Urethra balloon dilatation catheter

Abstract

The utility model relates to a urethra balloon dilatation catheter. The urethra balloon dilatation catheter comprises a catheter main body, a catheter body and a balloon, the balloon is mounted on the catheter main body and can be controllably expanded in the radial direction of the catheter main body; and the protection piece wraps the balloon, and when the balloon is expanded, the protection piece can be expanded along with the balloon. According to the urethra balloon dilatation catheter, the balloon is wrapped by the protection part, when the balloon is not expanded, the protection part can enter the urethra along with the balloon and the catheter body, when the balloon is expanded, the protection part can be expanded along with the balloon, and therefore a protection layer is formed on the surface of the balloon through the protection part; and when the balloon bears internal high pressure, the protection layer formed by the protection piece can protect the balloon, so that the risk of balloon explosion is reduced.

Description

Technical Field

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

[0002] Urethral stricture is the narrowing of the urethra, which can lead to painful urination, bladder stone formation, urethral infection, and may cause kidney damage. Urethral stricture may be postoperative, instrument-related, or caused by injury, trauma, infection, radiation, and in many cases, the cause cannot be determined. Urethral stricture ranges from a short and soft urethral narrowing with mild symptoms to a rigid urethral stricture beside the urethra that requires invasive reconstructive surgery or urinary diversion. Urethral stricture occurs at different positions along the urethral lumen, mainly depending on the cause of the stricture.

[0003] Currently, rehabilitation treatment is achieved by inserting a balloon dilator catheter into the urethra. However, the balloon dilator catheter is provided with a balloon, which will expand outward after inflation. Although it can dilate the tight stricture site and achieve the treatment purpose, there is a risk of bursting after the balloon is inflated. Once the balloon bursts, it is easy to cause harm to the patient. Summary of the Invention

[0004] Based on this, it is necessary to provide a urethral balloon dilatation catheter aiming at the problem that there is a risk of bursting after the balloon is inflated.

[0005] A urethral balloon dilatation catheter includes:

[0006] A catheter body;

[0007] A balloon, installed on the catheter body and controllably expandable in the radial direction of the catheter body;

[0008] A protective member, wrapping the balloon, and when the balloon expands, the protective member can expand together with the balloon.

[0009] In one embodiment, the protective member is a mesh structure.

[0010] In one embodiment, the protective member is woven into a mesh by multiple braided wires, and the material of the braided wires is polyethylene.

[0011] In one embodiment, the protective member is adhered to the balloon.

[0012] In one embodiment, in the longitudinal direction of the catheter body, at least one end of the balloon is conical or spherical.

[0013] In one embodiment, in its own longitudinal direction, the end of the catheter body close to the balloon is provided with a hydrophilic coating.

[0014] In one embodiment, the urethral balloon dilation catheter further includes a connection block and an inflation catheter. The connection block is mounted on the catheter body, and the inflation catheter is mounted on the connection block and communicates with the balloon.

[0015] In one embodiment, the urethral balloon dilation catheter further includes a straight-through valve and a pressure pump. The straight-through valve communicates with the dilation catheter and the pressure pump respectively, and the straight-through valve can control the connection and disconnection between the pressure pump and the dilation catheter.

[0016] In one embodiment, a Luer connector is provided at one end of the inflation catheter away from the balloon;

[0017] and / or, a Luer connector is provided at one end of the catheter body away from the balloon.

[0018] In one embodiment, a radiopaque ring is provided inside the catheter body, and the radiopaque ring is located in a section of the catheter body where the balloon is provided.

[0019] For the above urethral balloon dilation catheter, the balloon is wrapped by a protective member. When the balloon is not inflated, the protective member can enter the urethra together with the balloon and the catheter body. When the balloon is inflated, the protective member can expand together with the balloon, so as to form a protective layer on the surface of the balloon through the protective member. When the balloon bears the high pressure inside, the protective layer formed by the protective member can protect the balloon, thereby reducing the risk of balloon rupture.

[0020] In order to prevent the protective member from detaching from the balloon, after a mesh structure is woven on the balloon by a braided wire, it is then fixed on the balloon by UV glue, so that the protective member is adhered to the balloon, preventing the protective member from detaching from the balloon during the process of the urethral balloon dilation catheter entering the urethra.

[0021] A radiopaque ring is provided inside the catheter body. The radiopaque ring is located in a section of the catheter body where the balloon is provided, that is, the position of the radiopaque ring is close to the position of the balloon. The radiopaque ring is made of stainless steel and has good radiopaque characteristics. Doctors can track the position of the balloon through the radiopaque ring to facilitate the operation of the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a urethral balloon dilation catheter according to some embodiments of the present application.

[0023] Figure 2 is Figure 1 A schematic structural diagram of the urethral balloon dilation catheter in the embodiment after removing the straight-through valve and the pressure pump.

[0024] Figure 3 is Figure 1Schematic structural diagram of the balloon of the urethral balloon dilatation catheter in the embodiment.

[0025] Figure 4 Schematic structural diagram of the balloon of the urethral balloon dilatation catheter in some other embodiments.

[0026] Explanation of the reference numerals:

[0027] Catheter body 10; balloon 11; protective member 12; braided wire 13; hydrophilic coating 14; connection block 15; inflation catheter 16; straight-through valve 17; pressure pump 18; Luer connector 19; radiopaque ring 20; inflation device 21; connecting tube 22; pressure gauge 23. Detailed implementation manners

[0028] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0030] In addition, if such terms as "first" and "second" appear, these terms are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or just means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or just means that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0034] Refer to Figure 1 and Figure 2 As shown in, a urethral balloon dilation catheter provided by an embodiment of the present application includes a catheter body 10, a balloon 11 and a protective member 12. A urine drainage channel is formed inside the catheter body 10. After the catheter body 10 is inserted into the urethra, the urine in the bladder can be discharged through the urine drainage channel inside the catheter body 10. At the same time, the urine drainage channel can be used to input normal saline or medicine solution into the bladder for treatment.

[0035] The balloon 11 is installed on the catheter body 10. Both the balloon 11 and the catheter body 10 are made of polyamide PA12. The balloon 11 can be controllably expanded in the radial direction of the catheter body 10. The balloon 11 can be expanded by introducing high-pressure gas or physiological saline into the balloon 11. After the catheter body 10 and the balloon 11 are inserted into the urethra together, the balloon 11 can be controlled to expand. On the one hand, it can prevent the catheter body 10 from being accidentally pulled out. On the other hand, it can block the bladder urethral orifice and prevent the liquid during urethral irrigation from flowing back into the bladder, resulting in upper urinary tract infection.

[0036] Among them, the protective member 12 wraps the balloon 11. When the balloon 11 is not expanded, the protective member 12 can enter the urethra together with the balloon 11 and the catheter body 10. When the balloon 11 expands, the protective member 12 can expand together with the balloon 11, so as to form a protective layer on the surface of the balloon 11 through the protective member 12. When the balloon 11 bears the internal high pressure, the protective layer formed by the protective member 12 can protect the balloon 11, thereby reducing the risk of balloon 11 bursting.

[0037] It should be noted that during the process of the protective member 12 expanding together with the balloon 11, the protective member 12 can produce elastic deformation due to the expansion of the balloon 11, or can produce flexible deformation due to the expansion of the balloon 11. If the protective member 12 produces elastic deformation, the protective member 12 can be made of elastic materials such as rubber. The protective member 12 expands or collapses together with the balloon 11. If the protective member 12 produces flexible deformation, the protective member 12 can be made of flexible materials such as metal parts. The protective member 12 only expands together with the balloon 11 and cannot collapse together with the balloon 11.

[0038] Among them, the protective member 12 is a mesh structure, can also be a sheet structure, or can be a tubular structure, as long as it can wrap some embodiments of the present application. In some embodiments, the protective member 12 is a mesh structure, and the protective member 12 is woven into a mesh by multiple braided wires. In actual use, the protective member 12 can be formed by directly braiding braided wires on the balloon 11. The material of the braided wires can be high molecular weight polyethylene.

[0039] In some embodiments of the present application, in order to prevent the protective member 12 from falling off the balloon 11, after the braided wires 13 are woven into a mesh structure on the balloon 11, it is fixed on the balloon 11 by UV glue, so that the protective member 12 is adhered to the balloon 11, and to prevent the protective member 12 from falling off the balloon 11 during the process of the urethral balloon dilation catheter entering the urethra.

[0040] In some embodiments of the present application, such as Figure 3As shown, in the longitudinal direction of the catheter body 10, both ends of the balloon 11 are tapered so that the balloon 11 can be inserted into the patient's urethra more smoothly. In some other embodiments, for example Figure 4 As shown, both ends of the balloon 11 can also be spherical. In still other embodiments, one end of the balloon 11 can be spherical and the other end can be tapered, which is not limited herein.

[0041] In some embodiments of the present application, in its own longitudinal direction, a hydrophilic coating 14 is provided at one end of the catheter body 10 close to the balloon 11. After being infiltrated by urine, the hydrophilic coating 14 greatly reduces the friction force and plays a lubricating role, so that the catheter body 10 can be inserted into the patient's urethra more smoothly.

[0042] In some embodiments of the present application, in order to input gas or liquid into the balloon 11 to make the balloon 11 expand, the urethral balloon dilatation catheter further includes a connection block 15 and an inflation catheter 16. The connection block 15 is installed on the catheter body 10, and the inflation catheter 16 is installed on the connection block 15 and is connected to the balloon 11. In this way, external gas or liquid can be input into the balloon 11 through the inflation catheter 16, so that the balloon 11 expands, and the gas or liquid in the balloon 11 can also be discharged from the balloon 11 through the inflation catheter 16. The connection block 15 is made of polycarbonate PC, which can play a role in fixing the inflation catheter 16 and prevent the inflation catheter 16 and the catheter body 10 from being entangled with each other.

[0043] In some embodiments, the urethral balloon dilatation catheter further includes a straight-through valve 17 and a pressure pump 18. The straight-through valve 17 is respectively connected to the dilatation catheter and the pressure pump 18. The straight-through valve 17 can control the connection and disconnection between the pressure pump 18 and the dilatation catheter. The pressure pump 18 is made of acrylonitrile-butadiene-styrene copolymer ABS and is composed of an inflation device 21, a pressure gauge 23, a connecting pipe 22 and a connector. The inflation device 21 is connected to the straight-through valve 17 through the connecting pipe 22, and the pressure gauge 23 is arranged on the inflation device 21 to detect the air pressure output by the inflation device 21. When the straight-through valve 17 is opened, the gas output by the inflation device 21 is input into the balloon 11 through the straight-through valve 17, so that the balloon 11 expands. After the balloon 11 expands in place, the straight-through valve 17 is controlled to close, and the gas is stored in the balloon 11 to maintain the expanded state of the balloon 11.

[0044] In some embodiments, a Luer connector 19 is provided at one end of the inflation catheter 16 away from the balloon 11. The Luer connector is made of acrylonitrile-butadiene-styrene copolymer (ABS). The Luer connector 19 facilitates the installation and disassembly of the inflation catheter 16 and the straight-through valve 17. Also, a Luer connector 19 is provided at one end of the catheter body 10 away from the balloon 11 to connect the catheter body 10 to other devices. For example, it is connected to a pipeline for injecting drugs through the Luer connector 19, so that the drug is injected into the bladder through the pipeline body for treatment.

[0045] In some embodiments of the present application, a radiopaque ring 20 is provided inside the catheter body 10. The radiopaque ring 20 is located within a section of the catheter body 10 where the balloon 11 is provided, that is, the position of the radiopaque ring 20 is close to the position of the balloon 11. The radiopaque ring 20 is made of stainless steel and has good radiopaque properties. Doctors can track the position of the balloon 11 through the radiopaque ring 20 to facilitate the operation of the surgery.

[0046] The above urethral balloon dilation catheter has at least the following advantages:

[0047] By wrapping the balloon 11 with the protective member 12, when the balloon 11 is not inflated, the protective member 12 can enter the urethra together with the balloon 11 and the catheter body 10. When the balloon 11 is inflated, the protective member 12 can expand together with the balloon 11, thereby forming a protective layer on the surface of the balloon 11 through the protective member 12. When the balloon 11 bears the internal high pressure, the protective layer formed by the protective member 12 can protect the balloon 11, thus reducing the risk of balloon 11 bursting.

[0048] To prevent the protective member 12 from detaching from the balloon 11, after weaving a mesh structure on the balloon 11 with the braided wire 13, it is fixed on the balloon 11 with UV glue, so that the protective member 12 is adhered to the balloon 11, preventing the protective member 12 from detaching from the balloon 11 during the process of the urethral balloon dilation catheter entering the urethra.

[0049] A radiopaque ring 20 is provided inside the catheter body 10. The radiopaque ring 20 is located within a section of the catheter body 10 where the balloon 11 is provided, that is, the position of the radiopaque ring 20 is close to the position of the balloon 11. The radiopaque ring 20 is made of stainless steel and has good radiopaque properties. Doctors can track the position of the balloon 11 through the radiopaque ring 20 to facilitate the operation of the surgery.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0051] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A urethral balloon dilation catheter, characterized in that, The urethral balloon dilatation catheter comprises: a catheter body (10); a balloon (11), mounted on the catheter body (10) and controllably expandable in the radial direction of the catheter body (10); a protective member (12), wrapping the balloon (11), and capable of expanding together with the balloon (11) when the balloon (11) expands.

2. The urethral balloon dilation catheter according to claim 1, wherein The protective member (12) is of a mesh structure.

3. The urethral balloon dilatation catheter according to claim 2, wherein, The protective member (12) is woven into a mesh by a plurality of braided wires (13), and the material of the braided wires (13) is polyethylene.

4. The urethral balloon dilation catheter according to claim 1, wherein, The protective member (12) is adhered to the balloon (11).

5. The urethral balloon dilatation catheter according to claim 1, wherein In the longitudinal direction of the catheter body (10), at least one end of the balloon (11) is conical or spherical.

6. The urethral balloon dilation catheter according to claim 1, wherein In its own longitudinal direction, one end of the catheter body (10) close to the balloon (11) is provided with a hydrophilic coating (14).

7. The urethral balloon dilation catheter according to claim 1, wherein The urethral balloon dilatation catheter further comprises a connection block (15) and an inflation catheter (16), the connection block (15) is mounted on the catheter body (10), the inflation catheter (16) is mounted on the connection block (15) and is in communication with the balloon (11).

8. The urethral balloon dilation catheter according to claim 7, characterized in that, The urethral balloon dilatation catheter further comprises a straight-through valve (17) and a pressure pump (18), the straight-through valve (17) is respectively in communication with the dilatation catheter and the pressure pump (18), and the straight-through valve (17) can control the communication and disconnection between the pressure pump (18) and the dilatation catheter.

9. The urethral balloon dilation catheter according to claim 7, wherein, One end of the inflation catheter (16) away from the balloon (11) is provided with a Luer connector (19); and / or, one end of the catheter body (10) away from the balloon (11) is provided with a Luer connector (19).

10. The urethral balloon dilatation catheter according to claim 1, characterized in that, A radiopaque ring (20) is arranged in the catheter body (10), and the radiopaque ring (20) is located in a section of the catheter body (10) where the balloon (11) is arranged.

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