Balloon dilatation catheter

Abstract

The embodiment of the invention provides a balloon dilatation catheter. The balloon dilatation catheter comprises an inner tube, a head end, a balloon structure and an outer tube, wherein the inner tube is sequentially sleeved with the head end, the balloon structure and the outer tube in the axial direction of the inner tube; the head end is connected with the inner tube; the balloon structure comprises a balloon and a plurality of tube bodies arranged around the surface of the balloon, one end of the balloon is communicated with the head end, the other end of the balloon is communicated with the outer tube, and the extending direction of the tube bodies is parallel to the axial direction of the inner tube. Therefore, the plurality of tube bodies are arranged on the surface of the balloon, when catheter aortic valve replacement is carried out, blood can flow through the plurality of tube bodies, the problem of blood blockage cannot be caused, and the success rate of the catheter aortic valve replacement can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a balloon dilatation catheter. Background Art

[0002] With the development of transcatheter valve technology, patients who are elderly and at high risk for conventional surgical valve replacement have begun to undergo less invasive transcatheter aortic valve replacement. Among them, transcatheter aortic valve replacement can intervene in the valve through balloon expansion. Specifically, the stenotic aortic valve is expanded by balloon expansion to provide an effective channel for the entry of the catheter during transcatheter aortic valve replacement, thereby expanding the valve and promoting blood circulation. However, during the balloon expansion process, the balloon expansion can easily cause acute vascular occlusion and blood flow blockage. In severe cases, serious complications such as ventricular fibrillation and cardiac arrest may occur, making transcatheter aortic valve replacement difficult to operate. Summary of the Invention

[0003] The embodiment of the present application provides a balloon dilatation catheter that can solve the problem of high difficulty in performing catheter aortic valve replacement.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] The present application provides a balloon dilatation catheter, comprising: an inner tube, a head end, a balloon structure, and an outer tube sequentially sleeved on the inner tube along the axial direction of the inner tube;

[0006] The head end is connected to the inner tube;

[0007] The balloon structure includes a balloon and multiple tubes arranged around the surface of the balloon, one end of the balloon is connected to the head end, and the other end of the balloon is connected to the outer tube, and the extension direction of the tube is parallel to the axial direction of the inner tube.

[0008] Optionally, the balloon includes a cylindrical balloon body and conical balloon bodies arranged at two ends of the cylindrical balloon body;

[0009] The plurality of tubes are evenly spaced and arranged on the cylindrical capsule, and the lengths of the plurality of tubes match the length of the cylindrical capsule.

[0010] Optionally, the cross-sectional diameter of the tube body is smaller than the cross-sectional diameter of the cylindrical capsule.

[0011] Optionally, two developing areas are spaced apart on the inner tube, and the distance between the two developing areas is equal to the length of the cylindrical capsule.

[0012] Optionally, the inner tube includes an inner layer tube, a middle layer tube and an outer layer tube which are stacked and sleeved in sequence.

[0013] Optionally, the balloon dilatation catheter further comprises a dispersing tube and a connecting seat connected thereto, and the connecting seat comprises a first port;

[0014] The dispersion tube is sleeved on the inner tube, and the first end of the dispersion tube is connected to the outer tube, and the second end of the dispersion tube is connected to the first port of the connecting seat.

[0015] Optionally, the connecting seat further includes a guidewire port, which is arranged opposite to the first port and is used for inserting a guidewire.

[0016] Optionally, the connecting seat further includes a filling port, the filling port and the guide wire port form a first preset angle, the filling port is used to input liquid, and the first preset angle is greater than 0 degrees and less than 90 degrees.

[0017] Optionally, the tube body is made of polytetrafluoroethylene material.

[0018] Optionally, the developing area is a developing ring forged on the inner tube.

[0019] In an embodiment of the present application, a balloon dilatation catheter includes an inner tube and a head end, a balloon structure, and an outer tube, which are sequentially sleeved on the inner tube along the axial direction of the inner tube; the head end is connected to the inner tube; the balloon structure includes a balloon and multiple tubes arranged around the surface of the balloon, one end of the balloon is connected to the head end, and the other end of the balloon is connected to the outer tube, and the extension direction of the tubes is parallel to the axial direction of the inner tube. In this way, by arranging multiple tubes on the surface of the balloon, blood can flow through the multiple tubes during catheter aortic valve replacement, without causing blood blockage problems, and thus improving the success rate of catheter aortic valve replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a balloon dilatation catheter provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of the balloon provided in an embodiment of the present application;

[0022] Figure 3 A schematic structural diagram of the balloon structure provided in an embodiment of the present application;

[0023] Figure 4 Schematic diagram of the partial structure of the balloon dilatation catheter provided in the embodiment of the present application Figure 1 ;

[0024] Figure 5 Schematic diagram of the partial structure of the balloon dilatation catheter provided in the embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "an" and similar words do not indicate a quantity limitation, but rather indicate the existence of at least one. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0027] The balloon dilatation catheter proposed in the application embodiment is further described below with reference to the accompanying drawings.

[0028] See also Figures 1 to 5 , FIG is a schematic diagram of the relevant structure of the balloon dilatation catheter provided in an embodiment of the present application. As shown in the figure, the balloon dilatation catheter includes: an inner tube 10 and a head end 20, a balloon structure 30, and an outer tube 40 sequentially sleeved on the inner tube 10 along the axial direction of the inner tube 10;

[0029] The head end 20 is connected to the inner tube 10;

[0030] The balloon structure 30 includes a balloon 31 and a plurality of tube bodies 32 arranged around the surface of the balloon 31. One end of the balloon 31 is connected to the head end 20, and the other end of the balloon 31 is connected to the outer tube 40. The extension direction of the tube body 32 is parallel to the axial direction of the inner tube 10.

[0031] It should be understood that the head end 20 and the inner tube 10 can be connected by bonding.

[0032] In the embodiment of the present application, the tip 20 has a tapered structure, wherein the tip of the tapered structure is located on the side away from the balloon 31 structure 30. This facilitates the smooth passage of the balloon 31 dilation catheter through blood vessels and heart valves. In an alternative embodiment, the tip 20 can also be made of a soft material to reduce tissue damage.

[0033] It should be understood that the balloon 31 can be made of a polymer material, which has good elasticity and pressure resistance. Several cylindrical structures (i.e., tube body 32) are bonded to the outer surface of the balloon 31. The hollow structure of the cylindrical structure can facilitate blood flow through.

[0034] The material of the tube body 32 can be polytetrafluoroethylene. Polytetrafluoroethylene has the characteristics of stable chemical properties, high lubricity and no adhesion, and good biocompatibility, which can extend the service life of the balloon 31 dilation catheter.

[0035] In practice, multiple tubes 32 are evenly wrapped around the outer surface of the balloon 31 in an annular structure, surrounding the balloon 31. The outer surface of the annular structure can form a cylindrical outer surface. When the balloon 31 is inflated, the balloon 31 expands, increasing the diameter of the structure, thereby expanding the valve stent and completing the surgical operation.

[0036] In the embodiment of the present application, the balloon 31 dilatation catheter includes an inner tube 10 and a head end 20, a balloon 31 structure 30, and an outer tube 40, which are sequentially sleeved on the inner tube 10 along the axial direction of the inner tube 10. The head end 20 is connected to the inner tube 10. The balloon 31 structure 30 includes a balloon 31 and multiple tubes 32 arranged around the surface of the balloon 31. One end of the balloon 31 is connected to the head end 20, and the other end of the balloon 31 is connected to the outer tube 40. The extension direction of the tubes 32 is parallel to the axial direction of the inner tube 10. In this way, by arranging multiple tubes 32 on the surface of the balloon 31, blood can flow through the multiple tubes 32 during catheter aortic valve replacement, without causing blood blockage problems, and thus improving the success rate of catheter aortic valve replacement.

[0037] Optionally, the balloon 31 includes a cylindrical balloon body and conical balloon bodies arranged at two ends of the cylindrical balloon body;

[0038] The plurality of tubes 32 are evenly spaced apart and disposed on the cylindrical capsule, and the length of the plurality of tubes 32 matches the length of the cylindrical capsule.

[0039] It should be understood that the cylindrical balloon and the tapered balloons disposed oppositely at either end of the cylindrical balloon form a balloon 31 structure 30. Multiple tubes 32 are evenly disposed on the outer surface of the cylindrical balloon, parallel to the inner tube 10. Thus, when the balloon 31 dilates the catheter and is placed within a blood vessel, the tubes 32 abut against the inner wall of the vessel, allowing blood within the vessel to pass through the tubes 32 without causing vascular occlusion.

[0040] In an optional embodiment, the length of the plurality of tubes 32 is equal to the length of the cylindrical capsule. Thus, by bonding the plurality of tubes 32 having the same length as the cylindrical capsule to the outer surface of the cylindrical capsule, the connection stability between the tubes 32 and the balloon 31 is improved.

[0041] In another optional embodiment, the length of the multiple tubes 32 can be slightly less than that of the cylindrical capsule. Specifically, the two ends of the multiple tubes 32 can overlap with the extension direction of the tapered openings of the two tapered capsules, so as to reduce the damage of the tubes to the tissue.

[0042] Optionally, the cross-sectional diameter of the tube body 32 is smaller than the cross-sectional diameter of the cylindrical capsule.

[0043] In this embodiment, by setting the cross-sectional diameter of the tube body 32 to be smaller than the cross-sectional diameter of the cylindrical sac, during the catheter aortic valve replacement surgery, a small amount of blood also flows slowly through the tube body 32, allowing the blood to pass smoothly. At the same time, it can also ensure that the amount of bleeding is small and will not cause harm to the patient himself.

[0044] Optionally, two developing areas are spaced apart on the inner tube 10 , and the distance between the two developing areas is equal to the length of the cylindrical capsule.

[0045] It should be understood that the above-mentioned development area may be a positioning marker ring used as an X-ray development marker of the distal working area during interventional treatment.

[0046] In an optional embodiment, the developing area is a developing ring forged on the inner tube 10 .

[0047] Optionally, the inner tube 10 includes an inner layer tube, a middle layer tube and an outer layer tube which are stacked and sleeved in sequence.

[0048] It should be understood that in the embodiment of the present application, the inner tube 10 may be composed of a three-layer structure, including an inner layer, a middle layer, and an outer layer. The inner layer is smooth to facilitate the passage of a guidewire; the middle layer provides support and strength; and the outer layer is made of a special material to improve the lubricity and anti-thrombotic properties of the catheter.

[0049] In an optional embodiment, the outer tube 40 may be made of polyether block amide, which has a certain support property and can provide protection.

[0050] Optionally, the balloon dilatation catheter further comprises a dispersing tube 50 and a connecting seat 60 connected thereto, wherein the connecting seat 60 comprises a first port;

[0051] The dispersion tube 50 is sleeved on the inner tube 10 , and a first end of the dispersion tube 50 is connected to the outer tube 40 , and a second end of the dispersion tube 50 is connected to the first port of the connection seat 60 .

[0052] It should be understood that the above-mentioned dispersion tube 50 can be a stress dispersion tube 50, wherein the material of the stress dispersion tube 50 can be silicone rubber to eliminate the stress caused by the catheter during use.

[0053] In an optional embodiment, the connecting base 60 may also be made of polycarbonate.

[0054] In the embodiment of the present application, the connecting seat 60 is used to connect the catheter to an external device to facilitate the expansion operation of the balloon 31.

[0055] The connecting seat 60 has two ports: the upper one is a filling cavity, through which the syringe injects liquid into the balloon 31, and the liquid flows to the balloon 31 through the cavity between the outer tube 40 and the inner tube 10, causing the balloon 31 to expand, thereby completing the operation; the lower one is a guidewire cavity, which can be pushed to the lesion site along the guidewire through the guidewire port.

[0056] Optionally, the connecting seat 60 further includes a guidewire port 61 , which is arranged opposite to the first port and is used for inserting a guidewire.

[0057] It should be understood that a guide wire is a commonly used device for interventional therapy. In the embodiment of the present application, the guide wire can be used in conjunction with a balloon dilatation catheter.

[0058] In specific implementation, the guide wire can be pushed to the lesion site along the guide wire through the guide wire port 61.

[0059] Optionally, the connecting seat 60 further includes a filling port 62 , which is at a first preset angle with the guide wire port 61 , and is used for inputting liquid, and the first preset angle is greater than 0 degrees and less than 90 degrees.

[0060] It should be understood that the filling cavity is above the connecting seat 60. The syringe injects liquid into the balloon 31 through the filling port 62. The liquid flows to the balloon 31 through the cavity between the outer tube 40 and the inner tube 10, causing the balloon 31 to expand, thereby completing the operation.

[0061] Optionally, the tube body 32 is made of polytetrafluoroethylene material.

[0062] Optionally, the developing area is a developing ring forged on the inner tube 10 .

[0063] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A balloon dilatation catheter, characterized in that: include: The inner tube and the head end of the inner tube, the balloon structure and the outer tube are sequentially sleeved on the inner tube along the axial direction of the inner tube; The head end is connected to the inner tube; The balloon structure includes a balloon and multiple tubes arranged around the surface of the balloon, one end of the balloon is connected to the head end, and the other end of the balloon is connected to the outer tube, and the extension direction of the tube is parallel to the axial direction of the inner tube.

2. The balloon dilatation catheter according to claim 1, characterized in that The balloon comprises a cylindrical balloon body and conical balloon bodies arranged at two ends of the cylindrical balloon body; The plurality of tubes are evenly spaced and arranged on the cylindrical capsule, and the lengths of the plurality of tubes match the length of the cylindrical capsule.

3. The balloon dilatation catheter according to claim 2, characterized in that: The cross-sectional diameter of the tube body is smaller than the cross-sectional diameter of the cylindrical capsule.

4. The balloon dilatation catheter according to claim 2, characterized in that: Two developing areas are arranged on the inner tube at intervals, and the distance between the two developing areas is equal to the length of the cylindrical capsule.

5. The balloon dilatation catheter according to claim 4, characterized in that: The inner tube comprises an inner layer tube, a middle layer tube and an outer layer tube which are stacked and sheathed in sequence.

6. The balloon dilatation catheter according to claim 1, characterized in that The balloon dilatation catheter further comprises a dispersing tube and a connecting seat connected thereto, wherein the connecting seat comprises a first port; The dispersion tube is sleeved on the inner tube, and the first end of the dispersion tube is connected to the outer tube, and the second end of the dispersion tube is connected to the first port of the connecting seat.

7. The balloon dilatation catheter according to claim 6, characterized in that: The connecting seat also includes a guide wire port, which is arranged opposite to the first port and is used for inserting a guide wire.

8. The balloon dilatation catheter according to claim 7, characterized in that: The connecting seat also includes a filling port, which is at a first preset angle with the guide wire port. The filling port is used to input liquid, and the first preset angle is greater than 0 degrees and less than 90 degrees.

9. The balloon dilatation catheter according to claim 1, characterized in that: The tube body is made of polytetrafluoroethylene material.

10. The balloon dilatation catheter according to claim 4, characterized in that: The developing area is a developing ring forged on the inner tube.

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