Adjustable bend microcatheter

Abstract

The utility model relates to microcatheter technical field and disclose a kind of adjustable bending microcatheter, including the connecting catheter with elasticity, the connecting catheter both ends are respectively equipped with the steering head and handheld part with elasticity, two symmetrical and having elasticity air bag are equipped in steering head, air bag is arc shape after inflation, and the placing groove that is adapted to air bag is opened in steering head, the communication hole that placing groove is communicated is opened in the one end of connecting catheter, the inflation pipeline that is communicated with air bag is equipped in communication hole, and one end of inflation pipeline extends to handheld part, and inflation pump is equipped in handheld part for inflation, and inflation pump is used to inflate air bag with gas.The utility model discloses, inflation pump carries out inflation in one of air bag, air bag generates inflation, air bag is arc shape after inflation, and by controlling the inflation amount in air bag, the effect of improving steering head bending accuracy is realized.

Description

Technical Field

[0001] This utility model relates to the field of microcatheter technology, specifically to an adjustable bendable microcatheter. Background Technology

[0002] Adjustable bendable microcatheters are medical devices used to provide precise control and positioning in minimally invasive surgery. Their main feature is their ability to bend to adapt to different anatomical structures and surgical needs.

[0003] A search revealed a patent, CN222445093U, which discloses an adjustable microcatheter. The microcatheter includes a handle mechanism with a microcatheter mechanism fixed to its side. The microcatheter mechanism includes a connecting seat fixed to the side of the handle mechanism, and a catheter body fixed to the side of the connecting seat. A support sleeve with a mesh structure is fixed to the inner wall of the catheter body. A guide sleeve is installed on the side of the catheter body via the connecting sleeve. A fixing plate and a fixing ball are fixed inside the guide sleeve. A guide wire is installed on the fixing ball, penetrating the fixing plate and inserted into the catheter body. Compared to existing technologies, this invention, through the handle mechanism and its internal adjustment mechanism, drives the first and second winding reels to rotate. This allows for the unwinding of the second winding rope while winding the first rope, and vice versa, thereby enabling the fixed ball inside the guide sleeve to bend. The device has a simple structure and is very convenient to use.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings:

[0005] The aforementioned comparative documents achieve a micro-bending effect on the tip of the microcatheter by winding up the pull rope. However, in reality, when adjusting the tip of the catheter by pulling the pull rope, the rope may become loose or deformed after prolonged use, resulting in poor bending accuracy of the microcatheter tip. Therefore, there is an urgent need in the field to improve the adjustable microcatheter to overcome the shortcomings of the prior art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an adjustable microcatheter to improve the bending accuracy of the steering head.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adjustable bendable microcatheter, comprising an elastic connecting catheter, with an elastic steering head and a handheld part respectively provided at both ends of the connecting catheter. The steering head contains two symmetrical and elastic airbags, which take on an arc shape after inflation. The steering head contains a placement groove adapted to the airbag. One end of the connecting catheter has a connecting hole communicating with the placement groove. The connecting hole contains an inflation pipe communicating with the airbag. One end of the inflation pipe extends into the handheld part. The handheld part contains an inflation pump for inflating the airbag. The inflation pump is used to inflate and deflate the airbag.

[0008] Preferably, the handheld part is provided with a chemical power source for storing electrical energy and a main controller. The main controller is electrically connected to the chemical power source and the air pump. The handheld part is provided with a control button that is electrically connected to the main controller.

[0009] Preferably, a fixed frame is fixedly installed on the side of the air pump, and a through moving groove is opened at the end of the hand-held part away from the connecting conduit. The moving groove is adapted to two connecting holes, and a matching moving block is slidably connected in the moving groove. A moving column passing through the moving block is fixedly connected to one side of the fixed frame. One end of the moving column extends to the outside and is fixedly connected to a pull plate. A spring sleeved on the side of the moving column is provided between one side of the fixed frame and one side of the moving block. A plug fitting adapted to the air pipe is provided at the end of the air pump away from the moving column.

[0010] Preferably, one end of the insertion tube is fitted onto the end of the inflation pipe, and a sealing ring for sealing is provided inside the insertion tube.

[0011] Preferably, the steering head has two guide bends that communicate with the placement slot, and the guide bends are arc-shaped.

[0012] Preferably, a connecting ring is fixedly connected to one end of the steering head near the connecting conduit, and a connecting step adapted to the connecting ring is provided on the side of the connecting conduit near the steering head.

[0013] Preferably, the end of the insertion tube near the inflation pipe is provided with a guide bevel.

[0014] To address the shortcomings of existing technologies, this invention provides an adjustable-bend microcatheter, overcoming these deficiencies. The beneficial effects of this invention are as follows:

[0015] 1. In this utility model, an air pump inflates one of the airbags, causing the airbag to expand and take on an arc shape. By controlling the amount of air in the airbag, the turning accuracy of the steering head can be improved.

[0016] 2. In this utility model, the movable block can slide in the movable groove, which can adjust the position of the air pump, so that one air pump can inflate either of the two airbags. The airbag can be selected for inflation according to the actual situation, thus improving the applicability of the overall device.

[0017] 3. In this utility model, the airbag can be guided and bent by setting a guide groove, and the steering head and connecting tube can be easily connected and assembled by setting a connecting step and a connecting ring.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the handheld part in this utility model;

[0023] Figure 4 This is a structural schematic diagram of the hand-held part from another perspective in this utility model;

[0024] Figure 5 This is a cross-sectional structural diagram of the steering head in this utility model;

[0025] Figure 6 for Figure 4 Enlarged structural diagram at point A in the middle;

[0026] Figure 7 for Figure 4 Enlarged structural diagram at point B;

[0027] Figure 8 for Figure 4 Enlarged structural diagram at point C.

[0028] In the diagram: 1. Connecting conduit; 2. Steering head; 3. Handheld part; 4. Airbag; 5. Placement slot; 6. Connecting hole; 7. Inflation pipe; 8. Inflation pump; 9. Fixing frame; 10. Moving slot; 11. Moving block; 12. Moving column; 13. Pull plate; 14. Spring; 15. Insert pipe; 16. Sealing ring; 17. Guide bend; 18. Control button; 19. Chemical power source; 20. Main controller; 21. Connecting ring; 22. Connecting step; 23. Guide bevel. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-8 An adjustable bendable microcatheter includes a flexible connecting conduit 1. The connecting conduit 1 has a flexible steering head 2 and a handheld part 3 at both ends. The steering head 2 contains two symmetrical and flexible airbags 4, which inflate to an arc shape. The steering head 2 has a placement groove 5 adapted to the airbags 4. One end of the connecting conduit 1 has a connecting hole 6 communicating with the placement groove 5. The connecting hole 6 contains an inflation pipe 7 communicating with the airbags 4. One end of the inflation pipe 7 extends into the handheld part 3. The handheld part 3 contains an inflation pump 8 for inflating the airbags 4. The inflation pump 8 inflates and deflates the airbags 4. The handheld part 3 also contains a chemical power source 19 for storing electrical energy and a main controller 20. The main controller 20 is electrically connected to the chemical power source 19 and the inflation pump 8. The handheld part 3 has a control button 18 electrically connected to the main controller 20 on its exterior.

[0031] Specifically, the wall thickness of the two airbags 4 near the center of the steering head 2 is thinner than that of the side wall further away from the center of the steering head 2. A rigid support structure can also be embedded in the thicker side of the airbag 4. One end of the airbag 4 is fixedly installed against the opposite side wall of the placement groove 5 near the inflation pipe 7. When the position of the steering head 2 needs to be adjusted, the inflation pump 8 is started via the control button 18. After the inflation pump 8 starts, it inflates one of the airbags 4 through the inflation pipe 7. When the airbag 4 is inflated, it expands and takes on an arc shape. Therefore, the deformable steering head 2 is driven to bend, and the other uninflated one is also deformable, so the steering head 2 can be adjusted. When no adjustment is needed, the gas inside the airbag 4 can be released. With the inflatable airbag 4, which is arc-shaped after inflation, there is no need to use a pull rope to adjust the microcatheter. Furthermore, by controlling the amount of air in the airbag 4, the bending accuracy of the steering head 2 can be improved. The chemical power source 19 can be repeatedly charged to provide power to the air pump 8 and the main controller 20. The main controller 20, together with the control button 18, controls the air pump 8.

[0032] As a technical optimization of this utility model, a fixed frame 9 is fixedly installed on the side of the air pump 8, and a through moving groove 10 is opened at the end of the hand-held part 3 away from the connecting conduit 1. The moving groove 10 is adapted to two connecting holes 6. A matching moving block 11 is slidably connected in the moving groove 10. A moving column 12 that passes through the moving block 11 is fixedly connected to one side of the fixed frame 9. One end of the moving column 12 extends to the outside and is fixedly connected to a pull plate 13. A spring 14 is provided between one side of the fixed frame 9 and one side of the moving block 11 and sleeved on the side of the moving column 12. A plug tube 15 adapted to the air pipe 7 is provided at the end of the air pump 8 away from the moving column 12. One end of the plug tube 15 is sleeved on the end of the air pipe 7. A sealing ring 16 for sealing is provided in the plug tube 15. A guide bevel 23 is opened at the end of the plug tube 15 near the air pipe 7.

[0033] Specifically, when one of the airbags 4 needs to be inflated, the pull plate 13 is pulled away from the handheld part 3. The pull plate 13 moves the moving column 12, which in turn moves the fixed frame 9. The fixed frame 9 moves the air pump 8, which in turn moves the insertion tube 15. At this time, the spring 14 is compressed, pushing the moving block 11 to move within the moving groove 10. The moving block 11 is moved to one end of the moving groove 10, at which point the insertion tube 15 is aligned with one end of the inflation pipe 7. The pull plate 13 is then released, and the tension of the spring 14 pushes... The fixed frame 9 moves toward the inflation pipe 7. The guide bevel 23 facilitates the guidance of the insertion pipe 15. One end of the insertion pipe 15 is fitted onto one end of the inflation pipe 7, and the sealing ring 16 provides a sealing effect. The insertion pipe 15 is connected to the end of the inflation pipe 7. The corresponding airbag 4 can be inflated by turning on the inflation pump 8. When inflation is not required, the inflation pump 8 can be removed, and the gas in the airbag 4 can be discharged through the inflation pipe 7. The position of the inflation pump 8 can be adjusted to facilitate the inflation of one of the two airbags 4.

[0034] As a technical optimization of this utility model, two guide grooves 17 connected to the placement groove 5 are provided in the steering head 2. The guide grooves 17 are arc-shaped and guide the airbag 4 to improve the bending effect of the airbag 4 after inflation.

[0035] As a technical optimization of this utility model, a connecting ring 21 is fixedly connected to one end of the steering head 2 near the connecting conduit 1. A connecting step 22 adapted to the connecting ring 21 is provided on the side of the connecting conduit 1 near the steering head 2. During installation, the airbag 4 is fixedly installed in the placement groove 5 and connected to the connecting step 22 by the connecting ring 21. After tightening the steering head 2, the placement groove 5 is adapted to the position of the connecting hole 6, and the inflation pipe 7 is inserted into the connecting hole 6. One end of the airbag 4 is connected to the threaded ring of the inflation pipe 7. The inflation pipe 7 is threadedly connected to the threaded ring, which facilitates the assembly of the whole micro-conduit.

[0036] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable bendable microcatheter, comprising a flexible connecting catheter (1), characterized in that, The connecting conduit (1) has a flexible steering head (2) and a handheld part (3) at both ends. The steering head (2) has two symmetrical and flexible airbags (4). The airbags (4) are arc-shaped after being inflated. The steering head (2) has a placement groove (5) that is adapted to the airbags (4). One end of the connecting conduit (1) has a connecting hole (6) that connects to the placement groove (5). The connecting hole (6) has an inflation pipe (7) that connects to the airbags (4). One end of the inflation pipe (7) extends into the handheld part (3). The handheld part (3) has an inflation pump (8) for inflation. The inflation pump (8) is used to inflate and deflate the airbags (4).

2. The adjustable bendable microcatheter according to claim 1, characterized in that, The handheld part (3) is equipped with a chemical power source (19) for storing electrical energy and a main controller (20). The main controller (20) is electrically connected to the chemical power source (19) and the air pump (8). The handheld part (3) is equipped with a control button (18) that is electrically connected to the main controller (20).

3. The adjustable bendable microcatheter according to claim 1, characterized in that, A fixed frame (9) is fixedly installed on the side of the air pump (8). A through moving groove (10) is opened at the end of the hand-held part (3) away from the connecting conduit (1). The moving groove (10) is adapted to two connecting holes (6). A matching moving block (11) is slidably connected in the moving groove (10). A moving column (12) that passes through the moving block (11) is fixedly connected to one side of the fixed frame (9). One end of the moving column (12) extends to the outside and is fixedly connected to a pull plate (13). A spring (14) sleeved on the side of the moving column (12) is provided between one side of the fixed frame (9) and one side of the moving block (11). A plug-in pipe (15) that is adapted to the air pipe (7) is provided at the end of the air pump (8) away from the moving column (12).

4. The adjustable bendable microcatheter according to claim 3, characterized in that, One end of the insertion tube (15) is fitted onto the end of the inflation pipe (7), and a sealing ring (16) for sealing is provided inside the insertion tube (15).

5. The adjustable bendable microcatheter according to claim 1, characterized in that, Two guide grooves (17) are provided inside the steering head (2) and are connected to the placement groove (5). The guide grooves (17) are arc-shaped.

6. The adjustable bendable microcatheter according to claim 1, characterized in that, A connecting ring (21) is fixedly connected to one end of the steering head (2) near the connecting conduit (1), and a connecting step (22) adapted to the connecting ring (21) is provided on the side of the connecting conduit (1) near the steering head (2).

7. The adjustable bendable microcatheter according to claim 3, characterized in that, The insertion pipe (15) has a guide bevel (23) at one end near the inflation pipe (7).

Images