Balloon catheter and interventional therapy system

Abstract

The utility model relates to the technical field of medical instruments, and discloses a balloon catheter and an interventional therapy system. The balloon catheter comprises a catheter assembly, a balloon and a pushing assembly. The catheter assembly comprises an outer tube and an inner tube, the inner tube is provided with a guide passage, and a gap between the outer tube and the inner tube forms an expansion medium channel; the balloon is connected to the tail end of the outer tube, the inner tube penetrates through the balloon and extends to the far end of the balloon, a through hole is formed in the far end of the balloon, and the through hole is communicated with the guide channel; the pushing assembly comprises a hypotube and a core wire, the hypotube is connected with the outer tube, the near end of the core wire is connected with the hypotube, the far end of the core wire penetrates through the expansion medium channel and extends to the near end of the balloon, and the far end of the core wire is fixedly connected with the inner tube and the outer tube; or the far end of the core wire penetrates through the expansion medium channel and extends to the far end of the balloon, and the far end of the core wire is fixedly connected with the far end of the inner tube and the far end of the balloon. According to the balloon catheter, the force transmission efficiency of the pushing assembly can be improved, and the pushing force of the far end of the balloon catheter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a balloon catheter and an interventional treatment system. Background Art

[0002] With the development of social economy, people's lifestyle has undergone profound changes, especially with the aging of the population and the acceleration of urbanization. The prevalence trend of cardiovascular disease risk factors in China is obvious, resulting in a continuous increase in the number of cardiovascular disease cases. Currently, the total number of PCI surgeries in China is climbing year by year.

[0003] Percutaneous coronary intervention (PCI) has gradually become the mainstream method for treating coronary heart disease in the past 20 years due to its low trauma and good effect. At present, the PCI surgical process mainly includes: lesion diagnosis, lesion opening, balloon pre-dilatation, stent implantation and post-dilatation in the stent. Among them, balloon pre-dilatation and post-dilatation in the stent require the use of balloon catheters, which are indispensable auxiliary treatment devices for stent implantation. At the same time, balloon catheters can also be used for simple stenotic lesions. However, in PCI surgery, when facing the expansion of some severe stenotic lesions such as tortuous and atherosclerotic arterial stenoses, the distal end of the existing balloon catheter is made of nylon material, so the pushing force transmitted from the push rod to the distal end of the balloon catheter is very small, resulting in the inability of the distal end of the balloon catheter to pass through the target lesion site smoothly due to insufficient pushing performance, thereby reducing the surgical success rate of such stenotic lesions. Utility Model Content

[0004] In view of this, the utility model provides a balloon catheter and an interventional treatment system to solve the problem of poor pushing performance of the balloon catheter.

[0005] In the first aspect, the utility model provides a balloon catheter, including a catheter assembly, a balloon and a push assembly. The catheter assembly includes a sleeved outer tube and an inner tube, the inner tube has a guide passage, and the gap between the outer tube and the inner tube constitutes an expansion medium channel; the balloon is connected to the end of the outer tube, the inner tube passes through the balloon and extends to the distal end of the balloon, the distal end of the balloon is provided with a through hole, and the through hole is connected to the guide passage; the push assembly includes a hypotube and a core wire, the hypotube is connected to the outer tube, the proximal end of the core wire is connected to the hypotube, the distal end of the core wire passes through the expansion medium channel and extends to the proximal end of the balloon, and the distal end of the core wire is fixedly connected to the inner tube and the outer tube; or, the distal end of the core wire passes through the expansion medium channel and extends to the distal end of the balloon, and the distal end of the core wire is fixedly connected to the distal end of the inner tube and the balloon.

[0006] Beneficial effects: The balloon catheter provided by the utility model is a rapid exchange catheter with high pushing performance, wherein the inner tube, the outer tube and the pushing assembly are the main conveying parts of the balloon catheter. The balloon catheter provided by the utility model embodiment can improve the force transmission efficiency of the pushing assembly by extending the core wire of the pushing assembly to the distal end of the balloon catheter and fixing the distal end of the core wire at the proximal or distal end of the balloon, thereby improving the pushing force of the distal end of the balloon catheter, making it easier for the balloon catheter to pass through tortuous, severe atherosclerotic stenosis lesions, and even long-segment occluded vascular lesions, thereby improving the success rate of the operation.

[0007] In an optional embodiment, a wire guide hole is provided on the side wall of the outer tube, and the wire guide hole is communicated with the guide passage.

[0008] In an optional embodiment, the distal end of the hypotube is inserted into the outer tube, and the proximal end of the core wire is connected to the inner wall of the distal end of the hypotube.

[0009] In an optional embodiment, the surface of the balloon and / or the outer tube is provided with a hydrophilic coating.

[0010] In an optional embodiment, it also includes a head tube arranged at the distal end of the balloon, the head tube is a conical structure, and the outer diameter of the head tube gradually decreases from near to far, the proximal end of the head tube is connected to the balloon and the inner tube at the same time, and the inner cavity of the head tube is connected to the guide passage.

[0011] In an alternative embodiment, the balloon is used for interventional treatment of coronary vessels.

[0012] In an optional embodiment, the distal end of the core wire is connected to the inner tube and the outer tube by spot welding.

[0013] In an optional embodiment, the proximal end of the pushing assembly is connected to a connector assembly.

[0014] In an optional embodiment, a developing ring is provided inside the balloon, and the developing ring is sleeved on the outside of the inner tube.

[0015] In a second aspect, the utility model also provides an interventional treatment system, comprising a balloon catheter according to any one of the above technical solutions.

[0016] Beneficial effects: Since the interventional treatment system includes a balloon catheter, it has the same effects as the balloon catheter and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a cross-sectional view along the axial direction of a balloon catheter according to an embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a partial enlarged view of part A in

[0020] Figure 3 is Figure 1 a partial enlarged view of part B in

[0021] Figure 4 It is a structural schematic diagram of a pushing assembly;

[0022] Figure 5 is Figure 1 a cross-sectional view along C-C in

[0023] Figure 6 is Figure 1 a cross-sectional view along D-D in

[0024] Figure 7 is Figure 1 a partial enlarged view of part E in

[0025] Explanation of reference numerals:

[0026] 1. Catheter assembly; 11. Outer tube; 111. Guide wire hole; 12. Inner tube; 121. Guiding passage; 13. Dilatation medium channel; 2. Balloon; 3. Pushing assembly; 31. Hypotube; 32. Core wire; 4. Head tube; 5. Connector assembly; 6. Radiopaque ring. Specific embodiments

[0027] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0028] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 7 , to describe the embodiments of the present utility model.

[0029] According to an embodiment of the present utility model, on one hand, a balloon catheter is provided, comprising a catheter component 1, a balloon 2 and a pushing component 3. The catheter assembly 1 includes an outer tube 11 and an inner tube 12, the inner tube 12 has a guide passage 121, and the gap between the outer tube 11 and the inner tube 12 constitutes an expansion medium channel 13; the balloon 2 is connected to the end of the outer tube 11, the inner tube 12 passes through the balloon 2 and extends to the distal end of the balloon 2, and the distal end of the balloon 2 is provided with a through hole, which is connected to the guide passage 121; the pushing assembly 3 includes a sea wave tube 31 and a core wire 32, the sea wave tube 31 is connected to the outer tube 11, the proximal end of the core wire 32 is connected to the sea wave tube 31, the distal end of the core wire 32 passes through the expansion medium channel 13 and extends to the proximal end of the balloon 2, and the distal end of the core wire 32 is fixedly connected to the inner tube 12 and the outer tube 11; or the distal end of the core wire 32 passes through the expansion medium channel 13 and extends to the distal end of the balloon 2, and the distal end of the core wire 32 is fixedly connected to the distal end of the inner tube 12 and the distal end of the balloon 2.

[0030] The balloon catheter provided by the utility model is a rapid exchange catheter with high pushing performance, wherein the inner tube 12, the outer tube 11 and the pushing component 3 are the main conveying parts of the balloon catheter. The balloon catheter provided by the utility model embodiment can improve the force transmission efficiency of the pushing component 3 by extending the core wire 32 of the pushing component 3 to the distal end of the balloon catheter and fixing the distal end of the core wire 32 at the proximal end or distal end of the balloon, thereby improving the pushing force of the distal end of the balloon catheter, making it easier for the balloon catheter to pass through tortuous, severe atherosclerotic stenosis lesions, and even long-segment occluded vascular lesions, thereby improving the success rate of the operation.

[0031] In the related art, the hardness of the inner and outer tubes 11 at the distal end of the balloon catheter is increased to improve the transmission efficiency of the pushing force, that is, by increasing the force at the distal end of the balloon catheter, the product's ability to pass through the blood vessel is improved. However, increasing the hardness of the inner and outer tubes 11 will reduce the tracking ability of the balloon catheter and affect the product's ability to fit into tortuous blood vessels.

[0032] The balloon catheter provided by the embodiment of the utility model is provided with a core wire 32, which extends from the hypotube 31 to the proximal end of the balloon 2, which can not only improve the pushing force of the distal end of the balloon catheter, but also will not reduce the tracking performance of the balloon catheter, thereby ensuring the product's ability to be placed in tortuous blood vessels.

[0033] Specifically, the cross-sectional shape of the core wire 32 is not limited, including a rectangle, a half moon or an ellipse.

[0034] In some embodiments, a guide wire hole 111 is provided on the side wall of the outer tube 11 , and the guide wire hole 111 is connected to the guide passage 121 .

[0035] The guidewire hole 111 is connected to the guide passage 121 through the guidewire hole 111, and the guidewire can be inserted through the guidewire hole 111 and enter the guide passage 121 to perform interventional treatment.

[0036] Specifically, the cavity between the guide wire hole 111 and the distal end of the balloon catheter is the guide passage 121 , and the length of the guide passage 121 is 25 cm±1 cm.

[0037] In some embodiments, the distal end of the hypotube 31 is inserted into the outer tube 11 , and the proximal end of the core wire 32 is connected to the inner wall of the distal end of the hypotube 31 .

[0038] This arrangement can fix the core wire 32 in the expansion medium channel 13, thereby improving the pushing force of the distal end of the balloon catheter, making it easier for the balloon catheter to pass through tortuous, severe atherosclerotic stenosis, and even long-segment occluded vascular lesions, thereby improving the success rate of the operation.

[0039] In some embodiments, the surface of the balloon 2 and / or the outer tube 11 is provided with a hydrophilic coating.

[0040] This arrangement can reduce the frictional resistance of the balloon catheter during the process of pushing it into the blood vessel, and further improve the pushability of the distal end of the balloon catheter.

[0041] In some embodiments, it also includes a head tube 4 arranged at the distal end of the balloon 2. The head tube 4 is a conical structure. The outer diameter of the head tube 4 gradually decreases from near to far. The proximal end of the head tube 4 is connected to the balloon 2 and the inner tube 12 at the same time, and the inner cavity of the head tube 4 is connected to the guide passage 121.

[0042] By providing the tapered head tube 4, the diameter of the head tube 4 gradually increases from far to near, which can further improve the pushability of the distal end of the balloon catheter.

[0043] In some embodiments, the balloon 2 is used for interventional treatment of coronary vessels, and the diameter of the balloon 2 is in the range of 0.75 mm to 5.0 mm, and the length of the balloon 2 is in the range of 6 mm to 30 mm, depending on the specific needs of the operation, such as a balloon with a diameter of 0.75 mm and a length of 6 mm, or a balloon with a diameter of 1.00 mm and a length of 9 mm, or a balloon with a diameter of 5.00 mm and a length of 30 mm.

[0044] The balloon catheter provided by the embodiment of the utility model is suitable for treating coronary blood vessels.

[0045] In some embodiments, the distal end of the core wire 32 is connected to the inner tube 12 and the outer tube 11 by spot welding.

[0046] This arrangement can improve the force transmission efficiency of the pushing component 3, thereby increasing the pushing force at the distal end of the balloon catheter, making it easier for the balloon catheter to pass through tortuous, severe atherosclerotic stenosis lesions, and even long-segment occluded vascular lesions. At the same time, the core wire 32 will not reduce the tracking performance of the balloon catheter, thereby improving the success rate of the operation.

[0047] Since the distal end of the core wire 32 is connected to the inner tube 12 and the outer tube 11 by spot welding, it can not only fixedly connect the core wire 32, the inner tube 12 and the outer tube 11 simultaneously, but also does not affect the passage of the expansion medium.

[0048] In some embodiments, a connector assembly 5 is connected to the proximal end of the pushing assembly 3.

[0049] By providing the connector assembly 5, it is convenient to connect the balloon catheter to other instruments or devices in the access treatment system. Specifically, the connector assembly 5 includes a luer connector.

[0050] In some embodiments, a radiopaque ring 6 is disposed inside the balloon 2, and the radiopaque ring 6 is sleeved outside the inner tube 12.

[0051] By providing the radiopaque ring 6, it is convenient for the operator to position the balloon 2 and improve the success rate of the operation.

[0052] According to an embodiment of the present invention, on the other hand, an interventional treatment system is further provided, which includes the balloon catheter according to any one of the above technical solutions.

[0053] Since the interventional treatment system includes the balloon catheter and has the same effects as the balloon catheter, it will not be described in detail herein.

[0054] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A balloon catheter, characterized in that: include: A catheter assembly (1), the catheter assembly (1) comprising an outer tube (11) and an inner tube (12) which are sleeved together, the inner tube (12) having a guide passage (121), and a gap between the outer tube (11) and the inner tube (12) constituting an expansion medium passage (13); A balloon (2), the balloon (2) being connected to the end of the outer tube (11), the inner tube (12) penetrating the balloon (2) and extending to the distal end of the balloon (2), the distal end of the balloon (2) being provided with a through hole, the through hole being in communication with the guide passage (121); A pushing assembly (3), the pushing assembly (3) comprising a hypotube (31) and a core wire (32), the hypotube (31) being connected to the outer tube (11), and the proximal end of the core wire (32) being connected to the hypotube (31); The distal end of the core wire (32) passes through the expansion medium channel (13) and extends to the proximal end of the balloon (2), and the distal end of the core wire (32) is fixedly connected to the inner tube (12) and the outer tube (11); Alternatively, the distal end of the core wire (32) passes through the expansion medium channel (13) and extends to the distal end of the balloon (2), and the distal end of the core wire (32) is fixedly connected to the distal end of the inner tube (12) and the balloon (2).

2. The balloon catheter according to claim 1, characterized in that: A wire guide hole (111) is provided on the side wall of the outer tube (11), and the wire guide hole (111) is in communication with the guide passage (121).

3. The balloon catheter according to claim 1 or 2, characterized in that: The distal end of the hypotube (31) is inserted into the outer tube (11), and the proximal end of the core wire (32) is connected to the inner wall of the distal end of the hypotube (31).

4. The balloon catheter according to claim 1 or 2, characterized in that: The surface of the balloon (2) and / or the outer tube (11) is provided with a hydrophilic coating.

5. The balloon catheter according to claim 1 or 2, characterized in that: It also comprises a head tube (4) arranged at the distal end of the balloon (2); the head tube (4) is a conical structure, and the outer diameter of the head tube (4) gradually decreases from near to far; the proximal end of the head tube (4) is connected to the balloon (2) and the inner tube (12) at the same time, and the inner cavity of the head tube (4) is in communication with the guide passage (121).

6. The balloon catheter according to claim 1 or 2, characterized in that: The balloon (2) is used for interventional treatment of coronary blood vessels.

7. The balloon catheter according to claim 1 or 2, characterized in that: The distal end of the core wire (32) is connected to the inner tube (12) and the outer tube (11) by spot welding.

8. The balloon catheter according to claim 1 or 2, characterized in that: The proximal end of the pushing component (3) is connected to a joint component (5).

9. The balloon catheter according to claim 1 or 2, characterized in that: A developing ring (6) is arranged inside the balloon (2), and the developing ring (6) is sleeved on the outside of the inner tube (12).

10. An interventional therapy system, characterized in that: A balloon catheter comprising the method according to any one of claims 1 to 9.

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