Medical balloon, balloon catheter and manufacturing method of medical balloon

Abstract

The present invention discloses a medical balloon, a balloon catheter and a manufacturing method of the medical balloon, relating to the technical field of medical devices. The medical balloon includes a balloon body and a pressure-resistant layer; the balloon body includes a spherical main section and a first end portion and a second end portion respectively disposed at both ends of the spherical main section, and the first end portion and the second end portion are adapted to be sleeved on the outer periphery of a catheter; the pressure-resistant layer is disposed around the outer periphery of the balloon body, and the first end portion and the second end portion of the balloon body are fixed to the pressure-resistant layer at their corresponding positions, and the spherical main section is not fixed to the pressure-resistant layer at its corresponding position. The present invention improves the structure and manufacturing method of the medical balloon, reduces the usage amount of glue, reduces the thickness of the balloon, improves the passing property of the balloon in a blood vessel at the same time, and reduces the difficulty of the operation; in addition, the balloon of the present invention can be folded into an initial multi-wing state when the pressure is released, reducing the overall outer diameter of the balloon, which is beneficial to the withdrawal of the balloon.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a medical balloon, a balloon catheter and a manufacturing method of a medical balloon. Background Art

[0002] Interventional surgery has the characteristics of less trauma and quick recovery, and thus is widely used. When the lesion is a severe calcified lesion, during the operation, if the operator uses a traditional balloon for dilation, the balloon pressure is not enough to expand the lesion, and the balloon is easily punctured by the calcified lesion, resulting in injury to the vascular intima and failure of the operation.

[0003] In order to improve the pressure resistance performance of the balloon, a common current method is to fix a braided mesh to the balloon by coating glue to form a high-pressure resistant balloon. In order to stably connect the fiber filaments of the braided mesh to the outer surface of the balloon, it is usually necessary to coat a relatively thick glue layer, which makes the balloon harder and occupies a larger volume during the folding and winding process, affecting the passage of the balloon in the blood vessel and increasing the difficulty of the operation process; in addition, due to the fiber layer and the relatively thick glue provided on the surface of the high-pressure resistant balloon, when the high-pressure resistant balloon deflates and contracts, it is difficult to return to the initial folded state, making the volume of the entire pressure-resistant balloon relatively large and not conducive to the retraction of the pressure-resistant balloon. Summary of the Invention

[0004] The main purpose of the present invention is to provide a medical balloon, a balloon catheter and a manufacturing method of a medical balloon, aiming to improve the passage of the balloon in the blood vessel, enhance the convenience of the balloon retraction, and reduce the difficulty of the operation.

[0005] To achieve the above object, the present invention provides a medical balloon, comprising:

[0006] A balloon body, including a spherical main section and a first end portion and a second end portion respectively provided at both ends of the spherical main section, the first end portion and the second end portion being adapted to be sleeved on the outer periphery of a catheter; and

[0007] A pressure-resistant layer, disposed around the outer periphery of the balloon body, and the first end portion and the second end portion of the balloon body are fixed to the corresponding positions of the pressure-resistant layer, and the spherical main section is not fixed to the corresponding position of the pressure-resistant layer.

[0008] Optionally, the pressure-resistant layer is a braided mesh, a cloth or a hollow glue sleeve, the braided mesh is woven by multiple fiber filaments intersecting vertically and horizontally, the diameter of a single fiber filament is 0.010 mm - 0.030 mm, and the tensile breaking strength is 3.0 GPa to 4.0 GPa.

[0009] Optionally, the balloon body includes a plurality of folding wings, and the medical balloon further includes a plurality of elastic fibers. The plurality of elastic fibers are circumferentially spaced and cover the braided net or are integrally braided with the braided net. Each elastic fiber extends along the axial direction of the balloon body and is located on the crease between two adjacent folding wings, so that the balloon body folds back into a multi-wing state when the pressure is released.

[0010] Optionally, an anti-adhesion layer is coated on the surface of the elastic fiber to prevent the elastic fiber from adhering to the filaments of the braided net.

[0011] Optionally, the material of the filaments is a high-strength fiber composed of one or more of poly(p-phenyleneterephthalamide) fiber, aromatic polyamide copolymer fiber, heterocyclic polyamide fiber, carbon fiber, graphite fiber, and silicon carbide fiber; and / or

[0012] The balloon body is made of a polymer material, and the polymer material is one or more of polyvinyl chloride, polyethylene, polyurethane, polyamide, polyether block polyamide, and polyethylene terephthalate.

[0013] To achieve the above object, the present invention provides a balloon catheter, comprising:

[0014] A catheter; and

[0015] The medical balloon as described above, the medical balloon is sleeved on the outer periphery of the distal end of the catheter, and the medical balloon includes:

[0016] A balloon body, including a spherical main section and a first end portion and a second end portion respectively provided at both ends of the spherical main section. The first end portion and the second end portion are adapted to be sleeved on the outer periphery of the catheter; and

[0017] A pressure-resistant layer, disposed around the outer periphery of the balloon body, and the first end portion and the second end portion of the balloon body are fixed to the corresponding positions of the pressure-resistant layer, and the spherical main section is not fixed to the corresponding position of the pressure-resistant layer.

[0018] To achieve the above object, the present invention provides a manufacturing method of a medical balloon, the manufacturing method comprising:

[0019] Arranging a plurality of ordinary fibers and a plurality of elastic fibers on a knitting machine;

[0020] Fixing a knitting mold on the knitting machine, starting the knitting machine, so that the ordinary fibers are knitted to cover the outer periphery of the entire knitting mold to form a braided net; wherein, the ordinary fibers form an acute angle with the axial direction of the knitting mold, and the elastic fibers extend along the longitudinal direction of the knitting mold;

[0021] Spray glue onto the woven net to bond and fix adjacent ordinary fibers;

[0022] Remove the woven net from the weaving mold;

[0023] Place the balloon body in the multi-wing state inside the woven net;

[0024] Inflate the balloon body to make it expand;

[0025] Spray glue onto the woven net at the first end and the second end of the balloon body to fix both ends of the woven net to the first end and the second end of the balloon body, thereby obtaining a medical balloon;

[0026] Fold and wind the medical balloon.

[0027] To achieve the above object, the present invention provides a manufacturing method of a medical balloon, and the manufacturing method includes:

[0028] Arrange multiple ordinary fibers on a knitting machine;

[0029] Fix a weaving mold on the knitting machine, start the knitting machine, and make the ordinary fibers weave and cover the outer periphery of the entire weaving mold;

[0030] Extract the ordinary fibers extending longitudinally and corresponding to the crease of the balloon body, and replace them with elastic fibers to form a woven net;

[0031] Spray glue onto the woven net to bond and fix adjacent ordinary fibers;

[0032] Place the balloon body in the multi-wing state inside the woven net;

[0033] Inflate the balloon body to make it expand;

[0034] Spray glue onto the woven net at the first end and the second end of the balloon body to fix both ends of the woven net to the first end and the second end of the balloon body, thereby obtaining a medical balloon;

[0035] Fold and wind the medical balloon.

[0036] To achieve the above object, the present invention provides a manufacturing method of a medical balloon, and the manufacturing method includes:

[0037] Arrange multiple ordinary fibers on a knitting machine;

[0038] Fix a weaving mold on the knitting machine, start the knitting machine, and make the ordinary fibers weave and cover the outer periphery of the entire weaving mold to form a woven net;

[0039] Spray glue onto the braided net to bond and fix adjacent ordinary fibers;

[0040] Place the balloon body in the multi-wing state inside the braided net;

[0041] Inflate the balloon body to make it expand;

[0042] Spray glue onto the braided net at the first end and the second end of the balloon body to fix both ends of the braided net to the first end and the second end of the balloon body;

[0043] Fold the balloon body into a multi-wing state, and lay elastic fibers at the creases of the balloon body to obtain a medical balloon;

[0044] Fold and wind the medical balloon.

[0045] Optionally, the braiding mold includes a cylindrical shaft and a mold body sleeved on the outer periphery of the middle part of the cylindrical shaft. The mold body is formed by splicing and enclosing a plurality of arc-shaped modules. Each arc-shaped module is convexly provided with a convex block towards the inside in the radial direction. The cylindrical shaft is provided with a groove that fits and matches with the convex block, and the convex block is installed in the groove.

[0046] In the technical solution of the present invention, the medical balloon includes a balloon body and a pressure-resistant layer; the balloon body includes a spherical main section and a first end and a second end respectively arranged at both ends of the spherical main section. The first end and the second end are adapted to be sleeved on the outer periphery of a catheter; the pressure-resistant layer is arranged around the outer periphery of the balloon body, and the first end and the second end of the balloon body are fixed to the pressure-resistant layer at their corresponding positions, and the spherical main section is not fixed to the pressure-resistant layer at its corresponding position. It can be understood that the present invention improves the structure of the medical balloon. By adopting the method of fixing both ends of the pressure-resistant layer to both ends of the balloon body and not fixing the middle part, the amount of glue used is reduced, the thickness of the balloon is reduced, and at the same time, the passing performance of the balloon in the blood vessel is improved, and the difficulty of the operation is reduced; in addition, by arranging elastic fibers on the creases between adjacent folding wings of the medical balloon, the elastic fiber can cover the braided net or be integrally woven with it, so that the medical balloon can be folded into the initial multi-wing state when deflated, reducing the overall outer diameter of the balloon and being beneficial to the withdrawal of the balloon. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0048] Figure 1 Structural schematic diagram of an embodiment of the balloon catheter and the medical balloon of the present invention;

[0049] Figure 2 Structural schematic diagram of the braided mesh in an embodiment of the medical balloon of the present invention;

[0050] Figure 3 Cross-sectional view of the balloon in a multi-wing state in an embodiment of the balloon catheter and the medical balloon of the present invention;

[0051] Figure 4 Structural schematic diagram of the braiding mold used in an embodiment of the manufacturing method of the medical balloon of the present invention;

[0052] Figure 5 Front view of the braiding mold used in an embodiment of the manufacturing method of the medical balloon of the present invention;

[0053] Figure 6 It is Figure 5 Cross-sectional view at A-A in

[0054] Figure 7 It is Figure 5 Cross-sectional view at B-B in

[0055] Figure 8 Process schematic diagram of an embodiment of the manufacturing method of the medical balloon of the present invention;

[0056] Figure 9 Process schematic diagram of another embodiment of the manufacturing method of the medical balloon of the present invention;

[0057] Figure 10 Process schematic diagram of still another embodiment of the manufacturing method of the medical balloon of the present invention.

[0058] Explanation of the reference numerals in the drawings:

[0059] 10. Balloon body; 20. Pressure-resistant layer; 11. Spherical main section; 12. First end; 13. Second end; 111. Folding wing; 21. Braided mesh; 22. Elastic fiber; 30. Catheter; 200. Braiding mold; 201. Cylindrical shaft; 202. Arc module; 2021. Protrusion.

[0060] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0063] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0064] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution that both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0065] The present invention provides a medical balloon, which can be applicable to interventional surgeries such as ablation therapy, and is not limited here.

[0066] Refer to Figures 1 to 3, in an embodiment of the present invention, the medical balloon includes a balloon body 10 and a pressure-resistant layer 20; the balloon body 10 includes a spherical main section 11 and a first end portion 12 and a second end portion 13 respectively provided at both ends of the spherical main section 11, and the first end portion 12 and the second end portion 13 are adapted to be sleeved on the outer periphery of a catheter 30; the pressure-resistant layer 20 is disposed around the outer periphery of the balloon body 10, and the first end portion 12 and the second end portion 13 of the balloon body 10 are fixed to the corresponding positions of the pressure-resistant layer 20 by means of bonding, welding, etc., and the spherical main section 11 is not fixed to the corresponding position of the pressure-resistant layer 20.

[0067] In this embodiment, after inflation, the spherical main section 11 can be in a shape with a cylinder in the middle and frustum-like shapes at both ends, and the first end portion 12 and the second end portion 13 can be circular tubes, etc., which are not limited herein. The balloon body 10 can be made of a polymer material, and the polymer material is one or more of polyvinyl chloride, polyethylene, polyurethane, polyamide, polyether block polyamide, polyethylene terephthalate, etc.

[0068] In this embodiment, the pressure-resistant layer 20 can adopt a structural layer such as a braided mesh 21, a cloth, or a hollow rubber sleeve that can enhance the pressure resistance of the balloon, and preferably the braided mesh 21, which is not limited herein.

[0069] It can be understood that the present invention improves the structure of the medical balloon. By adopting the method of fixing both ends of the pressure-resistant layer 20 to both ends of the balloon body 10 and not fixing the middle part, the usage amount of glue is reduced, the thickness of the balloon is reduced, and at the same time, the passing performance of the balloon in the blood vessel is improved, and the difficulty of the operation is reduced; in addition, when the medical balloon is depressurized, it can be folded into the initial multi-wing state (such as Figure 3 ), the overall outer diameter of the balloon is reduced, which is beneficial to the withdrawal of the balloon.

[0070] Refer to Figures 1 to 3 , in an embodiment, the pressure-resistant layer 20 adopts a braided mesh 21, which can be woven by multiple fiber filaments crisscrossing. The braided mesh 21 at both ends of the balloon body 10 is fixed to the end portions of the balloon body 10, and the braided mesh 21 at other parts of the balloon body 10 is not fixed to the balloon body 10. Specifically, both ends of the braided mesh 21 can be adhesively fixed to the balloon body 10 by glue; among them, the braided mesh 21 is woven by multiple fiber filaments crisscrossing, and the balloon body 10 is constrained by the high strength of the fiber filaments, which can effectively improve the pressure resistance of the balloon, so that the medical balloon can minimize deformation during use to obtain more precise shape control.

[0071] In this embodiment, the material of the fiber filaments is a high-strength fiber composed of one or more of poly-p-phenylene terephthalamide fiber, aromatic polyamide copolymer fiber, heterocyclic polyamide fiber, carbon fiber, graphite fiber, silicon carbide fiber, etc.

[0072] The diameter of a single fiber filament is preferably 0.010 mm - 0.030 mm, and the tensile breaking strength can be 3.0 GPa - 4.0 GPa. Further, the mesh holes of the braided net 21 can be set to 200 μm - 800 μm. With such settings, the medical balloon can have a relatively high pressure resistance, which helps to save fiber filament materials and also enables the medical balloon to be more easily withdrawn after the operation is completed.

[0073] To further enhance the self - recovery ability of the medical balloon, so that when it deflates and contracts, it can quickly and automatically return to the initially folded multi - wing state, reducing the volume of the entire balloon, making the withdrawal of the medical balloon more convenient, and improving the efficiency and safety of the operation. Referring to Figures 1 to 3 In one embodiment, the balloon body 10 may include a plurality of folding wings 111, and the pressure - resistant layer 20 of the medical balloon may further include a number of elastic fibers 22. The number of elastic fibers 22 may be circumferentially spaced and cover the braided net 21 or be integrally woven with it. Each elastic fiber 22 extends along the axial direction of the balloon body 10 and is located on the crease between two adjacent folding wings 111, so that the balloon body 10 can fold back into the multi - wing state when deflating.

[0074] The principle is that when the balloon body 10 expands, the elastic fibers 22 are in a stretched state; when the balloon body 10 deflates and contracts, under the action of the restoring force of the elastic fibers 22, the elastic fibers 22 tend to be in a straight state, and the elastic fibers 22 apply pressure to the balloon body 10, so that the balloon body 10 can be folded into the initial multi - wing state when deflating. In this way, the overall outer diameter of the medical balloon is reduced, which is beneficial to the withdrawal of the medical balloon.

[0075] Among them, the specific number of the elastic fibers 22 can be the same as the number of creases between the folding wings 111. Of course, two or more elastic fibers 22 can also be arranged on one crease, which can be set according to specific circumstances and is not limited here.

[0076] Further, in order not to affect the deformation and recovery of the elastic fibers 22, the elastic fibers 22 should not be bonded to the ordinary fibers of the braided net 21. An anti - bonding layer can be coated on the surface of the elastic fibers 22 to prevent the elastic fibers 22 from bonding to the fiber filaments of the braided net 21. By setting the anti - bonding layer, even if glue is sprayed on the braided net 21, the elastic fibers 22 will not bond to the ordinary fibers of the braided net 21.

[0077] In addition, in some embodiments, a number of electrode pairs can be arranged on the outer periphery of the medical balloon or inside the balloon body 10. The electrode pairs are suitable for being externally connected to the host of the ablation system to achieve pulsed ablation treatment.

[0078] The present invention provides a balloon catheter, combined with Figures 1 to 3, the balloon catheter includes a medical balloon and a catheter 30. The medical balloon is sleeved on the outer periphery of the distal end of the catheter 30. For the specific structure of the medical balloon, refer to the above embodiments. Since the balloon catheter proposed by the present invention includes all the solutions of all the above embodiments of the medical balloon, therefore, it has at least the same technical effects as the above medical balloon, and will not be elaborated one by one here.

[0079] During the operation, the balloon of the balloon catheter is in a contracted state. After the balloon at the distal end of the catheter 30 is delivered to the diseased position of the blood vessel, it is pressurized to expand the balloon. Since the braided mesh 21 restricts the balloon, the pressure resistance performance of the balloon is improved. The high-pressure balloon dilates the blood vessel stenosis lesion. After the treatment at the diseased site is completed, the balloon is depressurized to contract it, and finally the balloon catheter is completely removed from the body.

[0080] It should be noted that although the braided mesh 21 cannot completely contract to a state where it fits the outer wall of the balloon after the balloon is depressurized, since the braided mesh 21 itself is a soft material that is easy to plastically deform, it does not affect the withdrawal of the pressure-resistant balloon.

[0081] The present invention proposes a manufacturing method for a medical balloon. This manufacturing method is used to manufacture one of the above medical balloons. Refer to Figures 1 to 8 , this manufacturing method includes:

[0082] S11. Arrange a plurality of ordinary fibers and several elastic fibers 22 on a knitting machine;

[0083] S12. Fix the knitting mold 200 on the knitting machine, start the knitting machine, and make the ordinary fibers knit and cover the outer periphery of the entire knitting mold 200 to form a braided mesh 21; wherein, the ordinary fibers form an acute angle with the axis of the knitting mold 200, and the elastic fibers 22 extend along the longitudinal direction of the knitting mold 200;

[0084] S13. Spray glue on the braided mesh 21 to bond and fix adjacent ordinary fibers;

[0085] S14. Remove the braided mesh 21 from the knitting mold 200;

[0086] S15. Place the balloon body 10 in a multi-wing state inside the braided mesh 21;

[0087] S16. Inflate the balloon body 10 to make it expand;

[0088] S17. Spray glue on the braided mesh 21 at the first end 12 and the second end 13 of the balloon body 10 to fix both ends of the braided mesh 21 to the first end 12 and the second end 13 of the balloon body 10, so as to obtain a medical balloon;

[0089] S18. Fold and wind the medical balloon.

[0090] Specifically, multiple ordinary fibers and elastic fibers 22 can be first installed on a knitting machine, where the elastic fibers 22 are arranged axially and the ordinary fibers are arranged at an acute angle to the axis; then the knitting mold 200 is fixed on the knitting machine, and the knitting machine knits around the knitting mold 200, so that the ordinary fibers cover the entire knitting mold 200, and the elastic fibers 22 extend longitudinally along the whole of the ordinary fibers to jointly form a knitted mesh 21; then, glue is sprayed on the knitted mesh 21 to fix the multiple ordinary fibers to each other. Since an anti-adhesion layer that does not stick to glue is provided on the surface of the elastic fibers 22, the elastic fibers 22 will not be adhered to the ordinary fibers; in addition, the knitting mold 200 can also be made of a material that does not stick to glue to avoid adhesion on the surfaces of the knitted mesh 21 and the knitting mold 200 during the glue spraying process, so as to facilitate removing the knitted mesh 21 from the knitting mold 200; the knitting mold 200 is composed of several parts spliced together. When the cylindrical shaft 201 of the knitting mold 200 is pulled out, the arc-shaped modules 202 will become loose, and each arc-shaped module 202 is taken out from the knitted mesh 21; then the balloon in a folded and contracted state is placed in the knitted mesh 21; then the balloon is inflated by filling it; glue is sprayed on the knitted mesh 21 at the leg of the balloon tube to fix the two ends of the knitted mesh 21 to the two ends of the balloon, and a high-pressure balloon is obtained; finally, the above high-pressure balloon is folded and wound.

[0091] It is worth mentioning that the knitting mold 200 in this embodiment and the following two manufacturing methods can both adopt a structure similar to the shape of the balloon in the inflated state, that is, a shape with conical ends and a cylindrical middle part, as Figures 4 to 7 shown. The knitting mold 200 includes a cylindrical shaft 201 and a mold body sleeved on the outer periphery of the middle part of the cylindrical shaft 201. The mold body is formed by splicing and enclosing multiple arc-shaped modules 202. The cylindrical shaft 201 is the central axis, and the cylindrical shaft 201 is provided with multiple grooves along the axis. The multiple arc-shaped modules 202 surround the outer peripheral wall of the cylindrical shaft 201 and jointly form the mold body of the knitting mold 200. In this embodiment, preferably, the mold body of a knitting mold 200 can be formed by splicing 6 arc-shaped modules 202, and each arc-shaped module 202 protrudes inward radially with a convex block 2021, and the convex block 2021 is installed in the groove of the cylindrical shaft 201.

[0092] The present invention proposes another manufacturing method for a medical balloon. This manufacturing method is used to manufacture one of the aforementioned medical balloons. Compared with the first manufacturing method above, the solution adopted in this embodiment is to replace some of the ordinary fibers with elastic fibers 22. Referring to Figures 1 to 7 、 Figure 9 , the specific steps are as follows:

[0093] S21. Arrange multiple ordinary fibers on a knitting machine;

[0094] S22. Fix the braiding mold 200 on the braiding machine, start the braiding machine, and make the ordinary fiber braid cover the outer periphery of the entire braiding mold 200;

[0095] S23. Extract the ordinary fibers extending longitudinally and corresponding to the crease of the balloon body 10, and replace them with elastic fibers 22 to form a braided mesh 21;

[0096] S24. Spray glue on the braided mesh 21 to bond and fix adjacent ordinary fibers;

[0097] S25. Place the balloon body 10 in the multi-wing state into the braided mesh 21;

[0098] S26. Inflate the balloon body 10 to make it expand;

[0099] S27. Spray glue on the braided mesh 21 at the first end 12 and the second end 13 of the balloon body 10 to fix the two ends of the braided mesh 21 to the first end 12 and the second end 13 of the balloon body 10, so as to manufacture a medical balloon;

[0100] S28. Fold and wind the medical balloon.

[0101] Specifically, during manufacturing, ordinary fibers can be first braided into a braided mesh 21 on the braiding mold 200, and then some of the ordinary fibers extending longitudinally are extracted, and the elastic fibers 22 are stuffed in, and some of the ordinary fibers are replaced with elastic fibers 22. Since the overall process method of this embodiment is substantially the same as the first manufacturing method, it will not be elaborated here.

[0102] The present invention proposes another manufacturing method for a medical balloon. This manufacturing method is used to manufacture one of the aforementioned medical balloons. Compared with the above two manufacturing methods of braiding the elastic fibers 22 and ordinary fibers together to form the braided mesh 21, the solution adopted in this embodiment is to not braid the elastic fibers 22 and ordinary fibers together, that is, to cover the elastic fibers 22 on the braided mesh 21 formed by ordinary fibers. Refer to Figures 1 to 7 、 Figure 10 , and the specific steps are as follows:

[0103] S31. Arrange multiple ordinary fibers on the braiding machine;

[0104] S32. Fix the braiding mold 200 on the braiding machine, start the braiding machine, and make the ordinary fibers braid and cover the outer periphery of the entire braiding mold 200 to form a braided mesh 21;

[0105] S33. Spray glue on the braided mesh 21 to bond and fix adjacent ordinary fibers;

[0106] S34. Place the balloon body 10 in the multi-wing state into the braided mesh 21;

[0107] S35. Inflate the balloon body 10 to make it expand;

[0108] S36. Spray glue on the braided mesh 21 at the first end 12 and the second end 13 of the balloon body 10 to fix both ends of the braided mesh 21 to the first end 12 and the second end 13 of the balloon body 10;

[0109] S37. Fold the balloon body 10 into a multi-wing state, and lay the elastic fiber 22 at the crease of the balloon body 10 to obtain a medical balloon;

[0110] S38. Fold and wind the medical balloon.

[0111] In this embodiment, a braided mesh 21 can be first woven with ordinary fibers; then the balloon in a folded and contracted state is placed inside the braided mesh 21; then the balloon is inflated to make it expand; spray glue on the braided mesh 21 at the balloon legs to fix both ends of the braided mesh 21 to both ends of the balloon; then fold the balloon to form multiple folding wings 111; arrange the elastic fiber 22 between two adjacent folding wings 111; finally, wind the balloon.

[0112] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A medical balloon, characterized in that: include: The balloon body comprises a spherical main section and a first end and a second end respectively arranged at two ends of the spherical main section, wherein the first end and the second end are suitable for being sleeved on the outer circumference of the catheter; the balloon body has a plurality of folding wings; A pressure-resistant layer is arranged around the outer circumference of the balloon body, and the first end and the second end of the balloon body are fixed to the pressure-resistant layer at the corresponding positions thereof, and the spherical main segment is not fixed to the pressure-resistant layer at the corresponding position thereof; the pressure-resistant layer is a woven mesh, and the woven mesh is woven by a plurality of fiber filaments crisscrossing each other, the diameter of a single fiber filament is 0.010 mm-0.030 mm, and the tensile strength is 3.0 GPa-4.0 GPa; and A plurality of elastic fibers are integrally formed with the woven mesh by extracting and replacing fiber filaments extending longitudinally and corresponding to the folds of the balloon body, the elastic fibers are not bonded to the fiber filaments of the woven mesh, and each of the elastic fibers extends axially along the balloon body and is located on the fold between two adjacent folding wings, so that the balloon body can fold back into a multi-wing state when the pressure is released.

2. The medical balloon according to claim 1, characterized in that: The surface of the elastic fiber is coated with an anti-adhesion layer to prevent the elastic fiber from adhering to the fiber filaments of the woven mesh.

3. The medical balloon according to claim 1, characterized in that: The fiber filaments are made of high-strength fibers composited from one or more of poly(p-phenylene terephthalamide) fibers, aromatic polyamide copolymer fibers, heterocyclic polyamide fibers, carbon fibers, graphite fibers, and silicon carbide fibers; and / or The balloon body is made of polymer material, and the polymer material is one or more materials selected from polyvinyl chloride, polyethylene, polyurethane, polyamide, polyether block polyamide and polyethylene terephthalate.

4. A balloon catheter, characterized in that: include: catheter; as well as The medical balloon according to any one of claims 1 to 3, wherein the medical balloon is sleeved on the outer periphery of the distal end of the catheter.

5. A method for manufacturing the medical balloon according to any one of claims 1 to 3, characterized in that: The manufacturing method comprises: Arranging a plurality of common fibers on a braiding machine; Fixing the braiding mold on the braiding machine, starting the braiding machine, and braiding the common fiber to cover the entire periphery of the braiding mold; Extracting the common fibers extending longitudinally and corresponding to the folds of the balloon body and replacing them with elastic fibers to form a woven mesh; Spraying glue onto the woven mesh to bond and fix the adjacent common fibers; placing the balloon body in a multi-wing state in the woven mesh; Inflating the balloon body to expand it; Spraying glue onto the woven mesh at the first end and the second end of the balloon body to fix the two ends of the woven mesh to the first end and the second end of the balloon body to obtain a medical balloon; The medical balloon is folded and rolled.

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