating ring cover 3 until the inner hoop 2 fixes the guide tube inside the central hole of the rotating ring cover 3. To release the fixation of the conduit, the locking mechanism 4 needs to be operated. Simultaneously, the unlocking button 44 is pressed and the rotating ring cover 3 is rotated counterclockwise. Each inner hoop slider 21 rotates relative to the fixed ring seat 1 under the action of the rotating column 211. At the same time, the sliding column 212 of the inner hoop slider 21 slides in the opposite direction along the groove of the rotating ring cover 3, so that the arc-shaped convex surface of one inner hoop slider 21 moves in the opposite direction along the arc-shaped concave surface of the other inner hoop slider. Multiple inner hoop sliders 21 slide away from the center of the rotating ring cover 3 and are in an open state until the fixation of the conduit is released. If the inner hoop slider continues to move and its free end moves to the limiting step 214 of its adjacent inner hoop slider for positioning and matching (overlapping on the limiting step), then the inner hoop slider is in the open limit position (the inner hoop slider is completely hidden between the fixed ring seat and the rotating ring cover).

[0035] This invention is not only convenient to use, but also eliminates the need for sutures to bind and fix the catheter. Furthermore, the rotating ring cap and the fixing ring seat will not fall off after assembly. When the inner hoop tightens and clamps the catheter, it also physically isolates the space below the inner hoop from the external environment, forming a relatively closed space. Even if the patient wears it for a long time, it will not contaminate the absorbent pad inside the fixing ring seat, greatly reducing the chance of wound infection. At the same time, the inner hoop of this invention will not catch on the edge of the absorbent pad during the tightening process, preventing it from wrinkling or deforming. This ensures that the inner hoop can fix the catheter while pressing the absorbent pad tightly against the wound, ensuring that the absorbent pad can fully perform its function, improving patient comfort and reducing the risk of infection. Furthermore, since the bottom of the free end of the inner hoop is designed with a chamfered structure, it further ensures that the inner hoop will not pinch the absorbent pad when tightened, and can also press the absorbent pad to fit the wound surface after tightening, which can effectively absorb surface liquid and keep the wound dry and comfortable. This utility model also adds silver ions to the absorbent pad, which can effectively inhibit bacterial growth and prevent and control infection.

[0036] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A catheter fixing device, comprising a fixing ring seat (1), a rotating ring cover (3), a locking mechanism (4), and a catheter auxiliary fixing mechanism (5), wherein the rotating ring cover (3) is rotatably connected to the fixing ring seat (1), and a locking mechanism (4) is provided between the rotating ring cover (3) and the fixing ring seat (1) for the rotating ring cover (3) to rotate relative to the fixing ring seat (1) and be constrained to any locking position on the fixing ring seat (1), the rotating ring cover (3) is provided with a central hole for the catheter to pass through, and the catheter auxiliary fixing mechanism (5) is provided on one side of the fixing ring seat (1) for fixing the catheter, characterized in that: It also includes the inner hoop (2). The inner hoop (2) is composed of multiple inner hoop sliders (21) with the same structure. The multiple inner hoop sliders (21) are arranged along the circumference of the fixed ring seat (1) and are rotatably connected to the fixed ring seat (1). At the same time, the upper ends of the multiple inner hoop sliders (21) are also slidably engaged with the rotating ring cover (3). Rotate the rotating ring cover (3) clockwise to cause the multiple inner hoop sliders (21) to converge toward the center of the rotating ring cover (3) until the inner hoop (2) fixes the guide tube in the center hole of the rotating ring cover (3), and the space below the inner hoop (2) is physically isolated from the external environment through the inner hoop (2). The locking mechanism (4) controls the rotating ring cover (3) to rotate counterclockwise, and multiple inner ring sliders (21) slide away from the center of the rotating ring cover (3) and are in an open state, thereby releasing the fixation of the conduit in the center hole of the rotating ring cover (3).

2. The catheter fixation device according to claim 1, characterized in that: The fixed ring seat (1) has several rotating countersunk holes (11) in the circumferential direction, and the rotating ring cover (3) has several grooves (31) in the circumferential direction that limit the sliding trajectory and sliding stroke of the inner hoop slider (21). The lower end of the inner hoop slider (21) is provided with a rotating column (211), and the upper end of the slider is provided with a sliding column (212). The rotating pin (211) of each inner hoop slider (21) is respectively set in the corresponding rotating countersunk hole (11) on the fixed ring seat (1), so that the inner hoop slider (21) and the fixed ring seat (1) form a rotational fit. At the same time, the sliding pin (212) of each inner hoop slider (21) is in sliding fit with the sliding groove (31) of the rotating ring cover (3), so that the inner hoop slider (21) slides along the sliding groove (31) of the rotating ring cover (3) under the action of the sliding pin (212).

3. The catheter fixation device according to claim 1, characterized in that: The free end of the inner hoop slider (21) is provided with an anti-slip groove (213) to increase the friction between the slider and the guide tube and improve the clamping effect.

4. The catheter fixation device according to claim 1, characterized in that: The outer side of the inner hoop slider (21) is provided with an arc-shaped convex surface, and the front part of the inner side and near the free end is provided with an arc-shaped concave surface. When multiple inner hoop sliders (21) are in a closed state, if the arc-shaped convex surface of one of the two adjacent inner hoop sliders (21) is completely attached to the arc-shaped concave surface of the other inner hoop slider, then the inner hoop slider is in the closed limit position.

5. The catheter fixation device according to claim 1, characterized in that: The inner side of the inner hoop slider (21) is provided with a limiting step (214) at the tail end away from the free end. When multiple inner hoop sliders (21) are in the open state, the free end of one of the two adjacent inner hoop sliders (21) is positioned and engaged with the limiting step (214) of the other inner hoop slider, so that the inner hoop slider is in the open limit position.

6. The catheter fixation device according to claim 1, characterized in that: The bottom of the free end of the inner hoop slider (21) is provided with a chamfer (215) to prevent the inner hoop (2) from pinching and damaging the surface of the absorbent pad located below the inner hoop (2) during the closing process.

7. The catheter fixation device according to claim 1, characterized in that: The locking mechanism (4) includes a latch (41) and an unlocking key (44) that are integrated together. The latch (41) has a ratchet (42) on the outside and an elastic strip (43) on the inside. The fixed ring seat (1) is provided with a locking receiving groove (12), and the rotating ring cover (3) has a ratchet groove (32). The latch (41) is located in the latch receiving groove (12), and a rotating pin (411) at one end of the latch is rotatably engaged with a rotating hole in the latch receiving groove (12). The ratchet (42) of the latch (41) engages with the ratchet groove (32) of the rotating ring cover (3). The unlocking key (44) is located on the outside of the rotating ring cover (3). Press the unlock button (44), and under the action of the elastic bar (43), the latch (41) rotates relative to the fixed ring seat (1). The ratchet (42) of the latch (41) separates from the ratchet groove (32) of the rotating ring cover (3) and releases the lock on the rotating ring cover (3), so that the rotating ring cover (3) can rotate counterclockwise relative to the fixed ring seat (1).

8. The catheter fixation device according to claim 1, characterized in that: The rotating ring cover (3) is provided with a buckle (33), and the buckle (33) is rotatably engaged with the annular groove of the fixed ring seat (1).

9. The catheter fixation device according to claim 1, characterized in that: The catheter auxiliary fixing mechanism (5) includes a buckle seat (51) and an outer clamp (52) for assisting in fixing the catheter. The buckle seat (51) is located on one side of the fixing ring seat (1). The buckle block (521) of the outer clamp (52) is connected to the buckle seat (51). The outer clamp (52) is also provided with several buckle teeth (522).

10. The catheter fixation device according to claim 1, characterized in that: A C-shaped absorbent pad (6) is provided inside the fixing ring seat (1) and below the inner hoop (2). The absorbent pad (6) contains antibacterial and anti-inflammatory silver ions. The bottom of the fixed ring seat (1) is also provided with a skin adhesive layer (7), and the back of the skin adhesive layer (7) is provided with a split and separable upper release paper (71) and a lower release paper (72).

Images