Micro catheter with deflection regulation and control function for minimally invasive blood vessel

Abstract

The utility model discloses a micro catheter with a deflection regulation and control function for a minimally invasive blood vessel, which relates to the technical field of medical instruments, comprises a catheter body made of high-elasticity materials, and is characterized in that the wall thickness of the catheter body is asymmetrical, namely one side wall is thicker, and the other side wall is thinner; the pipeline is arranged in the pipe body and is used for allowing the micro guide wire to pass through; according to the utility model, the deflection control device is arranged, so that the front end of the micro-catheter is accurately controlled and guided, the device utilizes the wall thickness micro-catheter with the asymmetrical catheter body to generate asymmetrical pressure through fluid injection under the driving of the injector, and the deflection of the micro-catheter can be realized. According to the design, the accuracy and the safety of an operation are improved, the position and the direction of the micro-catheter can be flexibly adjusted according to the requirement of the operation, and the operation of a doctor in the minimally invasive vascular operation is greatly facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a microcatheter with a deflection control function for minimally invasive blood vessels. Background Art

[0002] Microcatheters have a very small diameter and lumen, typically with an outer diameter of 1 mm or less and an inner diameter of 0.8 mm or less. The microcatheter body, especially the distal end, is soft and lacks guidance or torque control. Its tip is primarily guided over a guidewire. Microcatheters used in intracerebral vascular procedures are typically even smaller and more flexible. Currently, commercially available microcatheters lack steering capabilities at the distal end.

[0003] The existing technology lacks a front-end steering function. When a microcatheter enters a small, tortuous brain vessel, its soft front end makes it difficult to guide it into branch vessels or into the aneurysm cavity, which is radially at a near right angle to the parent vessel. This makes subsequent coil placement impossible.

[0004] Therefore, based on the above search and in combination with the existing technology, a microcatheter with deflection control function for minimally invasive blood vessels is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a microcatheter with a deflection control function for minimally invasive blood vessels, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A microcatheter with a deflection control function for minimally invasive blood vessels includes: a tube body, which is made of a highly elastic material and is characterized by an asymmetric wall thickness of the tube body, that is, one side wall is thicker and the other side wall is thinner; a pipeline, which is arranged inside the tube body and is used for the passage of a microguidewire; and a deflection control device, which is arranged on the tube body and is used to deflect the tube body.

[0008] Preferably, the deflection control device includes: a microtube with asymmetric wall thickness, the microtube with asymmetric wall thickness is arranged on the bottom surface of the pipe, a syringe is provided on one side of the tube body, and the syringe is connected to the microtube with asymmetric wall thickness through a connector.

[0009] Preferably, the connecting part includes: a connecting rod, which is arranged on one side of the asymmetric wall thickness microtube of the tube body, an injection channel is opened on one side of the asymmetric wall thickness microtube of the tube body, the injection channel is connected to the surface connected to the connecting rod, and a connector is fixedly installed on the side of the connecting rod away from the injection channel.

[0010] Preferably, a high-pressure sealing gasket is fixedly installed at the connection between the connecting rod and the injection channel, and the high-pressure sealing gasket ensures that no leakage occurs during high-pressure injection.

[0011] Preferably, an injection needle is fixedly mounted on the side of the syringe facing the connector, an injection port is provided on the side of the connector facing the syringe, and the injection needle and the injection port cooperate with each other.

[0012] Preferably, a flow controller is fixedly mounted on the top surface of the syringe, and the flow controller is used to adjust the injection speed and flow rate to ensure stable deflection of the tube body.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The deflection control device achieves precise control and guidance of the microcatheter's front end. This device utilizes the asymmetric wall thickness of the microcatheter. Driven by the syringe, the asymmetric pressure generated by fluid injection causes the microcatheter to deflect, thereby driving the deflection of the entire tube. This design not only improves surgical accuracy and safety, but also allows the position and direction of the microcatheter to be flexibly adjusted according to surgical needs, greatly facilitating the doctor's operation during minimally invasive vascular surgery. In addition, the addition of a flow controller allows the doctor to precisely control the injection speed and flow rate, improving the accuracy and stability of deflection control.

[0015] 2. The stability and durability of the microcatheter are ensured by the use of highly elastic silicone material and rheological fusion technology. The highly elastic silicone material has good elasticity and biocompatibility, which can ensure the smooth movement of the microcatheter in the blood vessel and reduce damage to the blood vessel wall. The application of rheological fusion technology enables the deflection control device to be tightly integrated with the other parts of the microcatheter, forming an integrated whole. This not only improves the overall performance of the microcatheter, but also avoids problems such as falling off or loosening that may occur during surgery. In addition, the design of the middle-layer braided mesh tube and the outer-layer resin tube enhances the pressure resistance and wear resistance of the microcatheter, thereby increasing its service life in complex vascular environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the tube body of the utility model in a pressurized bending state;

[0019] Figure 4 For this utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0020] In the figure: 1. Tube body; 2. Pipe; 3. Injection channel; 4. Connecting rod; 5. High-pressure sealing gasket; 6. Connector; 7. Syringe; 8. Injection needle; 9. Injection port; 10. Flow controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In a typical implementation of this application, please refer to Figures 1 to 4 As shown, a microcatheter for minimally invasive vascular treatment with a deflection control function includes: a tube body 1, which is made of a highly elastic material and is characterized by an asymmetric wall thickness of the tube body 1, i.e., a thicker wall on one side and a thinner wall on the other side. The asymmetric wall thickness of the tube body 1 is made of highly elastic silicone and is formed by coating a core rod and then pulling out the core rod after baking and drying. The microcatheter has an inner diameter of 60 microns, a wall thickness of 5 microns on one side and 20 microns on the other side, and a length of 15 millimeters.

[0023] a pipe 2, which is disposed inside the tubular body 1 and is used for the passage of a microguidewire;

[0024] injection channel 3, deflection control device, the deflection control device is arranged on the tube body 1 and is used to deflect the tube body 1;

[0025] As a preferred implementation in this embodiment, please refer to Figures 1 to 4 As shown, the deflection control device includes: a microtube with an asymmetric wall thickness of the tube body 1, the microtube with an asymmetric wall thickness of the tube body 1 is arranged on the bottom surface of the pipe 2, a syringe 7 is provided on one side of the tube body 1, and the syringe 7 is connected to the microtube with an asymmetric wall thickness of the tube body 1 through a connector. The connector is made of polyimide material, and its inner diameter facing the tube body 1 matches the injection channel 3 on the side of the microtube with an asymmetric wall thickness of the tube body 1. The connector includes: a connecting rod 4, the connecting rod 4 is provided on one side of the microtube with an asymmetric wall thickness of the tube body 1, and the injection channel 3 is opened on one side of the microtube with an asymmetric wall thickness of the tube body 1. The injection channel 3 is connected to the surface connected to the connecting rod 4, and a connector 6 is fixedly installed on the side of the connecting rod 4 away from the injection channel 3;

[0026] The above features enable deflection of the tube body 1. Specifically, one end of the asymmetric wall thickness microtube of the tube body 1 is closed, and the other end is connected to a connector, which is in turn connected to an injection needle 8 of a syringe 7. When pressure is applied to the syringe 7, causing fluid to enter the asymmetric wall thickness microtube of the tube body 1 through the injection needle 8, the asymmetry of the microtube wall causes the two sides of the tube wall to expand to different degrees, thereby causing the tube body 1 to deflect toward the thicker side.

[0027] As a preferred implementation in this embodiment, please refer to Figures 1 to 4 As shown, a high-pressure sealing gasket 5 is fixedly installed at the connection between the connecting rod 4 and the injection channel 3. The high-pressure sealing gasket 5 ensures that no leakage occurs during high-pressure injection. An injection needle 8 is fixedly installed on the side of the syringe 7 facing the connector 6. An injection port 9 is opened on the side of the connector 6 facing the syringe 7. The injection needle 8 and the injection port 9 cooperate with each other. A flow controller 10 is fixedly installed on the top surface of the syringe 7. The flow controller 10 is used to adjust the injection speed and flow rate to ensure stable deflection of the tube body 1;

[0028] It is worth mentioning that the other parts of the microcatheter, including the inner layer, middle layer and outer layer, are all made according to conventional technology, among which the middle layer is a braided mesh tube and the outer layer is a resin tube. The deflection control device is attached between the inner layer and the middle layer and is integrated with them through rheological fusion technology. The above-mentioned working principle and characteristics are existing mature technical means and will not be described in this utility model.

[0029] Working principle:

[0030] During use, the microcatheter is first introduced into the patient's blood vessel through a conduit 2. A microguidewire is then passed through conduit 2 to guide the microcatheter's direction within the vessel. If the microcatheter's direction or position needs to be changed, the syringe 7 can be adjusted to allow fluid to enter the asymmetrically thick microcatheter body 1 through the injection needle 8. Due to the asymmetric wall thickness of the microcatheter, the two sides of the tube wall will expand to varying degrees, causing the tube body 1 to deflect toward the thicker side. By adjusting the flow controller 10, the injection speed and flow rate can be controlled, thereby achieving precise regulation of the degree of deflection of the tube body 1. The high-pressure sealing gasket 5 ensures that no leakage occurs during high-pressure injection, ensuring the safety and stability of the procedure. Furthermore, the remaining components of the microcatheter, including the inner, middle, and outer layers, are manufactured using conventional techniques. The middle layer is a braided mesh tube, and the outer layer is a resin tube. The deflection control device is attached between the inner and middle layers and integrated with them using rheological fusion technology. This structural design ensures the stability and durability of the microcatheter while also improving its guidance and delivery efficiency within the blood vessel.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microcatheter with deflection control function for minimally invasive vascular treatment, characterized by: include: The tube body (1) is made of a highly elastic material and is characterized in that the wall thickness of the tube body (1) is asymmetric, that is, one side wall is thicker and the other side wall is thinner; a pipe (2), the pipe (2) being arranged inside the tubular body (1) and being used for the passage of the micro-guidewire; A deflection control device is provided on the tube body (1) and is used to deflect the tube body (1).

2. The microcatheter with deflection control function for minimally invasive vascular use according to claim 1, characterized in that: The deflection control device includes: The tube body (1) has an asymmetric wall thickness microtube, and the asymmetric wall thickness microtube of the tube body (1) is arranged on the bottom surface of the pipeline (2). A syringe (7) is provided on one side of the tube body (1), and the syringe (7) is connected to the asymmetric wall thickness microtube of the tube body (1) through a connecting piece.

3. The microcatheter with deflection control function for minimally invasive vascular use according to claim 2, characterized in that: Connectors include: A connecting rod (4) is provided on one side of the asymmetric wall-thickness microtube of the tube body (1); an injection channel (3) is provided on one side of the asymmetric wall-thickness microtube of the tube body (1); the injection channel (3) is connected to the surface connected to the connecting rod (4); and a connector (6) is fixedly installed on the side of the connecting rod (4) away from the injection channel (3).

4. The microcatheter with deflection control function for minimally invasive vascular treatment according to claim 3, characterized in that: A high-pressure sealing gasket (5) is fixedly installed at the connection point between the connecting rod (4) and the injection channel (3), and the high-pressure sealing gasket (5) ensures that no leakage occurs during high-pressure injection.

5. The microcatheter with deflection control function for minimally invasive vascular use according to claim 2 or 3, characterized in that: An injection needle (8) is fixedly mounted on the side of the syringe (7) facing the connector (6), and an injection port (9) is provided on the side of the connector (6) facing the syringe (7), and the injection needle (8) and the injection port (9) cooperate with each other.

6. The microcatheter with deflection control function for minimally invasive vascular treatment according to claim 2, characterized in that: A flow controller (10) is fixedly mounted on the top surface of the syringe (7), and the flow controller (10) is used to adjust the injection speed and flow rate to ensure stable deflection of the tube body (1).

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