Catheter rotating structure and blade balloon

Abstract

The invention belongs to the technical field of medical instruments, and discloses a catheter rotating structure and a blade balloon. The second connecting pipe is in sliding and rotating fit with the first connecting pipe; the rotating assembly comprises a first rack and a tooth groove, the first rack is annularly arranged on the peripheral wall of the first connecting pipe, the tooth groove is annularly formed in the second connecting pipe, the tooth groove is provided with a first guide inclined surface, and the first rack slides along the first guide inclined surface to enable the first connecting pipe to rotate by a specific angle so as to drive the first rack to be meshed with the tooth groove; the sliding cover is arranged at the joint of the first connecting pipe and the second connecting pipe, a guide groove is formed in the inner wall of the push-pull pipe, and the first rack slides along the guide groove; the elastic piece covers the peripheral wall of the first connecting pipe, and the two ends of the elastic piece make contact with and abut against the push-pull pipe and the first connecting pipe respectively. The angle adjusting operation of the catheter can be more accurately and efficiently carried out, the operation difficulty is reduced, and meanwhile the accuracy and safety of an operation are improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to a catheter rotation structure and a blade balloon. Background Art

[0002] In the field of interventional therapy, balloon catheters are important tools for performing angioplasty and other interventional vascular procedures. Traditional balloon catheters are used to dilate narrowed or blocked blood vessels. Blade balloons are equipped with micro blades on their surface. Blade balloons can longitudinally cut atherosclerotic plaques during expansion to relieve annular pressure, reduce potential damage caused by balloon expansion, and limit damage to the incision, effectively reducing the risk of irregular tearing and severe dissection.

[0003] In current angioplasty surgeries, doctors usually use a blade balloon to make multiple cuts on narrow blood vessels. In order to achieve the ideal cutting effect, doctors need to manually adjust the angle of the balloon based on the characteristics and location of the lesion, based on professional skills and clinical experience. Usually, each time the catheter is rotated, the blade balloon is driven to rotate. After the blade balloon rotates, the blade balloon expands to cut the hardened plaque in the blood vessel. After each cut, the doctor needs to rotate the balloon to a certain angle before making the next cut. When performing multiple cuts, it is difficult for doctors to ensure that the angle of the blade balloon is consistent each time, so the cutting position of the blade balloon cannot be accurately determined, and the uniformity of the cutting of the blade balloon in the circumferential direction cannot be guaranteed, resulting in complicated surgical operations and affecting the patient's treatment effect and recovery speed. Summary of the invention

[0004] The embodiments of the present application provide a catheter rotation structure and a blade balloon, which enable doctors to adjust the angle of the catheter more accurately and efficiently during interventional surgery, thereby achieving precise cutting of the blade balloon and forming uniform incisions, improving the patient's treatment effect and recovery speed; at the same time, it reduces the doctor's operating difficulty, thereby improving the accuracy, safety and success rate of the surgery.

[0005] The present application provides a catheter rotation structure and a blade balloon adopting the following technical solutions:

[0006] In a first aspect, the present application provides a catheter rotation structure, which adopts the following technical solution:

[0007] A catheter rotating structure, comprising:

[0008] A first connecting tube, used for connecting to the balloon;

[0009] A second connecting pipe, used for connecting to a pressure pump, the second connecting pipe and the first connecting pipe being slidably and rotationally matched;

[0010] A rotating assembly, comprising a first rack and a tooth groove, wherein the first rack is annularly arranged on the outer peripheral wall of the first connecting tube, the tooth groove is annularly arranged on the end surface of the second connecting tube facing the second connecting tube, the tooth groove has a first guiding inclined surface, and the first rack slides along the first guiding inclined surface to rotate the first connecting tube to a specific angle, thereby driving the first rack to engage with the tooth groove;

[0011] A push-pull tube, a sliding cover is arranged at the connection between the first connecting tube and the second connecting tube, a guide groove is arranged on the inner wall of the push-pull tube, and the first rack slides along the guide groove;

[0012] An elastic member is covered on the outer peripheral wall of the first connecting tube, and two ends of the elastic member respectively contact and press the push-pull tube and the first connecting tube.

[0013] Optionally, the rotating assembly also includes a second rack and a third rack, the second rack is annularly arranged on the inner wall of the push-pull tube, and guide grooves are formed between adjacent second racks, the third rack is annularly arranged on the outer peripheral wall of the second connecting tube, and a second guide inclined surface is arranged on the end face of the third rack facing the second rack, the second rack and the third rack gradually approach each other, and the second rack slides along the second guide inclined surface, and at the same time the first rack slides along the guide groove to drive the first connecting tube to rotate a specific angle.

[0014] Optionally, a third guiding inclined surface is provided on the end surface of the second rack facing the third rack, and the third guiding inclined surface is parallel to the second guiding inclined surface.

[0015] Optionally, an avoidance groove is formed between adjacent third racks, and the second rack slides along the second guide inclined surface to the avoidance groove, thereby causing the second rack to be slidably connected to the avoidance groove; the third rack slides along the third guide inclined surface to the guide groove, thereby causing the third rack to be slidably connected to the guide groove.

[0016] Optionally, the first connecting tube includes a connecting portion, which is located in the second connecting tube, an inner wall of the second connecting tube is provided with a mounting groove, and an outer peripheral wall of the connecting portion is provided with a plurality of first convex rings and second convex rings side by side, the first convex ring is located in the mounting groove and fits with the inner peripheral wall of the mounting groove, the second convex ring is located at one end of the mounting groove, and the outer peripheral wall of the second convex ring fits with the inner wall of the second connecting tube.

[0017] Optionally, a sealing ring is provided between adjacent first convex rings, and an outer peripheral wall of the sealing ring is fitted and pressed against an inner peripheral wall of the installation groove to seal the connecting portion and the second connecting pipe.

[0018] Optionally, a rotation scale mark is provided on the outer peripheral wall of the first connecting tube, and the rotation scale mark is used to correspond to the rotation angle of the first connecting tube.

[0019] Optionally, an outer peripheral wall of the push-pull tube is provided with a marking arrow, and the marking arrow is used to show the sliding direction of the push-pull tube.

[0020] Optionally, the outer peripheral wall of the push-pull tube is further provided with anti-slip patterns, and the anti-slip patterns are used to enhance the friction between the hand and the push-pull tube.

[0021] In a second aspect, the present application provides a blade balloon, which adopts the following technical solution:

[0022] A blade balloon comprises the above-mentioned catheter rotation positioning structure, a blade balloon and a pressure pump, wherein the first connecting tube is used to connect the blade balloon, and the second connecting tube is used to connect the pressure pump.

[0023] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0024] When the balloon angle needs to be adjusted, a force is applied to the push-pull tube to make the push-pull tube move along the length direction of the push-pull tube to compress the elastic member, and the elastic member presses the first connecting tube to make the first connecting tube move toward the second connecting tube, and the first rack gradually approaches the tooth groove along the guide groove, and the first rack contacts the first guide inclined surface and slides along the first guide inclined surface, and the first rack applies a rotational force to the guide groove so that the guide groove drives the first connecting tube to gradually rotate, and when the first rack moves along the guide inclined surface to the lowest end of the tooth groove, the first rack engages with the tooth groove to limit the first connecting tube from continuing to rotate, thereby realizing a specific angle rotation of the first connecting tube; after completing the balloon angle adjustment, the operator releases the push-pull tube, and the push-pull tube and the first connecting tube are reset under the rebound force of the elastic member, driving the first rack to re-enter the guide groove to complete the fixation of the first connecting tube. The operator can control the rotation of the first connecting tube by operating the push-pull tube through simple push-pull actions, thereby adjusting the rotation angle of the balloon, which reduces the difficulty of operation for the doctor. The doctor can perform angle adjustment operations more accurately and efficiently during interventional surgery, achieve precise cutting of the blade balloon and form uniform incisions, improve the patient's treatment effect and recovery speed, and thus improve the accuracy, safety and success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in 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 recorded in the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1It is a schematic diagram of the overall structure of a catheter rotation structure disclosed in an embodiment of the present application;

[0027] Figure 2 An exploded view of a catheter rotation structure disclosed in an embodiment of the present application;

[0028] Figure 3 A cross-sectional view showing a structure of a push-pull tube in a catheter rotation structure disclosed in an embodiment of the present application;

[0029] Figure 4 A schematic structural diagram of a catheter rotation structure disclosed in an embodiment of the present application highlighting a first connecting tube and a second connecting tube.

[0030] Description of reference numerals:

[0031] 1. First connecting tube; 11. Connecting part; 12. First convex ring; 13. Second convex ring; 2. Second connecting tube; 21. Mounting groove; 3. Rotating assembly; 31. First rack; 32. Tooth groove; 321. First guide slope; 33. Second rack; 331. Third guide slope; 34. Third rack; 341. Second guide slope; 35. Avoidance groove; 4. Push-pull tube; 41. Guide groove; 42. Anti-slip ring; 5. Elastic member. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] An embodiment of the present application provides a catheter rotation structure and a blade balloon. The catheter rotation structure enables doctors to adjust the angle of the catheter more accurately and efficiently during interventional surgery. The angle of the blade balloon is adjusted by adjusting the catheter to achieve precise cutting of the blade balloon and form a uniform incision, thereby improving the patient's treatment effect and recovery speed. At the same time, the present application simplifies the surgical operation, thereby improving the accuracy, safety and success rate of the surgery.

[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] In current angioplasty surgeries, doctors usually use a blade balloon to make multiple cuts on narrow blood vessels. In order to achieve the ideal cutting effect, doctors need to manually adjust the angle of the balloon based on the characteristics and location of the lesion, based on professional skills and clinical experience. Usually, each time the catheter is rotated, the blade balloon is driven to rotate. After the blade balloon rotates, the blade balloon expands to cut the hardened plaque in the blood vessel. After each cut, the doctor needs to rotate the balloon to a certain angle before making the next cut. When performing multiple cuts, it is difficult for doctors to ensure that the angle of the blade balloon is consistent each time, so the cutting position of the blade balloon cannot be accurately determined, and the uniformity of the cutting of the blade balloon in the circumferential direction cannot be guaranteed, resulting in complicated surgical operations and affecting the patient's treatment effect and recovery speed.

[0037] In order to solve the above technical problems, the present application provides a catheter rotation positioning structure and a blade balloon. Figure 1 and Figure 2 , is an embodiment of the catheter rotation positioning structure of the present application, comprising a first connecting tube 1, a second connecting tube 2, a push-pull tube 4, an elastic member 5 and a rotating assembly 3. The first connecting tube 1 is used to connect the balloon, the second connecting tube 2 is used to connect the pressure pump, the second connecting tube 2 and the first connecting tube 1 slide and rotate together, the push-pull tube 4 sliding cover is arranged at the connection between the first connecting tube 1 and the second connecting tube 2, the elastic member 5 is covered on the outer peripheral wall of the first connecting tube 1, and the two ends of the elastic member 5 contact and press the push-pull tube 4 and the first connecting tube 1 respectively, and a force is applied to the push-pull tube 4 to make the push-pull tube 4 move along the length direction of the push-pull tube 4 to compress the elastic member 5, and the elastic member 5 presses the first connecting tube 1 to make the first connecting tube 1 move toward the second connecting tube 2.

[0038] See also Figures 2 to 4The rotating component 3 includes a first rack 31 and a tooth groove 32. The first rack 31 is annularly arranged on the outer peripheral wall of the first connecting tube 1, and the tooth groove 32 is annularly arranged on the end surface of the second connecting tube 2 facing the second connecting tube 2. The tooth groove 32 has a first guide inclined surface 321. The first rack 31 slides along the first guide inclined surface 321 to rotate the first connecting tube 1 at a specific angle, thereby driving the first rack 31 to engage with the tooth groove 32; a guide groove 41 is arranged on the inner wall of the push-pull tube 4, and the first rack 31 slides along the guide groove 41.

[0039] It can be understood that when the first connecting tube 1 moves toward the second connecting tube 2, the first rack 31 gradually approaches the tooth groove 32 along the guide groove 41, the first rack 31 contacts the first guide bevel 321 and slides along the first guide bevel 321, the first rack 31 applies a rotational force to the guide groove 41 so that the guide groove 41 drives the first connecting tube 1 to gradually rotate, and when the first rack 31 moves to the lowest end of the tooth groove 32, the first rack 31 engages with the tooth groove 32 to limit the first connecting tube 1 from continuing to rotate, thereby realizing a specific angle rotation of the first connecting tube 1.

[0040] In order to increase the rotation angle of the first connecting tube 1, the rotating assembly 3 further includes a second rack 33 and a third rack 34. The second rack 33 is annularly arranged on the inner wall of the push-pull tube 4, and a guide groove 41 is formed between adjacent second racks 33. The third rack 34 is annularly arranged on the outer peripheral wall of the second connecting tube 2. The end surface of the third rack 34 facing the second rack 33 is provided with a second guide inclined surface 341. The second rack 33 and the third rack 34 gradually approach each other and the second rack 33 slides along the second guide inclined surface 341. At the same time, the first rack 31 slides along the guide groove 41 to drive the first connecting tube 1 to rotate a specific angle. An avoidance groove 35 is formed between adjacent third racks 34. The second rack 33 slides along the second guide inclined surface 341 to the avoidance groove 35, and then the second rack 33 is slidably connected with the avoidance groove 35.

[0041] It can be understood that when the first connecting tube 1 moves toward the second connecting tube 2, the second rack 33 moves toward the third rack 34, the second rack 33 and the third rack 34 gradually approach each other until the second rack 33 contacts the third rack 34, the second rack 33 slides along the second guide slope 341, until the second rack 33 disengages from the second guide slope 341 and slides to the avoidance groove 35, the second rack 33 is located in the avoidance groove 35 and is slidably connected to the avoidance groove 35, while the second rack 33 slides toward the third rack 34, the first rack 31 slides along the guide groove 41 to drive the first connecting tube 1 to rotate a specific angle, at which time there is a gap between the first rack 31 and the tooth groove 32, and the first rack 31 is not engaged with the tooth groove 32. Therefore, before the first rack 31 is engaged with the tooth groove 32, the second rack 33 and the third rack 34 cooperate to realize the first angle rotation of the first connecting tube 1, increasing the rotation angle of the first connecting tube 1 to improve the work efficiency of medical staff.

[0042] Furthermore, the end surface of the second rack 33 facing the third rack 34 is provided with a third guide slope 331, and the third rack 34 slides along the third guide slope 331 to the guide groove 41, and then the third rack 34 is slidably connected with the guide groove 41. When the second rack 33 slides along the second guide slope 341, the third rack 34 slides along the third guide slope 331, the second rack 33 disengages from the second guide slope 341 and slides to the avoidance groove 35, the third rack 34 disengages from the third guide slope 331 and slides to the guide groove 41, the first rack 31 and the third rack 34 are both located in the guide groove 41, and at this time the first connecting pipe 1 stops rotating.

[0043] In this embodiment, the third guide bevel 331 is parallel to the second guide bevel 341 , and a fourth guide bevel is provided on the end face of the first rack 31 facing the groove, and the fourth guide bevel is parallel to the first guide bevel 321 , and the inclination direction of the first guide bevel 321 is opposite to the inclination direction of the second guide bevel 341 .

[0044] When the balloon angle needs to be adjusted, a force is applied to the push-pull tube 4 to make the push-pull tube 4 move along the length direction of the push-pull tube 4 to compress the elastic member 5, and the elastic member 5 presses the first connecting tube 1 to make the first connecting tube 1 move toward the second connecting tube 2; the first rack 31 and the second rack 33 move synchronously toward the second connecting tube 2, and the first rack 31 gradually moves close to the tooth groove 32 along the guide groove 41, and the second rack 33 gradually moves close to the third rack 34, and the second rack 33 and the third rack 34 contact each other before the first rack 31 and the tooth groove 32, and the second rack 33 contacts the third rack 34 and the second rack 33 slides along the second guide inclined surface 341 until the second rack 33 disengages from the second guide inclined surface 341 and slides to the avoidance groove 35, and while the second rack 33 and the third rack 34 slide, the first rack 31 moves along the guide groove 41 Slide to drive the first connecting tube 1 to rotate a specific angle; continue to apply force to the push-pull tube 4, as the push-pull tube 4 drives the first connecting tube 1 to continue to move toward the second connecting tube 2, the second rack 33 is located in the avoidance groove 35 and is slidably connected to the avoidance groove 35, the third rack 34 is located in the guide groove 41 and is slidably connected to the guide groove 41, the first rack 31 continues to move toward the tooth groove 32 so that the first rack 31 contacts the first guide bevel 321 and slides along the first guide bevel 321, the first rack 31 applies a rotational force to the guide groove 41 so that the guide groove 41 drives the first connecting tube 1 to rotate gradually, and when the first rack 31 moves along the first guide bevel 321 to the lowest end of the tooth groove 32, the first rack 31 engages with the tooth groove 32 to limit the first connecting tube 1 from continuing to rotate, thereby realizing a secondary specific angle rotation of the first connecting tube 1.

[0045] After completing the balloon angle adjustment, the operator releases the push-pull tube 4 to release the force applied to the push-pull tube 4, and the elastic member 5 rebounds to drive the push-pull tube 4 and the first connecting tube 1 to move in a direction away from the second connecting tube 2. Under the rebound force of the elastic member 5, the push-pull tube 4 and the first connecting tube 1 are reset, and the first rack 31 slides along the guide groove 41 and is located in the guide groove 41 to fix the first connecting tube 1.

[0046] The operator can control the rotation of the first connecting tube 1 by operating the push-pull tube 4 through a simple push-pull action, thereby adjusting the rotation angle of the balloon, which reduces the doctor's operating difficulty. The doctor can perform angle adjustment operations more accurately and efficiently during interventional surgery, achieve precise cutting of the blade balloon and form uniform incisions, improve the patient's treatment effect and recovery speed, and thus improve the accuracy, safety and success rate of the operation.

[0047] See also Figure 2 and Figure 4 The first connecting tube 1 includes a connecting portion 11, which is located in the second connecting tube 2. The inner wall of the second connecting tube 2 is provided with a mounting groove 21. The outer peripheral wall of the connecting portion 11 is provided with a plurality of first convex rings 12 and second convex rings 13 in parallel. The first convex ring 12 is located in the mounting groove 21 and fits with the inner peripheral wall of the mounting groove 21. The second convex ring 13 is located at one end of the mounting groove 21, and the outer peripheral wall of the second convex ring 13 fits with the inner wall of the second connecting tube 2. A sealing ring is provided between adjacent first convex rings 12. The sealing ring is preferably a rubber ring. The outer peripheral wall of the sealing ring fits and presses with the inner peripheral wall of the mounting groove to seal the connecting portion 11 and the second connecting tube 2. The provision of the first convex ring 12, the second convex ring 13 and the sealing ring ensures that there will be no leakage between the first connecting tube 1 and the second connecting tube 2 during use.

[0048] In order to provide an intuitive rotation angle and ensure the accuracy of the rotation operation of the first connecting tube 1 , a rotation scale mark is provided on the outer peripheral wall of one end of the first connecting tube 1 away from the connecting portion 11 , and the rotation scale mark is used to correspond to the rotation angle of the first connecting tube 1 .

[0049] The outer wall of the push-pull tube 4 is provided with an identification arrow, which is used to show the sliding direction of the push-pull tube 4. In this embodiment, the sliding direction of the push-pull tube 4 is toward the second connecting tube 2. During operation, it is only necessary to apply force to the push-pull tube 4 in the direction of the identification arrow to achieve the angle adjustment of the first connecting tube 1.

[0050] Furthermore, the outer wall of the push-pull tube 4 is also provided with anti-skid patterns, which are used to enhance the friction between the hand and the push-pull tube 4, so as to ensure that the medical staff can operate smoothly even when wearing gloves. In this embodiment, the anti-skid patterns are provided by providing an anti-skid ring 42 and a groove on the outer wall of the push-pull tube 4, and the anti-skid ring 42 is provided in the groove, and the friction between the outer wall of the push-pull tube 4 and the hand is enhanced by the anti-skid ring 42. In some other embodiments, the anti-skid patterns are obtained by providing annular convex strips or vertical convex strips on the outer wall of the push-pull tube 4, and the friction between the outer wall of the push-pull tube 4 and the hand is enhanced by the annular convex strips or vertical convex strips.

[0051] The present application discloses a blade balloon, which adopts the above-mentioned catheter rotation positioning structure, blade balloon and pressure pump, wherein the first connecting tube 1 is used to connect the blade balloon, and the second connecting tube 2 is used to connect the pressure pump. The operator only needs to apply force to the push-pull tube 4 in the direction of the marked arrow to achieve the angle adjustment of the first connecting tube 1, and the angle adjustment of the first connecting tube 1 synchronously drives the angle adjustment of the blade balloon. The doctor can perform catheter operation more accurately and efficiently during the interventional surgery, achieve accurate cutting of the blade balloon and form a uniform incision, improve the patient's treatment effect and recovery speed, thereby improving the accuracy, safety and success rate of the surgery.

[0052] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A catheter rotating structure, characterized in that: include: A first connecting tube, used for connecting to the balloon; A second connecting pipe, used for connecting to a pressure pump, the second connecting pipe and the first connecting pipe being slidably and rotationally matched; A rotating assembly, comprising a first rack and a tooth groove, wherein the first rack is annularly arranged on the outer peripheral wall of the first connecting tube, the tooth groove is annularly arranged on the end surface of the second connecting tube facing the second connecting tube, the tooth groove has a first guiding inclined surface, and the first rack slides along the first guiding inclined surface to rotate the first connecting tube to a specific angle, thereby driving the first rack to engage with the tooth groove; A push-pull tube, a sliding cover is arranged at the connection between the first connecting tube and the second connecting tube, a guide groove is arranged on the inner wall of the push-pull tube, and the first rack slides along the guide groove; An elastic member is covered on the outer peripheral wall of the first connecting tube, and two ends of the elastic member respectively contact and press the push-pull tube and the first connecting tube.

2. A catheter rotating structure according to claim 1, characterized in that: The rotating assembly also includes a second rack and a third rack. The second rack is annularly arranged on the inner wall of the push-pull tube, and guide grooves are formed between adjacent second racks. The third rack is annularly arranged on the outer peripheral wall of the second connecting tube, and a second guide inclined surface is arranged on the end face of the third rack facing the second rack. The second rack and the third rack gradually approach each other, and the second rack slides along the second guide inclined surface. At the same time, the first rack slides along the guide groove to drive the first connecting tube to rotate a specific angle.

3. A catheter rotating structure according to claim 2, characterized in that: A third guiding inclined surface is provided on the end surface of the second rack facing the third rack, and the third guiding inclined surface is parallel to the second guiding inclined surface.

4. The catheter rotating structure according to claim 3, characterized in that: An avoidance groove is formed between adjacent third racks, and the second rack slides along the second guide inclined surface to the avoidance groove, thereby causing the second rack to be slidably connected to the avoidance groove; the third rack slides along the third guide inclined surface to the guide groove, thereby causing the third rack to be slidably connected to the guide groove.

5. The catheter rotating structure according to claim 1, characterized in that: The first connecting tube includes a connecting portion, which is located in the second connecting tube. The inner wall of the second connecting tube is provided with a mounting groove. A plurality of first convex rings and second convex rings are arranged side by side on the outer peripheral wall of the connecting portion. The first convex ring is located in the mounting groove and fits with the inner peripheral wall of the mounting groove. The second convex ring is located at one end of the mounting groove, and the outer peripheral wall of the second convex ring fits with the inner wall of the second connecting tube.

6. The catheter rotating structure according to claim 5, characterized in that: A sealing ring is arranged between adjacent first convex rings, and the outer peripheral wall of the sealing ring is fitted and pressed against the inner peripheral wall of the installation groove to seal the connecting portion and the second connecting pipe.

7. The catheter rotating structure according to claim 1, characterized in that: The outer peripheral wall of the first connecting tube is provided with a rotation scale mark, and the rotation scale mark is used to correspond to the rotation angle of the first connecting tube.

8. The catheter rotating structure according to claim 1, characterized in that: The outer peripheral wall of the push-pull tube is provided with a marking arrow, and the marking arrow is used to show the sliding direction of the push-pull tube.

9. The catheter rotating structure according to claim 8, characterized in that: The outer peripheral wall of the push-pull tube is also provided with anti-skid patterns, and the anti-skid patterns are used to enhance the friction between the hand and the push-pull tube.

10. A blade balloon, characterized in that: It comprises the catheter rotation positioning structure, a blade balloon and a pressure pump as described in any one of claims 1 to 9, wherein the first connecting tube is used to connect the blade balloon, and the second connecting tube is used to connect the pressure pump.

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