Passage catheter special for releasing vertebral artery stent through radial artery approach

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a passage catheter special for releasing a vertebral artery stent through a radial artery admission passage, the passage catheter comprises a catheter, the catheter comprises an adjusting catheter and a body catheter, the adjusting catheter and the body catheter are coaxially connected, the body catheter comprises a near-end catheter and a far-end catheter, and the near-end catheter and the far-end catheter are coaxially connected. The near-end catheter comprises a first-stage coating, a first-stage outer tube, an annular cavity channel and a first-stage inner tube, a design scheme for adjusting the bending angle of the far-end catheter is adopted, the bending angle of the far-end catheter can be flexibly adjusted, the near-end catheter can adapt to complex blood vessels, the surgical operation difficulty is reduced, and the surgical efficiency is improved; the catheter comprises the soft head end, and when the head end makes contact with the inner wall of the blood vessel, damage to the blood vessel can be reduced; the catheter has two blood vessel entering modes, namely, the same-side blood vessel entering mode and the different-side blood vessel entering mode, the application mode of the catheter can be widened, and the instrument using cost of a patient is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, and particularly relates to a passage catheter specially used for releasing a vertebral artery stent through a radial artery approach. BACKGROUND

[0002] The radial artery approach for vertebral artery stent implantation is a minimally invasive, safe and increasingly popular technique, especially suitable for patients with specific anatomical conditions and the need for rapid recovery, reducing puncture site complications and having low risk of bleeding: the radial artery is superficial and easy to compress and stop bleeding, significantly reducing the risk of postoperative bleeding, hematoma or pseudoaneurysm, and has the following advantages compared with the traditional femoral artery approach:

[0003] No risk of retroperitoneal hematoma: avoiding retroperitoneal hematoma that may be caused by femoral artery puncture;

[0004] Shorten the braking time: the patient does not need to lie in bed for a long time after the operation, reducing the risk of lower extremity venous thrombosis and improving comfort.

[0005] Immediate postoperative activity: the patient can sit up or walk immediately after the operation, especially suitable for the elderly, patients with lumbar disease or those who cannot tolerate long-term bed rest;

[0006] Avoid the influence of aortic arch curvature: for patients with complex aortic arch anatomy (such as type III arch, bovine arch) or subclavian artery curvature, the radial artery approach may provide a more direct path to the vertebral artery opening;

[0007] However, the existing catheter has some problems: the catheter head is too hard and may damage the blood vessel, and it is difficult to adapt to complex blood vessels, making the catheter difficult to operate. SUMMARY

[0008] The purpose of the present application is to provide a passage catheter specially used for releasing a vertebral artery stent through a radial artery approach to solve the problems raised in the background.

[0009] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0010] A kind of access catheter for releasing vertebral artery stent by radial artery approach, comprising catheter, catheter includes adjusting catheter and body catheter, adjusting catheter and body catheter are coaxially connected, body catheter includes proximal catheter and distal catheter, proximal catheter includes primary coating, primary outer tube, circular annular cavity and primary inner tube, primary outer tube is set outside primary inner tube, circular annular cavity is between the inner wall of primary outer tube and the outer wall of primary inner tube, adjusting catheter is in circular annular cavity, primary coating is coated on the outer wall of primary outer tube, distal catheter includes secondary coating, secondary outer tube, secondary inner tube and bevel head, secondary outer tube is set on the outer wall of secondary inner tube, secondary outer tube is connected with primary outer tube, secondary inner tube is connected with primary inner tube, secondary coating is coated on the outer wall of secondary outer tube, bevel head is set on the end of distal catheter far from proximal catheter, adjusting catheter includes distal straight pipe, spring pipe and proximal straight pipe, spring pipe is welded between distal straight pipe and proximal straight pipe, because distal catheter has no circular annular cavity, and adjusting catheter cannot be loaded inside, so the overall hardness of distal catheter can be half of the hardness of proximal catheter;And the head of distal catheter gradually reduces in outer diameter, with smooth head;Distal catheter is relatively soft, and the smooth head can reduce the damage to blood vessels.

[0011] Preferably, the proximal catheter is L0 part, and the remaining part is the distal catheter, the distal catheter and the proximal catheter adopt a transition radius design, the outer diameter of the distal catheter is smaller than the radius of the proximal catheter, and the outer diameter of the distal catheter gradually decreases from the proximal end to the distal end, and the minimum outer diameter is 2 / 3 of the maximum outer diameter.

[0012] Preferably, L3 is the over-bending length, L4 is the head soft design length, and L5 is the bending length, which can better adapt to complex vertebral artery vessels and has a certain arc, so that the body catheter can realize multiple entering modes.

[0013] L3=7cm, the length of L4 is 3-3.5cm, and L5=3cm.

[0014] Preferably, the distal straight pipe is provided with a starting position line and an ending position line, and L1 is the starting and ending distance, the starting position line and the ending position line are set to define the adjustable area position of the adjusting catheter.

[0015] L1=4cm.

[0016] Preferably, the proximal straight pipe is provided with a plurality of indicating scale lines, and the indicating scale lines are set to facilitate user operation.

[0017] L2 is the distance of the plurality of indicating scale lines, and L2=4-8cm.

[0018] Preferably, the primary coating is a hydrophilic coating, and the primary coating is made of one or a mixture of materials such as PVP, polyurethane, acrylate, hydrogel, and PEG-based materials, which can reduce the friction coefficient of the outer surface of the main catheter and improve the passage of the main catheter in blood vessels. The secondary coating contains a material with imaging properties, such as one or a mixture of materials such as platinum-iridium, tungsten, bismuth oxychloride, and barium sulfate, so that the distal end of the main catheter can be visualized in blood vessels, and the location of the distal end of the main catheter can be viewed in real time.

[0019] Preferably, the adjusting catheter includes a distal straight tube, a spring tube, and a proximal straight tube. The spring tube is welded between the distal and proximal straight tubes. The distal straight tube, spring tube, and proximal straight tube are coaxially arranged, and their outer and inner diameters are equal. The distal straight tube, spring tube, and proximal straight tube are made of the same metal material, such as stainless steel, nickel-titanium alloy, titanium alloy, niobium-titanium alloy, or platinum-nickel alloy. Under the action of the proximal straight tube, the spring tube and the distal straight tube are inserted into the annular cavity of the main catheter.

[0020] Preferably, the adjusting catheter includes a distal straight tube, a pneumatic tube, and a proximal straight tube. The pneumatic tube is bonded between the distal and proximal straight tubes and is made of medical-grade silicone rubber. An inflation cavity is formed in the middle of the tube wall of the pneumatic tube and is filled with air. The distal straight tube, pneumatic tube, and proximal straight tube are coaxially arranged, and their outer and inner diameters are equal. The distal and proximal straight tubes are made of the same metal material, such as stainless steel, nickel-titanium alloy, titanium alloy, niobium-titanium alloy, or platinum-nickel alloy. Driven by the proximal straight tube, the pneumatic tube and the distal straight tube are inserted into the annular cavity of the main catheter.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: When in use, the present invention adopts a design scheme for adjusting the bending angle of the distal catheter, which can flexibly adjust the bending angle of the distal catheter, adapting to complex blood vessels, reducing the difficulty of surgical operation, and improving surgical efficiency; the catheter includes a soft tip, which can reduce damage to the blood vessel when the tip contacts the inner wall of the blood vessel; the catheter has two blood vessel entry methods, ipsilateral blood vessel entry and contralateral blood vessel entry, which can broaden the application of the catheter and reduce the cost of instrument use for patients. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a catheter specifically designed for the deployment of vertebral artery stents via the radial artery approach.

[0023] Figure 2 This is a schematic diagram of the main catheter structure of a access catheter specifically designed for the deployment of a vertebral artery stent via the radial artery approach.

[0024] Figure 3 This is a schematic diagram of the proximal catheter cross-section of a catheter specifically designed for the deployment of vertebral artery stents via the radial artery approach.

[0025] Figure 4 This is a schematic diagram of the beveled tip of a catheter specifically designed for deploying a vertebral artery stent via the radial artery approach.

[0026] Figure 5 This is a schematic diagram of an adjustment catheter specifically designed for the deployment of vertebral artery stents via the radial artery approach.

[0027] Figure 6 This is a schematic diagram of the distal straight tube of a catheter specifically designed for deploying vertebral artery stents via the radial artery approach.

[0028] Figure 7 This is a schematic diagram of the proximal straight tube of a catheter specifically designed for deploying vertebral artery stents via the radial artery approach.

[0029] Figure 8 This is a schematic diagram of the starting position angle of a catheter specifically designed for deploying a vertebral artery stent via the radial artery approach.

[0030] Figure 9 This is a schematic diagram of the termination position angle of a catheter specifically designed for deploying vertebral artery stents via the radial artery approach.

[0031] Figure 10 This is a schematic diagram of the distal catheter cross-section of a catheter specifically designed for the deployment of vertebral artery stents via the radial artery approach.

[0032] Figure 11 This is a schematic diagram of the left-side catheter insertion of a catheter specifically designed for radial artery stent delivery.

[0033] Figure 12 This is a schematic diagram of the right-side catheter insertion of a catheter specifically designed for radial artery stent placement.

[0034] Figure 13 This is a schematic diagram of a catheter specifically designed for deploying vertebral artery stents via the radial artery approach, with the right side of the catheter entering the left vertebral artery.

[0035] Figure 14 This is a schematic diagram of a pneumatic tube for a access catheter specifically designed for deploying a vertebral artery stent via the radial artery approach.

[0036] Figure 15 This is a schematic diagram of the cross-section of a pneumatic tube for a catheter specifically designed for the deployment of a vertebral artery stent via the radial artery approach.

[0037] In the diagram: 1. Adjustment tube; 11. Distal straight tube; 111. Starting position line; 112. Ending position line; 12. Spring tube; 13. Proximal straight tube; 131. Indicator scale line; 14. Air pressure tube; 15. Inflation cavity; 2. Body tube; 21. Primary coating; 211. Secondary coating; 22. Primary outer tube; 221. Secondary outer tube; 23. Circular cavity; 24. Primary inner tube; 241. Secondary inner tube; 25. Beveled end. Detailed Implementation

[0038] Example 1

[0039] Please see Figures 1-15 As shown, a catheter specifically designed for vertebral artery stent placement via the radial artery approach includes a catheter comprising an adjustment catheter 1 and a main body catheter 2, coaxially connected. The main body catheter 2 comprises a proximal catheter and a distal catheter. The proximal catheter includes a primary coating 21, a primary outer tube 22, an annular cavity 23, and a primary inner tube 24. The primary outer tube 22 is fitted over the primary inner tube 24. The annular cavity 23 is located between the inner wall of the primary outer tube 22 and the outer wall of the primary inner tube 24. The adjustment catheter 1 is positioned within the annular cavity 23. The primary coating 21 is coated over the outer wall of the primary outer tube 22. The distal catheter includes a secondary coating 211, a secondary outer tube 221, a secondary inner tube 241, and a beveled tip 25. The secondary outer tube 221 is fitted over the proximal catheter. The secondary inner tube 241 is connected to the primary outer tube 22 on the outer wall of the secondary outer tube 241, and the secondary outer tube 221 is connected to the primary inner tube 24. The secondary coating 211 is coated on the outer wall of the secondary outer tube 221. The beveled tip 25 is located at the end of the distal catheter away from the proximal catheter. The adjusting catheter 1 includes a distal straight tube 11, a spring tube 12, and a proximal straight tube 13. The spring tube 12 is welded between the distal straight tube 11 and the proximal straight tube 13. Since the distal catheter does not have a circular lumen 23 and the adjusting catheter 1 cannot be inserted inside, the overall hardness of the distal catheter can be half that of the proximal catheter. Furthermore, the outer diameter of the distal catheter tip gradually decreases, resulting in a smooth tip. The distal catheter is relatively soft, and the smooth tip can reduce damage to blood vessels.

[0040] refer to Figure 2 As shown, the proximal catheter is the L0 position, and the remaining part is the distal catheter. The distal catheter and the proximal catheter adopt a transition radius design. The outer diameter of the distal catheter is smaller than the radius of the proximal catheter. The outer diameter of the distal catheter gradually decreases from the proximal end to the distal end, and the minimum outer diameter is 2 / 3 of the maximum outer diameter.

[0041] refer to Figure 4 As shown, L3 is the bending length, L4 is the length of the flexible tip design, and L5 is the bending length. This size design can better adapt to complex vertebral artery vessels and has a certain curvature, which can realize multiple entry methods of the main body catheter.

[0042] L3 = 7cm, L4 has a length range of 3 to 3.5cm, and L5 = 3cm.

[0043] refer to Figure 6 As shown, a starting position line 111 and an ending position line 112 are provided on the distal straight pipe 11, and L1 is the starting and ending distance. The purpose of setting the starting position line 111 and the ending position line 112 is to define the adjustable area position of the regulating conduit 1.

[0044] L1 = 4cm.

[0045] refer to Figure 7 As shown, the near-end straight tube 13 is provided with an indicator scale line 131, and there are multiple indicator scale lines 131. The multiple indicator scale lines 131 are provided to facilitate user operation.

[0046] L2 is the distance between multiple indicator scale lines 131, L2 = 4~8cm.

[0047] refer to Figure 3 and Figure 10 As shown, the primary coating 21 is a hydrophilic coating, and the primary coating 21 is made of one or a mixture of materials such as PVP, polyurethane, acrylate, hydrogel, and PEG-based materials. It can reduce the friction coefficient of the outer surface of the main catheter 2 and improve the permeability of the main catheter 2 in blood vessels. The secondary coating 211 contains a material with imaging properties, such as one or a mixture of materials such as platinum-iridium, tungsten, bismuth oxychloride, and barium sulfate, so that the distal end of the main catheter 2 can be visualized in blood vessels, and the position of the distal end of the main catheter 2 can be viewed in real time.

[0048] refer to Figures 5-7 As shown, the regulating catheter 1 includes a distal straight tube 11, a spring tube 12, and a proximal straight tube 13. The spring tube 12 is welded between the distal straight tube 11 and the proximal straight tube 13. The distal straight tube 11, the spring tube 12, and the proximal straight tube 13 are coaxially arranged, and the outer diameter and inner diameter of the distal straight tube 11, the spring tube 12, and the proximal straight tube 13 are equal. The distal straight tube 11, the spring tube 12, and the proximal straight tube 13 are made of the same metal material, such as stainless steel, nickel-titanium alloy, titanium alloy, niobium-titanium alloy, or platinum-nickel alloy. Under the action of the proximal straight tube 13, the spring tube 12 and the distal straight tube 11 are inserted into the annular cavity 23 of the main catheter 2.

[0049] Example 2

[0050] refer to Figure 14 and Figure 15As shown, the regulating catheter 1 includes a distal straight tube 11, a pneumatic tube 14, and a proximal straight tube 13. The pneumatic tube 14 is bonded between the distal straight tube 11 and the proximal straight tube 13. The pneumatic tube 14 is made of medical silicone rubber. An inflation cavity 15 is opened in the middle of the wall of the pneumatic tube 14, and the inflation cavity 15 is filled with air. The distal straight tube 11, the pneumatic tube 14, and the proximal straight tube 13 are coaxially arranged, and the outer diameter and inner diameter of the distal straight tube 11, the pneumatic tube 14, and the proximal straight tube 13 are equal. The distal straight tube 11 and the proximal straight tube 13 are made of the same metal material, such as stainless steel, nickel-titanium alloy, titanium alloy, niobium-titanium alloy, or platinum-nickel alloy. Under the action of the proximal straight tube 13, the pneumatic tube 14 and the distal straight tube 11 are inserted into the annular cavity 23 of the main catheter 2.

[0051] Working principle: The adjusting catheter 1 is inserted into the annular cavity 23 of the main catheter 2. The starting position line 111 of the distal straight tube 11 in the adjusting catheter 1 is aligned synchronously with the starting bending position in the distal arc of the main catheter 2. The starting indicator line 131 of the proximal straight tube 13 of the adjusting catheter 1 is aligned with the end face of the proximal catheter of the main catheter 2. At this time, the maximum bending angle of the distal catheter of the main catheter 2 is as follows: Figure 8 As shown, the bending angle is a1;

[0052] When it is necessary to adjust the bending angle of the distal catheter of the main catheter 2, the user pushes the proximal straight tube 13 of the adjusting catheter 1 distally along the axis of the main catheter 2. This causes the distal straight tube 11 to move distally within the annular cavity 23 of the main catheter 2. Due to the inflexible nature of the distal straight tube 11, the arc of the main catheter 2, which is filled with the distal straight tube 11, begins to change from a bent state to a non-bent state, thereby changing the bending angle of the distal catheter of the main catheter 2. At this time, the bending angle of the distal catheter of the main catheter 2 can be flexibly adjusted through the indicator scale 131 of the proximal straight tube 13. When the indicator scale 131 of the proximal straight tube 13 of the adjusting catheter 1 is aligned with the end face of the proximal catheter of the main catheter 2, the termination position line 112 of the distal straight tube 11 in the adjusting catheter 1 is aligned with the starting bending position in the distal arc of the main catheter 2. At this time, the minimum bending angle of the distal catheter of the main catheter 2 is as follows: Figure 9 As shown, the bending angle is a2;

[0053] This catheter allows for adjustment of the bending angle of the distal catheter of the main body catheter 2 within the range of a1 to a2. Furthermore, by adjusting the alignment of the indicator scale line 131 of the proximal straight tube 13 of the catheter 1, the bending angle of the distal catheter of the main body catheter 2 can be flexibly adjusted. The distal catheter of the main body catheter 2 can be visualized in real time within the blood vessel through imaging, enabling it to adapt to more complex and rugged blood vessels, reducing operational difficulty, improving surgical efficiency, and reducing damage to blood vessels.

[0054] Access method for ipsilateral blood vessels: such as Figure 11 As shown, the catheter enters the left vertebral artery via the left subclavian artery; as Figure 12 As shown, the catheter enters the right vertebral artery via the right subclavian artery;

[0055] Access methods for contralateral blood vessels: such as Figure 13 As shown, the catheter can also enter the left vertebral artery via the right subclavian artery, or enter the right vertebral artery via the left subclavian artery.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A catheter specifically designed for deploying a vertebral artery stent via a radial artery approach, comprising the catheter, characterized in that, The catheter includes an adjustment catheter (1) and a main catheter (2), which are coaxially connected. The main catheter (2) includes a proximal catheter and a distal catheter. The proximal catheter includes a primary coating (21), a primary outer tube (22), an annular cavity (23), and a primary inner tube (24). The primary outer tube (22) is sleeved outside the primary inner tube (24). The annular cavity (23) is located between the inner wall of the primary outer tube (22) and the outer wall of the primary inner tube (24). The adjustment catheter (1) is located within the annular cavity (23). A primary coating (21) is applied to the outer wall of the primary outer tube (22). The distal conduit includes a secondary coating (211), a secondary outer tube (221), a secondary inner tube (241), and a beveled end (25). The secondary outer tube (221) is fitted onto the outer wall of the secondary inner tube (241). The secondary outer tube (221) is connected to the primary outer tube (22). The secondary inner tube (241) is connected to the primary inner tube (24). The secondary coating (211) is applied to the outer wall of the secondary outer tube (221). The beveled end (25) is located at the end of the distal conduit away from the proximal conduit.

2. The access catheter for deploying a vertebral artery stent via the radial artery approach according to claim 1, characterized in that: The proximal catheter is the L0 position, and the remaining part is the distal catheter. The distal catheter and the proximal catheter adopt a transition radius design. The outer diameter of the distal catheter is smaller than the radius of the proximal catheter. The outer diameter of the distal catheter gradually decreases from the proximal end to the distal end, and the minimum outer diameter is 2 / 3 of the maximum outer diameter.

3. The access catheter for deploying a vertebral artery stent via a radial artery approach according to claim 1, characterized in that: L3 is the turning length, L4 is the length of the flexible head design, and L5 is the bending length; L3 = 7cm, L4's length range is 3~3.5cm, and L5 = 3cm.

4. The access catheter for deploying a vertebral artery stent via a radial artery approach according to claim 1, characterized in that: The distal straight pipe (11) is provided with a starting position line (111) and an ending position line (112), and L1 is the starting and ending distance; L1 = 4cm.

5. A catheter for deploying a vertebral artery stent via a radial artery approach according to claim 1, characterized in that: The proximal straight tube (13) is provided with an indicator scale line (131), and there are multiple indicator scale lines (131); L2 is the distance between multiple indicator scale lines (131), L2 = 4~8cm.

6. The access catheter for deploying a vertebral artery stent via a radial artery approach according to claim 1, characterized in that: The primary coating (21) is a hydrophilic coating. The primary coating (21) is made of one or a mixture of materials such as PVP, polyurethane, acrylate, hydrogel, and PEG. The secondary coating (211) contains a material with developing properties, such as one or a mixture of materials such as platinum-iridium, tungsten, bismuth oxychloride, and barium sulfate.

7. A catheter for deploying a vertebral artery stent via a radial artery approach according to claim 1, characterized in that: The regulating conduit (1) includes a distal straight tube (11), a spring tube (12), and a proximal straight tube (13). The spring tube (12) is welded between the distal straight tube (11) and the proximal straight tube (13). The distal straight tube (11), the spring tube (12), and the proximal straight tube (13) are coaxially arranged, and the outer diameter and inner diameter of the distal straight tube (11), the spring tube (12), and the proximal straight tube (13) are equal. The distal straight tube (11), the spring tube (12), and the proximal straight tube (13) are made of the same metal material, such as stainless steel, nickel-titanium alloy, titanium alloy, niobium-titanium alloy, or platinum-nickel alloy.

8. A catheter for deploying a vertebral artery stent via a radial artery approach according to claim 1, characterized in that: The regulating catheter (1) includes a distal straight tube (11), a pneumatic tube (14), and a proximal straight tube (13). The pneumatic tube (14) is bonded between the distal straight tube (11) and the proximal straight tube (13). The pneumatic tube (14) is made of medical silicone rubber. An inflation cavity (15) is opened in the middle of the tube wall of the pneumatic tube (14). The inflation cavity (15) is filled with air. The distal straight tube (11), the pneumatic tube (14), and the proximal straight tube (13) are coaxially arranged. The outer diameter and inner diameter of the distal straight tube (11), the pneumatic tube (14), and the proximal straight tube (13) are equal. The distal straight tube (11) and the proximal straight tube (13) are made of the same metal material, such as stainless steel, nickel-titanium alloy, titanium alloy, niobium-titanium alloy, or platinum-nickel alloy.

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