An ECMO cannula anti-migration device with hierarchical load unloading and multi-axis stress recognition function

Abstract

The application discloses an ECMO cannula anti-migration device with hierarchical load unloading and multi-axis stress recognition functions and belongs to the field of medical apparatuses, which comprises a base, a protection frame and a pipeline, two second telescopic rods are fixedly connected to the upper and lower sides in the protection frame, the two second telescopic rods are arranged in mirror image with the center of the protection frame as the center, arc-shaped blocks are fixedly connected to the end portions of the two second telescopic rods, third springs are sleeved on the outer portions of the two second telescopic rods, when the pipeline is subjected to an upward pulling force, the pipeline tends to be straightened, the straightened pipeline extrudes the arc-shaped blocks on the two sides, drives the two second telescopic rods to synchronously retract, and the third springs are compressed; the upward pulling load of the pipeline is absorbed by the compression deformation of the third springs, the buffer unloading of the pulling force is realized, the upward pulling force is avoided from being directly transmitted to the human body cannula part, and the risk that the cannula is pulled, displaced and taken out is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to an ECMO cannula anti-migration device with graded load unloading and multi-axis force recognition functions. Background Technology

[0002] ECMO, or extracorporeal membrane oxygenation, is an important life support treatment. In clinical use, it is necessary to establish an extracorporeal circulation pathway through intubation. One end of the ECMO cannula is left in the patient's body, and the other end is connected to the external device through a tubing. The treatment cycle is often long, and the tubing is easily affected by various external forces such as the patient's limb movements, medical staff touching it, and equipment pulling.

[0003] Under current clinical conditions, most ECMO cannulas and related tubing are fixed by adhesive tape or dressings. This method of fixation has limited reliability. When the tubing is subjected to traction, bumps, vibration, or impact, the external force can be directly transmitted to the cannula in the body, which can easily cause the cannula to shift or fall out. Once the cannula migrates or falls out, it can directly cause serious medical accidents such as bleeding and circulatory interruption, endangering the patient's life.

[0004] Currently, some pipeline fixing devices have also emerged. These devices are mostly rigid clamping structures. Although they can limit the pipeline, rigid clamping can easily squeeze and damage the ECMO pipeline wall. At the same time, most fixing devices only have simple clamping and limiting functions and do not have load buffering and unloading capabilities. Summary of the Invention

[0005] 1. Technical problems to be solved In view of the problems existing in the prior art, the purpose of the present invention is to provide an ECMO cannula anti-migration device with graded load unloading and multi-axis force recognition functions, so as to solve the problems mentioned in the background art.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] An ECMO cannula anti-migration device with graded load unloading and multi-axis force recognition functions includes a base, a protective frame, and a pipe. Two second telescopic rods are fixedly connected to the upper and lower sides inside the protective frame. The two second telescopic rods are arranged in a mirror image with the center of the protective frame as the center. An arc-shaped block is fixedly connected to the end of each of the two second telescopic rods. A third spring is sleeved on the outside of each of the two second telescopic rods.

[0009] Furthermore, the protective frame is internally fixedly connected with multiple support rods, and both arc-shaped blocks are slidably connected to the support rods.

[0010] Furthermore, a limiting block is fixedly connected to one side of each of the two arc-shaped blocks, and the pipe slides inside the two limiting blocks.

[0011] Furthermore, both sides of the base are fixedly connected to a fixing rod, and a mounting frame is slidably connected to the outside of the fixing rod.

[0012] Furthermore, a first spring is fitted onto the outer wall of each of the two fixing rods, and the first spring is located between the base and the mounting frame.

[0013] Furthermore, a plurality of first telescopic rods are fixedly connected inside the mounting frame, and the ends of the plurality of first telescopic rods are jointly fixedly connected to a fixed frame. A second spring is sleeved on the outside of each of the plurality of first telescopic rods, and the protective frame is fixedly connected inside the fixed frame.

[0014] Furthermore, a mounting base is fixedly connected to the top of the protective frame, and the pipe is located inside the mounting base.

[0015] Furthermore, the outer wall of the mounting base is threadedly connected to a threaded sleeve, and a lifting sleeve is rotatably connected above the threaded sleeve. Multiple extrusion rods are fixedly connected at equal intervals inside the lifting sleeve.

[0016] Furthermore, the mounting base is internally rotatably connected to multiple rotating rods, each of which has a roller mounted on its upper end and a sliding groove formed at its lower end.

[0017] Furthermore, the mounting base has multiple vertical slots equidistantly spaced inside, and each of the extrusion rods is slidably connected to the vertical slots and the sliding grooves.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of this invention are: (1) In this invention, when the pipe is subjected to an upward pulling force, the pipe tends to be taut. The taut pipe will squeeze the arc blocks on both sides, causing the two second telescopic rods to retract synchronously, and the third spring is compressed. The compression deformation of the third spring absorbs the upward pulling load of the pipe, realizing the buffer unloading of the pulling force, avoiding the upward pulling force from being directly transmitted to the human body insertion site, and reducing the risk of the insertion tube being pulled out or dislodged.

[0020] (2) In this invention, the fixed rods on both sides inside the base provide sliding guidance for the mounting frame. The first spring, which is sleeved on the outer wall of the fixed rod, is located between the base and the mounting frame. When external disturbances are transmitted to the mounting frame, the mounting frame can slide along the fixed rod. The deformation of the first spring absorbs the horizontal impact load, realizes the first layer of floating buffer, weakens the external force caused by external vibration and collision, and reduces the external force transmitted upward to the pipeline.

[0021] (3) In this invention, multiple first telescopic rods are arranged inside the mounting frame, and second springs are sleeved on the outside of the first telescopic rods. The top of the first telescopic rods jointly support the fixed frame, and the protective frame is fixed inside the fixed frame. The first telescopic rods and the second springs form a second layer of buffer structure, which can buffer and unload the vertical impact and pulling force. It works in conjunction with the horizontal buffer of the lower base-mounting frame to achieve multi-directional composite buffer protection and further reduce the transmission of various external forces to the pipeline. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram showing the connection relationship between the protective frame and the base in this invention; Figure 3 This is a schematic diagram of the base structure of the present invention; Figure 4 for Figure 3 Enlarged structural diagram of region A in the middle; Figure 5 This is a schematic diagram of the internal structure of the protective frame in this invention; Figure 6 for Figure 5 A magnified structural diagram of region B in the middle; Figure 7 This is a schematic diagram of the internal structure of the mounting base in this invention; Figure 8 for Figure 7 A magnified structural diagram of region C in the middle; Figure 9 This is a schematic diagram showing the connection relationship between the threaded sleeve and the lifting sleeve in this invention.

[0023] Explanation of the labels in the diagram: 1. Base; 10. Pipe; 11. Fixing rod; 12. First spring; 13. Mounting frame; 14. First telescopic rod; 15. Second spring; 16. Fixing frame; 17. Protective frame; 18. Second telescopic rod; 19. Third spring; 2. Arc-shaped block; 21. Limiting block; 22. Support rod; 23. Mounting seat; 24. Threaded sleeve; 25. Lifting sleeve; 26. Extrusion rod; 27. Vertical groove; 28. Rotating rod; 29. ​​Sliding groove; 3. Roller. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Example 1:

[0028] Please see Figures 1-9 An ECMO cannula anti-migration device with graded load unloading and multi-axis force recognition functions includes a base 1, a protective frame 17, and a pipe 10. Two second telescopic rods 18 are fixedly connected to the upper and lower sides inside the protective frame 17. The two second telescopic rods 18 are arranged in a mirror image with the center of the protective frame 17 as the center. An arc-shaped block 2 is fixedly connected to the end of each of the two second telescopic rods 18. A third spring 19 is sleeved on the outside of each of the two second telescopic rods 18. Multiple support rods 22 are fixedly connected inside the protective frame 17. The two arc-shaped blocks 2 are slidably connected to the support rods 22. A limit block 21 is fixedly connected to one side of each of the two arc-shaped blocks 2. The pipe 10 slides inside the two limit blocks 21.

[0029] In this embodiment, two sets of second telescopic rods 18 arranged in a mirror image inside the protective frame 17, together with the third spring 19, drive the arc-shaped block 2 to clamp the pipe 10. This is a flexible and elastic clamping method, which avoids the rigid clamping from causing squeezing damage to the pipe wall of the pipe 10. When the pipe 10 is subjected to pulling or lateral impact forces, the second telescopic rods 18 can adapt to the extension and retraction of the third spring 19, which can buffer and absorb the impact load on the pipe 10, realize the graded unloading of the load, effectively suppress the migration and slippage of the pipe 10, and ensure the stability and reliability of the pipeline.

[0030] The two arc-shaped blocks 2 are slidably connected to the support rod 22. The support rod 22 plays a guiding and constraining role on the arc-shaped blocks 2, ensuring that the arc-shaped blocks 2 only move in a straight line along the radial direction, avoiding the second telescopic rod 18 and the third spring 19 from being tilted or twisted by the force, improving the motion stability of the clamping action of the arc-shaped blocks 2, ensuring the balance of the clamping force on both sides, and preventing the pipe 10 from being deviated by the eccentric load.

[0031] A limiting block 21 is provided on the arc-shaped block 2, and the pipe 10 is slidably assembled between the two limiting blocks 21. The limiting block 21 forms an axial limiting constraint on the pipe 10, which restricts the pipe 10 from moving around significantly while allowing the pipe 10 to slide slightly and buffer, thereby further reducing the risk of pipe displacement and dislodgement. At the same time, the limiting block 21 is linked with the arc-shaped block 2 and adjusts its position synchronously with the clamping mechanism, without the need for additional independent limiting parts.

[0032] Two sets of second telescopic rods 18 are arranged in a mirror symmetrical manner with the center of the protective frame 17. The arc-shaped blocks 2 on both sides apply opposing and balanced clamping forces to the pipe 10, so that the pipe 10 is automatically kept in the center position of the protective frame 17. The clamping force is uniform, and it is not easy to cause the pipe wall to be crushed on one side. It is suitable for pipes 10 within a certain outer diameter tolerance range, and has better versatility.

[0033] The second telescopic rod 18 acts as an internal guide and limiter for the third spring 19, preventing lateral instability and tilting during the compression and stretching process of the third spring 19, ensuring stable spring force output of the third spring 19, and preventing the spring from misaligning and jamming under long-term repeated buffering vibration conditions, thus improving the overall fatigue resistance of the device.

[0034] When the pipe 10 is subjected to an upward pulling force, it tends to straighten. The straightened pipe 10 compresses the arc-shaped blocks 2 on both sides, causing the two second telescopic rods 18 to retract synchronously, and the third spring 19 is compressed. The compression deformation of the third spring 19 absorbs the upward pulling load of the pipe 10, achieving buffering and unloading of the pulling force, avoiding the direct transmission of the upward pulling force to the human insertion site, and reducing the risk of the insertion tube being pulled out or dislodged. Example 2:

[0035] Please see Figures 1-9An ECMO cannula anti-migration device with graded load unloading and multi-axis force recognition functions is disclosed. A base 1 has two fixed rods 11 fixedly connected to both sides inside. A mounting frame 13 is slidably connected to the outside of each fixed rod 11. A first spring 12 is sleeved on the outer wall of each fixed rod 11, located between the base 1 and the mounting frame 13. Multiple first telescopic rods 14 are fixedly connected inside the mounting frame 13. The ends of the multiple first telescopic rods 14 are jointly fixedly connected to a fixed frame 16. Second springs 15 are sleeved on the outside of each of the multiple first telescopic rods 14. A protective frame 17 is fixedly connected to the fixed frame 16. Inside, a mounting base 23 is fixedly connected to the top of the protective frame 17. The pipe 10 is located inside the mounting base 23. A threaded sleeve 24 is threadedly connected to the outer wall of the mounting base 23. A lifting sleeve 25 is rotatably connected to the top of the threaded sleeve 24. Multiple extrusion rods 26 are fixedly connected at equal intervals inside the lifting sleeve 25. Multiple rotating rods 28 are rotatably connected inside the mounting base 23. A roller 3 is installed at the upper end of each rotating rod 28. A sliding groove 29 is opened below each rotating rod 28. Multiple vertical grooves 27 are rotatably opened inside the mounting base 23. Each extrusion rod 26 is slidably connected to the vertical groove 27 and the sliding groove 29.

[0036] In this embodiment, the fixing rods 11 provided on both sides inside the base 1 provide sliding guidance for the mounting frame 13. The first spring 12, which is sleeved on the outer wall of the fixing rod 11, is located between the base 1 and the mounting frame 13. When external disturbances are transmitted to the mounting frame 13, the mounting frame 13 can slide along the fixing rod 11. The deformation of the first spring 12 absorbs the horizontal impact load, realizing the first layer of floating buffer, weakening the external force caused by external vibration and collision, and reducing the external force transmitted upward to the pipe 10.

[0037] Multiple first telescopic rods 14 are arranged inside the mounting frame 13. Second springs 15 are sleeved on the outside of the first telescopic rods 14. The tops of the first telescopic rods 14 jointly support the fixed frame 16. The protective frame 17 is fixed inside the fixed frame 16. The first telescopic rods 14 and the second springs 15 form a second layer of buffer structure, which can buffer and unload vertical impact and pulling forces. It works in conjunction with the horizontal buffer of the lower base 1-mounting frame 13 to achieve multi-directional composite buffer protection, further reducing the transmission of various external forces to the pipe 10 and preventing the pipe from being displaced by external force disturbance.

[0038] The first telescopic rod 14 can guide and constrain the second spring 15, preventing the second spring 15 from shifting laterally, twisting or jamming during compression and rebound, ensuring stable spring force output of the second spring 15, improving the smoothness of the overall movement of the fixed frame 16 and the protective frame 17, and extending the service life of the buffer components.

[0039] A mounting base 23 is fixedly installed on the top of the protective frame 17. The pipe 10 passes through the inside of the mounting base 23. The outer wall of the mounting base 23 is threaded with a threaded sleeve 24. Rotating the threaded sleeve 24 can drive the lifting sleeve 25 to achieve axial lifting. The pressing rod 26 on the inner side of the lifting sleeve 25 slides along the vertical groove 27 and the sliding groove 29, thereby driving the rotating rod 28 to deflect and change the degree of compression of the roller 3 on the pipe 10. The pre-clamping degree can be adjusted according to different specifications of pipe 10, and it is suitable for use with ECMO cannulas of various diameters.

[0040] The extrusion rod 26 slides in conjunction with both the vertical groove 27 and the sliding groove 29. The vertical groove 27 restricts the radial displacement of the extrusion rod 26, while the sliding groove 29 transmits the extrusion force to drive the rotating rod 28 to swing. The transmission structure is simple and reliable. The roller 3 directly contacts the outer wall of the pipe 10, replacing hard sliding friction with rolling friction. During the clamping and adjustment process, the outer wall of the pipe 10 will not be scratched, thus protecting the integrity of the pipeline.

[0041] The threaded sleeve 24 uses threaded transmission to achieve fine adjustment of the position of the lifting sleeve 25, which can precisely control the clamping pre-tightening force of the roller 3 on the pipe 10. It can not only provide auxiliary positioning constraint for the pipe 10, but also prevent the pipe 10 from being crushed due to excessive clamping force. It is simple to operate and convenient for clinical assembly and debugging.

[0042] Working principle: When using this device, first pass the pipe 10 through the mounting base 23 and the limiting block 21 inside the protective frame 17 to complete the installation of the pipe 10. Rotate the threaded sleeve 24, and the threaded sleeve 24 will move up and down relative to the mounting base 23, driving the lifting sleeve 25 to move axially synchronously. The lifting sleeve 25 drives the internal pressing rod 26 to slide along the vertical groove 27 and the sliding groove 29. The vertical groove 27 constrains the radial position of the pressing rod 26. The pressing rod 26 pushes the sliding groove 29 to deflect each rotating rod 28. The roller 3 at the upper end of the rotating rod 28 retracts inward and abuts against the outer wall of the pipe 10. By rotating the threaded sleeve 24 according to the actual pipe diameter of the pipe 10, the auxiliary pre-clamping force of the roller 3 on the pipe 10 can be adjusted to achieve auxiliary positioning of the upper end of the pipe 10. The roller 3 adopts rolling contact, so it will not scratch the pipe wall of the pipe 10 during the adjustment process.

[0043] After the pipe 10 enters the protective frame 17, the second telescopic rods 18 arranged in mirror on both sides, under the elastic force of the third spring 19, push the arc-shaped block 2 to hug the outer wall of the pipe 10 from both sides; the arc-shaped block 2 slides along the support rod 22, and the support rod 22 provides radial guidance for the arc-shaped block 2, ensuring that the translational movement of the arc-shaped block 2 is smooth. The limiting block 21 forms an axial limit on the pipe 10, allowing the pipe 10 to slide slightly while restricting the pipe 10 from moving significantly.

[0044] When the pipe 10 is subjected to an upward pulling force, the pipe 10 tends to be stretched and straightens. The pipe 10 squeezes the arc-shaped blocks 2 on both sides, causing the second telescopic rods 18 on both sides to retract synchronously and compress the third spring 19. The elastic deformation of the third spring 19 absorbs the upward pulling load and avoids the pulling force being directly transmitted to the human body insertion site.

[0045] The base 1, mounting frame 13, fixing rod 11 and first spring 12 constitute a horizontal floating buffer structure. The mounting frame 13 can slide along the fixing rod 11. When the device is subjected to horizontal impact or lateral pulling disturbance, the mounting frame 13 undergoes horizontal displacement and compresses or stretches the first spring 12. The first spring 12 absorbs the horizontal impact load and weakens the transmission of horizontal external force to the protective frame 17 and the pipe 10.

[0046] Multiple sets of first telescopic rods 14 and second springs 15 are provided between the mounting frame 13 and the fixed frame 16. The protective frame 17 is fixed inside the fixed frame 16. When encountering vertical impact or tensile load, the fixed frame 16 drives the protective frame 17 to compress the second spring 15 through the first telescopic rods 14. The first telescopic rods 14 guide the second spring 15 to prevent the second spring 15 from tilting or getting stuck. The second spring 15 achieves buffering and unloading of vertical impact load.

[0047] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. An ECMO cannula anti-migration device with graded load unloading and multi-axis force recognition functions, comprising a base (1), a protective frame (17), and a pipe (10), characterized in that: The upper and lower sides of the inner side of the protective frame (17) are fixedly connected to two second telescopic rods (18). The two second telescopic rods (18) are arranged in a mirror image with the center of the protective frame (17) as the center. The ends of the two second telescopic rods (18) are fixedly connected to arc blocks (2). The outside of the two second telescopic rods (18) is fitted with a third spring (19).

2. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 1, characterized in that: The protective frame (17) is internally fixedly connected to multiple support rods (22), and the two arc-shaped blocks (2) are slidably connected to the support rods (22).

3. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 2, characterized in that: Each of the two arc-shaped blocks (2) is fixedly connected to a limiting block (21) on one side, and the pipe (10) slides inside the two limiting blocks (21).

4. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 1, characterized in that: The base (1) has fixed rods (11) fixedly connected to both sides inside, and the fixed rods (11) are slidably connected to the outside of the mounting frame (13).

5. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 4, characterized in that: The outer walls of both fixed rods (11) are fitted with first springs (12), which are located between the base (1) and the mounting frame (13).

6. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 5, characterized in that: The mounting frame (13) is internally fixedly connected to a plurality of first telescopic rods (14), the ends of the plurality of first telescopic rods (14) are jointly fixedly connected to a fixed frame (16), and a second spring (15) is sleeved on the outside of the plurality of first telescopic rods (14). The protective frame (17) is fixedly connected inside the fixed frame (16).

7. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 1, characterized in that: A mounting base (23) is fixedly connected above the protective frame (17), and the pipe (10) is located inside the mounting base (23).

8. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 7, characterized in that: The outer wall of the mounting base (23) is threadedly connected to a threaded sleeve (24), and a lifting sleeve (25) is rotatably connected above the threaded sleeve (24). Multiple extrusion rods (26) are fixedly connected at equal intervals inside the lifting sleeve (25).

9. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 8, characterized in that: The mounting base (23) is internally connected to a plurality of rotating rods (28), each of which has a roller (3) mounted on its upper end and a groove (29) provided below each of which is a rotating rod (28).

10. The ECMO cannula anti-migration device with graded load unloading and multi-axis force identification function according to claim 9, characterized in that: The mounting base (23) has multiple vertical grooves (27) equidistantly spaced inside, and each of the extrusion rods (26) is slidably connected to the vertical grooves (27) and the sliding grooves (29).

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