Catheter retainer

Abstract

The present application relates to a catheter fixing device, comprising a base, the base is provided with a gap for the catheter to enter, and the base is provided with a positioning groove communicated with the gap; the side of the base away from the positioning groove is provided with a positioning assembly, one end of a threaded rod is provided with an operating part, the other end of the threaded rod is connected with a clamping block through an anti-dropping connection structure, the positioning assembly is assembled with an elastically deformable connecting mechanism, the connecting mechanism can be switched between a disengaged state and an engaged state; when in the disengaged state, the connecting mechanism has no contact with the threaded rod, and the threaded rod can drive the clamping block to move quickly along the channel; when in the engaged state, the connecting mechanism is screwed with the threaded rod, and rotating the operating part can drive the threaded rod to move to adjust the clamping force of the clamping block on the catheter; by setting the connecting mechanism which can be screwed with the threaded rod, the switching between the clamping state and the locking state is realized, the clamping block can be quickly moved to position the catheter in the clamping state, and the catheter is prevented from being displaced or deformed.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to catheter fixation devices. Background Technology

[0002] Endotracheal intubation, as a key medical device for establishing an artificial airway, plays an irreplaceable role in clinical emergency care and treatment. However, existing endotracheal intubation fixation devices have many technical shortcomings, making it difficult to meet the high clinical requirements for fixation stability, ease of operation, and safety.

[0003] 1. Tightness control challenge: For example, application number 202420486060.8 discloses a press-and-push endotracheal tube fixation device, which moves the clamp head through a long toothed plate. The clamping gap depends on the tooth spacing adjustment. For endotracheal tubes of different diameters, it is easy to have problems such as "too loose causing displacement" or "too tight causing tube deformation". It cannot accurately match the diverse clinical needs and may affect airway patency or damage the tube.

[0004] 2. Risk of clamping component detachment: Traditional fixation devices often adopt a split structure of "screw + detachable clamp". The clamp and the drive component are only connected by simple rotation. During patient agitation, nursing operations, etc., the clamp is easy to detach from the end of the drive component, which poses a risk of being swallowed by the patient and causing serious medical accidents such as suffocation. The safety is insufficient.

[0005] Therefore, improvements are needed to address the aforementioned technical issues. Summary of the Invention

[0006] The present invention aims to overcome the above-mentioned defects of difficult tightness control and easy detachment of clamping components. The present invention provides a catheter fixator that is anti-detachment, has precise force control, is easy to operate and has a long service life.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a catheter fixator, comprising a base, wherein the base has a notch for catheter entry, and a positioning groove communicating with the notch is provided inside the base; a positioning component is provided on the side of the base away from the positioning groove, the positioning component has a channel for a threaded rod to pass through, the channel including at least a guide hole on a positioning plate, one end of the threaded rod has an operating part, and the other end of the threaded rod is connected to a clamping block through an anti-detachment connection structure, the clamping block cooperating with the positioning groove to clamp the catheter; the positioning component is equipped with an elastically deformable connecting mechanism, the connecting mechanism... It can switch between disengaged and engaged states: In the disengaged state, the connecting mechanism and the threaded rod are not in contact, and the threaded rod can drive the clamping block to move quickly along the channel; in the engaged state, the connecting mechanism and the threaded rod are threadedly engaged, and rotating the operating part can drive the threaded rod to move to adjust the clamping force of the clamping block on the guide tube; the clamping block is provided with a guide device, and the base is provided with a guide structure adapted to the guide device. The guide device and the guide structure cooperate to limit the movement direction of the clamping block; the base is also provided with a disassembly and assembly structure communicating with the guide structure, through which the clamping block can be separated from the base.

[0008] In a preferred embodiment of the present invention, the positioning assembly includes at least two positioning plates arranged opposite each other, the positioning plates having guide holes for threaded rods to pass through, the guide holes forming at least a portion of the channel; the positioning assembly also includes two mounting plates connecting the two positioning plates, the two positioning plates and the two mounting plates forming a positioning cavity for accommodating the connecting mechanism.

[0009] In a preferred embodiment of the present invention, the connecting mechanism includes a pressing part, a supporting part, and a locking part. The supporting part connects the pressing part and the locking part, and the locking part is provided with a threaded section. When the pressing part is pressed, the supporting part undergoes elastic deformation, causing the threaded section to disengage from the threaded rod, thus forming the disengaged state. When the force applied to the pressing part is removed, the supporting part resets, causing the threaded section to engage with the threaded rod, thus forming the engaged state.

[0010] In a preferred embodiment of the present invention, the support portion includes support blocks symmetrically arranged on both sides of the pressing portion, and an inclined connecting plate is connected to one end of the support block away from the pressing portion. The locking portion includes a locking plate at the connection between the support block and the connecting plate, and the threaded section is located on the side of the locking plate near the threaded rod. A connecting groove for the threaded rod to pass through is formed between the two support blocks.

[0011] As a preferred embodiment of the present invention, the anti-detachment connection structure includes a protrusion structure at the end of the threaded rod and a limiting structure on the clamping block; the protrusion structure and the limiting structure cooperate to restrict the threaded rod and the clamping block from separating along the axial direction of the threaded rod, and the protrusion structure can rotate relative to the limiting structure.

[0012] In a preferred embodiment of the present invention, the protruding structure is a spherical guide body, and a limiting groove is formed between the spherical guide body and the threaded rod; the limiting structure is a stepped limiting seat disposed in the through hole of the clamping block; the spherical guide body passes through the through hole, and the limiting seat is engaged in the limiting groove.

[0013] In a preferred embodiment of the present invention, the end of the spherical guide is provided with a guide slope, and the outer wall of the spherical guide is provided with a guide groove, the guide groove extending to the limiting groove.

[0014] In a preferred embodiment of the present invention, the guiding device includes a connecting block, a limiting block, and a guiding block. The connecting block connects the clamping block and the limiting block, and the guiding block is located at one end of the limiting block. The guiding structure is a guiding groove on the base, and the limiting block is embedded in the guiding groove and can slide along it.

[0015] In a preferred embodiment of the present invention, the disassembly and assembly structure is a disassembly and assembly groove communicating with the guide groove, and the width of the disassembly and assembly groove is adapted to the width of the guide block; after rotating the clamping block to align the guide block with the disassembly and assembly groove, the guide block can be moved out along the disassembly and assembly groove.

[0016] In a preferred embodiment of the present invention, the clamping block is provided with a clamping arc surface adapted to the outer wall of the conduit on the side near the positioning groove, and the clamping arc surface is provided with a protruding structure for enhancing friction.

[0017] In a preferred embodiment of the present invention, the protruding structure comprises a plurality of spike-shaped clamping strips, which are distributed circumferentially along the clamping arc surface, and the clamping strips are made of an elastic material.

[0018] In a preferred embodiment of the present invention, the base is provided with an extension plate on the side near the positioning groove, and the extension plate is provided with an extension groove, which is coaxial with and connected to the positioning groove.

[0019] In a preferred embodiment of the present invention, the operating part is a rotary handle, which is fixedly connected to a threaded rod, and the outer wall of the rotary handle is provided with anti-slip texture.

[0020] In a preferred embodiment of the present invention, the base is provided with connecting portions on both sides for connecting and fixing straps, and the connecting portions are provided with hole structures for the fixing straps to pass through.

[0021] In a preferred embodiment of the present invention, the inner wall of the positioning groove is provided with a flexible protective layer for protecting the conduit, and the flexible protective layer is made of silicone or rubber.

[0022] The beneficial effects of this invention are:

[0023] 1. The present invention has a simple structure. By setting a connecting mechanism that can be threadedly connected to the threaded rod, the switching between clamping and locking states is realized. In the clamping state, the clamping block can be moved quickly to position the guide tube. In the locking state, the clamping force can be precisely adjusted by rotating the threaded rod. This effectively solves the problem that existing fixers are difficult to control the tightness of guide tubes of different sizes, and avoids guide tube displacement or deformation.

[0024] 2. The user-friendly design of the rotating handle and the threaded transmission mechanism of this invention simplify the catheter fixation operation to a single-handed rotation action, which medical staff can master without complicated training; the detachable structure of the clamping block and the quick adjustment function of the Velcro strap further shorten the assembly, disassembly and wearing time of the fixator; effectively improving the work efficiency of medical staff.

[0025] 3. The threaded rod of this invention is detachably rotatably connected to a clamping block, making cleaning and maintenance convenient: the detachable design of the clamping block complies with hospital infection control standards, allowing medical staff to promptly and specifically clean and disinfect contaminated components, reducing the risk of cross-infection. Simultaneously, this modular design facilitates the replacement of fixation device components; when a component is damaged, it is not necessary to replace the entire fixation device, only the corresponding component needs to be replaced, reducing medical costs.

[0026] 4. The clamping block and the guide device of the present invention are integrally formed, and the threaded rod and the clamping block adopt a snap-fit ​​structure of spherical guide body and limit seat. The double anti-drop design can effectively prevent the clamping block from falling off during use, reduce the risk of patients swallowing it, and improve the safety of use.

[0027] 5. The cooperation between the guiding device and the guiding groove of the present invention can limit the movement direction of the clamping block and ensure clamping accuracy; the extension groove on the extension plate can support and limit the protruding part of the guide tube, further improving the fixing effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the catheter fixator according to an embodiment of the present invention;

[0029] Figure 2 This is a bottom view of the catheter fixator according to an embodiment of the present invention;

[0030] Figure 3 This is an exploded view of the catheter fixator according to an embodiment of the present invention;

[0031] Figure 4 This is an embodiment of the present invention. Figure 2 A magnified view of the local area in direction A;

[0032] Figure 5 This is a schematic diagram of the connection mechanism according to an embodiment of the present invention (I);

[0033] Figure 6This is a schematic diagram (II) of the connection mechanism according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the threaded rod according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the clamping block in an embodiment of the present invention (I);

[0036] Figure 9 This is a schematic diagram (II) of the structure of the clamping block according to an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of the base according to an embodiment of the present invention;

[0038] The attached figures are labeled as follows: 1. Base; 2. Notch; 3. Positioning groove; 4. Positioning component; 5. Guide hole; 6. Threaded rod; 7. Clamping block; 8. Pressing plate; 9. Guide device; 10. Extension plate; 11. Extension groove; 14. Guide groove; 15. Disassembly groove; 21. Mounting plate; 23. Positioning cavity; 24. Connecting mechanism; 40. Support block; 42. Connecting plate; 43. Connecting groove; 44. Locking plate; 45. Threaded section; 46. Spherical guide body; 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

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] Example: Figures 1-3As shown, the catheter fixator includes a base 1 with a notch 2 for catheter insertion and a positioning groove 3 communicating with the notch 2. In this embodiment, the catheter can be an endotracheal tube or a laryngeal mask airway tube. A positioning component 4 is located on the side of the base 1 away from the positioning groove 3. The positioning component 4 has a channel for a threaded rod 6 to pass through. One end of the threaded rod 6 has an operating part, and the other end of the threaded rod 6 is connected to a clamping block 7 via an anti-disengagement connection structure. The clamping block 7 cooperates with the positioning groove 3 to clamp the catheter. The positioning component 4 is equipped with an elastically deformable connecting mechanism 40, which can be disengaged... Switching between engagement and disengagement states: In the disengaged state, the connecting mechanism 40 is not in contact with the threaded rod 6, and the threaded rod 6 can drive the clamping block 7 to move quickly along the channel; in the engaged state, the connecting mechanism 40 and the threaded rod 6 are threadedly engaged, and rotating the operating part can drive the threaded rod 6 to move to adjust the clamping force of the clamping block 7 on the guide tube; the clamping block 7 is provided with a guide device 9, and the base 1 is provided with a guide structure adapted to the guide device 9. The guide device 9 and the guide structure cooperate to limit the movement direction of the clamping block 7; the base 1 is also provided with a disassembly and assembly structure communicating with the guide structure, through which the clamping block 7 can be separated from the base 1.

[0041] The base 1 has a notch 2 and a positioning groove 3 for quick insertion and initial positioning of the guide tube; the positioning component 4 allows the threaded rod 6 to pass through, one end of the threaded rod 6 has an operating part (such as a rotating handle 64), and the other end is connected to the clamping block 7 through an anti-detachment connection structure; the connecting mechanism 40 can switch between disengagement and engagement states to achieve rapid movement and precise force control; the guide device 9 works with the guide structure to limit the movement direction of the clamping block, and the disassembly and assembly structure facilitates the separation of the clamping block.

[0042] The combination of notch 2 and positioning groove 3 solves the problem of difficult insertion of traditional fixation catheters, enabling rapid catheter positioning and improving operational efficiency in emergency situations. The anti-dislodgement connection structure fundamentally prevents the clamping block 7 from separating from the threaded rod 6, avoiding the risk of accidental swallowing by patients and significantly improving safety. The dual-state switching of the connection mechanism 40 not only meets the emergency needs of rapid clamping but also allows for precise adjustment of clamping force through thread engagement, solving the problem of difficult control of the tightness of existing fixation devices.

[0043] The coordination between the guide device and the guide structure ensures the stability of the movement direction of the clamping block 7, avoids clamping failure due to deviation, and improves the fixing accuracy; the disassembly structure facilitates the cleaning and replacement of the clamping block 7, solves the problem of traditional fixation components being non-removable and difficult to clean, and meets the hygiene requirements of medical equipment.

[0044] Reference Figure 4 — Figure 6As shown, the positioning component 4 includes at least two positioning plates 23 arranged opposite to each other. The positioning plates 23 are provided with guide holes 5 for the threaded rod 6 to pass through. The guide holes 5 constitute at least a part of the channel. The positioning component 4 also includes two mounting plates 21 connecting the two positioning plates 23. The two positioning plates 23 and the two mounting plates 21 enclose a positioning cavity 24 for accommodating the connecting mechanism 40.

[0045] The guide hole 5 provides precise guidance for the threaded rod 6, preventing it from shaking during movement and ensuring that the clamping block 7 moves stably closer to or further away from the guide tube, thus improving movement stability. At the same time, the positioning cavity 24 provides a stable installation space for the connecting mechanism 40 and limits the deformation range of the connecting mechanism 40, preventing it from being damaged due to excessive deformation and extending its service life.

[0046] Reference Figure 4 As shown, the connecting mechanism 40 includes a pressing part, a supporting part, and a locking part. The supporting part connects the pressing part and the locking part, and the locking part is provided with a threaded section 46. When the pressing part is pressed, the supporting part undergoes elastic deformation, causing the threaded section 46 to disengage from the threaded rod 6, thus forming the disengaged state. When the force applied to the pressing part is removed, the supporting part resets, causing the threaded section 46 to engage with the threaded rod 6, thus forming the engaged state.

[0047] The press-type switching operation is simple and can be completed by medical staff with one hand, solving the problem that traditional fixation devices require two hands to switch, thus improving the convenience of operation. Moreover, the elastic deformation of the support part drives the threaded section 46 to completely disengage / engage, realizing the threaded rod 6 to move quickly without resistance. When engaged, the threaded contact area is large, and the clamping force is stable and not easily weakened.

[0048] Reference Figure 4 — Figure 6 As shown, the pressing part includes a pressing plate 8, the supporting part includes supporting blocks 42 symmetrically arranged on both sides of the pressing plate 8, the end of the supporting block 42 away from the pressing plate 8 is connected to an inclined connecting plate 43, the locking part includes a locking plate 45 provided at the connection between the supporting block 42 and the connecting plate 43, the threaded section 46 is provided on the side of the locking plate 45 near the threaded rod 6; a connecting groove 44 for the threaded rod 6 to pass through is formed between the two supporting blocks 42.

[0049] The design of the symmetrical support block 42 ensures that the connecting mechanism 40 is subjected to uniform force, avoiding the meshing deviation between the threaded section 46 and the threaded rod 6 caused by unilateral deformation, and ensuring precise adjustment of clamping force. At the same time, the inclined connecting plate 43 enhances the elastic deformation capability of the support, making the pressing operation less strenuous and improving the fatigue resistance of the support. Furthermore, the connecting groove 44 provides an independent space for the threaded rod 6 to pass through, avoiding friction between the threaded rod and other parts of the connecting mechanism 40, reducing wear, and extending service life.

[0050] Reference Figure 7As shown, the anti-detachment connection structure includes a protrusion structure at the end of the threaded rod 6 and a limiting structure on the clamping block 7; the protrusion structure and the limiting structure cooperate to restrict the threaded rod 6 and the clamping block 7 from separating along the axial direction of the threaded rod 6, and the protrusion structure can rotate relative to the limiting structure.

[0051] The combination of the protrusion and the limiting structure enables the threaded rod 6 and the clamping block 7 to be "rotatable but not separable", which not only meets the need for the clamping block 7 to adjust the angle to adapt to the outer wall of the conduit, but also completely eliminates the risk of component separation, greatly improving safety. The structure is simple and reliable, requiring no additional fasteners, reducing assembly complexity, and reducing the number of parts, thus reducing the probability of failure.

[0052] The protruding structure is a spherical guide body 60, and a limiting groove 61 is formed between the spherical guide body 60 and the threaded rod 6; the limiting structure is a stepped limiting seat 73 provided in the through hole 72 of the clamping block 7; the spherical guide body 60 passes through the through hole 72, and the limiting seat 73 is engaged in the limiting groove 61.

[0053] The arc-shaped structure of the spherical guide 60 allows the threaded rod 6 to rotate at multiple angles relative to the clamping block 7, ensuring that the clamping arc surface 70 of the clamping block 7 completely fits the outer wall of catheters of different diameters, thus improving clamping stability. The snap-fit ​​between the limiting seat 73 and the limiting groove 61 achieves "zero risk of detachment," ensuring stable connection of components even when the patient is violently agitated, demonstrating significant safety advantages. The spherical structure is easy to process and assemble, reducing production costs, while avoiding scratch damage to the catheter caused by sharp-angled structures.

[0054] The end of the spherical guide body 60 is provided with a guide slope 63, and the outer wall of the spherical guide body 60 is provided with a guide groove 62, which extends to the limiting groove 61.

[0055] The guide slope 63 guides the spherical guide body 60 to quickly pass through the through hole 72 during assembly, improving assembly efficiency; the guide recess 62 further assists in assembly positioning, ensuring that the limit seat 73 is accurately engaged in the limit groove 61, avoiding rotational obstruction caused by assembly deviation, and at the same time can accommodate small debris generated during assembly, ensuring rotational flexibility.

[0056] Reference Figure 8 and Figure 9As shown, the guiding device 9 includes a connecting block 90, a limiting block 91, and a guiding block 92. The connecting block 90 connects the clamping block 7 and the limiting block 91. The guiding block 92 is located at one end of the limiting block 91. The guiding structure is a guiding groove 14 on the base 1. The limiting block 91 is embedded in the guiding groove 14 and can slide along it. The adaptive sliding of the guiding block 92 and the guiding groove 14 strictly limits the clamping block 7 to move only in the vertical direction along the axis of the conduit, avoiding lateral displacement of the clamping block 7 that would cause uneven pressure on the conduit. The integrated design of the connecting block 90 and the limiting block 91 enhances the structural strength of the guiding device 9, prevents breakage of the guiding components, and improves overall durability.

[0057] Reference Figure 10 As shown, the disassembly and assembly structure is a disassembly and assembly groove 15 that communicates with the guide groove 14. The width of the disassembly and assembly groove 15 is adapted to the width of the guide block 92. After rotating the clamping block 7 to align the guide block 92 with the disassembly and assembly groove 15, the guide block 92 can be moved out along the disassembly and assembly groove 15.

[0058] The design of the disassembly groove 15 enables quick disassembly of the clamping block 7 without the need for special tools; the operation method of simply rotating to align the disassembly groove 15 is simple and convenient, allowing medical staff to replace the clamping block 7 in a short time and improving the efficiency of equipment use.

[0059] The disassembly groove 15 is connected to the guide groove 14 and the width is matched to ensure that the guide block 92 does not get stuck during disassembly and assembly, thus avoiding damage to the components due to structural interference.

[0060] The specific process of disassembling and assembling the clamping block 7 from the threaded rod 6 and the base 1 is as follows:

[0061] Pinch the end of the spherical guide 60 with your thumb and forefinger, corresponding to Figure 7 In the area where the guide ramp 63 is located, apply uniform pressure along the axis of the threaded rod 6 towards the clamping block 7. The recommended pressure is 8-12N, with the aim of causing the guide ramp to shrink in a controllable manner.

[0062] The spherical guide 60 is made of slightly elastic medical plastic material. When pressed, the guide slopes 63 at both ends are squeezed and contract inward, which causes the spacing of the guide grooves 62 on the outer wall of the spherical guide to decrease synchronously. Referring to the communication structure between the guide grooves 62 and the limiting grooves 61 in Figure 7, the reduction of the groove spacing will reduce the overall outer diameter of the spherical guide, thereby reducing the resistance to the fit with the through hole 72 of the clamping block 7.

[0063] Continue pressing the spherical guide body 60 and observe the through hole 72 area of ​​the clamping block 7, referring to... Figure 8 Stepped limiting seat 73 inside the through hole 72.

[0064] When the guide slope 63 contracts to its maximum extent, the maximum outer diameter of the spherical guide body 60 is smaller than the inner diameter of the limiting seat 73. At this time, the locking and limiting effect of the limiting seat 73 on the limiting groove 61 fails.

[0065] While maintaining the pressing state, slowly pull the threaded rod 6 away from the clamping block 7 to make the spherical guide 60 disengage from the through hole 72, completing the separation of the clamping block and the threaded rod. At the moment of separation, it can be observed that the guide groove 62 returns to its initial spacing, proving that the spherical guide elastically resets without structural damage.

[0066] The clamping block 7, which is separated from the threaded rod, still has its guide device 9 embedded in the guide groove 14 of the base 1. Referring to the communication relationship between the guide groove 14 and the disassembly groove 15 in Figure 10, adjust the angle of the clamping block so that the guide block 92 is aligned with the extension direction of the guide groove 14 to avoid initial position deviation that could cause rotational jamming.

[0067] Combination Figure 10 The width of the disassembly groove 15 is adapted to the guide block 92 to determine the rotation direction of the clamping block (clockwise or counterclockwise is acceptable, depending on whether the guide block can quickly align with the disassembly groove). The typical rotation angle is 90° (because the guide groove and the disassembly groove are perpendicularly distributed, this can be achieved through...). Figure 10 The opening direction of the disassembly and assembly groove is used to assist in judgment; when it is observed that both ends of the guide block 92 are completely aligned with the opening of the disassembly and assembly groove 15 (i.e., the axis of the guide block coincides with the axis of the disassembly and assembly groove), the rotation is stopped, and the limiting relationship between the guide device and the base is released.

[0068] Reference Figure 9 As shown, the clamping block 7 has a clamping arc surface 70 that is adapted to the outer wall of the catheter on the side near the positioning groove 3. The clamping arc surface 70 has a raised structure for enhancing friction. The clamping arc surface 70 has a high degree of fit with the outer wall of the catheter, increasing the contact area and avoiding excessive local pressure that could cause catheter deformation. The raised structure enhances the friction between the clamping block 7 and the outer wall of the catheter, preventing the catheter from slipping even when the patient is slightly agitated, and significantly improving clamping stability.

[0069] The protruding structure consists of multiple spike-shaped clamping strips 71, which are distributed circumferentially along the clamping arc surface 70, and the clamping strips 71 are made of elastic material.

[0070] The spiked structure further increases friction, and the elastic material can slightly deform with the shape of the outer wall of the catheter, ensuring that each clamping bar 71 is in contact with the catheter, avoiding local slippage and improving fixation reliability; the elastic material has a buffering effect, which can absorb the impact force generated by the patient's agitation and prevent the catheter from being damaged by rigid clamping. Silicone material can be selected as the elastic material.

[0071] Reference Figure 10As shown, the base 1 has an extension plate 10 on the side near the positioning groove 3. The extension plate 10 has an extension groove 11 inside. The extension groove 11 is coaxial with and connected to the positioning groove 3. The extension groove 11 supports the part of the catheter that extends out of the positioning groove 3, preventing the catheter from sagging due to its own weight and causing uneven force at the positioning groove 3. The coaxial design ensures that the catheter is in a straight line, avoiding the impact of bending on airway patency, ensuring the patient's breathing safety, and improving the integrity of fixation.

[0072] Reference Figure 4 and Figure 9 As shown, the operating part is a rotary handle 64, which is fixedly connected to the threaded rod 6, and the outer wall of the rotary handle 64 is provided with anti-slip texture. The rotary handle 64 increases the force application area, making it easier for medical staff to rotate the threaded rod 6. The anti-slip texture prevents slippage caused by sweaty hands, ensuring stable force application during emergency operations, precise adjustment of clamping force, improved operational reliability, and better ergonomic performance.

[0073] The base 1 has connecting parts on both sides for connecting the fixing strap. The connecting parts have hole structures for the fixing strap to pass through. The fixing strap can securely fix the base 1 to the patient's head through the hole structure to prevent the entire fixator from shifting. The hole structure is compatible with fixing straps of different widths. The length of the fixing strap can be adjusted according to the patient's head circumference to improve wearing comfort and make it more widely applicable.

[0074] The inner wall of the positioning groove 3 is provided with a flexible protective layer for protecting the catheter. The flexible protective layer is made of silicone or rubber. The flexible protective layer avoids rigid contact between the outer wall of the catheter and the base 1, preventing the catheter from being scratched and damaged. The silicone or rubber has a certain friction force, which can help fix the catheter, reduce the slight sliding of the catheter in the positioning groove 3, and further improve the fixation stability, meeting the stringent requirements of medical devices for catheter protection.

[0075] In this embodiment, the steps for using the catheter fixator are as follows:

[0076] Step 1: Base Fixation: Pass the elastic bandage through the bandage holes on both sides of the base 1, place the base above the patient's mouth (align the positioning groove with the airway direction), adjust the length of the bandage, and fix it with Velcro to ensure that the base does not shift significantly.

[0077] Step 2: Inserting the catheter: Press the pressing plate 8 of the connecting mechanism 40 to disengage the threaded section 46 from the threaded rod 6, push the rotating handle 64 to move the clamping block 7 along the guide groove 14 away from the positioning groove 3, forming a partial clamping gap; insert the endotracheal tube through the notch 2 into the positioning groove 3 and the extension groove 11, ensuring that the catheter axis is coaxial with the positioning groove;

[0078] Step 3: Quick positioning: Keep pressing the pressing plate 41, push the rotating handle 64 in the opposite direction to drive the clamping block 7 to quickly approach the conduit until the clamping bar 71 of the clamping arc surface 70 initially contacts the outer wall of the conduit. Release the pressing plate, the connecting mechanism resets, and the threaded section engages with the threaded rod.

[0079] Step 4: Precise locking: Turn the rotating handle 64 clockwise and adjust the clamping force according to the catheter diameter. Based on clinical experience, if the catheter does not wobble significantly and does not deform when squeezed, the fixation is complete.

[0080] Step 5: Postoperative maintenance: If cleaning or replacement of the clamping block is required, rotate the handle counterclockwise to move the clamping block away from the catheter and remove the catheter; rotate the clamping block 90° to align the guide block 92 with the disassembly groove 15, move the clamping block out along the disassembly groove, clean it and reset it according to the assembly steps.

[0081] The above description of the disclosed embodiments enables those skilled in the art to make or use the 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 invention; therefore, the 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.

[0082] Although this document frequently uses reference numerals from the figures, such as: base 1, notch 2, positioning groove 3, positioning assembly 4, guide hole 5, threaded rod 6, clamping block 7, pressing plate 8, guide device 9, extension plate 10, extension groove 11, guide groove 14, disassembly groove 15, mounting plate 21, positioning plate 23, positioning cavity 24, connecting mechanism 40, support block 42, connecting plate 43, connecting groove 44, locking plate 45, threaded segment 46, 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 the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A catheter fixator, characterized in that: The device includes a base (1) with a notch (2) for a conduit to enter and a positioning groove (3) communicating with the notch (2) inside the base (1); a positioning component (4) is provided on the side of the base (1) away from the positioning groove (3), and a channel for a threaded rod (6) to pass through is provided inside the positioning component (4). One end of the threaded rod (6) is provided with an operating part, and the other end of the threaded rod (6) is connected to a clamping block (7) through an anti-detachment connection structure. The clamping block (7) cooperates with the positioning groove (3) to clamp the conduit; and a flexible connecting mechanism (40) is mounted on the positioning component (4). The connecting mechanism (40) can switch between a disengaged state and an engaged state: in the disengaged state, the connecting mechanism (40) and the threaded rod (6) are not in contact, and the threaded rod (6) can drive the clamping block (7) to move quickly along the channel; in the engaged state, the connecting mechanism (40) and the threaded rod (6) are threadedly engaged, and rotating the operating part can drive the threaded rod (6) to move to adjust the clamping force of the clamping block (7) on the guide tube; the clamping block (7) is provided with a guide device (9), and the base (1) is provided with a guide structure adapted to the guide device (9). The guide device (9) and the guide structure cooperate to limit the clamping force. The direction of movement of the holding block (7); the base (1) is also provided with a disassembly and assembly structure connected to the guide structure, through which the holding block (7) can be separated from the base (1); the dual-state switching of the connecting mechanism (40) not only meets the emergency needs of quick clamping, but also can accurately adjust the clamping force through thread engagement; the connecting mechanism (40) includes a pressing part, a supporting part and a locking part, the supporting part connects the pressing part and the locking part, and the locking part is provided with a threaded section (46); when the pressing part is pressed, the supporting part undergoes elastic deformation, causing the threaded section (46) to disengage from the threaded rod (6), thus forming the disengaged state. When the force applied to the pressing part is removed, the support part resets so that the threaded section (46) engages with the threaded rod (6), thus forming the engagement state. The support part includes support blocks (42) symmetrically arranged on both sides of the pressing part. The end of the support block (42) away from the pressing part is connected to an inclined connecting plate (43). The locking part includes a locking plate (45) located at the connection between the support block (42) and the connecting plate (43). The threaded section (46) is located on the side of the locking plate (45) near the threaded rod (6). A connecting groove (44) for the threaded rod (6) to pass through is formed between the two support blocks (42).

2. The catheter fixator according to claim 1, characterized in that, The positioning assembly (4) includes at least two positioning plates (23) arranged opposite to each other. The positioning plates (23) are provided with guide holes (5) for threaded rods (6) to pass through. The guide holes (5) constitute at least a part of the channel. The positioning assembly (4) also includes two mounting plates (21) connecting the two positioning plates (23). The two positioning plates (23) and the two mounting plates (21) enclose a positioning cavity (24) for accommodating the connecting mechanism (40).

3. The catheter fixator according to claim 1, characterized in that, The anti-detachment connection structure includes a protrusion structure at the end of the threaded rod (6) and a limiting structure on the clamping block (7); the protrusion structure and the limiting structure cooperate to restrict the threaded rod (6) and the clamping block (7) from separating along the axial direction of the threaded rod (6), and the protrusion structure can rotate relative to the limiting structure.

4. The catheter fixator according to claim 3, characterized in that, The protruding structure is a spherical guide (60), and a limiting groove (61) is formed between the spherical guide (60) and the threaded rod (6); the limiting structure is a stepped limiting seat (73) provided in the through hole (72) of the clamping block (7); the spherical guide (60) passes through the through hole (72), and the limiting seat (73) is inserted into the limiting groove (61).

5. The catheter fixator according to claim 4, characterized in that, The end of the spherical guide (60) is provided with a guide slope (63), and the outer wall of the spherical guide (60) is provided with a guide groove (62), which extends to the limiting groove (61).

6. The catheter fixator according to claim 1, characterized in that, The guiding device (9) includes a connecting block (90), a limiting block (91) and a guiding block (92). The connecting block (90) connects the clamping block (7) and the limiting block (91). The guiding block (92) is located at one end of the limiting block (91). The guiding structure is a guiding groove (14) on the base (1). The limiting block (91) is embedded in the guiding groove (14) and can slide along it.

7. The catheter fixator according to claim 6, characterized in that, The disassembly and assembly structure is a disassembly and assembly groove (15) that communicates with the guide groove (14). The width of the disassembly and assembly groove (15) is adapted to the width of the guide block (92). After rotating the clamping block (7) to align the guide block (92) with the disassembly and assembly groove (15), the guide block (92) can be moved out along the disassembly and assembly groove (15).

8. The catheter fixator according to claim 1, characterized in that, The clamping block (7) has a clamping arc surface (70) adapted to the outer wall of the conduit on the side near the positioning groove (3). The clamping arc surface (70) has a protrusion structure for enhancing friction. The protrusion structure consists of multiple clamping strips (71) in the shape of spikes, and the multiple clamping strips (71) are distributed circumferentially along the clamping arc surface (70).

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