Intracranial drug balloon catheter

Abstract

The utility model relates to an intracranial drug balloon catheter. The balloon catheter comprises a main catheter body and a plurality of branch catheter bodies, a guide wire opening and an air guide tube opening are formed in the side, away from the branch catheter bodies, of the main catheter body, a guide wire and an air guide tube are inserted into the guide wire opening and the air guide tube opening respectively, and the guide wire and the air guide tube are fixed into the main catheter body and the branch catheter bodies in a penetrating mode respectively. The air guide pipe is communicated with balloons through a plurality of branch air pipes, and the balloons are arranged on the outer walls of the branch air pipes. According to the balloon catheter, the blocking blocks are arranged to block the gas-distributing pipe so as to cut off communication between the gas-distributing pipe and the balloons, the sleeve and the connecting rope are arranged, so that the multiple sets of blocking blocks connected to the connecting rope can be sequentially pulled out of the gas-distributing pipe from the starting end, and the purpose of expanding the number of the balloons is achieved by controlling the moving distance of the sleeve; the problem that an existing catheter cannot adjust the number of expanded balloons according to the length of the lesion position of a patient is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of balloon catheters, and in particular relates to an intracranial drug balloon catheter. Background Art

[0002] The incidence of intracranial artery stenosis in China is much higher than in other parts of the world. Studies have shown that for patients with symptomatic and severe intracranial artery stenosis, the complications of stent combined with drug therapy are comparable to those of drug therapy alone, which effectively reduces the complications of interventional treatment of intracranial artery stenosis. However, factors such as multiple intracranial artery stenosis and thin / tortuously vascular vessels restrict stent implantation, and restenosis may occur after intervention. Therefore, drug-coated balloons have certain potential advantages.

[0003] After searching, it was found that a Chinese patent document (application number: 202221737149.4) disclosed an intracranial artery conformal multi-columnar balloon expandable stent, including a main catheter and a multi-section branch catheter, wherein a guide wire and an airway tube are respectively inserted into the guide wire opening and the airway tube opening, and the guide wire and the airway tube are respectively passed through and fixed in the main catheter and the branch catheter, and the airway tube is connected to a balloon through a plurality of branch catheters, and the balloon is arranged on the outer wall of the branch catheter, and a stent is arranged on the outer wall of the balloon. Although the intracranial artery conformal multi-columnar balloon expandable stent is provided with a multi-section branch catheter, a balloon and a stent, After the stent expands the artery, the artery can be expanded on the basis of the original shape, retaining the advantage of the complete expansion of the balloon-expandable stent and avoiding the risk of blood vessel rupture or breakage caused by straightening the blood vessel when the balloon is filled, thereby ensuring the effect of restoring blood flow and reducing the short-term re-occlusion rate while improving the safety and applicability of use. However, when using the balloon-expandable stent, all balloons must be expanded at the same time, and the number of balloon expansions cannot be adjusted according to the length of the patient's lesion location. Therefore, when performing surgery on the patient, all balloons can only be expanded, reducing work efficiency and the applicability of the balloon-expandable stent. Utility Model Content

[0004] The purpose of the utility model is to provide a balloon catheter with a simple structure and reasonable design in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] An intracranial drug balloon catheter comprises a main catheter and a multi-section branch catheter, wherein a guide wire port and an airway port are respectively arranged on one side of the main catheter away from the branch catheter, a guide wire and an airway port are respectively inserted into the guide wire port and the airway port, and the guide wire and the airway port are respectively penetrated and fixed in the main catheter and the branch catheter, the airway tubes are respectively connected with balloons through multi-component airways, the balloons are arranged on the outer wall of the branch catheter, the outer wall of the balloons is coated with a drug layer, one end of the airway tube is connected to an inner tube, the outer wall of the inner tube and the inner wall of the airway tube form an annular cavity, the guide wire is inserted in The inside of the inner tube and the outer wall of the inner tube are slidably connected with a sleeve, and a block is arranged inside each group of airway tubes for cutting off the connection between the balloon and the airway tube. The surface of the block is connected with a connecting rope, and one end of the connecting rope is connected to the surface of the sleeve. The end of the sleeve close to the traction end of the guide wire is the starting end. The sleeve is pulled, and the block in the airway tube is pulled out in sequence from the starting end to connect the airway tube and the balloon. The end of the airway tube close to the airway tube opening is bifurcated with a closed end, and the end of the sleeve away from the starting end extends from the closed end to the outside of the airway tube 4, and is connected with a pulling component for pulling the sleeve.

[0007] As a further optimization solution of the utility model, the farther away from the starting end, the longer the connecting rope is.

[0008] As a further optimization solution of the utility model, multiple groups of connecting ropes away from the starting end are wrapped around the surface of the sleeve.

[0009] As a further optimization solution of the utility model, a bump is raised on the surface of the sleeve and is fixedly connected to the connecting rope.

[0010] As a further optimization scheme of the utility model, the pulling assembly includes a connecting block arranged inside the main guide tube, the connecting block is fixedly connected to the sleeve, a sliding groove is provided on the surface of one end of the main guide tube close to the guide wire opening, a pulling plate is slidably connected to the surface of the main guide tube, and one side of the connecting block passes through the sliding groove and is connected to the pulling plate.

[0011] As a further optimization solution of the present invention, the air guide tube further includes a sleeve connection portion, which surrounds the surface of the sleeve and is connected to the closed end.

[0012] As a further optimization solution of the utility model, a plurality of groups of prompt marks are provided on the surface of the main guide tube located on both sides of the slide groove, for prompting the moving length of the sleeve.

[0013] As a further optimization scheme of the utility model, multiple groups of prompt marks are formed by protrusions on the surface of the main duct and are arranged in a linear array. The pulling plate moves from the prompt mark far away from the guide wire opening to the prompt mark close to the guide wire opening, and will pull out the blockages in the air distribution duct one by one.

[0014] The beneficial effects of the utility model are as follows: the utility model is provided with a block to block the airway, thereby isolating the connection between the airway and the balloon, and then by providing a sleeve and a connecting rope, multiple groups of blockages connected to the connecting rope can be pulled out of the airway in sequence from the starting end, and the purpose of expanding the number of balloons is achieved by controlling the moving distance of the sleeve, which effectively solves the problem that the existing catheter cannot adjust the number of balloon expansions according to the length of the patient's lesion location. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an internal cross-sectional view of the overall structure of the utility model;

[0017] Figure 3 This utility model Figure 2 A partial enlarged view of

[0018] Figure 4 This utility model Figure 2 A partial enlarged view of

[0019] Figure 5 This utility model Figure 2 A partial enlarged view of

[0020] Figure 6 This utility model Figure 1 Cross-sectional view at point A in the middle.

[0021] In the figure: 1. main catheter; 2. guide wire; 3. branch catheter; 4. airway tube; 5. branch airway tube; 6. balloon; 7. drug layer; 8. guide wire port; 9. airway tube port; 10. metal mark; 11. sleeve; 12. bump; 13. blocking block; 14. connecting rope; 15. connecting block; 16. pulling plate; 17. slide groove; 18. reminder mark; 19. sleeve joint; 20. inner tube. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] like Figures 1 to 5The partial structure shown is an intracranial drug balloon catheter, comprising a main catheter 1 and a multi-section branch catheter 3, a guide wire port 8 and an airway port 9 are respectively provided on the side of the main catheter 1 away from the branch catheter 3, a guide wire 2 and an airway tube 4 are respectively inserted into the guide wire port 8 and the airway tube port 9, and the guide wire 2 and the airway tube 4 are respectively penetrated and fixed in the main catheter 1 and the branch catheter 3, the airway tube 4 is respectively connected to a balloon 6 through a multi-component airway 5, the balloon 6 is arranged on the outer wall of the branch catheter 3, the outer wall of the balloon 6 is coated with a drug layer 7, one end of the airway tube 4 is connected to an inner tube 20, the outer wall of the inner tube 20 and the inner wall of the airway tube 4 form an annular cavity, the guide wire 2 is inserted into the inner tube Inside the inner tube 20, the outer wall of the inner tube 20 is slidably connected with a sleeve 11, and each group of airway tubes 5 is provided with a block 13 inside to cut off the connection between the balloon 6 and the airway tube 4. The surface of the block 13 is connected with a connecting rope 14, and one end of the connecting rope 14 is connected to the surface of the sleeve 11. The end of the sleeve 11 close to the traction end of the guide wire 2 is the starting end. The sleeve 11 is pulled, and starting from the starting end, the block 13 in the airway tube 5 is pulled out in turn to connect the airway tube 4 and the balloon 6. The end of the airway tube 4 close to the airway tube port 9 is bifurcated with a closed end, and the end of the sleeve 11 away from the starting end extends from the closed end to the outside of the airway tube 4, and is connected with a pulling component for pulling the sleeve 11.

[0024] It should be noted that the diameter of the block 13 can be slightly larger than the diameter of the air distribution tube 5. Since the air distribution tube 5 is a soft pipe, it has a certain tensile strength. Therefore, the block 13 slightly larger than the diameter of the air distribution tube 5 can also be inserted into the air distribution tube 5, and can better cut off the connection between the balloon 6 and the airway 4, so that the block 13 cannot easily fall out of the air distribution tube 5.

[0025] Furthermore, two metal marks 10 are arranged on the outer wall of the guide wire 2, and the two metal marks 10 are respectively arranged on the front side of the branch catheter 3 located at the head end and the rear side of the branch catheter 3 located at the tail end.

[0026] Furthermore, the farther away from the starting end, the longer the connecting rope 14 is.

[0027] Furthermore, a plurality of groups of connecting ropes 14 away from the starting end are wrapped around the surface of the sleeve 11 .

[0028] It should be noted that since the connecting rope 14 away from the starting end is gradually longer than the connecting rope 14 at the starting end, in order to prevent the connecting rope 14 away from the starting end from being entangled due to excessive length and making the connecting rope 14 shorter, the connecting rope 14 is wrapped around the surface of the sleeve 11.

[0029] It should be further explained that the number of connecting ropes 14 wrapped around the surface of the sleeve 11 can be set according to actual conditions.

[0030] Furthermore, a bump 12 is raised on the surface of the sleeve 11 and is fixedly connected to the connecting rope 14 .

[0031] like Figure 5 and Figure 6 The partial structure shown, the pulling assembly includes a connecting block 15 arranged inside the main guide tube 1, the connecting block 15 is fixedly connected to the sleeve 11, a slide groove 17 is provided on the surface of the main guide tube 1 near the guide wire opening 8, a pulling plate 16 is slidably connected to the surface of the main guide tube 1, and one side of the connecting block 15 passes through the slide groove 17 and is connected to the pulling plate 16.

[0032] It should be noted that the pulling plate 16 is annularly sleeved on the surface of the main conduit 1 . The provision of the annular pulling plate 16 makes it more convenient for operators to drive the sleeve 11 to move through the pulling plate 16 .

[0033] Furthermore, the air guide tube 4 further includes a sleeve portion 19 , which surrounds the surface of the sleeve 11 and is connected to the closed end.

[0034] It should be noted that the connection between the sleeve 11 and the air duct 4 is relatively tight, and the provision of the sleeve connection portion 19 increases the contact area between the sleeve 11 and the air duct 4 , thereby enhancing the sealing of the connection between the sleeve 11 and the air duct 4 .

[0035] Furthermore, a plurality of groups of prompt marks 18 are provided on the surface of the main conduit 1 on both sides of the slide groove 17 to prompt the moving length of the sleeve 11 .

[0036] Furthermore, multiple groups of prompt marks 18 are formed by protrusions on the surface of the main guide tube 1 and are arranged in a linear array. The pulling plate 16 moves from the prompt mark 18 far away from the guide wire opening 8 to the prompt mark 18 close to the guide wire opening 8, and the blocks 13 in the air distribution pipe 5 will be pulled out one by one.

[0037] It should be noted that when the number of blocking blocks 13 is n groups, the number of prompt marks 18 is n+1 groups. When the pulling plate 16 moves from one end close to the prompt marks 18 to between any two groups of prompt marks 18, the pulling plate 16 passes over several groups of marks, which means that starting from the starting end, the same number of blocking blocks 13 as the number of prompt marks 18 that have been passed over are pulled out from the gas distribution pipe 5 in sequence.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. An intracranial drug balloon catheter, comprising a main catheter (1) and a multi-section branch catheter (3), wherein a guide wire port (8) and an airway port (9) are respectively arranged on the side of the main catheter (1) away from the branch catheter (3), wherein a guide wire (2) and an airway tube (4) are respectively inserted into the inside of the guide wire port (8) and the airway tube port (9), and the guide wire (2) and the airway tube (4) are respectively passed through and fixed to the inside of the main catheter (1) and the branch catheter (3), wherein the airway tube (4) is respectively connected to a balloon (6) through a multi-component airway (5), wherein the balloon (6) is arranged on the outer wall of the branch catheter (3), and a drug layer (7) is coated on the outer wall of the balloon (6), wherein the invention is characterized in that: One end of the airway tube (4) is connected to an inner tube (20), the outer wall of the inner tube (20) and the inner wall of the airway tube (4) form an annular cavity, the guide wire (2) is inserted into the inner tube (20), the outer wall of the inner tube (20) is slidably connected to a sleeve (11), each group of airways (5) is provided with a block (13) for isolating the connection between the balloon (6) and the airway tube (4), the surface of the block (13) is connected to a connecting rope (14), one end of the connecting rope (14) is connected to the inner wall of the airway tube (4), and the inner wall of the inner tube (20) is connected to the inner wall of the airway tube (4). The sleeve (11) is connected to the surface of the sleeve (11), and the end of the sleeve (11) close to the traction end of the guide wire (2) is the starting end. The sleeve (11) is pulled, and the block (13) in the air distribution tube (5) is pulled out in sequence starting from the starting end, so as to connect the airway tube (4) and the balloon (6). The end of the airway tube (4) close to the airway tube opening (9) is bifurcated with a closed end. The end of the sleeve (11) away from the starting end extends from the closed end to the outside of the airway tube (4), and is connected to a pulling component for pulling the sleeve (11).

2. An intracranial drug balloon catheter according to claim 1, characterized in that: The further away from the starting end, the longer the connecting rope (14) is.

3. An intracranial drug balloon catheter according to claim 2, characterized in that: A plurality of groups of connecting ropes (14) away from the starting end are wrapped around the surface of the sleeve (11).

4. An intracranial drug balloon catheter according to claim 1, characterized in that: The surface of the sleeve (11) is provided with a protrusion (12) which is fixedly connected to the connecting rope (14).

5. An intracranial drug balloon catheter according to claim 1, characterized in that: The pulling assembly comprises a connecting block (15) arranged inside the main guide tube (1), the connecting block (15) being fixedly connected to the sleeve (11), a sliding groove (17) being provided on the surface of one end of the main guide tube (1) close to the guide wire opening (8), a pulling plate (16) being slidably connected to the surface of the main guide tube (1), and one side of the connecting block (15) passing through the sliding groove (17) and connected to the pulling plate (16).

6. An intracranial drug balloon catheter according to claim 1, characterized in that: The air guide tube (4) further comprises a sleeve connection portion (19), wherein the sleeve connection portion (19) surrounds the surface of the sleeve (11) and is connected to the closed end.

7. An intracranial drug balloon catheter according to claim 5, characterized in that: The surface of the main conduit (1) located on both sides of the slide groove (17) is provided with a plurality of groups of prompt marks (18) for prompting the moving length of the sleeve (11).

8. An intracranial drug balloon catheter according to claim 7, characterized in that: A plurality of groups of the prompt marks (18) are formed by protrusions on the surface of the main guide tube (1) and are arranged in a linear array. The pulling plate (16) moves from the prompt mark (18) far away from the guide wire opening (8) to the prompt mark (18) close to the guide wire opening (8), and will pull out the blockages (13) in the gas distribution tube (5) in turn.

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