Central venous catheter securement device

Abstract

The utility model relates to the field of medical auxiliary tools, concretely relates to a central venous catheter fixing device, including inner lining and shell. The inner lining is flexible material, and the inner lining includes sleeve and fixed part, the sleeve is tubular and is used for setting fixed central venous catheter, and the sleeve is circular arc shape. The deformation seam is set up on the sleeve wall, and the deformation seam penetrates the sleeve wall along the axis of sleeve. The fixed part is connected on the sleeve outer wall, and the fixed part bottom surface is used for adhering human skin. The shell is covered on the inner lining, and the shell is hard material, and the lower surface of shell is provided with the accommodating groove that is consistent with the sleeve, and the sleeve is embedded in the accommodating groove. Through the above technical scheme, the inner lining is used to constrain and guide the bending of central venous catheter, and then the shell is used to fix and protect the inner lining. The central venous catheter is prevented from being bent and folded due to improper bending on the patient's body surface.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary tools, specifically to a central venous catheter fixator. Background Technology

[0002] A central venous catheter (hereinafter referred to as "catheter") is a thin and flexible medical tubing that is inserted into a large vein (such as the internal jugular vein, subclavian vein, or femoral vein) through aseptic technique via skin puncture. It is widely used in clinical settings such as intensive care, surgery, chemotherapy, large-volume intravenous infusions, and routine blood collection. Proper catheter fixation is a crucial step in ensuring its safety and effectiveness, and it is essential to prevent accidental displacement, dislodgement, or related complications.

[0003] In clinical practice, catheters are typically secured using two methods: skin suture fixation and adhesive fixation. Skin suture fixation involves suturing near the catheter puncture site to firmly secure the catheter entry point to the skin surface; while the exposed portion of the catheter is secured using adhesive, employing medical tape or adhesive film to fix it to the patient's skin to ensure catheter stability.

[0004] However, due to the complexity of human anatomy and the needs of patients' daily activities, the exposed portion of the catheter inevitably needs to bend during use. This bending can easily lead to localized kinking at the attachment and fixation site, resulting in problems such as slower infusion rates, catheter wall adhesion, or even damage. These problems may not only affect treatment outcomes but also increase the risk of infection or require frequent catheter replacements, thereby increasing medical costs and patient suffering.

[0005] Therefore, there is an urgent need for a new type of catheter fixation device that can effectively fix the exposed part of the central venous catheter while allowing the catheter to bend naturally, avoiding the aforementioned problems caused by bending, thereby improving the safety and reliability of catheter use. Utility Model Content

[0006] To address the aforementioned shortcomings or defects in existing technologies, this invention provides a central venous catheter fixator that allows the central venous catheter to bend under restraint. Through the cooperation of multiple fixators, catheter bending is prevented.

[0007] Central venous catheter fixation devices, including:

[0008] The inner liner is made of a flexible material and includes a sleeve and a fixing part. The sleeve is tubular and used to fix the central venous catheter. The sleeve is arc-shaped. An expansion joint is formed on the wall of the sleeve, and the expansion joint penetrates the wall of the sleeve along the axis of the sleeve. The fixing part is connected to the outer wall of the sleeve, and the bottom surface of the fixing part is used to conform to human skin.

[0009] The outer shell covers the inner liner. The outer shell is made of a rigid material. The lower surface of the outer shell is provided with a receiving groove that fits into the sleeve. The sleeve is embedded in the receiving groove.

[0010] In some embodiments, the fixing part is butterfly-shaped and includes two fixing wings, the lower surface of the fixing wings is provided with an adhesive layer, the lower surface of the fixing wings is used to adhere to human skin, and the upper surface of the fixing wings adheres to the outer shell.

[0011] In some embodiments, the fixed wing is integrated with the sleeve.

[0012] In some implementations, the plane containing the sleeve axis is parallel to the extension direction of the fixed wing.

[0013] In some embodiments, the fixed wing is connected to the lower edge of the sleeve.

[0014] In some embodiments, the expansion joint is formed along the lower edge of the sleeve, and the expansion joint is located between the two fixed wings and the connection points of the sleeve.

[0015] In some embodiments, the sleeve bending angle is π / 2 to π / 3.

[0016] In some embodiments, the liner is made of silicone or rubber.

[0017] In some embodiments, the outer casing is made of plastic.

[0018] In some embodiments, the sleeve is provided with flanges at both ends, which are engaged at the edge of the outer shell to prevent the liner from sliding along the receiving groove.

[0019] In some embodiments, the fixed wing is provided with a fixing hole, and the outer shell is provided with a positioning hole corresponding to the fixing hole.

[0020] If the exposed portion of a central venous catheter is bent without restraint, it is prone to kinking at certain points. Mild kinking can reduce the infusion rate, and severe kinking can lead to adhesion of the catheter wall, resulting in blood flow obstruction or catheter damage.

[0021] The central venous catheter fixator of this invention has the following beneficial effects:

[0022] Preventing catheter bending: This invention uses a flexible inner liner to constrain the catheter, assisting its natural bending and preventing infusion obstruction or catheter damage due to excessive bending. The flexible design of the inner liner can adapt to the physiological bending requirements of the catheter while providing sufficient support to ensure a smooth infusion channel during use.

[0023] Stable fixation structure: A rigid outer shell secures the inner liner, preventing excessive deformation due to external pressure or patient movement, ensuring the stability and functionality of the fixator. The rigid design of the outer shell not only enhances the overall strength of the fixator but also effectively resists external impacts or pulling, reducing the risk of catheter displacement.

[0024] Easy installation and removal: An expansion joint is provided on the cannula, allowing it to unfold and facilitating the installation and removal of the liner. This simple operation does not damage the catheter. This design enables medical staff to quickly install and replace the fixator, reducing operation time and improving work efficiency.

[0025] Multi-angle bending support: Through the combined use of multiple fixators, the catheter can bend naturally at multiple angles to meet diverse clinical needs. This multi-angle bending capability is particularly suitable for patients who require frequent position adjustments, ensuring that the catheter maintains a stable and smooth infusion state in various postures.

[0026] Optimized cannula curvature: The receiving groove on the rigid outer shell matches the curvature of the cannula, ensuring that the cannula maintains a natural curved state after insertion, avoiding abnormal deformation or excessive bending. The receiving groove design not only improves the fixation accuracy of the cannula, but also effectively reduces local stress concentration caused by external pressure on the central venous catheter, extending the service life of the central venous catheter.

[0027] Enhanced fixation reliability: Medical tape is used to adhere the outer shell to the skin surface, which, combined with the outer shell's fixation of the inner liner, further improves the stability and reliability of the cannula's fixation of the central venous catheter. This dual fixation mechanism effectively prevents the cannula from loosening or falling off, reducing the risk of medical accidents caused by poor fixation.

[0028] Improving patient comfort: The synergistic effect of the flexible inner liner and rigid outer shell of the fixator not only ensures the stability of the central venous catheter but also reduces pressure on the patient's skin, improving the patient's wearing comfort, which is especially suitable for patients who require long-term central venous catheter treatment.

[0029] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0030] Figure 1 This is a perspective view of a central venous catheter fixator in its assembled state according to this utility model;

[0031] Figure 2 yes Figure 1 A bottom view;

[0032] Figure 3 This is a perspective view of a central venous catheter fixator of this utility model in an explosive state;

[0033] Figure 4 yes Figure 3 A bottom view.

[0034] Explanation of reference numerals in the attached figures

[0035] 1-Inner liner, 1a-Sleeve, 1b-Fixing part, 1b1-Fixing wing, 1b2-Fixing hole, 1c-Expansion joint, 1d-Flange;

[0036] 2-Outer shell, 2a-Receiving groove, 2b-Positioning hole. Detailed Implementation

[0037] The specific embodiments of this utility model are described in detail below. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0038] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0039] This invention provides a central venous catheter fixator, the structure of which is as follows:

[0040] The inner liner 1 is made of a flexible material and includes a cannula 1a and a fixing part 1b. The cannula 1a has an arc-shaped tubular structure for fitting and fixing the central venous catheter; its wall has a deformation slit 1c that penetrates the wall along the axis of the cannula 1a. The fixing part 1b is connected to the outer wall of the cannula 1a, and its bottom surface is designed to fit against human skin.

[0041] The outer shell 2 is made of rigid material and covers the outside of the inner liner 1. The lower surface of the outer shell 2 is provided with a receiving groove 2a that fits into the sleeve 1a. The sleeve 1a is embedded in the receiving groove 2a to ensure the stability and functionality of the inner liner 1.

[0042] The cannula 1a of the inner liner 1 is used to restrain and guide the bending of the central venous catheter, preventing it from bending excessively; the fixing part 1b is used to firmly fix the inner liner 1 to the human skin. The outer shell 2 not only protects the inner liner 1 from external forces, but also restrains the cannula 1a through the receiving groove 2a to ensure the stability of the curvature of the cannula 1a.

[0043] To facilitate the installation and removal of the cannula 1a, it is provided with a deformation joint 1c. By unfolding the deformation joint 1c, the cannula 1a can be fitted onto the central venous catheter, and the elasticity of the cannula 1a ensures that it fits the central venous catheter tightly.

[0044] The fixing part 1b is butterfly-shaped and includes two fixing wings 1b1 on the left and right. The lower surface of the fixing wing 1b1 is provided with an adhesive layer for adhering to the skin; the upper surface is adhered to the outer shell 2. The adhesive layer is covered with a plastic protective film, which can be peeled off to complete the fixing during use.

[0045] Medical tape can also be adhered to the upper surface of the fixed wing 1b1 to further enhance the fixation effect. Figure 1 In the embodiment shown, the upper surface of the fixed wing 1b1 is also provided with an adhesive layer to ensure a tight connection with the outer shell 2.

[0046] The fixed wing 1b1 and the sleeve 1a are integrally formed, and the entire inner liner 1 adopts an integral forming process to ensure the stability and reliability of the structure.

[0047] The plane containing the axis of cannula 1a is parallel to the extension direction of the fixed wing 1b1. When the fixed wing 1b1 is in contact with the body surface, the central venous catheter is parallel to the skin surface, reducing the risk of movement.

[0048] The fixed wing 1b1 is connected to the lower edge of the cannula 1a. When the central venous catheter is inserted into the cannula 1a, its lower edge is flush with or slightly higher than the lower edge of the fixed wing 1b1 by 1mm-2mm to ensure that the central venous catheter is close to the skin and to avoid movement.

[0049] like Figure 3 and Figure 4 As shown, the expansion joint 1c is formed along the lower edge of the cannula 1a, located between the two fixing wings 1b1 and the connection point of the cannula 1a. By pinching the fixing wings 1b1 and pulling them outward, the cannula 1a can be easily unfolded, facilitating installation and removal. After fixing, the expansion joint 1c is located between the fixing wings 1b1, preventing the expansion joint of the central venous cannula 1a from detaching.

[0050] The bending angle of the cannula 1a is controlled between π / 2 and π / 3 to ensure that the central venous catheter maintains a smooth infusion channel in its natural bending state. The inner liner 1 is made of silicone or rubber, and the outer shell 2 is made of plastic, combining flexibility and rigidity to meet different functional requirements.

[0051] The sleeve 1a has flanges 1d at both ends, which are embedded in the edge of the outer shell 2 to prevent the inner liner 1 from sliding along the receiving groove 2a. The fixing wing 1b1 has fixing holes 1b2, and the outer shell 2 has corresponding positioning holes 2b to facilitate precise positioning and fixing.

[0052] This utility model of a central venous catheter fixator effectively solves the bending problem in central venous catheter fixation through its unique structural design, improves the safety and reliability of infusion, and reduces patient discomfort and infection risk, thus having significant clinical application value.

[0053] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0054] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0055] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A central venous catheter fixator, characterized in that, include: The inner liner (1) is made of a flexible material and includes a sleeve (1a) and a fixing part (1b). The sleeve (1a) is tubular and used to install and fix a central venous catheter. The sleeve (1a) is arc-shaped. A deformation slit (1c) is opened on the wall of the sleeve (1a). The deformation slit (1c) penetrates the wall of the sleeve (1a) along the axis of the sleeve (1a). The fixing part (1b) is connected to the outer wall of the sleeve (1a). The bottom surface of the fixing part (1b) is used to fit the human skin. The outer shell (2) is covered on the inner liner (1). The outer shell (2) is made of rigid material. The lower surface of the outer shell (2) is provided with a receiving groove (2a) that fits with the sleeve (1a). The sleeve (1a) is embedded in the receiving groove (2a).

2. The central venous catheter fixator according to claim 1, characterized in that, The fixing part (1b) is butterfly-shaped and includes two fixing wings (1b1) on the left and right. An adhesive layer is provided on the lower surface of the fixing wing (1b1). The lower surface of the fixing wing (1b1) is used to adhere to human skin, and the upper surface of the fixing wing (1b1) adheres to the outer shell (2).

3. The central venous catheter fixator according to claim 2, characterized in that, The fixed wing (1b1) is integrated with the sleeve (1a).

4. The central venous catheter fixator according to claim 2, characterized in that, The plane containing the axis of the sleeve (1a) is parallel to the extension direction of the fixed wing (1b1).

5. The central venous catheter fixator according to claim 4, characterized in that, The fixed wing (1b1) is connected to the lower edge of the sleeve (1a).

6. The central venous catheter fixator according to claim 5, characterized in that, The expansion joint (1c) is opened along the lower edge of the sleeve (1a) and is located between the connection positions of the two fixed wings (1b1) and the sleeve (1a).

7. The central venous catheter fixator according to claim 1, characterized in that, The bending angle of the sleeve (1a) is π / 2 to π / 3.

8. The central venous catheter fixator according to claim 1, characterized in that, The inner liner (1) is made of silicone or rubber, and the outer shell (2) is made of plastic.

9. The central venous catheter fixator according to claim 2, characterized in that, The sleeve (1a) is provided with flanges (1d) at both ends, and the flanges (1d) are engaged at the edge of the outer shell (2) to prevent the inner liner (1) from sliding along the receiving groove (2a).

10. The central venous catheter fixator according to claim 2, characterized in that, The fixed wing (1b1) is provided with a fixing hole (1b2), and the outer shell (2) is provided with a positioning hole (2b) corresponding to the fixing hole (1b2).

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