A special catheter for superselection of the right vertebral artery via the right radial artery

Abstract

The invention relates to a catheter specially used for superselecting a right vertebral artery via a right radial artery, belonging to the technical field of cerebrovascular catheters. The catheter comprises a catheter body, a first bending section, a second bending section and a third bending section, wherein the catheter body, the first bending section, the second bending section and the third bending section are sequentially connected end to end in the same plane, the catheter body and each bending section are pre-shaped structures, the second bending section adopts a straight tube structure, the angle between the first bending section and the second bending section is 100-160°, the angle between the third bending section and the second bending section is 110-160°, the length of the first bending section is 5-20 mm, the length of the second bending section is 5-25 mm, and the length of the third bending section is 4-11 mm; the catheter body does not need to penetrate deeply into the aortic arch and has a high degree of fit to the puncture path.

Description

Technical Field

[0001] The invention belongs to the technical field of cerebral vascular catheters, and in particular relates to a catheter used exclusively for superselecting a right vertebral artery via a right radial artery. Background Art

[0002] In the surgical treatment of cerebrovascular diseases, interventional treatment by catheter puncture into blood vessels is still an important method, and the catheter needs to enter the cerebral blood vessels from other arteries. At present, due to the mainstream catheter shape design and the mainstream doctor's operating habits, the general method is to puncture the cerebral blood vessels through the femoral artery. However, this method has the disadvantages of a higher probability of vascular puncture complications such as arteriovenous fistula and pseudoaneurysm, a longer postoperative recovery time for patients, and a higher degree of pain for patients.

[0003] In view of this, the medical community has invented the radial artery puncture method. Compared with the puncture via the femoral artery approach, the puncture via the radial artery approach not only has a lower chance of vascular puncture complications, a shorter postoperative recovery time, and less pain for the patient, but also has the characteristics of a higher surgical success rate and low bleeding at the puncture site. Currently, most catheters used for radial artery puncture can superselect from the left and right radial arteries. Currently, most catheters are designed to superselect from either the left radial artery or the right radial artery into any of the left common carotid artery, left vertebral artery, right common carotid artery, or right vertebral artery. However, the puncture path of radial artery puncture is more complicated, and in the vascular bifurcation area in the area to be superselected, the left and right arterial structures are asymmetric, which means that this design will inevitably be unable to fully fit all puncture paths and combinations of blood vessels to be superselected. Failure to fully fit will lead to increased pressure on the blood vessels, and the probability of damage to the blood vessel wall during surgery will increase accordingly. Improvement, and failure to fully fit will reduce the accuracy of superselection. For this reason, a cerebrovascular catheter specially designed for superselecting a target blood vessel through a certain radial artery is needed, such as a catheter specially used for superselecting the right common carotid artery through the right radial artery; at the same time, the support point of this catheter is mostly set in the aortic arch. On the one hand, according to investigation, patients who need cerebrovascular puncture treatment often have a higher probability of suffering from aortic arch diseases such as aortic arch atherosclerosis than ordinary people. When using this catheter with a support point set in the aortic arch to perform surgery on the patient, the support point and the blood vessel wall will cause the hardened blocks in the aortic arch to fall off and form thrombus, further increasing the risk of intraoperative complications; on the other hand, it is often difficult to perform superselection operations in the aortic arch, making it difficult to align the catheter head with the direction of the target blood vessel, resulting in a longer operation time. For this reason, a catheter with a support point far away from the aortic arch is needed. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a special catheter for superselecting the right vertebral artery via the right radial artery, which has the characteristics of high fit for the puncture path while not having to penetrate deep into the aortic arch.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A catheter specially used for superselecting the right vertebral artery via the right radial artery is characterized by comprising: a catheter body, a first bending segment, a second bending segment and a third bending segment, wherein the catheter body, the first bending segment, the second bending segment and the third bending segment are sequentially connected end to end in the same plane, and the catheter body and each bending segment are pre-shaped structures.

[0007] As a preferred technical solution of the present invention, the catheter is pre-molded into the following shape: the angle between the catheter body and the first bending section is 100-160°, the bending direction of the second bending section is opposite to that of the first bending section, the angle between the third bending section and the first bending section is 50-140°, the length of the first bending section is 3-20 mm, the length of the second bending section is 5-25 mm, and the length of the third bending section is 3-11 mm.

[0008] As a preferred technical solution of the present invention, the second bending section adopts a straight tube structure, the angle between the first bending section and the second bending section is 100-160°, the angle between the third bending section and the second bending section is 110-160°, the length of the first bending section is 5-20mm, the length of the second bending section is 5-25mm, and the length of the third bending section is 4-11mm.

[0009] As a preferred technical solution of the present invention, the second bending section adopts an arc tube structure, the bending arc of the second bending section is 60-90°, the first bending section and the second bending section are tangent, the third bending section and the second bending section are tangent, the length of the first bending section is 3-15mm, the radius of the second bending section is 5-10mm, and the length of the third bending section is 3-10mm.

[0010] As a preferred technical solution of the present invention, the connection between the first bending section and the second bending section is wrapped with a bending support component, and the elastic coefficient of the inner corner side wall of the bending support component is greater than the elastic coefficient of the outer corner side wall.

[0011] As a preferred technical solution of the present invention, the catheter is made of medical polymer material.

[0012] As a preferred technical solution of the present invention, a tail end connector is provided at one end of the catheter body away from the first bending section, and the tail end connector is adapted to a universal three-way connector.

[0013] As a preferred technical solution of the present invention, the outer surface of the catheter is coated with a sliding hydrophilic coating, and the sliding hydrophilic coating is sequentially coated on the outer surfaces of the third bending section, the second bending section, the first bending section and the catheter body from the front end of the third bending section, and the extension length of the sliding hydrophilic coating from the front end of the third bending section toward the catheter body is 40cm-80cm.

[0014] As a preferred technical solution of the present invention, one end of the third bending section away from the second bending section is a tapered structure.

[0015] The beneficial effects of the present invention are:

[0016] (1) By pre-molding the shape of the catheter so that the angle between the catheter body and the first bending section is 100 to 160 degrees, the bending direction of the second bending section is opposite to that of the first bending section, and the angle between the third bending section and the first bending section is 50 to 140 degrees, the catheter can be better adapted to the specific puncture path of superselecting the right vertebral artery through the right radial artery, thereby improving the success rate of the operation and reducing the operation time;

[0017] (2) By setting the catheter size so that the length of the first bend section is 3 to 20 mm, the length of the second bend section is 5 to 25 mm, and the length of the third bend section is 3 to 11 mm, the catheter does not need to penetrate deep into the aortic arch to perform the more difficult superselection in the aortic arch during the superselection process, thereby further reducing the operation time and the possibility of surgery-induced aortic arch disease. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention when the angle between the right vertebral artery and the right subclavian artery is larger;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention when the angle between the right vertebral artery and the right subclavian artery is small;

[0021] Figure 3 It is a structural schematic diagram of the present invention when the angle between the right vertebral artery and the right subclavian artery is large and the right vertebral artery is superselected;

[0022] Figure 4 It is a structural schematic diagram of the present invention for superselecting the right vertebral artery when the included angle between the right vertebral artery and the right subclavian artery is small.

[0023] Description of main component symbols:

[0024] In the figure: 1. catheter body; 2. first bending section; 3. second bending section; 4. third bending section; 5. bending support assembly; 6. tail end connector; 7. aortic arch; 8. right vertebral artery; 9. right subclavian artery. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0026] See also Figure 1-4A catheter specially used for superselecting the right vertebral artery via the right radial artery comprises: a catheter body 1, a first bending section 2, a second bending section 3 and a third bending section 4, wherein the catheter body 1, the first bending section 2, the second bending section 3 and the third bending section 4 are sequentially connected end to end in the same plane, and the catheter body 1 and each bending section are pre-shaped structures; when the medical cerebrovascular catheter for interventional treatment is used, the bending section and the catheter body 1 are sequentially punctured through the right subclavian artery 9 under the guidance of a guide wire, and then the right vertebral artery 8 is superselected in the right subclavian artery 9 under the guidance of the guide wire, but a general catheter is relatively long and is designed to be able to superselect the left carotid artery via either the left radial artery or the right radial artery. The catheter is pre-molded into a shape specially adapted for superselecting the right vertebral artery 8 in the right subclavian artery 9 via the right radial artery. Pre-molding is a manufacturing process widely used in medical interference catheters. After this process, the catheter can maintain or rebound to the pre-molded shape when it is naturally free from external forces. Under certain circumstances, deformation will occur. The specific pre-shaped shape of the catheter in the present invention is: the angle between the catheter body 1 and the first bending section 2 is 100-160°, the bending direction of the second bending section 3 is opposite to that of the first bending section 2, the angle between the third bending section 4 and the first bending section 2 is 50-140°, the length of the first bending section 2 is 3-20mm, the length of the second bending section 3 is 5-25mm, and the length of the third bending section 4 is 3-11mm. When in use, compared with the general catheter setting the catheter head to more than 20cm, the shorter total length can enable the catheter to complete the rebound, angle adjustment or superselection of the catheter in the right subclavian artery 9. At the same time, the catheter body 1 and the first bending section The angle between the segments 2 is set to 100-160°, which can better fit the vascular direction of the right subclavian artery 9 from the right vertebral artery 8 to the puncture point within a range of 30-40 mm, and the bending direction of the second bending segment 3 is set to be opposite to the bending direction of the first bending segment 2, so that the first bending segment 2 and the catheter body 1 can be fitted with the right subclavian artery 9 to become a support for the second bending segment 3, ensuring that the second bending segment 3 better maintains the correct superselection angle of the third bending segment 4, and the angle between the third bending segment 4 and the second bending segment 3 ensures that after the second bending segment 3 is supported, the third bending segment 4 can correctly enter the right vertebral artery 8 and complete the superselection while being away from the aortic arch 7.

[0027] In a specific surgical procedure, the angle between the right vertebral artery 8 and the right subclavian artery 9 of different people is also different. In order to further adapt to the situation where the angle between the right vertebral artery 8 and the right subclavian artery 9 is larger, the second bending section 3 of the present invention can use a straight tube structure, the angle between the first bending section 2 and the second bending section 3 is 100-160°, the angle between the third bending section 4 and the second bending section 3 is 110-160°, the length of the first bending section 2 is 5-20mm, the length of the second bending section 3 is 5-25mm, and the length of the third bending section 4 is 4-11mm. When in use, when the angle between the right vertebral artery 8 and the right subclavian artery 9 is greater than 90°, because the first bending section 2 and the right subclavian artery 9 are greater than 90°, the angle between the first bending section 2 and the right subclavian artery 9 is greater than 90°. While the artery 9 is fitted, it provides support for the third bend segment 4 of the head end, so the angle between the first bend segment 2 and the third bend also needs to be greater than 90°. Under the premise that the second bend segment 3 adopts a straight tube structure, the angle between the first bend segment 2 and the second bend segment 3 is 100-160°, and the angle between the third bend segment 4 and the second bend segment 3 is 110-160°. At this time, the angle between the first bend segment 2 and the third bend segment 4 can be up to 140°. When the angle between the right vertebral artery 8 and the right subclavian artery 9 is large, it can provide support for the third bend segment 4 of the catheter head end while ensuring that the catheter head end can be super-selected into the right vertebral artery 8 with a larger angle in the pre-shaped shape, further adapting to the direction of the blood vessel and ensuring the success rate of super-selection.

[0028] In order to further adapt to the situation where the angle between the right vertebral artery 8 and the right subclavian artery 9 is smaller, the second bending section 3 is an arc tube structure, the bending radius of the second bending section 3 is 60-90°, the first bending section 2 and the second bending section 3 are tangent, the third bending section 4 and the second bending section 3 are tangent, the length of the first bending section 2 is 3-15mm, the radius of the second bending section 3 is 5-10mm, and the length of the third bending section 4 is 3-10mm. When in use, when the angle between the right vertebral artery 8 and the right subclavian artery 9 is less than 90°, the catheter through the right radial artery puncture route needs to be rotated at a larger angle to super-select the right vertebral artery 8. At this time, the second bending section 3 is set to a straight tube structure with insufficient support force and cannot adapt to this situation well. Therefore, in order to further adapt to the situation where the angle between the right vertebral artery 8 and the right subclavian artery 9 is smaller, the second bending section 3 of the present invention can also An arc tube structure is selected, the bending radius of the second bending segment 3 is 60-90°, the first bending segment 2 and the second bending segment 3 are tangent, the third bending segment 4 and the second bending segment 3 are tangent, the length of the first bending segment 2 is 3-15mm, the radius of the second bending segment 3 is 5-10mm, and the length of the third bending segment 4 is 3-10mm. Compared with the straight tube structure with only two pre-shaped bends to provide rebound force as a supporting force, the second bending segment 3 is set to an arc tube structure, which can provide rebound force as a supporting force at each point of the arc tube. By setting the second bending segment 3 to a bending radius of 60-90°, when the angle between the right vertebral artery 8 and the right subclavian artery 9 is small, more effective support can be provided for the third bending segment 4 of the catheter tip, while ensuring that the catheter tip can be super-selected into the right vertebral artery 8 with a smaller angle in the pre-shaped shape, further adapting to the direction of the blood vessels and ensuring the success rate of super-selection.

[0029] In order to further strengthen the support of the catheter to the catheter head end, the connection between the first bending section 2 and the second bending section 3 is wrapped with a bending support component 5, and the bending support component 5 is equally divided into a part close to the inner corner and a part close to the outer corner along the radial direction of the catheter. The elastic coefficient of the part close to the inner corner is greater than that of the part close to the outer corner. In this embodiment, the elastic coefficient of the part close to the inner corner is 20% greater than that of the part close to the outer corner. Since the connection between the first bending section 2 and the second bending section 3 is close to the outer corner and fits the right subclavian artery 9, the bending part on the inner corner side needs to provide a rebound force as a supporting force. By additionally setting the bending support component 5 and the elastic coefficient close to the inner corner side is greater than that of the part close to the outer corner side, the rebound force of the bending part on the inner corner side can be further strengthened to better support the catheter head end. At the same time, controlling the lift to 20% can avoid the head end from puncturing the blood vessel due to insufficient rotation flexibility.

[0030] In order to ensure the hygiene and softness of the catheter, the catheter is made of medical polymer materials. In this embodiment, the catheter is made of silicone rubber material.

[0031] In order to be compatible with other instruments, a tail end connector 6 is provided at one end of the catheter body 1 away from the first bending section 2 , and the tail end connector 6 is a connector compatible with a universal three-way connector.

[0032] To facilitate the sliding of the catheter in the blood vessel, the outer surface of the catheter is coated with a sliding hydrophilic coating, and the sliding hydrophilic coating is sequentially coated on the outer surfaces of the third bending segment 4, the second bending segment 3, the first bending segment 2 and the catheter body 1 from the front end of the third bending segment 4. The extension length of the sliding hydrophilic coating from the front end of the third bending segment 4 toward the catheter body 1 is 40cm-80cm, which can effectively cover the length of the catheter in the blood vessel and facilitate the sliding of the catheter in the blood vessel.

[0033] In order to further reduce the stimulation of the catheter tip on the blood vessel wall and reduce the probability of iatrogenic cerebral embolism, the end of the third bending segment 4 away from the second bending segment 3 is a tapered structure. In this embodiment, a thin tube is provided at the end of the third bending segment 4 away from the second bending segment 3. The diameter of the thin tube is 40 to 60% of the diameter of the third bending segment 4. When in use, compared with a thicker tip, the tip with a tapered structure has less impact on the blood vessel, and the probability of iatrogenic cerebral embolism is lower, which can further reduce the stimulation of the catheter tip on the blood vessel wall and reduce the probability of iatrogenic cerebral embolism.

[0034] The working principle and use process of the present invention are as follows: when in use, the shape of the second bending section 3 is selected as a straight tube structure or an arc tube structure according to the angle direction of the patient's right vertebral artery 8 and the right subclavian artery 9, and the catheter is punctured through the right radial artery approach to the vicinity of the right subclavian artery 9 through the guide wire, and then the third bending section 4 is super-selected into the right vertebral artery 8 under the premise of maintaining the pre-shaped angle through the guide wire. This process is completed in the right subclavian artery 9, and the angle of the catheter ensures that it fits the direction of the right radial artery, the right subclavian artery 9 to the right vertebral artery 8. At the same time, during this process, the second bending section 3 and the bending support assembly 5 further support the catheter head.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A catheter for superselecting the right vertebral artery via the right radial artery, characterized in that: include: A catheter body (1), a first bending section (2), a second bending section (3) and a third bending section (4), wherein the catheter body (1), the first bending section (2), the second bending section (3) and the third bending section (4) are connected end to end in sequence in the same plane, and the catheter body (1) and each bending section are pre-shaped structures; The catheter is pre-molded into the following shape: the angle between the catheter body (1) and the first bending section (2) is 100-160°, the bending direction of the second bending section (3) is opposite to that of the first bending section (2), the angle between the third bending section (4) and the first bending section (2) is 50-140°, the length of the first bending section (2) is 3-20 mm, the length of the second bending section (3) is 5-25 mm, and the length of the third bending section (4) is 3-11 mm; The second bending section (3) is a straight tube structure, the angle between the first bending section (2) and the second bending section (3) is 100-160°, the angle between the third bending section (4) and the second bending section (3) is 110-160°, the length of the first bending section (2) is 5-20 mm, the length of the second bending section (3) is 5-25 mm, and the length of the third bending section (4) is 4-11 mm; The second bending section (3) is an arc tube structure, the bending arc of the second bending section (3) is 60-90°, the first bending section (2) and the second bending section (3) are tangent to each other, the third bending section (4) and the second bending section (3) are tangent to each other, the length of the first bending section (2) is 3-15 mm, the radius of the second bending section (3) is 5-10 mm, and the length of the third bending section (4) is 3-10 mm; The connection between the first bending section (2) and the second bending section (3) is wrapped with a bending support component (5), the elastic coefficient of the inner corner side wall of the bending support component (5) is greater than the elastic coefficient of the outer corner side wall, and the elastic coefficient of the part of the bending support component (5) close to the inner corner is 20% greater than that of the part close to the outer corner.

2. A dedicated catheter for superselecting the right vertebral artery via the right radial artery according to claim 1, characterized in that: The catheter is made of medical polymer materials.

3. A dedicated catheter for superselecting the right vertebral artery via the right radial artery according to claim 1, characterized in that: A tail end connector (6) is provided at one end of the catheter body (1) away from the first bending section (2), and the tail end connector (6) is compatible with a universal three-way connector.

4. A dedicated catheter for superselecting the right vertebral artery via the right radial artery according to claim 1, characterized in that: The outer surface of the catheter is coated with a sliding hydrophilic coating, and the sliding hydrophilic coating is sequentially coated on the outer surfaces of the third bending section (4), the second bending section (3), the first bending section (2) and the catheter body (1) starting from the front end of the third bending section (4), and the sliding hydrophilic coating extends from the front end of the third bending section (4) toward the catheter body (1) for a length of 40 cm to 80 cm.

5. A dedicated catheter for superselecting the right vertebral artery via the right radial artery according to claim 1, characterized in that: The end of the third bending section (4) away from the second bending section (3) is a tapered structure.

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