Impact cutting balloon catheter

Abstract

An inner tube of the impact cutting balloon catheter is composed of a first section, a second section, a third section, a fourth section, a fifth section, a sixth section and a seventh section, the first section, the second section, the third section, the fourth section, the fifth section, the sixth section and the seventh section are sequentially connected and communicated and are each of a hollow tubular structure with the two open ends, and the second section and the fourth section specifically share the same rotating center line. The transmission shaft is fixedly connected with the second section and the fourth section, the rotor motor is used for driving the transmission shaft to rotate around the axis of the transmission shaft, and the transmission shaft drives the second section and the fourth section to rotate around the rotation center line when rotating. By means of deflection centrifugal force of the second section and the fourth section of the inner tube and stirring of liquid filled in the balloon, the inner wall of the balloon can be directionally impacted with frequency, then the balloon and the cutting blade are driven to vibrate, the cutting blade directionally impacts hard plaques, and therefore the changed cutting efficiency and the better cutting effect are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an impact cutting balloon catheter. Background Art

[0002] In recent years, the incidence of vascular diseases has been high, which has posed a serious threat to people's health. In vascular interventional treatment, the most common lesion is atherosclerotic plaque, which can cause vascular stenosis or even blockage, seriously affecting blood flow and endangering the patient's life. At present, commonly used treatment methods include drug therapy, balloon dilatation and stent implantation. Among them, drug therapy is not accurate enough and the effect is not good. Stents are foreign bodies, and long-term implantation in blood vessels causes complications such as long-term inflammation, thrombosis, and long-term restenosis. The cutting balloon was developed on the basis of the traditional dilatation balloon, and mainly relies on the expansion force of the balloon to squeeze the blade to achieve plaque cutting. However, for harder plaques, the cutting efficiency of existing cutting balloons is low, and it is difficult to achieve an ideal cutting effect. Therefore, it is of great clinical significance to develop a cutting balloon catheter with stronger cutting performance. Summary of the invention

[0003] The purpose of the present invention is to provide an impact cutting balloon catheter which has a better cutting effect on hard plaques.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The invention provides a cutting catheter, which comprises an outer tube, an inner tube, a balloon, a cutting blade and a driving component.

[0006] Specifically, the inner tube is composed of a first section, a second section, a third section, a fourth section, a fifth section, a sixth section and a seventh section which are connected and communicated in sequence and have a hollow tubular structure with both ends open, the first section is inserted in the outer tube and the distal end thereof extends out of the distal end of the outer tube, the second section and the fourth section are specifically on the same rotation center line, and the rotation center line is parallel to the axis of the second section and the fourth section but does not overlap;

[0007] The balloon has a radial expansion state and a radial contraction state, the proximal end of the balloon is sealed and fixedly connected to the distal end of the outer tube, the distal end of the balloon is sealed and fixedly connected to the seventh section, the axis of the balloon is parallel to the rotation centerline but does not coincide with it, and a balloon filling channel connected to the interior of the balloon and used for conveying liquid into the balloon is formed between the inner wall of the outer tube and the outer wall of the first section;

[0008] The cutting blade is arranged on the outer surface of the balloon and extends in a direction parallel to the axis thereof, and the cutting blade and the axis of the balloon are respectively located on opposite sides of the rotation centerline;

[0009] The driving assembly includes a transmission shaft fixedly connected to the second section and the fourth section and a rotor motor for driving the transmission shaft to rotate around its own axis, and when the transmission shaft rotates, the second section and the fourth section are driven to rotate around the rotation center line.

[0010] When the balloon is in the radial expansion state, the transmission shaft is driven to rotate by the rotor motor, thereby driving the second section and the fourth section to rotate, so that the balloon and the cutting blade vibrate.

[0011] In an embodiment of the present invention, when the second section and the fourth section rotate, the deflected centrifugal force of the second section and the fourth section and the stirring of the liquid filled in the balloon cause the cutting blade to have a frequency and directional impact on the inner wall of the balloon, thereby driving the balloon and the cutting blade to vibrate. The cutting blade directional impacts the hard plaque, and the transmission speed can be controlled by the rotor motor, thereby controlling the rotation speed of the second section and the fourth section, providing a suitable impact force and shock frequency, thereby achieving a changed cutting efficiency and a better cutting effect.

[0012] A rotor motor is used in the embodiment of the present invention. The rotor driving the transmission shaft to rotate and the energized stator in the rotor motor are in a physically isolated state and are driven by magnetic force. Therefore, the rotor can work in the case of overflowing liquid to ensure the cutting effect.

[0013] In an embodiment of the present invention, a transmission shaft support ring is fixedly mounted on the first section, the third section and the fifth section respectively, a first transmission shaft channel is opened on the transmission shaft support ring, a second transmission shaft channel extending along the rotation center line is opened on the side wall of the second section and the fourth section, the rotor motor is arranged outside the proximal end of the outer tube, and the rotating shaft is rotatably arranged around its own axis and penetrates through the balloon filling channel and the first transmission shaft channel, and is relatively fixedly arranged in the second transmission shaft channel.

[0014] Further, the inner diameters of the first section, the third section, and the fifth section are equal, the outer diameters of the first section, the third section, and the fifth section are equal, the outer diameters of the second section and the fourth section are larger than the first section, the second section and the fourth section are respectively provided with a guide wire channel and the second transmission shaft channel, the guide wire channel is coaxial with the first section and has the same inner diameter, and the axis of the guide wire channel does not coincide with the axis of the second section and the fourth section.

[0015] Furthermore, the transmission shaft support ring, the second section and the fourth section are made of metal or alloy, and the first section, the third section, the fifth section and the seventh section are made of polymer material.

[0016] In some specific embodiments of the present invention, the transmission shaft support ring, the second section and the fourth section are made of platinum alloy, which can be visualized under X-rays to enhance surgical visualization.

[0017] In some other embodiments of the present invention, the transmission shaft support ring and the second section and the fourth section are provided with a developing coating to enhance the surgical visualization effect.

[0018] Furthermore, the balloon consists of a first part with an inner diameter gradually increasing from the proximal end to the distal end, a second part connected to the distal end of the first part with a constant inner diameter, and a third part connected to the distal end of the second part with an inner diameter gradually decreasing from the proximal end to the distal end. The distal inner diameter of the first part, the inner diameter of the second part and the proximal inner diameter of the third part are equal. The cutting blade extends from the proximal end of the second part to its distal end. The proximal end of the second section is roughly aligned with the proximal end of the second section, and the distal end of the fourth section is roughly aligned with the distal end of the second section. The ratio of the lengths of the second section, the third section and the fourth section is 1:(3-5):(0.95-1.05).

[0019] Furthermore, the sixth section is composed of a rubber hose and a connecting bracket sleeved on the rubber hose, the proximal end of the connecting bracket and the proximal end of the rubber hose are respectively fixedly connected to the distal end of the fifth section, the distal end of the connecting bracket and the distal end of the rubber hose are respectively fixedly connected to the proximal end of the sixth section, the connecting bracket is woven from multiple metal wires, and the connecting bracket has a hollow structure.

[0020] In the embodiment of the present invention, the rubber hose is relatively thin and is connected between the fifth section and the seventh section by welding. The rubber hose is heat-treated to form an inward-concave shape, which will be concave when only subjected to the pressure of the liquid in the balloon, thereby achieving a closed pipeline and sealing the distal end of the inner tube. The connecting bracket is connected between the fifth section and the seventh section by welding to provide support strength for the inner tube section between the fifth section and the seventh section, and the hollow holes on the bracket facilitate the liquid in the balloon to squeeze the rubber hose inward.

[0021] In an embodiment of the present invention, the impact cutting balloon catheter also includes a catheter seat fixedly arranged at the proximal ends of the inner tube and the outer tube, the catheter seat being provided with a first channel having a first entrance and exit connected to the proximal end of the inner tube, a second channel having a second entrance and exit connected to the balloon filling channel, and a third channel connected to the balloon filling channel for the transmission shaft to pass through, and the rotor motor is detachably mounted at the proximal end of the third channel.

[0022] Furthermore, a hemostatic valve is detachably connected to the distal end of the first channel.

[0023] In order to prevent the balloon filling liquid from flowing back from the inner tube to the guide wire entrance, a hemostatic valve is installed at the guide wire entrance of the first channel, and the hemostatic valve can be used to clamp the guide wire to achieve proximal blockage. Specifically, in some embodiments, the hemostatic valve used is a Y-type hemostatic valve conventionally used in the art, and the hemostatic valve is installed on the catheter seat through a Luer connector. When the balloon is pressurized, the hemostatic valve can be locked by manually twisting, and the internal soft rubber is squeezed to cause blockage to prevent leakage of the filling liquid.

[0024] In an embodiment of the present invention, the third channel is connected to a pressure pump or injection equipment through a standard Luer connector, and the balloon is filled with balloon filling liquid (including developer, saline, etc.) to pressurize and expand the balloon. Before the balloon is depressurized or the product is removed, negative pressure is drawn through this hole to draw out the liquid in the balloon and catheter.

[0025] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0026] The impact cutting balloon catheter of the present invention can use the deflection centrifugal force of the second section and the fourth section of the inner tube and the stirring of the liquid filled in the balloon to have a frequency-directed impact on the inner wall of the balloon, thereby driving the balloon and the cutting blade to vibrate. The cutting blade can directionally impact the hard plaque. The rotation speed of the transmission shaft can be controlled by the rotor motor, thereby controlling the rotation speed of the second section and the fourth section, providing appropriate impact force and shock frequency, thereby achieving a changed cutting efficiency and a better cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] It should be noted that in order to fully display the structure in the drawings, the proportional relationship in the drawings has been adaptively adjusted, but it does not represent the proportional relationship of the structures of the various parts in actual use, or use the proportional relationship in the drawings as a factor to limit the scope of protection of the present invention.

[0029] Figure 1 It is a schematic diagram of the overall structure of the impact cutting balloon catheter of Example 1;

[0030] Figure 2 for Figure 1 perspective drawing;

[0031] Figure 3 It is a partial structural perspective view of the impact cutting balloon catheter of Example 1;

[0032] Figure 4 It is a partial structural cross-sectional view of the impact cutting balloon catheter of Example 1;

[0033] Figure 5 It is a cross-sectional view of the local structural changes of the second section and the fourth section of the impact cutting balloon catheter of Example 1 when they rotate;

[0034] Figure 6 It is a schematic diagram of the local structural changes of the second section and the fourth section of the impact cutting balloon catheter of Example 1 when they rotate;

[0035] Figure 7 for Figure 6 Schematic diagram of the side structure changes;

[0036] Figure 8 It is a schematic diagram of the distal structure of the inner tube of the impact cutting balloon catheter of Example 1 in a use state;

[0037] Fig. 9 is a schematic diagram of the distal end structure of the inner tube of the impact cutting balloon catheter of Example 1 in another use state,

[0038] In the above figure: 1. outer tube, 21. first section; 22. second section; 23. third section; 24. fourth section; 25. fifth section; 26. sixth section; 261. rubber hose; 262. connecting bracket; 27. seventh section; 3. balloon; 31. first part; 32. second part; 33. third part; 4. cutting blade; 51. transmission shaft; 52. rotor motor; 61. first transmission shaft support ring; 62. second transmission shaft support ring; 63. third transmission shaft support ring; 64. fourth transmission shaft support ring; 65. fifth transmission shaft support ring; 7. catheter seat; 71. first channel; 72. second channel; 73. third channel. DETAILED DESCRIPTION

[0039] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0040] In the description of the present invention, it is necessary to understand that the distal end refers to the end of the instrument or component away from the operator, and the proximal end refers to the end of the instrument or component close to the operator; the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the instrument or component, and the radial direction refers to the direction perpendicular to the axial direction; the inner and outer are positions defined by the distance relative to the center of the instrument or component, wherein the inner is a position close to the center of the instrument or component, and the outer is a position far from the center of the instrument or component. The description of the above-mentioned directional words is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0042] In the description of the present invention, a plurality refers to two or more.

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Example 1

[0045] This embodiment is a preferred implementation of the impact cutting balloon catheter of the present invention. Figures 1 to 9 As shown, the impact cutting balloon catheter of this embodiment includes an outer tube 1, an inner tube, a balloon 3, a cutting blade 4, a driving assembly and a catheter seat 7.

[0046] Specifically, the outer tube 1 is a hollow tubular structure with both ends open.

[0047] Specifically, the inner tube is composed of a first section 21, a second section 22, a third section 23, a fourth section 24, a fifth section 25, a sixth section 26 and a seventh section 27 which are connected and communicated in sequence and have a hollow tubular structure with both ends open. The first section 21 is inserted in the outer tube 1 and the distal end extends out of the distal end of the outer tube 1. The second section 22 and the fourth section 24 are specifically on the same rotation center line, and the rotation center line is parallel to but not coincident with the axis of the second section 22 and the fourth section 24. In this embodiment, the inner diameters of the first section 21, the third section 23 and the fifth section 25 are equal, the outer diameters of the first section 21, the third section 23 and the fifth section 25 are equal, the outer diameters of the second section 22 and the fourth section 24 are greater than the first section 21, and the second section 22 and the fourth section 24 are respectively provided with a guide wire channel, which is coaxial with the first section 21 and has the same inner diameter, and the axis of the guide wire channel does not coincide with the axis of the second section 22 and the fourth section 24. The material of the transmission shaft support ring, the second section 22 and the fourth section 24 is a platinum alloy that can be developed under X-rays, and the material of the first section 21, the third section 23, the fifth section 25 and the seventh section 27 is a polymer material. The sixth section 26 is composed of a rubber hose 261 and a connecting bracket 262 sleeved on the rubber hose 261, the proximal end of the connecting bracket 262 and the proximal end of the rubber hose 261 are respectively fixedly connected to the distal end of the fifth section 25, the distal end of the connecting bracket 262 and the distal end of the rubber hose 261 are respectively fixedly connected to the proximal end of the sixth section 26, and the connecting bracket 262 is woven from a plurality of metal wires and has a hollow structure.

[0048] Specifically, the balloon 3 has a radial expansion state and a radial contraction state. The proximal end of the balloon 3 is sealed and fixedly connected to the distal end of the outer tube 1, and the distal end of the balloon 3 is sealed and fixedly connected to the seventh section 27. The axis of the balloon 3 is parallel to the rotation centerline but does not coincide with the rotation centerline. A balloon filling channel is formed between the inner wall of the outer tube 1 and the outer wall of the first section 21, which is connected to the interior of the balloon 3 and is used to transport liquid into the balloon 3. In this embodiment, the balloon 3 consists of a first part whose inner diameter gradually increases from the proximal end to the distal end, a second part 32 whose inner diameter remains unchanged and is connected to the distal end of the first part 31, and a third part 33 whose inner diameter gradually decreases from the proximal end to the distal end and is connected to the distal end of the second part 32. The distal inner diameter of the first part 31, the inner diameter of the second part 32 and the proximal inner diameter of the third part 33 are equal, the cutting blade 4 extends from the proximal end of the second part 32 to its distal end, the proximal end of the second section 22 is roughly aligned with the proximal end of the second section 32, the distal end of the fourth section 24 is roughly aligned with the distal end of the second section 32, and the length ratio of the second section 22, the third section 23 and the fourth section 24 is 1:3.5:1.

[0049] Specifically, the cutting blade 4 is arranged on the outer surface of the balloon 3 and extends in a direction parallel to the axis thereof, and the cutting blade 4 and the axis of the balloon 3 are respectively located on opposite sides of the rotation center line. In this embodiment, the cross section of the cutting blade 4 is triangular.

[0050] Specifically, the driving assembly includes a transmission shaft 51 fixedly connected to the second section 22 and the fourth section 24 and a rotor motor 52 for driving the transmission shaft 51 to rotate around its own axis. When the transmission shaft 51 rotates, it drives the second section 22 and the fourth section 24 to rotate around the rotation center line. When the balloon 3 is in a radially expanded state, the transmission shaft 51 is driven to rotate by the rotor motor 52, thereby driving the second section 22 and the fourth section 24 to rotate, causing the balloon 3 and the cutting blade 4 to vibrate. In this embodiment, a first transmission shaft support ring 61, a second transmission shaft support ring 62, a third transmission shaft support ring 63, a fourth transmission shaft support ring 64 and a fifth transmission shaft support ring 65 are fixedly sleeved on the first section 21, the third section 23 and the fifth section 25, and a first transmission shaft channel is respectively opened on each transmission shaft support ring, and a second transmission shaft channel extending along the rotation center line is opened on the side walls of the second section 22 and the fourth section 24, and the rotor motor 52 is arranged on the proximal outside of the outer tube 1, and the rotating shaft can be rotatably arranged around its own axis and passed through the balloon filling channel and the first transmission shaft channel, and is relatively fixedly arranged in the second transmission shaft channel.

[0051] Specifically, the catheter seat 7 is fixedly arranged at the proximal ends of the inner tube and the outer tube 1. The catheter seat 7 has a first channel 71 connected to the proximal end of the inner tube and provided with a first inlet and outlet, a second channel 72 connected to the balloon filling channel and provided with a second inlet and outlet, and a third channel 73 connected to the balloon filling channel for the transmission shaft 51 to pass through, and the rotor motor 52 is detachably mounted at the proximal end of the third channel 73. In this embodiment, the distal end of the first channel 71 is connected to a hemostatic valve through a Luer connector.

[0052] In this embodiment, when the balloon 3 is in a radially expanded state, the transmission shaft 51 is driven by the rotor motor 52 to rotate, driving the second section 22 and the fourth section 24 to rotate. The deflection centrifugal force of the second section 22 and the fourth section 24 and the stirring of the liquid filled in the balloon 3 cause the cutting blade 4 to have a frequency and directional impact on the inner wall of the balloon 3, thereby driving the balloon 3 and the cutting blade 4 to vibrate. The cutting blade 4 directional impacts the hard plaque. The transmission speed can be controlled by the rotor motor 52, thereby controlling the rotation speed of the second section 22 and the fourth section 24, providing a suitable impact force and shock frequency, thereby achieving a changed cutting efficiency and a better cutting effect.

[0053] The method of using the impact cutting balloon catheter of this embodiment:

[0054] (1) Before use, the second section 22 and the fourth section 24 are rotated until the guide wire channel is coaxial with the first section 21, the third section 23, the fifth section 25, the sixth section 26 and the seventh section 27;

[0055] (2) The guide wire is passed through the first section 21, the second section 22, the third section 23, the fourth section 24, the fifth section 25, the sixth section 26 and the seventh section 27 in sequence through the first channel 71, and the impact cutting balloon catheter is guided to the balloon 3 to reach the lesion site through the guide wire;

[0056] (3) delivering the liquid into the balloon 3 through the second channel 72 and the balloon filling channel to cause the balloon 3 to expand radially;

[0057] (4) withdrawing the guide wire to the first section 21, and driving the transmission shaft 51 to rotate by the rotor motor 52 to drive the second section 22 and the fourth section 24 to rotate;

[0058] (5) After the cutting is completed, the second section 22 and the fourth section 24 are rotated until the guide wire channel is coaxial with the first section 21, the third section 23, the fifth section 25, the sixth section 26 and the seventh section 27, and the distal end of the guide wire is pushed to the seventh section 27;

[0059] (6) The liquid in the impact cutting balloon catheter is sucked out through the second channel 72 and the filling channel of the balloon 3, and the balloon is radially contracted;

[0060] (7) withdrawing the impact cutting balloon catheter along the guide wire;

[0061] (8) Withdraw the guidewire.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An impact cutting balloon catheter, characterized in that: The impact cutting balloon catheter comprises: External pipe; An inner tube, the inner tube is composed of a first section, a second section, a third section, a fourth section, a fifth section, a sixth section and a seventh section which are connected and communicated in sequence and have a hollow tubular structure with both ends open, the first section is inserted in the outer tube and the distal end thereof extends out of the distal end of the outer tube, the second section and the fourth section are specifically on the same rotation center line, and the rotation center line is parallel to the axis of the second section and the fourth section but does not overlap; A balloon having a radial expansion state and a radial contraction state, wherein the proximal end of the balloon is sealed and fixedly connected to the distal end of the outer tube, and the distal end of the balloon is sealed and fixedly connected to the seventh segment, the axis of the balloon is parallel to the rotation centerline but does not coincide with it, and a balloon filling channel for conveying liquid into the balloon is formed between the inner wall of the outer tube and the outer wall of the first segment and is connected to the interior of the balloon; a cutting blade, which is arranged on the outer surface of the balloon and extends in a direction parallel to the axis thereof, wherein the cutting blade and the axis of the balloon are respectively located on opposite sides of the rotation centerline; A driving assembly includes a transmission shaft fixedly connected to the second section and the fourth section and a rotor motor for driving the transmission shaft to rotate around its own axis, wherein when the transmission shaft rotates, the second section and the fourth section are driven to rotate around the rotation center line. When the balloon is in the radial expansion state, the transmission shaft is driven to rotate by the rotor motor, thereby driving the second section and the fourth section to rotate, so that the balloon and the cutting blade vibrate.

2. The impact cutting balloon catheter according to claim 1, characterized in that: The first section, the third section and the fifth section are respectively fixedly provided with transmission shaft support rings, the transmission shaft support rings are provided with a first transmission shaft channel, the side walls of the second section and the fourth section are provided with a second transmission shaft channel extending along the rotation center line, the rotor motor is arranged outside the proximal end of the outer tube, the rotating shaft is rotatably arranged around its own axis and is inserted into the balloon filling channel and the first transmission shaft channel, and is relatively fixedly inserted into the second transmission shaft channel.

3. The impact cutting balloon catheter according to claim 2, characterized in that: The inner diameters of the first section, the third section, and the fifth section are equal, the outer diameters of the first section, the third section, and the fifth section are equal, the outer diameters of the second section and the fourth section are larger than the first section, the second section and the fourth section are respectively provided with a guide wire channel and the second transmission shaft channel, the guide wire channel is coaxial with the first section and has the same inner diameter, and the axis of the guide wire channel does not coincide with the axis of the second section and the fourth section.

4. The impact cutting balloon catheter according to claim 2, characterized in that: The transmission shaft support ring, the second section and the fourth section are made of metal or alloy, and the first section, the third section, the fifth section and the seventh section are made of polymer material.

5. The impact cutting balloon catheter according to claim 4, characterized in that: The transmission shaft support ring and the second section and the fourth section are provided with a developing coating.

6. The impact cutting balloon catheter according to claim 2, characterized in that: The balloon comprises a first part with an inner diameter gradually increasing from the proximal end to the distal end, a second part connected to the distal end of the first part with a constant inner diameter, and a third part connected to the distal end of the second part with an inner diameter gradually decreasing from the proximal end to the distal end. The distal inner diameter of the first part, the inner diameter of the second part and the proximal inner diameter of the third part are equal. The cutting blade extends from the proximal end of the second part to its distal end. The proximal end of the second section is roughly aligned with the proximal end of the second section. The distal end of the fourth section is roughly aligned with the distal end of the second section. The ratio of the lengths of the second section, the third section and the fourth section is 1:(3-5):(0.95-1.05).

7. The impact cutting balloon catheter according to claim 1, characterized in that: The sixth section is composed of a rubber hose and a connecting bracket sleeved on the rubber hose, the proximal end of the connecting bracket and the proximal end of the rubber hose are respectively fixedly connected to the distal end of the fifth section, the distal end of the connecting bracket and the distal end of the rubber hose are respectively fixedly connected to the proximal end of the sixth section, the connecting bracket is woven from multiple metal wires, and the connecting bracket has a hollow structure.

8. The impact cutting balloon catheter according to claim 1, characterized in that: The impact cutting balloon catheter also includes a catheter seat fixedly arranged at the proximal ends of the inner tube and the outer tube, the catheter seat is provided with a first channel with a first entrance and exit connected to the proximal end of the inner tube, a second channel with a second entrance and exit connected to the balloon filling channel, and a third channel connected to the balloon filling channel for the transmission shaft to pass through, and the rotor motor is detachably mounted at the proximal end of the third channel.

9. The impact cutting balloon catheter according to claim 1, characterized in that: The distal end of the first channel is detachably connected with a hemostatic valve.

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