A catheter securement device

Abstract

The utility model relates to a kind of catheter fixer, including the base that can be worn in the oral cavity of patient, gap corresponding to the oral cavity position of patient is opened in base, positioning groove is equipped in base, gap is communicated with positioning groove;The side of base away from positioning groove integrally formed has locating seat, threaded hole is set through on locating seat, threaded hole is threadedly cooperated with the threaded rod that is set, one end of threaded rod is fixedly connected with rotating handle, the other end of threaded rod is detachably rotatably connected with clamping block, clamping block is used for fixing catheter with positioning groove cooperation;The side of clamping block away from gap is equipped with guiding device, guiding groove that is adapted with guiding device is opened in base, guiding device is embedded in guiding groove and can slide left and right along guiding groove;The detachable design of clamping block and base, comply with hospital infection prevention and control specification, medical staff can separately deep cleaning and disinfection to contaminated clamping block, reduce cross-infection risk.

Description

Technical Field

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

[0002] Endotracheal intubation and laryngeal mask airway tubes are commonly used airway management tools in clinical general anesthesia, intensive care, and emergency resuscitation. Their stability is directly related to the patient's ventilation safety. However, in actual clinical practice, due to factors such as patient agitation, changes in body position, or nursing procedures, endotracheal tubes or laryngeal mask airway tubes are prone to displacement or even dislodgement, leading to ventilation interruption, which may threaten the patient's life in severe cases.

[0003] Currently, there are two main methods used in clinical practice to fix endotracheal tubes and laryngeal mask airway tubes: one is to use adhesive tape for fixation. This method is simple to operate but has problems such as unstable fixation, susceptibility to sweat or oral secretions, difficulty in adjusting tightness at any time, and easy skin irritation when changing the tube; the other is to use special fixation devices. Existing fixation devices often have the defects of complex structure, numerous parts, and inconvenient assembly and disassembly. Some devices can only be used with a single type of tube, resulting in poor versatility. Furthermore, it is difficult to flexibly adjust the clamping posture according to the tube angle during fixation, which can easily lead to uneven local force on the tube, affecting the tube's lifespan or increasing patient discomfort.

[0004] Prior art document CN201680038476.1 discloses an airway tube retainer, which secures the tube through a panel, thumb screw, connecting arm, and clamp. The thumb screw has both rotational and linear degrees of freedom, allowing for coarse and fine adjustments. However, this airway tube retainer still has the following shortcomings: First, the connection structure between the clamp and the thumb screw is complex, making assembly difficult, and the angle adjustment of the clamp depends on the sliding of the connecting arm, resulting in insufficient flexibility; second, it lacks a convenient detachable cleaning structure, making it prone to bacterial growth after long-term use and increasing the risk of cross-infection.

[0005] Therefore, improvements are needed to address the aforementioned technical issues. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing catheter fixation devices, such as complex structure, unstable fixation, and inconvenient cleaning and maintenance, and to provide a catheter fixator that is ingeniously designed, simple in structure, easy to adjust, safe, stable and highly versatile.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a catheter fixator includes a base that can be worn on the patient's mouth, a notch corresponding to the position of the patient's oral cavity is provided on the base, a positioning groove is provided inside the base, and the notch is connected to the positioning groove; a positioning seat is integrally formed on the side of the base away from the positioning groove, a threaded hole is provided through the positioning seat, a threaded rod is threaded through the threaded hole, a rotating handle is fixedly connected to one end of the threaded rod, and a clamping block is detachably rotatably connected to the other end of the threaded rod, the clamping block cooperates with the positioning groove to fix the catheter; a guide device is provided on the side of the clamping block away from the notch, a guide groove adapted to the guide device is provided on the base, the guide device is embedded in the guide groove and can slide left and right along the guide groove.

[0008] As a preferred technical solution of this utility model, both ends of the base are provided with strap connection holes, and a strap is inserted into the strap connection holes. The strap is detachably connected by Velcro so as to fix the base to the patient's neck.

[0009] As a preferred technical solution of this utility model, the guiding device includes a connecting block and a limiting block. The connecting block is vertically connected to the middle of the limiting block and the clamping block, and the connecting surfaces of the connecting block, the limiting block and the clamping block are treated with arc transition to reduce stress concentration and improve structural strength.

[0010] As a preferred technical solution of this utility model, the bottom of the limiting block is fixedly connected to a guide block, and a disassembly groove is provided on the base. The disassembly groove is connected to the guide groove, and the width of the disassembly groove is the same as the width of the guide block. When the clamping block rotates in the guide groove, the guide block can move out along the disassembly groove to separate the clamping block from the base, which facilitates the individual cleaning and disinfection of the clamping block and reduces the risk of cross-infection. The rotation angle can be 90° or 270°, as long as the guide block can be moved out of the disassembly groove.

[0011] As a preferred technical solution of this utility model, the connecting block 90, the limiting block 91, and the guide block 92 are fixedly connected and integrally formed; moreover, the connecting block, the limiting block, the guide block, and the clamping block are integrally injection molded from medical-grade plastic, and the surface is polished after molding, which not only ensures the overall strength and stability of the structure, but also avoids bacterial growth and skin irritation caused by surface roughness.

[0012] As a preferred technical solution of this utility model, the clamping block has a clamping arc surface on the side facing the positioning groove. The curvature of the clamping arc surface is adapted to the curvature of the outer wall of the catheter. The clamping block and the positioning groove cooperate to form a fixator slot for clamping the catheter. The inner wall of the positioning groove is provided with an anti-slip layer made of medical silicone. The thickness of the anti-slip layer is 0.3-0.5mm, which can enhance the friction between the anti-slip layer and the catheter, improve the fixation stability, and avoid damage to the outer wall of the catheter.

[0013] As a preferred technical solution of this utility model, multiple clamping strips are integrally formed on the clamping arc surface. The multiple clamping strips have a spike structure and are equidistantly distributed along the length direction of the clamping arc surface. The spacing between adjacent clamping strips is 1-2mm. The top of the spike is arc-shaped with a radius of 0.1-0.2mm. This further enhances the friction while preventing the spike from scratching the catheter or the patient's skin.

[0014] As a preferred technical solution of this utility model, the base has an extension plate integrally formed on the side near the positioning groove. An extension groove is formed in the extension plate. The extension groove and the positioning groove are in the same vertical plane, and the height of the positioning groove is 1 / 3 of the height of the extension plate. The depth of the extension groove is the same as the depth of the positioning groove. The extension plate and the extension groove can provide auxiliary support for the conduit, avoid problems such as blockage or damage to the conduit due to suspension or excessive bending, and at the same time adapt to conduits of different lengths and directions, improving the versatility of the device.

[0015] As a preferred embodiment of this invention, a spherical guide is integrally formed at the end of the threaded rod near the clamping block, and an annular limiting groove is provided at the connection between the spherical guide and the threaded rod. A through hole is provided through the clamping block, and a stepped limiting seat is provided on the inner wall of the through hole. The spherical guide is inserted into and fitted into the through hole, and the limiting seat is engaged in the limiting groove. The limiting groove can rotate 360° around the limiting seat. This structure allows the clamping block to flexibly adjust its posture according to the actual angle of the conduit, ensuring that the clamping arc surface is always in close contact with the outer wall of the conduit, and avoiding the problem of unstable fixation caused by angle deviation.

[0016] As a preferred embodiment of this utility model, the end of the spherical guide is provided with a guide slope, and the angle between the guide slope and the axis of the spherical guide is 30°-45°; a guide groove is provided in the insertion direction of the spherical guide, the guide groove extends to the limiting groove, and the width of the guide groove gradually increases from the end of the spherical guide towards the limiting groove; the design of the guide slope and the guide groove facilitates the quick and accurate insertion of the spherical guide into the through hole, thereby improving assembly efficiency.

[0017] The beneficial effects of this utility model are: 1. This utility model provides stable and reliable fixation: Through the anti-slip layer on the inner wall of the positioning groove, the clamping arc surface of the clamping block, and the clamping strip with the spike structure, a multi-dimensional anti-slip fixation system is formed, which greatly enhances the friction with the catheter; at the same time, the clamping block can rotate flexibly around the threaded rod, which can adapt to the catheter angle and ensure that the clamping surface fits tightly, effectively preventing the catheter from shifting or falling out, and ensuring the patient's ventilation safety.

[0018] 2. This utility model is convenient and efficient to operate: the design of the rotating handle, combined with the threaded transmission mechanism, simplifies the catheter fixation operation to a single-handed rotation action, which medical staff can master without professional training; the strap uses Velcro connection, which can quickly adjust the tightness to fit patients with different neck sizes; the detachable structure of the clamping block can be separated by simply rotating, which is convenient for cleaning and maintenance and significantly improves the work efficiency of medical staff.

[0019] 3. This utility model is easy to clean and maintain: The detachable design of the clamping block and the base complies with hospital infection control standards. Medical staff can perform deep cleaning and disinfection of the contaminated clamping block separately, reducing the risk of cross-infection. In addition, the device adopts a modular design. When a certain part is damaged, there is no need to replace the whole device. Only the corresponding part needs to be replaced, which reduces medical costs.

[0020] 4. This utility model is comfortable and safe to wear: the notch design of the base avoids covering the key areas of the patient's mouth, ensuring the patient's normal mouth opening and swallowing function; the strap is made of soft medical material, and with the precise tightness adjustment of Velcro, it reduces pressure and friction on the patient's neck skin; the surfaces of each component of the device are polished and have no sharp edges, further improving wearing comfort and safety.

[0021] 5. This utility model has strong versatility: the extension plate and extension groove can provide auxiliary support and fixation for catheters of different lengths and directions, and are compatible with various types of catheters such as endotracheal tubes and laryngeal mask airway tubes, meeting the needs of different clinical use scenarios and having a wide range of applications. Attached Figure Description

[0022] Figure 1 This is a top view of the catheter fixator according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the catheter fixator structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the threaded rod and the rotating handle in an embodiment of this utility model; Figure 4 This is a schematic diagram showing the connection between the threaded rod, the rotating handle, and the clamping block in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the clamping block in an embodiment of this utility model (I); Figure 6 This is a schematic diagram (II) of the structure of the clamping block in an embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the base of an embodiment of this utility model; Figure 8 This is a diagram illustrating the usage of the catheter fixator in this utility model embodiment for holding the laryngeal mask airway tube. Figure 9This is a diagram illustrating the usage of the catheter fixator in this utility model embodiment for holding an endotracheal tube. The attached figures are labeled as follows: base 1, notch 2, positioning groove 3, positioning seat 4, threaded hole 5, threaded rod 6, clamping block 7, retainer slot 8, guide device 9, extension plate 10, extension groove 11, strap connection hole 12, strap 13, guide groove 14, disassembly groove 15, laryngeal mask airway tube 20, endotracheal tube 30, spherical guide 60, limiting groove 61, guide groove 62, guide slope 63, rotating handle 64, clamping arc surface 70, clamping strip 71, through hole 72, limiting seat 73, connecting block 90, limiting block 91, guide block 92. Detailed Implementation

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] Example: Figures 1-4 As shown, the catheter fixator includes a base 1 that can be worn in the patient's mouth. The base 1 is made of medical-grade ABS plastic, which has good toughness and biocompatibility. The base 1 has a notch 2 corresponding to the position of the patient's oral cavity. The notch 2 is U-shaped to ensure that the patient's normal mouth opening and swallowing are not affected. The base 1 has a positioning groove 3. The positioning groove 3 has a semi-circular cross-section to adapt to the outer diameter of common catheters. The notch 2 is connected to the positioning groove 3 to form the catheter entry channel.

[0025] A positioning seat 4 is integrally formed on the side of the base 1 away from the positioning groove 3. The positioning seat 4 has a rectangular cross-section and a threaded hole 5 is provided through the positioning seat 4. The inner diameter of the threaded hole 5 is adapted to the outer diameter of the threaded rod 6. The threaded rod 6 is threaded through the threaded hole 5. A rotating handle 64 is fixedly connected to one end of the threaded rod 6. The rotating handle 64 is circular in shape and has anti-slip texture on the surface with a texture depth of 0.2-0.3mm, which is convenient for medical staff to hold and operate. A clamping block 7 is detachably rotatably connected to the other end of the threaded rod 6. The clamping block 7 cooperates with the positioning groove 3 to fix the catheter.

[0026] A guide device 9 is provided on the side of the clamping block 7 away from the notch 2. The guide device 9 includes a connecting block 90 and a limiting block 91. The connecting block 90 is vertically connected to the middle of the limiting block 91 and the clamping block 7, and the connecting surfaces of the connecting block 90, the limiting block 91 and the clamping block 7 are treated with arc transition. A guide groove 14 adapted to the guide device 9 is provided on the base 1. The cross-section of the guide groove 14 is rectangular and the width is the same as the width of the limiting block 91. The guide device 9 is embedded in the guide groove 14 and can slide left and right along the guide groove 14 to ensure that the clamping block 7 moves smoothly and avoids deviation.

[0027] The core component of this utility model's catheter fixator is the base 1, whose unique design fully considers ergonomics and clinical practicality. The base 1 can be fitted to the patient's mouth, and the notch 2 corresponding to the oral cavity position ensures that the patient can open their mouth and swallow normally while wearing the fixator, while avoiding pressure on the lips, gums, and other areas due to the base completely covering the oral cavity area, thus reducing patient discomfort and the risk of skin damage. The design of the notch 2 connecting with the internal positioning groove 3 of the base 1 provides a smooth entry path for the catheter, allowing medical staff to easily introduce the catheter from the oral cavity and accurately place it in the positioning groove 3, laying the foundation for subsequent fixation operations. The inner surface of the positioning groove 3 adopts an anti-slip texture design, and the depth and density of the texture have been precisely calculated to further enhance the friction between the catheter and the catheter without damaging the outer wall of the catheter. Meanwhile, an elastic buffer layer is also provided at the bottom of the positioning groove 3. This buffer layer is made of medical-grade silicone material, which is soft and elastic. It can effectively buffer the impact force on the catheter when the patient moves, and prevent the catheter from bending or breaking due to uneven force. It works in conjunction with the clamping block 7 to provide a more stable and safe fixation environment for the catheter.

[0028] When the catheter is placed in the positioning groove 3, the clamping block 7 can be moved by rotating the threaded rod 6 through the rotating handle 7. The clamping block 7 and the positioning groove 3 are used to secure the catheter; wherein, the catheter is a laryngeal mask airway duct 20 or an endotracheal tube 30; see reference. Figure 8 and Figure 9 As shown.

[0029] The combination of the positioning seat 4 and the threaded rod 6 constitutes the driving structure for fixing the catheter. The positioning seat 4 is located on the side of the base 1 away from the positioning groove 3, and the threaded hole 5 on it is tightly fitted with the threaded rod 6 to form a threaded transmission mechanism. The rotating handle 64 at one end of the threaded rod 6 adopts a shape design that conforms to the curvature of the human hand and is provided with anti-slip texture. When operating, medical staff only need to hold the rotating handle 64 with one hand and rotate it clockwise or counterclockwise to easily drive the threaded rod 6 to make linear movement in the threaded hole 5.

[0030] The rotating connection between the other end of the threaded rod 6 and the clamping block 7 is a major innovation of this invention. The ingenious combination of the spherical guide 60, the limiting groove 61, the through hole 72 on the clamping block 7, and the limiting seat 73 allows the clamping block 7 to move linearly under the drive of the threaded rod 6, and also to rotate freely around the limiting groove 61 with the limiting seat 73 as a fulcrum. This feature is significant in practical use. When the insertion angle of the conduit is irregular, the clamping block 7 can automatically adjust the angle to ensure that its clamping arc surface 70 is always tightly fitted with the outer wall of the conduit, avoiding problems of insecure fixation due to angle deviation.

[0031] The clamping block 7 has a clamping arc surface 70 that conforms to the shape of the catheter's outer wall. The clamping block 7 and the positioning groove 3 form a retainer slot 8 for clamping the catheter. The clamping block 7 and the positioning groove 3 are key actuators for catheter fixation. The clamping arc surface 70 of the clamping block 7 is precisely designed based on the outer wall contour of common catheters, adopting an arc-shaped curved surface that closely matches the shape of the catheter's outer wall. When the clamping block 7 approaches the positioning groove 3 under the action of the threaded rod 6, the retainer slot 8 formed by the two can clamp the catheter from both sides. To further enhance the fixation effect, multiple clamping strips 71 are integrally formed on the clamping arc surface 70. The multiple clamping strips 71 have a spike structure and are equidistantly distributed along the length of the clamping arc surface 70. The distance between adjacent clamping strips 71 is 1.5 mm, the height of the spike is 0.3 mm, and the top is arc-shaped with a radius of 0.15 mm. This enhances friction while preventing scratches on the catheter and the patient's skin.

[0032] like Figures 5-6 As shown, the bottom of the limiting block 91 is fixedly connected to the guide block 92 by glue. The guide block 92 has a square cross-section. The base 1 has a disassembly groove 15 with a rectangular cross-section. The width of the disassembly groove 15 is the same as the width of the guide block 92, and the depth is the same as the depth of the guide groove 14. The disassembly groove 15 is connected to the guide groove 14. When the clamping block 7 rotates 90° in the guide groove 14, the guide block 92 is aligned with the disassembly groove 15. At this time, the guide block 92 can be moved out along the disassembly groove 15 to separate the clamping block 7 from the base 1, which is convenient for cleaning and disinfection.

[0033] The connecting block 90, limiting block 91, guide block 92, and clamping block 7 are integrally injection molded from medical-grade polypropylene. After molding, the surface is polished to ensure structural strength and prevent bacterial growth. The clamping block 7 has a clamping arc surface 70 on the side facing the positioning groove 3. The curvature of the clamping arc surface 70 is adapted to the curvature of the outer wall of the catheter. The clamping block 7 and the positioning groove 3 cooperate to form a retainer slot 8 for clamping the catheter. The inner wall of the positioning groove 3 is provided with an anti-slip layer made of medical silicone. The thickness of the anti-slip layer is 0.4mm, and the surface of the anti-slip layer is provided with diamond-shaped patterns with a pattern spacing of 0.5mm to enhance the friction with the catheter.

[0034] In daily use, if the clamping block 7 becomes contaminated with oral secretions, blood, or other pollutants, medical staff can simply rotate the clamping block 7 90° within the guide groove 14, aligning the guide block 92 with the disassembly groove 15. This allows the guide block 92 to be easily removed along the disassembly groove 15, separating the clamping block 7 from the base 1. Subsequently, the clamping block 7 can be individually deep-cleaned and disinfected. This design not only meets hospital infection control requirements but also extends the overall lifespan of the fixator.

[0035] like Figure 7As shown, an extension plate 10 is integrally formed on the side of the base 1 near the positioning groove 3. An extension groove 11 is provided in the extension plate 10. The cross-section of the extension groove 11 is semi-circular, and the diameter is the same as the diameter of the positioning groove 3. The extension groove 11 and the positioning groove 3 are in the same vertical plane, and the height of the positioning groove 3 is 1 / 3 of the height of the extension plate 10, so as to ensure the auxiliary support effect of the conduit and avoid excessive bending of the conduit.

[0036] A spherical guide body 60 is integrally formed at the end of the threaded rod 6 near the clamping block 7. The diameter of the spherical guide body 60 is 1-1.2cm. An annular limiting groove 61 is provided at the connection between the spherical guide body 60 and the threaded rod 6. A through hole 72 is provided through the clamping block 7. The inner diameter of the through hole 72 is adapted to the diameter of the spherical guide body 60. A stepped limiting seat 73 is provided on the inner wall of the through hole 72. The thickness of the limiting seat 73 is 0.3-0.4cm. The spherical guide body 60 passes through and fits into the through hole 72. The limiting seat 73 is engaged in the limiting groove 61. The limiting groove 61 can rotate 360° around the limiting seat 73 to realize the adaptive adjustment of the angle of the clamping block 7.

[0037] The end of the spherical guide 60 is provided with a guide slope 63, and the angle between the guide slope 63 and the axis of the spherical guide 60 is 40°. The insertion direction of the spherical guide 60 is provided with a guide groove 62, and the width of the guide groove 62 gradually increases from the end of the spherical guide 60 towards the limiting groove 61. The guide groove 62 extends to the limiting groove 61, which facilitates the quick insertion of the spherical guide 60 into the through hole 72 and improves assembly efficiency.

[0038] Both ends of the base 1 are provided with strap connection holes 12, and a strap 13 is inserted into the strap connection holes 12. The strap 13 is made of medical elastic cloth. One end of the strap 13 is provided with a hook side and the other end is provided with a loop side. The strap 13 is detachable and easy to adjust the tightness by using the hook and loop to fix the base 1 to the patient's neck.

[0039] In this embodiment, the catheter fixator is used as follows: 1. Assemble the guide device and the base: Align the guide block 92 in the guide device 9 with the disassembly groove 15 on the base 1, insert the guide device 9 into the guide groove 14, and then rotate the clamping block 7 by 90° to make the guide block 92 and the disassembly groove 15 misaligned. At this time, the guide device 9 can slide normally in the guide groove 14, thus completing the initial assembly of the guide device 9 and the base 1. 2. Connecting the threaded rod and the clamping block: Pass the threaded rod 6 through the threaded hole 5 on the positioning seat 4, align the spherical guide 60 at one end of the threaded rod 6 with the through hole 72 on the clamping block 7, and slowly insert the spherical guide 60 into the through hole 72 using the guide slope 63 and guide groove 62 at the end of the spherical guide 60 until the limiting seat 73 is engaged in the limiting groove 61, ensuring that the spherical guide 60 can rotate flexibly around the limiting seat 73, thus completing the connection between the threaded rod 6 and the clamping block 7; 3. Install the strap: Pass both ends of the strap 13 through the strap connection holes 12 at both ends of the base 1, adjust the length of the strap 13 so that the strap 13 can wrap around the patient's neck, and the hook and loop sides of the Velcro can be effectively adhered to complete the overall assembly of the catheter fixation device.

[0040] In this embodiment, the catheter fixator is used as follows: 1. Wearing the base: Place the base 1 on the patient's mouth, so that the notch 2 corresponds to the position of the patient's mouth. Wrap the strap 13 around the patient's neck and adjust the tightness of the strap 13 with Velcro to ensure that the base 1 is firmly fixed to the patient's neck and that the patient does not feel any pressure. 2. Placement of the catheter: According to clinical needs, insert the endotracheal tube 30 or the laryngeal mask airway tube 20 into the patient's mouth and place it in the positioning groove 3 through the notch 2. If the catheter is long, a part of the catheter can be placed in the extension groove 11 and the extension plate 10 can be used to provide auxiliary support for the catheter. 2. Clamping and fixing the catheter: The medical staff holds the rotating handle 64 with one hand and rotates the threaded rod 6 clockwise. The threaded rod 6 moves towards the positioning groove 3 under the action of the threaded hole 5, which drives the clamping block 7 to move along the guide groove 14 towards the positioning groove 3 until the clamping arc surface 70 of the clamping block 7 is tightly fitted with the outer wall of the catheter, the clamping strip 71 is embedded in the surface of the catheter, and the catheter is clamped and fixed by the fixer slot 8. Then stop rotating the rotating handle 64. 3. Disassembly and cleaning: After use, rotate the handle 64 counterclockwise to move the clamping block 7 away from the positioning groove 3, release the guide tube, remove the guide tube, rotate the clamping block 7 90° in the guide groove 14 so that the guide block 92 is aligned with the disassembly groove 15, move the guide block 92 out along the disassembly groove 15, separate the clamping block 7 from the base 1, and clean and disinfect the clamping block 7, base 1, threaded rod 6 and other parts respectively. After disinfection, reassemble for the next use.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0042] Although this document frequently uses reference numerals from the accompanying drawings, such as: base 1, notch 2, positioning groove 3, positioning seat 4, threaded hole 5, threaded rod 6, clamping block 7, retainer slot 8, guide device 9, extension plate 10, extension groove 11, strap connection hole 12, strap 13, guide groove 14, disassembly groove 15, laryngeal mask airway tube 20, endotracheal tube 30, spherical guide 60, limiting groove 61, guide groove 62, guide slope 63, rotating handle 64, clamping arc surface 70, clamping strip 71, through hole 72, limiting seat 73, connecting block 90, limiting block 91, guide block 92, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A catheter fixator, characterized in that: The device includes a base (1) that can be worn on the patient's mouth. The base (1) has a notch (2) corresponding to the position of the patient's mouth. The base (1) has a positioning groove (3) inside. The notch (2) is connected to the positioning groove (3). A positioning seat (4) is formed on the side of the base (1) away from the positioning groove (3). A threaded hole (5) is provided through the positioning seat (4). A threaded rod (6) is threaded through the threaded hole (5). A rotating handle (64) is fixedly connected to one end of the threaded rod (6). A clamping block (7) is detachably and rotatably connected to the other end of the threaded rod (6). The clamping block (7) cooperates with the positioning groove (3) to fix the catheter. A guide device (9) is provided on the side of the clamping block (7) away from the notch (2). A guide groove (14) adapted to the guide device (9) is provided on the base (1). The guide device (9) is embedded in the guide groove (14) and can slide left and right along the guide groove (14).

2. The catheter fixator according to claim 1, characterized in that: The guiding device (9) includes a connecting block (90) and a limiting block (91). The connecting block (90) is vertically connected to the middle of the limiting block (91) and the clamping block (7), and the connecting surfaces of the connecting block (90), the limiting block (91) and the clamping block (7) are treated with arc transition.

3. A catheter fixator according to claim 2, characterized in that: The bottom of the limiting block (91) is fixedly connected to the guide block (92), and the base (1) is provided with a disassembly groove (15). The disassembly groove (15) is connected to the guide groove (14), and the width of the disassembly groove (15) is the same as the width of the guide block (92). When the clamping block (7) rotates in the guide groove (14), the guide block (92) can move out along the disassembly groove (15) to realize the separation of the clamping block (7) from the base (1).

4. A catheter fixator according to claim 3, characterized in that: The connecting block (90), limiting block (91), and guide block (92) are fixedly connected and integrally formed.

5. A catheter fixator according to claim 1, characterized in that: The clamping block (7) has a clamping arc surface (70) on the side facing the positioning groove (3). The curvature of the clamping arc surface (70) is adapted to the curvature of the outer wall of the conduit. The clamping block (7) and the positioning groove (3) cooperate to form a retainer slot (8) for clamping the conduit.

6. A catheter fixator according to claim 5, characterized in that: Multiple clamping strips (71) are integrally formed on the clamping arc surface (70). The multiple clamping strips (71) have a spike structure and are equidistantly distributed along the length direction of the clamping arc surface (70). The distance between adjacent clamping strips (71) is 1-2 mm. The top of the spike is arc-shaped with a radius of 0.1-0.2 mm.

7. A catheter fixator according to claim 1, characterized in that: The base (1) has an extension plate (10) integrally formed on the side near the positioning groove (3). An extension groove (11) is provided in the extension plate (10). The extension groove (11) and the positioning groove (3) are in the same vertical plane. The height of the positioning groove (3) is 1 / 3 of the height of the extension plate (10). The depth of the extension groove (11) is the same as the depth of the positioning groove (3).

8. A catheter fixator according to claim 1, characterized in that: The threaded rod (6) has a spherical guide (60) integrally formed at the end near the clamping block (7). An annular limiting groove (61) is provided at the connection between the spherical guide (60) and the threaded rod (6). A through hole (72) is provided through the clamping block (7). A stepped limiting seat (73) is provided on the inner wall of the through hole (72). The spherical guide (60) is inserted into and fitted into the through hole (72). The limiting seat (73) is engaged in the limiting groove (61), and the limiting groove (61) can rotate around the limiting seat (73).

9. A catheter fixator according to claim 8, characterized in that: The end of the spherical guide (60) is provided with a guide slope (63), and the angle between the guide slope (63) and the axis of the spherical guide (60) is 30°-45°; the insertion direction of the spherical guide (60) is provided with a guide groove (62), the guide groove (62) extends to the limiting groove (61), and the width of the guide groove (62) gradually increases from the end of the spherical guide (60) towards the limiting groove (61).

10. A catheter fixator according to claim 1, characterized in that: Both ends of the base (1) are provided with strap connection holes (12), and a strap (13) is inserted into the strap connection hole (12). The strap (13) is detachably connected by Velcro so as to fix the base (1) to the patient's neck.

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