A central venous catheter securement device

Abstract

The utility model provides a kind of central venous catheter fixing device, including flexible adhesive layer, flexible skin layer and rotating mechanism.The flexible adhesive layer is used to paste on patient skin.The flexible skin layer is arranged at the central part of flexible adhesive layer, for being combined with patient skin.The rotating mechanism includes fixed cylinder and rotating cylinder, fixed cylinder is sequentially penetrated flexible adhesive layer and flexible skin layer, and is fixedly connected with flexible skin layer, the rotating cylinder is coaxially rotationally arranged in fixed cylinder, central venous catheter can penetrate rotating cylinder above.The central venous catheter fixing device proposed in the utility model can be enclosed to protect the part of central venous catheter piercing into skin, can reduce the risk caused by external force pulling and being accidentally touched, reduce the damage to patient skin.At the same time, it can also facilitate medical staff to disinfect operation.

Description

Technical Field

[0001] This application relates to the field of medical assistive device technology, and more specifically, to a central venous catheter fixation device. Background Technology

[0002] The content in this section provides only background information related to this application and may not constitute prior art.

[0003] A central venous catheter (CVC) is a venous access used for the treatment and monitoring of patients. It is typically placed in a large vein, such as the subclavian vein, femoral vein, or internal jugular vein, with its tip located in the superior or inferior vena cava. Currently, after successful placement, the catheter portion at the insertion site is usually secured with a transparent dressing, with the catheter tip exposed outside the dressing. This exposed tip makes the dressing prone to peeling at the edges when subjected to external force, leading to poor adhesion between the dressing, catheter, and skin, and a potential risk of CVC infection. Furthermore, peeling at the dressing edges can cause the catheter to kink under stress, resulting in obstructed intravenous flow.

[0004] To address the aforementioned issues, Chinese patent document CN219963709U discloses a central venous catheter tip fixation device, comprising a film-applying component and a fixing tube. The film-applying component has an adhesive surface and a fixing surface on both sides, with a fixing seat and a secondary adhesive film application area on the fixing surface. The fixing tube is a hollow support tube that can be freely bent and shaped, with a fixed end and a free end at each end. The fixed end is located on the fixing seat, and the side wall of the hollow support tube has an opening extending along the fixing tube. When the tip of the central venous catheter is subjected to tensile forces at different angles, the wire coil catheter can bend and twist at multiple angles along with the tip of the central venous catheter, preventing the central venous catheter from kinking.

[0005] However, the aforementioned related technologies still have at least the following drawbacks: First, in the technical solution disclosed in the existing patent, the adhesive surface of the patch and the secondary adhesive tape are used to fix the central venous catheter to the patient's skin. Since the central venous catheter is used for a long time, the adhesive surface and the secondary adhesive tape are in long-term, large-area contact with the human skin, which can easily cause skin damage such as redness, swelling, and itching. Second, because the central venous catheter is used for a long time, medical staff need to regularly disinfect the central venous catheter and the skin around it. The disinfection area is a circular area within a certain diameter centered on the central venous catheter. Within this area, the skin is mixed with residual adhesive, which is not conducive to disinfection. The adhesive surface and the secondary adhesive tape need to be replaced, and the process of removing the adhesive surface and the secondary adhesive tape can cause damage and discomfort to the patient's skin. The replacement of the adhesive surface and the secondary adhesive tape in the technical solution disclosed in the existing patent document is also inconvenient, and since the central control support tube needs to be considered for reuse, the central control support tube will also affect the disinfection operation during the disinfection process. Summary of the Invention

[0006] To address the aforementioned technical problems, the purpose of this application is to provide a central venous catheter fixation device that encloses and protects the site where the central venous catheter is inserted into the skin. This reduces the risk of injury from external pulling or accidental contact, minimizes the area of ​​adhesion to the skin, and reduces damage to the patient's skin. Furthermore, it facilitates disinfection procedures for medical personnel, significantly improving disinfection efficiency.

[0007] The objective of this application is achieved through the following technical solution:

[0008] A central venous catheter fixation device, comprising:

[0009] A flexible adhesive layer for adhesion to a patient's skin;

[0010] A flexible skin-friendly layer is disposed at the center of the flexible adhesive layer for adhering to the patient's skin.

[0011] A rotating mechanism includes a fixed cylinder and a rotating cylinder. The fixed cylinder passes through a flexible adhesive layer and a flexible skin-friendly layer in sequence and is fixedly connected to the flexible skin-friendly layer. The rotating cylinder is coaxially rotatably disposed inside the fixed cylinder, and a central venous catheter can pass through the rotating cylinder.

[0012] In some possible embodiments, one end of the rotating cylinder is provided with an elastic clip for clamping the central venous catheter.

[0013] Furthermore, the elastic jacket includes multiple elastic plates, which are circumferentially and evenly arranged at one end of the rotating cylinder, forming a conical cylinder structure.

[0014] In some possible embodiments, an annular groove is provided circumferentially on the inner wall of the fixed cylinder, and a sliding ring is provided in the annular groove. The sliding ring can slide freely along the circumferential direction of the annular groove and is connected to the rotating cylinder.

[0015] In some possible embodiments, an elastic clamping frame is provided on the side of the flexible adhesive layer away from the flexible skin-friendly layer, and elastic restraint straps are provided at both ends of the elastic clamping frame.

[0016] In some possible embodiments, the elastic clamping frame has a slot for securing a central venous catheter.

[0017] In some possible embodiments, the slot includes a large slot and a small slot that are in communication with each other.

[0018] In some possible embodiments, the resilient clamping frame is provided with a transparent cover.

[0019] In some possible embodiments, the flexible skin-friendly layer has a circular structure.

[0020] In some possible embodiments, the rotating cylinder includes an outer cylinder, an inner cylinder, and an annular gasket. The outer cylinder is coaxially rotatably disposed inside the fixed cylinder. One end of the inner cylinder is connected to the annular gasket, and the other end passes through the outer cylinder. The inner cylinder and the outer cylinder are threadedly connected. The center of the annular gasket is located on the axis of the inner cylinder, and the annular gasket can abut against the end face of the outer cylinder.

[0021] Preferably, the flexible adhesive layer and the flexible skin-friendly layer have overlapping corresponding through holes, and the fixing cylinder passes through the through holes in sequence.

[0022] More preferably, overlapping and corresponding separation openings are provided on the flexible adhesive layer and the flexible skin-friendly layer, and the separation openings are connected to the through holes.

[0023] After adopting the above technical solution, this utility model has at least the following beneficial effects:

[0024] 1. The rotating mechanism of this invention is mainly used to fix a central venous catheter. The flexible skin-friendly layer is mainly used to adhere to human skin, and the flexible adhesive layer is used to fix the flexible skin-friendly layer to the skin. The flexible skin-friendly layer and the flexible adhesive layer can fix the rotating mechanism, thereby achieving the purpose of fixing the central venous catheter. The aforementioned flexible skin-friendly layer does not contain adhesives or other substances that irritate the skin. Most of the human skin is in contact with the flexible skin-friendly layer, and only a small portion of the flexible adhesive layer adheres to the skin. Furthermore, this adhered portion is not within the scope of sterilization. Therefore, it can reduce the adhesion area and avoid large areas of long-term adhesion to the skin, thus preventing damage to the patient's skin.

[0025] 2. During regular disinfection, the flexible adhesive and skin-friendly layer can be removed; only the flexible adhesive layer needs to be replaced, which is very convenient. The area of ​​skin requiring disinfection is the area covered by the flexible skin-friendly layer. Therefore, there is no adhesive within this coverage area, avoiding mixing of adhesive with disinfectant, allowing medical staff to disinfect more conveniently and effectively.

[0026] 3. The rotating mechanism provided in this utility model can keep the central venous catheter relatively fixed. During processes such as peeling off the flexible adhesive layer and performing skin disinfection, the fixed cylinder rotates relative to the rotating cylinder, that is, the rotating cylinder remains relatively stationary, which can avoid large relative displacement of the central venous catheter.

[0027] 4. The elastic clamping frame provided by this utility model can surround and protect the area where the central venous catheter is inserted into the skin, reducing the risk of being pulled by external forces or accidentally touched. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of a three-dimensional cross-sectional structure according to an embodiment of this application;

[0030] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 This is a schematic diagram of the card slot structure in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the installation structure of the flexible skin-friendly layer in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the rotating mechanism in the embodiments of this application;

[0034] Figure 7 This is a schematic diagram of the structure of the fixed cylinder in an embodiment of this application.

[0035] Icons: 1-Flexible adhesive layer; 2-Flexible skin-friendly layer; 3-Fixing cylinder; 4-Rotating cylinder; 401-Outer cylinder; 402-Inner cylinder; 403-Annular gasket; 5-Elastic sleeve; 501-Elastic sheet; 6-Annular groove; 7-Sliding ring; 8-Elastic clamping frame; 9-Card slot; 901-Large groove; 902-Small groove; 10-Transparent cover; 11-Elastic restraint band; 12-Central venous catheter; 13-Dissection port. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Example

[0037] The following is for reference Figures 1 to 7 This application will be described in further detail.

[0038] Reference Figure 1 , Figure 2 and Figure 5 This embodiment proposes a central venous catheter fixation device, including a flexible adhesive layer 1, a flexible skin-friendly layer 2, and a rotating mechanism for fixing a central venous catheter 12. The flexible adhesive layer 1 is adhered to the patient's skin. The flexible skin-friendly layer 2 is disposed at the center of the flexible adhesive layer 1 for contact with the patient's skin. The rotating mechanism includes a fixing cylinder 3 and a rotating cylinder 4. The fixing cylinder 3 passes through the flexible adhesive layer 1 and the flexible skin-friendly layer 2 sequentially and is fixedly connected to the flexible skin-friendly layer 2. The rotating cylinder 4 is coaxially rotatably disposed within the fixing cylinder 3, allowing the central venous catheter 12 to pass through it. The rotating mechanism is mainly used to fix the central venous catheter 12 by passing the central venous catheter 12 through the rotating cylinder 4 and fixing it within the rotating cylinder 4. Thus, after the flexible adhesive layer 1 and the flexible skin-friendly layer 2 are torn apart, the rotation of the flexible adhesive layer 1 and the flexible skin-friendly layer 2 relative to the central venous catheter 12 only causes the fixing cylinder 3 to rotate relative to the rotating cylinder 4. The rotating cylinder 4 and the central venous catheter 12 passing through it remain relatively stationary, ensuring that the central venous catheter 12 does not move. The aforementioned flexible skin-friendly layer 2 is mainly used to adhere to human skin, while the flexible adhesive layer 1 is used to fix the flexible skin-friendly layer 2 to the skin. The flexible skin-friendly layer 2 and the flexible adhesive layer 1 can fix the rotating mechanism, thereby achieving the purpose of fixing the central venous catheter 12. The aforementioned flexible skin-friendly layer 2 does not contain adhesives or other substances that irritate the skin. Most of the human skin is in contact with the flexible skin-friendly layer 2, with only a small portion of the flexible adhesive layer 1 adhering to the skin. Furthermore, this adhered portion is not within the scope of sterilization. Therefore, it can reduce the adhesion area and avoid large areas of long-term adhesion to the skin, thus preventing damage to the patient's skin.

[0039] During regular disinfection, the flexible adhesive layer 1 and the flexible skin-friendly layer 2 can be removed. Only the part of the flexible adhesive layer 1 that comes into contact with the skin needs to be replaced, which is very convenient. The area on the skin that needs to be disinfected is the coverage area of ​​the flexible skin-friendly layer 2. Therefore, there is no adhesive within this coverage area, which allows for more convenient and effective disinfection. The aforementioned rotating mechanism keeps the central venous catheter 12 relatively fixed. During processes such as removing the flexible adhesive layer 1 and performing skin disinfection, the fixing cylinder 3 rotates relative to the rotating cylinder 4, meaning the rotating cylinder 4 remains relatively stationary, which can prevent large relative displacement of the central venous catheter 12.

[0040] Please refer to Figure 3 and Figure 6 In this embodiment, an elastic sleeve 5 is provided at one end of the rotating cylinder 4. Specifically, the elastic sleeve 5 includes a plurality of elastic plates 501, which are evenly arranged circumferentially at one end of the rotating cylinder 4, forming a conical cylinder structure. The elastic sleeve 5 is used to clamp the central venous catheter 12. Under the action of elastic potential energy, the plurality of elastic plates 501 exert elastic force on the central venous catheter 12 and clamp the central venous catheter 12 to prevent it from displacing axially.

[0041] Please refer to Figure 3 , 6 Regarding point 7, it is worth noting that in this embodiment, an annular groove 6 is provided circumferentially on the inner wall of the fixed cylinder 3, and a sliding ring 7 is provided in the annular groove 6. The sliding ring 7 can slide freely along the annular groove 6 and is connected to the rotating cylinder 4. The sliding ring 7 rotates circumferentially along the annular groove 6. Since the sliding ring 7 is connected to the rotating cylinder 4, the fixed cylinder 3 and the rotating cylinder 4 can rotate relative to each other.

[0042] Please refer to Figure 1 and Figure 2 In some embodiments of this example, an elastic compression frame 8 is provided on the side of the flexible adhesive layer 1 away from the flexible skin-friendly layer 2, and elastic restraint straps 11 are provided at both ends of the elastic compression frame 8. The elastic compression frame 8 is mainly used to compress the flexible adhesive layer 1 located on the outer periphery of the flexible skin-friendly layer 2, preventing the flexible adhesive layer 1 from curling or lifting. The elastic compression frame 8 is specifically made of silicone material, which has a certain deformation capacity and can deform appropriately during the compression process to better fit the patient's skin and achieve a better compression effect. Furthermore, the elastic compression frame 8 surrounds the part of the flexible skin-friendly layer 2 that contacts the skin, which can protect the external extension of the central venous catheter 12 and its corresponding tip.

[0043] Please refer to Figure 4 In this embodiment, a slot 9 for securing the central venous catheter 12 is provided on the elastic clamping frame 8. The slot 9 is used to secure the outer tube of the central venous catheter 12, as detailed in the following reference. Figure 2 As shown, the elastic compression frame 8 can enclose and protect the part of the central venous catheter 12 that is inserted into the skin, and compress the flexible skin-friendly layer 2 so that it can better fit the skin.

[0044] The slot 9 is used to fix the central venous catheter 12 and prevent it from moving, so as to provide better protection.

[0045] Please refer to Figure 4 In this embodiment, the locking groove 9 includes a large groove 901 and a small groove 902 that are interconnected. The large groove 901 is mainly used to lock the tip of the central venous catheter 12, while the small groove 902 is used to lock the body of the central venous catheter 12. Connecting the large groove 901 and the small groove 902 can limit the tip of the central venous catheter 12 in the axial direction, preventing it from moving in that direction.

[0046] Please refer to Figure 1 and Figure 2 In some embodiments of this example, a transparent cover 10 is provided on the elastic compression frame 8. The transparent cover 10 is mainly used to cover the elastic compression frame 8, which can further protect the central venous catheter 12 inside the elastic compression frame 8. Moreover, the transparent cover 10 can also facilitate medical staff to observe the central venous catheter 12 and the wound where it comes into contact with the patient.

[0047] Please refer to Figure 5 In this embodiment, the flexible skin-friendly layer 2 has a circular structure. The circular structure meets the requirement of disinfecting the skin within a circular area formed by the central venous catheter 12, ensuring that all skin within this area is in contact with the flexible skin-friendly layer 2. This guides medical personnel in disinfecting within this area and avoids the problem of inadequate disinfection caused by adhesive residue. The circular flexible skin-friendly layer 2 is merely one implementation method in this embodiment and is not limited to achieving the desired effect using the structure described above. Other structures can also be used in other embodiments.

[0048] Please refer to Figure 6In some embodiments of this example, the rotating cylinder 4 includes an outer cylinder 401, an inner cylinder 402, and an annular gasket 403. The outer cylinder 401 is coaxially rotatably disposed inside the fixed cylinder 3. One end of the inner cylinder 402 is fixedly connected to the annular gasket 403, and the other end passes through the outer cylinder 401. The inner cylinder 402 and the outer cylinder 401 are threadedly connected. The center of the annular gasket 403 is located on the axis of the inner cylinder 402, and the annular gasket 403 can abut against the end face of the outer cylinder 401. A flexible adhesive layer 1 and a flexible skin-friendly layer 2 can be provided between the annular gasket 403 and the outer cylinder 401. By rotating the inner cylinder 402 to drive the annular gasket 403 to abut against the end face of the outer cylinder 401, the flexible adhesive layer 1 and the flexible skin-friendly layer 2 can be clamped, thereby achieving abutment between the flexible adhesive layer 1 and the flexible skin-friendly layer 2 and the fixed cylinder 3.

[0049] It should be noted that, in order to further facilitate the removal and installation of the flexible adhesive layer 1 and the flexible skin-friendly layer 2, the flexible adhesive layer 1 and the flexible skin-friendly layer 2 are provided with overlapping corresponding through holes (not shown in the figure). The fixing cylinder 3 passes through the through holes in sequence, which can facilitate the connection of the fixing cylinder 3 to the flexible adhesive layer 1 and the flexible skin-friendly layer 2 respectively.

[0050] Furthermore, such as Figure 5 As shown, overlapping separation openings 13 are provided on the flexible adhesive layer 1 and the flexible skin-friendly layer 2, and these separation openings 13 communicate with the aforementioned through-hole. In practice, during subsequent disinfection, the torn flexible adhesive layer 1 needs to be replaced, allowing the corresponding central venous catheter 12 and components of the rotating mechanism to enter the through-hole through the separation opening 13. It should be noted that in other embodiments, the flexible adhesive layer 1 may not be clamped by the annular gasket 403 and the outer cylinder 401; it is inherently adhesive, and its contact portion with the flexible skin-friendly layer 2 can be simply adhered to the flexible skin-friendly layer 2.

[0051] Specifically, in this embodiment, the flexible skin-friendly layer 2 is made of a material similar to cling film, primarily composed of high molecular polymers such as polyethylene (PE), polyvinyl chloride (PVC), or polypropylene (PP). The molecular structure of these materials gives them good elasticity and flexibility. When the flexible skin-friendly layer 2 is stretched, its long-chain molecules are straightened, thereby increasing its adhesion. This molecular structure allows the flexible skin-friendly layer 2 to adhere tightly to the skin surface, forming a protective film. The adhesiveness of the flexible skin-friendly layer 2 originates from electrostatic forces. When the flexible skin-friendly layer 2 unfolds, electrons on its surface separate between adjacent layers, resulting in one side carrying a positive charge and the other a negative charge. Since the flexible skin-friendly layer 2 itself is a good insulator, the static electricity is maintained for a long time. These surfaces with opposite charges attract each other, thus producing an adhesive effect. Utilizing these characteristics, during the fixation of the central venous catheter 12, the flexible skin-friendly layer 2 can be appropriately stretched to provide a certain degree of protection.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations.

Claims

1. A central venous catheter fixation device, characterized in that, include: A flexible adhesive layer for adhesion to a patient's skin; A flexible skin-friendly layer is disposed at the center of the flexible adhesive layer for adhering to the patient's skin. A rotating mechanism includes a fixed cylinder and a rotating cylinder. The fixed cylinder passes through a flexible adhesive layer and a flexible skin-friendly layer in sequence and is fixedly connected to the flexible skin-friendly layer. The rotating cylinder is coaxially rotatably disposed inside the fixed cylinder, and a central venous catheter can pass through the rotating cylinder.

2. The central venous catheter fixation device according to claim 1, characterized in that, One end of the rotating cylinder is equipped with an elastic clip for clamping the central venous catheter.

3. A central venous catheter fixation device according to claim 1, characterized in that, An annular groove is provided on the inner wall of the fixed cylinder in the circumferential direction. A sliding ring is provided in the annular groove and can slide freely along the circumferential direction of the annular groove. The sliding ring is connected to the rotating cylinder.

4. A central venous catheter fixation device according to claim 1, characterized in that, An elastic compression frame is provided on the side of the flexible adhesive layer away from the flexible skin-friendly layer, and elastic restraint straps are provided at both ends of the elastic compression frame.

5. A central venous catheter fixation device according to claim 4, characterized in that, The elastic clamping frame has a slot for securing a central venous catheter.

6. A central venous catheter fixation device according to claim 5, characterized in that, The slot includes a large slot and a small slot that are interconnected.

7. A central venous catheter fixation device according to claim 4, characterized in that, The elastic clamping frame is equipped with a transparent cover.

8. A central venous catheter fixation device according to claim 1, characterized in that, The flexible skin-friendly layer has a circular structure; the flexible adhesive layer and the flexible skin-friendly layer have overlapping corresponding through holes, and the fixing cylinder passes through the through holes in sequence.

9. A central venous catheter fixation device according to claim 1, characterized in that, The rotating cylinder includes an outer cylinder, an inner cylinder, and an annular gasket. The outer cylinder is coaxially rotatably disposed inside the fixed cylinder. One end of the inner cylinder is connected to the annular gasket, and the other end passes through the outer cylinder. The inner cylinder and the outer cylinder are threadedly connected. The center of the annular gasket is located on the axis of the inner cylinder, and the annular gasket can abut against the end face of the outer cylinder.

10. A central venous catheter fixation device according to claim 8, characterized in that, Overlapping separation openings are provided on the flexible adhesive layer and the flexible skin-friendly layer, and the separation openings are connected to the through holes.

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