Impingement cutting balloon catheter

Abstract

The present application relates to a kind of impact cutting balloon catheter, and the inner tube is made of first segment, second segment, third segment, fourth segment, fifth segment, sixth segment and seventh segment with two ends open hollow tubular structure in turn connection and communication, second segment and fourth segment are specifically same rotation center line, rotation center line is parallel with the axis of second segment and fourth segment but not coincident, it further includes transmission shaft fixedly connected with second segment and fourth segment and rotor motor for driving transmission shaft rotation around its axis, transmission shaft rotation drives second segment and fourth segment rotation around rotation center line, the present application can be deflected by the centrifugal force of second segment and fourth segment of inner tube and the agitation of liquid filled in balloon, with frequency directional impact the inner wall of balloon, in turn drive balloon and cutting blade vibration, cutting blade directional impact hard plaque, so as to reach the cutting efficiency of more change and better cutting effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to an impact cutting balloon catheter. BACKGROUND

[0002] In recent years, the incidence of vascular diseases is high, which has seriously threatened people's health. In vascular intervention treatment, the most common lesion is atherosclerotic plaque, which can cause vascular stenosis or even occlusion, seriously affecting blood flow and endangering patients' lives. At present, the commonly used treatment methods include drug therapy, balloon dilation and stent implantation. Drug therapy is not accurate enough and has poor effect. The stent is a foreign body, and long-term implantation in the blood vessel causes long-term inflammation, thrombosis, long-term restenosis and other complications. The cutting balloon is developed on the basis of the traditional expansion balloon, and mainly relies on the expansion force of the balloon to extrude the blade to achieve plaque cutting. However, for hard plaques, the cutting efficiency of the existing cutting balloon is low, and it is difficult to achieve ideal cutting effect. Therefore, it is of great clinical significance to develop a cutting balloon catheter with stronger cutting performance. SUMMARY

[0003] The purpose of the present application is to provide an impact cutting balloon catheter with better cutting effect on hard plaques.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

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

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

[0007] The balloon has a radial expansion state and a radial contraction state, the proximal end of the balloon is sealingly and fixedly connected with the distal end of the outer tube, the distal end of the balloon is sealingly and fixedly connected with the seventh segment, the axis of the balloon is parallel to but not coincident with the rotation center line, and the inner wall of the outer tube and the outer wall of the first segment form a balloon filling channel for delivering liquid into the balloon, which is in communication with the interior of the balloon;

[0008] The cutting blade is arranged on the outer surface of the balloon and extends in the direction parallel to the axis of the balloon, and the axis of the cutting blade and the balloon is respectively located on the opposite sides of the rotation center line.

[0009] The driving assembly comprises a transmission shaft fixedly connected with the second segment and the fourth segment, and a rotor motor for driving the transmission shaft to rotate around its own axis, the transmission shaft drives the second segment and the fourth segment to rotate around the rotation center line when rotating,

[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 segment and the fourth segment to rotate, so that the balloon and the cutting blade vibrate.

[0011] In the embodiment of the present application, when the second segment and the fourth segment rotate, the deflection centrifugal force of the second segment and the fourth segment and the agitation of the liquid filled in the balloon make the cutting blade have directional impact on the inner wall of the balloon at a certain frequency, thereby driving the balloon and the cutting blade to vibrate, the cutting blade directional impact on the hard plaque, the transmission speed can be controlled by the rotor motor, thereby controlling the rotation speed of the second segment and the fourth segment, providing appropriate impact force and impact frequency, so as to achieve better cutting efficiency and cutting effect.

[0012] In the embodiment of the present application, a rotor motor is used, the rotor and the energized stator for driving the transmission shaft to rotate are in a physical isolation state, and are pushed by magnetic force, so that the rotor can work in the case of overflow of the filled liquid, and the cutting effect is guaranteed.

[0013] In the embodiment of the present application, the first segment, the third segment and the fifth segment are respectively fixedly sleeved with a transmission shaft support ring, a first transmission shaft channel is formed in the transmission shaft support ring, a second transmission shaft channel extending along the rotation center line is formed in the side wall of the second segment and the fourth segment, the rotor motor is arranged outside the proximal end of the outer tube, the rotation shaft is rotatably arranged in the balloon filling channel and the first transmission shaft channel around its own axis, and is relatively fixedly arranged in the second transmission shaft channel.

[0014] Further, the inner diameters of the first segment, the third segment and the fifth segment are equal, the outer diameters of the first segment, the third segment and the fifth segment are equal, the outer diameters of the second segment and the fourth segment are greater than that of the first segment, the second segment and the fourth segment are respectively provided with a guide wire channel and the second transmission shaft channel, the guide wire channel is coaxial with the first segment and has an equal inner diameter, and the axis of the guide wire channel is not coincident with the axes of the second segment and the fourth segment.

[0015] Further, the materials of the transmission shaft support ring, the second segment and the fourth segment are metal or alloy, and the materials of the first segment, the third segment, the fifth segment and the seventh segment are high polymer materials.

[0016] In some embodiments of the present application, the transmission shaft support ring, the second segment and the fourth segment are made of platinum alloy, which can be developed under X-ray, thereby enhancing the visualization effect of the operation.

[0017] In some embodiments of the present application, the transmission shaft support ring, the second segment and the fourth segment are provided with a developing coating, thereby enhancing the visualization effect of the operation.

[0018] Further, the balloon comprises a first part with gradually increasing inner diameter from proximal end to distal end, a second part with constant inner diameter connected to the distal end of the first part, and a third part with gradually decreasing inner diameter from proximal end to distal end connected to the distal end of the second part, the distal end inner diameter of the first part, the inner diameter of the second part and the proximal end inner diameter of the third part are equal, the cutting blade extends along the proximal end of the second part to the distal end thereof, the proximal end of the second segment is substantially aligned with the proximal end of the second part, and the distal end of the fourth segment is substantially aligned with the distal end of the second part, the length ratio of the second segment, the third segment and the fourth segment is 1:(3-5):(0.95-1.05).

[0019] Further, the sixth segment 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 fixedly connected with the distal end of the fifth segment respectively, the distal end of the connecting bracket and the distal end of the rubber hose are fixedly connected with the proximal end of the sixth segment respectively, the connecting bracket is woven by a plurality of metal wires, and the connecting bracket has a hollow structure.

[0020] In the embodiment of the present application, the rubber hose is thin and is connected between the fifth segment and the seventh segment by welding, the rubber hose will form a concave shape by heat treatment, which will be concave when only subjected to the pressure of the liquid in the balloon, thereby achieving the closed pipeline and further sealing the distal end of the inner tube. The connecting bracket connects the fifth segment and the seventh segment by welding, thereby providing support strength for the inner tube segment between the fifth segment and the seventh segment, and the hollow holes on the connecting bracket facilitate the extrusion of the liquid in the balloon to the rubber hose.

[0021] In the embodiment of the present application, the impact cutting balloon catheter further comprises a catheter seat fixedly arranged at the proximal end of the inner tube and the outer tube, the catheter seat is provided with a first channel with a first outlet connected with the proximal end of the inner tube, a second channel with a second outlet connected with the balloon inflation channel, and a third channel for the transmission shaft to pass through and connected with the balloon inflation channel, and the rotor motor is detachably installed at the proximal end of the third channel.

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

[0023] In order to avoid the backflow of the balloon inflation liquid from the inner tube to the guide wire inlet, a hemostatic valve is installed at the guide wire port of the first channel, and the proximal end is blocked by clamping the guide wire of the hemostatic valve. Specifically, in some embodiments, the hemostatic valve used is a Y-shaped hemostatic valve commonly used in the art, which is installed on the catheter seat through a luer joint. When the balloon is inflated, the hemostatic valve can be locked by manually twisting, and the occlusion is caused by the extrusion of the internal soft rubber, thereby preventing the inflation liquid from leaking.

[0024] In the embodiments of the present application, the third channel is connected to a pressure pump or an injection device through a luer standard joint, and the balloon is inflated with balloon inflation liquid (including contrast agent, normal saline, etc.) to pressurize and expand the balloon. Before the balloon is depressurized or the product is removed, negative pressure is applied through the hole to extract the liquid in the balloon and the catheter.

[0025] Thanks to the above technical solutions, the present application has the following advantages compared with the prior art:

[0026] The impact cutting balloon catheter of the present application can have directional impact on the inner wall of the balloon through the deflection of the centrifugal force of the second and fourth segments of the inner tube and the stirring of the liquid filled in the balloon, thereby driving the balloon and the cutting blade to vibrate, and the cutting blade can impact the hard plaque in a directional manner. The rotation speed of the transmission shaft can be controlled by the rotor motor, thereby controlling the rotation speed of the second and fourth segments, providing appropriate impact force and shock frequency, so as to achieve improved cutting efficiency and better cutting effect. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[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 cannot represent the proportional relationship between the structures of each part in the actual use or the proportional relationship in the drawings as a factor limiting the protection scope of the present application.

[0029] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the impact cutting balloon catheter of embodiment 1;

[0030] Figure 2 FIG. 2 is a perspective view of the impact cutting balloon catheter of embodiment 1; Figure 1

[0031] Figure 3 FIG. 3 is a partial structure perspective view of the impact cutting balloon catheter of embodiment 1;

[0032] ​Figure 4 Partial structural section view of the impact cutting balloon catheter of Example 1;

[0033] Figure 5 Partial structural section view of the second and fourth segments of the impact cutting balloon catheter of Example 1 in rotation;

[0034] Figure 6 Partial structural section view of the second and fourth segments of the impact cutting balloon catheter of Example 1 in rotation;

[0035] Figure 7 Partial structural section view of the second and fourth segments of the impact cutting balloon catheter of Example 1 in rotation; Figure 6 Partial structural section view of the second and fourth segments of the impact cutting balloon catheter of Example 1 in rotation;

[0036] Figure 8 Partial structural section view of the second and fourth segments of the impact cutting balloon catheter of Example 1 in rotation;

[0037] Figure 9 Partial structural section view of the second and fourth segments of the impact cutting balloon catheter of Example 1 in rotation,

[0038] In the above figures: 1, outer tube, 21, first segment; 22, second segment; 23, third segment; 24, fourth segment; 25, fifth segment; 26, sixth segment; 261, rubber hose; 262, connecting support; 27, seventh segment; 3, balloon; 31, first portion; 32, second portion; 33, third portion; 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 certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present application. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

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

[0041] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or can be integrated. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] In the description of the present application, multiple refers to two or more.

[0043] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0044] Embodiment 1

[0045] This embodiment is a preferred embodiment of the impact cutting balloon catheter of the present application, as shown in Figures 1 to 9 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 the first segment 21, the second segment 22, the third segment 23, the fourth segment 24, the fifth segment 25, the sixth segment 26 and the seventh segment 27 which are connected in sequence and communicate with each other, the first segment 21 is inserted into the outer tube 1 and extends out of the distal end of the outer tube 1, the second segment 22 and the fourth segment 24 have the same rotation center line, and the rotation center line is parallel to but not coincident with the axis of the second segment 22 and the fourth segment 24. In this embodiment, the inner diameter of the first segment 21, the third segment 23 and the fifth segment 25 is equal, the outer diameter of the first segment 21, the third segment 23 and the fifth segment 25 is equal, the outer diameter of the second segment 22 and the fourth segment 24 is larger than that of the first segment 21, the second segment 22 and the fourth segment 24 are respectively provided with a guide wire channel which is coaxial with the first segment 21 and has the same inner diameter, and the axis of the guide wire channel is not coincident with the axis of the second segment 22 and the fourth segment 24. The material of the transmission shaft support ring, the second segment 22 and the fourth segment 24 is platinum alloy which can be developed under X-ray, and the material of the first segment 21, the third segment 23, the fifth segment 25 and the seventh segment 27 is high polymer material. The sixth segment 26 is composed of a rubber hose 261 and a connecting bracket 262 which is 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 with the distal end of the fifth segment 25, the distal end of the connecting bracket 262 and the distal end of the rubber hose 261 are respectively fixedly connected with the proximal end of the sixth segment 26, the connecting bracket 262 is woven by a plurality of metal wires, and the connecting bracket 262 has a hollow structure.

[0048] Specifically, the balloon 3 has a radially expanded state and a radially contracted state, the proximal end of the balloon 3 is sealingly and fixedly connected with the distal end of the outer tube 1, the distal end of the balloon 3 is sealingly and fixedly connected with the seventh segment 27, the axis of the balloon 3 is parallel to but not coincident with the rotation center line, and the inner wall of the outer tube 1 and the outer wall of the first segment 21 form a balloon inflation channel which communicates with the interior of the balloon 3 and is used for delivering liquid into the balloon 3. In this embodiment, the balloon 3 is composed of a first part 31 with gradually increasing inner diameter from the proximal end to the distal end, a second part 32 connected with the distal end of the first part 31 and having constant inner diameter, and a third part 33 connected with the distal end of the second part 32 and having gradually decreasing inner diameter from the proximal end to the distal end, the distal end inner diameter of the first part 31, the inner diameter of the second part 32 and the proximal end inner diameter of the third part 33 are equal, the cutting blade 4 extends along the proximal end of the second part 32 to the distal end thereof, the proximal end of the second segment 22 is approximately aligned with the proximal end of the second part 32, the distal end of the fourth segment 24 is approximately aligned with the distal end of the second part 32, and the length ratio of the second segment 22, the third segment 23 and the fourth segment 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 the direction parallel to the axis of the balloon 3, and the axis of the cutting blade 4 and the axis of the balloon 3 are respectively located on the 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 comprises a transmission shaft 51 fixedly connected with 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, the second section 22 and the fourth section 24 are driven to rotate around the rotation center line. When the balloon 3 is in the radial expansion state, the rotor motor 52 drives the transmission shaft 51 to rotate, thereby driving the second section 22 and the fourth section 24 to rotate, so that the balloon 3 and the cutting blade 4 vibrate. In this embodiment, the first transmission shaft support ring 61, the second transmission shaft support ring 62, the third transmission shaft support ring 63, the fourth transmission shaft support ring 64 and the fifth transmission shaft support ring 65 are fixedly sleeved on the first section 21, the third section 23 and the fifth section 25. The first transmission shaft passage is formed in each transmission shaft support ring. The second transmission shaft passage extending along the rotation center line is formed in the side wall of the second section 22 and the fourth section 24. The rotor motor 52 is arranged outside the proximal end of the outer tube 1. The rotation shaft is rotatably arranged in the balloon inflation passage and the first transmission shaft passage, and is relatively fixedly arranged in the second transmission shaft passage.

[0051] Specifically, the catheter seat 7 is fixedly arranged at the proximal end of the inner tube and the outer tube 1. The catheter seat 7 has the first passage 71 with the first inlet, the second passage 72 with the second inlet communicating with the balloon inflation passage, and the third passage 73 communicating with the balloon inflation passage and used for the transmission shaft 51 to pass through. The rotor motor 52 is detachably mounted at the proximal end of the third passage 73. In this embodiment, the distal end of the first passage 71 is connected with the hemostatic valve through the luer joint.

[0052] In this embodiment, when the balloon 3 is in the radial expansion state, the rotor motor 52 drives the transmission shaft 51 to rotate, thereby 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 agitation of the liquid filled in the balloon 3 make the cutting blade 4 have directional impact on the inner wall of the balloon 3 at a certain frequency, thereby driving the balloon 3 and the cutting blade 4 to vibrate. The cutting blade 4 directionally 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 appropriate impact force and impact frequency, so as to achieve the changed cutting efficiency and better cutting effect.

[0053] The use method of the impact cutting balloon catheter of this embodiment is as follows:

[0054] (1) Before use, the second section 22 and the fourth section 24 are rotated to the coaxial state 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 sequentially threaded through the first segment 21, the second segment 22, the third segment 23, the fourth segment 24, the fifth segment 25, the sixth segment 26 and the seventh segment 27 through the first channel 71, and the guide wire is used to guide the impact cutting balloon catheter to the balloon 3 to the lesion site;

[0056] (3) the liquid is delivered into the balloon 3 through the second channel 72 and the balloon inflation channel to radially expand the balloon 3;

[0057] (4) the guide wire is withdrawn into the first segment 21, and the second segment 22 and the fourth segment 24 are rotated by driving the transmission shaft 51 to rotate through the rotor motor 52;

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

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

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

[0061] (8) the guide wire is withdrawn.

[0062] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An impact cutting balloon catheter, characterized by, The impact cutting balloon catheter comprises: an outer tube; an inner tube composed of a first segment, a second segment, a third segment, a fourth segment, a fifth segment, a sixth segment and a seventh segment with both ends open in hollow tubular structure connected in sequence and in communication, the first segment is inserted into the outer tube and the distal end extends out of the distal end of the outer tube, the second segment and the fourth segment have the same rotation center line which is parallel to but not coincident with the axis of the second segment and the fourth segment; a balloon with a radially expanded state and a radially contracted state, the proximal end of the balloon is sealingly and fixedly connected with the distal end of the outer tube, the distal end of the balloon is sealingly and fixedly connected with the seventh segment, the axis of the balloon is parallel to but not coincident with the rotation center line, the inner wall of the outer tube and the outer wall of the first segment form a balloon filling channel in communication with the interior of the balloon for delivering liquid into the balloon; a cutting blade arranged on the outer surface of the balloon and extending in the direction parallel to the axis of the balloon, the cutting blade and the axis of the balloon are respectively located on the opposite sides of the rotation center line; a drive assembly comprising a transmission shaft fixedly connected with the second segment and the fourth segment and a rotor motor for driving the transmission shaft to rotate around its axis, the transmission shaft drives the second segment and the fourth segment to rotate around the rotation center line when rotating, when the balloon is in the radially expanded state, the transmission shaft is driven to rotate by the rotor motor, which in turn drives the second segment and the fourth segment to rotate, causing the balloon and the cutting blade to vibrate.

2. The impact cutting balloon catheter of claim 1, wherein, A transmission shaft support ring is fixedly sleeved on the first segment, the third segment and the fifth segment, a first transmission shaft channel is formed on the transmission shaft support ring, a second transmission shaft channel extending along the rotation center line is formed on the side wall of the second segment and the fourth segment, the rotor motor is arranged outside the proximal end of the outer tube, the transmission shaft is rotatably arranged in the balloon filling channel and the first transmission shaft channel and fixedly arranged in the second transmission shaft channel.

3. The impact cutting balloon catheter of claim 2, wherein, The inner diameters of the first segment, the third segment and the fifth segment are equal, the outer diameters of the first segment, the third segment and the fifth segment are equal, the outer diameters of the second segment and the fourth segment are greater than that of the first segment, the second segment and the fourth segment are respectively provided with a guide wire channel and the second transmission shaft channel, the guide wire channel is coaxial with the first segment and has the same inner diameter, the axis of the guide wire channel is not coincident with the axis of the second segment and the fourth segment.

4. The impact cutting balloon catheter of claim 2, wherein, The transmission shaft support ring, the second segment and the fourth segment are made of metal, and the first segment, the third segment, the fifth segment and the seventh segment are made of high polymer material.

5. The impact cutting balloon catheter of claim 4, wherein, The transmission shaft support ring, the second segment and the fourth segment are provided with a developing coating.

6. The impact cutting balloon catheter of claim 2, wherein, The balloon is composed of a first part with gradually increasing inner diameter from proximal end to distal end, a second part with constant inner diameter connected to the distal end of the first part, and a third part with gradually decreasing inner diameter from proximal end to distal end connected to the distal end of the second part, the distal end inner diameter of the first part, the inner diameter of the second part, and the proximal end inner diameter of the third part are equal, the cutting blade extends along the proximal end of the second part to its distal end, the proximal end of the second segment is approximately aligned with the proximal end of the second part, the distal end of the fourth segment is approximately aligned with the distal end of the second part, and the length ratio of the second segment, the third segment, and the fourth segment is 1:(3~5):(0.95~1.05).

7. The impact cutting balloon catheter of claim 1, wherein, The sixth segment 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 fixedly connected with the distal end of the fifth segment respectively, the distal end of the connecting bracket and the distal end of the rubber hose are fixedly connected with the proximal end of the sixth segment respectively, the connecting bracket is woven by a plurality of metal wires, and the connecting bracket has a hollow structure.

8. The impact cutting balloon catheter of claim 1, wherein, The impact cutting balloon catheter further comprises a catheter seat fixedly arranged at the proximal end of the inner tube and the outer tube, the catheter seat is provided with a first channel with a first outlet communicating with the proximal end of the inner tube, a second channel with a second outlet communicating with the balloon inflation channel, and a third channel for the transmission shaft to pass through and communicating with the balloon inflation channel, and the rotor motor is detachably mounted at the proximal end of the third channel.

9. The impact cutting balloon catheter of claim 8, wherein, The distal end of the first channel is detachably connected with a hemostatic valve.

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