Anchoring balloon solid catheter

Abstract

The utility model relates to an anchoring balloon solid catheter. The anchoring balloon solid catheter comprises a base, a connecting tube and a balloon, an inner cavity is formed in the base; the connecting pipe comprises an outer pipe layer, a solid rod and a channel, the solid rod is wrapped with the outer pipe layer, one end of the outer pipe layer is connected with the base, the channel is located in the outer pipe layer, one end of the channel is communicated with the inner cavity, the channel extends in the axial direction of the solid rod, and the channel is communicated with the outer pipe layer. The channel is staggered from the central axis of the solid rod; one end of the balloon is connected with the end, away from the base, of the connecting pipe, and the balloon is communicated with the channel. According to the scheme, it can be ensured that the catheter is powerful in pushing and not prone to being bent.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to an anchoring balloon solid catheter. Background Art

[0002] During percutaneous coronary intervention, microcatheters are often used. Microcatheters can support and assist guidewires to reach the proximal end of the lesion, exchange guidewires, and / or open occluded sites. Clinically, microcatheters are often divided into two types: OTW and RX types, and the latter often also includes an OTW lumen, that is, a double-lumen microcatheter. After a doctor or operator achieves the goal using the guidewire in the OTW lumen, it is often necessary to withdraw the catheter while keeping the position of the guidewire unchanged for subsequent balloon follow-up dilation, FFR / IVUS catheter examination and diagnosis, stent implantation, and even rotational ablation operations, etc. There are at least three methods for leaving the guidewire at the target position in the blood vessel, namely the extended guidewire technique, the Nanto method, and the balloon anchoring method.

[0003] The extended guidewire technique is to use an additional 145 cm or other length of extended guidewire to connect to the proximal end of the conventional guidewire to obtain a long guidewire with a total length of more than 300 cm, so as to smoothly withdraw the OTW catheter. During the process, often two people are required to cooperate, and the long guidewire is likely to touch the non-sterile surface around the operating table, so it is often not used. The Nanto method depends more on the experience and skill level of the operator, and the success rate is not high, so it is also much disliked. The balloon anchoring method, that is, the guidewire is fixed in the guiding catheter under inflation by the inserted balloon dilation catheter, is reliable, safe and widely popular.

[0004] However, the balloon anchoring method is also often limited. In the catheterization laboratory, the most commonly used guiding catheter is of 6F specification, accounting for about 95% of the total usage. Compared with a 7F guiding catheter, a 6F guiding catheter has fewer complications and less lumen space. Under the condition that the inner diameter of the guiding catheter is certain, the use of other interventional microcatheters is restricted in terms of outer diameter. For example, when withdrawing catheters with an outer diameter of 2.8F and 2.9F and above after assisting the working guidewire to achieve the goal, the balloon cannot enter the 6F guiding catheter to achieve balloon anchoring and withdrawal, which is not conducive to the smooth progress of the operation.

[0005] Therefore, an anchoring balloon catheter has emerged on the market. The anchoring balloon catheter is a single-lumen structure balloon product without a guidewire rapid exchange lumen. It uses a hollow rod directly connected to the anchoring balloon to achieve balloon dilation; the outer diameter size of the anchoring balloon catheter is compressed below 2.0F. However, due to the thin hollow rod, the hollow rod is easily bent during pushing, resulting in product failure. Utility Model Content

[0006] To solve or partially solve the problems existing in the related art, the present application provides an anchored balloon solid catheter, which can ensure strong catheter pushing force and is not easily bent.

[0007] In a first aspect of the present application, an anchored balloon solid catheter is provided, which includes a base, a connecting tube, and a balloon; an inner cavity is provided in the base; the connecting tube includes an outer tube layer, a solid rod, and a channel. The outer tube layer wraps around the solid rod. One end of the outer tube layer is connected to the base. The channel is inside the outer tube layer. One end of the channel is communicated with the inner cavity. The channel extends along the axial direction of the solid rod, and the channel is offset from the central axis of the solid rod; one end of the balloon is connected to the end of the connecting tube away from the base, and the balloon is communicated with the channel.

[0008] Further, the channel is located in the outer tube layer and outside the solid rod.

[0009] Further, the channel is located in the solid rod.

[0010] Further, a first air groove is provided on the surface of the solid rod, and a second air groove is provided on the inner surface of the outer tube layer. The first air groove and the second air groove enclose to form the channel.

[0011] Further, there are at least two channels, and at least two channels are arranged at intervals in the outer tube layer.

[0012] Further, the base includes a catheter seat and a stress-relieving tube. The inner cavity is located in the catheter seat. One end of the outer tube layer is communicated with the inner cavity. The stress-relieving tube is sleeved outside the outer tube layer.

[0013] Further, one end of the outer tube layer extends into the balloon, the solid rod passes through the balloon, and one end of the solid rod is connected to the balloon.

[0014] Further, the anchored balloon solid catheter further includes a radiopaque ring. The radiopaque ring is sleeved outside the solid rod, the radiopaque ring is located in the outer tube layer, and the radiopaque ring is located in the balloon.

[0015] Further, the outer tube layer is made of nylon or resin material.

[0016] Further, the solid rod is made of metal.

[0017] The technical solution provided by this application may include the following beneficial effects: By wrapping an outer tube layer around a solid rod and providing a channel inside the outer tube layer, the channel can be arranged in the outer tube layer, in the solid rod, or partially in the outer tube layer and partially in the solid rod; the channel is used to supply gas to the balloon. The channel designed in this way will not affect the overall strength of the solid rod and the outer tube layer, and the solid rod can play a supporting role when the connecting tube is pushed, ensuring that the connecting tube is strong and not easily bent during pushing.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0019] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0020] Figure 1 is a schematic structural diagram of an anchoring balloon solid catheter shown in an embodiment of this application;

[0021] Figure 2 is a schematic structural diagram of a base shown in an embodiment of this application;

[0022] Figure 3 is a cross-sectional view of a connecting tube shown in an embodiment of this application;

[0023] Figure 4 is a schematic structural diagram of a base shown in another embodiment of this application;

[0024] Figure 5 is Figure 4 a cross-sectional view of the connecting tube;

[0025] Figure 6 is a schematic structural diagram of a connecting tube with a channel located inside a solid rod shown in an embodiment of this application;

[0026] Figure 7 is Figure 6 a cross-sectional view of the connecting tube.

[0027] Reference Numerals: Base 1; Inner Cavity 11; Catheter Seat 12; Stress Relief Tube 13; Connecting Tube 2; Outer Tube Layer 21; Second Gas Groove 211; Solid Rod 22; First Gas Groove 221; Channel 23; Balloon 3; Marking Ring 4. Detailed Description of the Embodiments

[0028] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0029] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the 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 of the present application.

[0031] Unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] In view of the above problems, an embodiment of the present application provides an anchoring balloon solid catheter, which can ensure strong catheter pushing force and is not easily bent.

[0033] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] Figure 1 is a schematic structural diagram of the anchoring balloon solid catheter shown in the embodiment of the present application; Figure 2 is a schematic structural diagram of the base shown in the embodiment of the present application.

[0035] SeeFigure 1 and Figure 2 , the anchoring balloon solid catheter includes a base 1, a connecting tube 2 and a balloon 3. The base 1 is a tubular structure, and an inner cavity 11 is provided in the base 1, and the inner cavity 11 extends along the axial direction of the base 1. The connecting tube 2 includes an outer tube layer 21, a solid rod 22 and a channel 23. The outer tube layer 21 is made of a polymer, and the outer tube layer 21 wraps around the outer side of the solid rod 22. Specifically, the outer tube layer 21 is made of nylon, Pebax resin or other resin materials. One end of the outer tube layer 21 is connected to the base 1, and the channel 23 is inside the outer tube layer 21. When manufacturing the connecting tube 2, first place the mandrel at the position where the channel 23 needs to be opened on the solid rod 22, then thermally fuse the polymer to the outer surface of the solid rod 22. After the polymer is molded to form the outer tube layer 21, the mandrel is withdrawn to obtain the connecting tube 2. Among them, the diameter of the mandrel is 0.01 - 0.016 inches.

[0036] Figure 3 is a cross-sectional view of the connecting tube shown in the embodiment of the present application.

[0037] See Figures 1 - 3 , the solid rod 22 is made of stainless steel or other metal materials. The diameter of the solid rod 22 is 0.01 - 0.025 inches. The volume of the solid rod 22 is larger than the volume of the outer tube layer 21, and the length of the solid rod 22 is longer than the length of the outer tube layer 21. The solid rod 22 can improve the overall structural strength of the connecting tube 2. The solid core rod is mainly used to provide the rigidity, pushability and anti-bending property required for the body of the connecting tube 2. When extending the balloon 3 to the affected area of the patient's blood vessel, the solid rod 22 plays a supporting role. The channel 23 extends along the axial direction of the solid rod 22, one end of the channel 23 is connected to the inner cavity 11, and the other end of the channel 23 is connected to the balloon 3. The channel 23 can transport gas, and the channel 23 is not in contact with the environment outside the outer tube layer 21, which is convenient for the staff to inflate or evacuate the negative pressure in the base 1, so that the balloon 3 can expand or retract. The staff can inject gas into the inner cavity 11, and the gas is transported to the balloon 3 through the channel 23, so as to expand the balloon 3. The channel 23 is offset from the central axis of the solid rod 22, so as to reduce the influence of the channel 23 on the structural strength of the solid rod 22. One end of the balloon 3 is connected to the end of the connecting tube 2 away from the base 1. The material of the balloon 3 is Pebax resin or nylon, etc., and the size of the balloon 3 is The length is 8 - 15 mm. The outer surface of the distal end of the connecting tube 2 is coated with a hydrophilic coating to facilitate instrument compatibility.

[0038] In this application, a layer of outer tube layer 21 is wrapped around the solid rod 22, and a channel 23 is provided inside the outer tube layer 21. The channel 23 can be provided in the outer tube layer 21, or in the solid rod 22, or partially in the outer tube layer 21 and partially in the solid rod 22. The channel 23 is used to supply gas to the balloon 3. The designed channel 23 will not affect the overall strength of the solid rod 22 and the outer tube layer 21, and the solid rod 22 can play a supporting role when the connecting tube 2 is pushed, ensuring that the connecting tube 2 is strong and not easily bent when pushed. In addition, since the 6F guiding catheter allows the use of other interventional OTW catheters with a maximum of 3.2F, the anchored balloon solid catheter can be used in the 6F guiding catheter.

[0039] See Figure 2 and Figure 3 , in some of these embodiments, the outer tube layer 21 is a discontinuous annular structure, and the channel 23 is located in the outer tube layer 21 and outside the solid rod 22. When making the connecting tube 2, the mandrel can be closely attached to the outer surface of the solid rod 22, and then the polymer is hot-melted and bonded to the outer surface of the solid rod 22. After the mandrel is withdrawn, the channel 23 is formed in the outer tube layer 21 and not on the solid rod 22, and the channel 23 is not exposed on the outer surface of the outer tube layer 21. By opening the channel 23 in the outer tube layer 21, it is convenient to make the channel 23 and it will not affect the structural strength of the solid rod 22.

[0040] Figure 4 is a schematic structural diagram of the base shown in another embodiment of this application; Figure 5 is Figure 4 a cross-sectional view of the connecting tube.

[0041] See Figure 4 and Figure 5, the cross-section of the first air groove 221 is arc-shaped. The radian of the first air groove 221 can be 120°, 180°, or 240°. Preferably, the radian of the first air groove 221 is greater than 180°, which is convenient for embedding the mandrel in the first air groove 221. The inner surface of the outer tube layer 21 is provided with a second air groove 211. The cross-section of the second air groove 211 is semi-circular. The first air groove 221 and the second air groove 211 enclose to form a channel 23. When manufacturing the connecting tube 2, first embed the mandrel into the first air groove 221. A part of the mandrel is exposed on the outer surface of the solid rod 22. Then, heat-melt and bond the polymer on the outer surface of the solid rod 22. After the outer tube layer 21 is formed, the part of the mandrel sinks into the outer tube layer 21. After the mandrel is pulled out, the second air groove 211 formed in the outer tube layer 21 corresponds to the first air groove 221, and the first air groove 221 and the second air groove 211 enclose to form a channel 23. By designing the first air groove 221 on the solid rod 22 and forming the second air groove 211 in the outer tube layer 21, the influence of the channel 23 on the strength of the solid rod 22 can be reduced. The thickness of the outer tube layer 21 only needs to be greater than the radius of the channel 23, and the thickness of the outer tube layer 21 can be designed to be relatively thin.

[0042] Figure 6 is a schematic structural diagram of a connecting tube with a channel located inside a solid rod shown in an embodiment of the present application; Figure 7 is Figure 6 a cross-sectional view of the connecting tube.

[0043] See Figure 6 and Figure 7 , in some of these embodiments, the channel 23 is located in the solid rod 22. The channel 23 can be partially exposed on the outer surface of the solid rod 22 or completely inside the solid rod 22. When the channel 23 is partially exposed on the outer surface of the solid rod 22, when manufacturing the connecting tube 2, it is necessary to first axially insert the mandrel into the solid rod 22, then heat-melt and bond the polymer on the outer surface of the solid rod 22, and then pull out the mandrel from the solid rod 22. Preferably, the aperture of the channel 23 is less than half of the radius of the solid rod 22. When the channel 23 is completely inside the solid rod 22, one end of the channel 23 close to the base 1 is connected to the inner cavity 11 of the Luer connector. The outer tube layer 21 can be designed to be thinner. The thickness of the outer tube layer 21 can be less than the aperture of the channel 23. Such a solid rod design can effectively reduce the cross-sectional area of the connecting tube 2, thereby maximizing the reserved instrument space inside the guiding catheter. To further improve the passability of the catheter, the channels 23 can be evenly distributed around the circumference of the support rod.

[0044] See Figure 7 , there are at least two channels 23. At least two channels 23 are arranged at intervals inside the outer tube layer 21. Preferably, at least two channels 23 are respectively located on opposite sides of the central axis of the solid rod 22. At least two channels 23 can prevent the channels 23 from being bent and blocked when the connecting tube 2 is bent, resulting in resistance to inflation or deflation of the balloon 3.

[0045] See Figure 1 and Figure 2 As shown in FIGS. Figure 1 and Figure 2 , the base 1 includes a catheter seat 12 and a stress-relieving tube 13. The catheter seat 12 is made of a relatively hard resin material such as polycarbonate. The inner cavity 11 is located within the catheter seat 12, and one end of the outer tube layer 21 communicates with the inner cavity 11. The stress-relieving tube 13 is sleeved outside the outer tube layer 21, and one end of the solid rod 22 is within the stress-relieving tube 13. The stress-relieving tube 13 is made of a polyester elastomer material, and the stress-relieving tube 13 can reduce the stress impact on the connecting tube 2 when the connecting tube 2 is pushed in the guiding catheter. One end of the outer tube layer 21 extends into the balloon 3, the solid rod 22 passes through the balloon 3, and one end of the solid rod 22 is connected to the balloon 3. The solid rod 22 can support the balloon 3 to ensure that the balloon 3 can smoothly expand in the blood vessel.

[0046] See Figure 1 and Figure 2 As shown in FIGS. Figure 1 and Figure 2 , the anchored balloon solid catheter further includes a radiopaque ring 4. The radiopaque ring 4 is sleeved outside the solid rod 22, the radiopaque ring 4 is located within the outer tube layer 21, the radiopaque ring 4 is located within the balloon 3, and the radiopaque ring 4 is made of a resin material containing metals, bismuth, barium, etc. that are impervious to radiation or a metal material such as platinum iridium or gold that is impervious to radiation. When the anchored balloon solid catheter extends into the guiding catheter, an X-ray can be taken of the patient to make the radiopaque ring 4 visible, so as to understand the position of the balloon 3 within the patient.

[0047] The solution of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments each have their own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules described in the specification are not necessarily essential to the present application. Additionally, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0048] The various embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. An anchored balloon solid catheter, characterized in that: include: A base, wherein an inner cavity is provided in the base; A connecting tube, the connecting tube comprising an outer tube layer, a solid rod and a channel, the outer tube layer is wrapped outside the solid rod, one end of the outer tube layer is connected to the base, the channel is inside the outer tube layer, one end of the channel is connected to the inner cavity, the channel extends along the axial direction of the solid rod, and the channel is staggered from the central axis of the solid rod; A balloon, one end of which is connected to an end of the connecting tube away from the base, and the balloon is connected to the channel.

2. The anchored balloon solid catheter according to claim 1, characterized in that: The channel is located in the outer tube layer, and the channel is located outside the solid rod.

3. The anchored balloon solid catheter according to claim 1, characterized in that: The channel is located in the solid rod.

4. The anchored balloon solid catheter according to claim 1, characterized in that: A first air groove is formed on the surface of the solid rod, and a second air groove is formed on the inner surface of the outer tube layer. The first air groove and the second air groove together form the channel.

5. The anchored balloon solid catheter according to any one of claims 1, 2, 3 or 4, characterized in that: There are at least two channels, and at least two channels are spaced apart and arranged in the outer tube layer.

6. The anchored balloon solid catheter according to claim 1, characterized in that: The base comprises a catheter seat and a stress relief tube, the inner cavity is located in the catheter seat, one end of the outer tube layer is connected to the inner cavity, and the stress relief tube is sleeved outside the outer tube layer.

7. The anchored balloon solid catheter according to claim 1, characterized in that: One end of the outer tube layer extends into the balloon, the solid rod passes through the balloon, and one end of the solid rod is connected to the balloon.

8. The anchored balloon solid catheter according to claim 1, characterized in that: It also includes a developing ring, which is sleeved outside the solid rod, located inside the outer tube layer, and inside the balloon.

9. The anchored balloon solid catheter according to claim 1, characterized in that: The outer tube layer is made of nylon or resin material.

10. The anchored balloon solid catheter according to claim 1, characterized in that: The solid rod is made of metal.

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