Balloon catheter dilator with textures on outer surface

Abstract

The balloon catheter dilator with the textures on the outer surface comprises a catheter, a reinforcing tube and a tube seat, the reinforcing tube is sleeved at one end of the catheter, the reinforcing tube and one end of the catheter are inserted into the tube seat, a balloon is arranged at the other end of the catheter, the textures are arranged on the outer surface of the balloon, and the outer surface of the balloon is provided with the textures. And a hydrophilic coating is arranged on the outer surface of the balloon. According to the balloon catheter dilator with the textures on the outer surface, the texture design of the surface of the balloon body is increased, namely, the roughness of the outer surface of the balloon is increased, the attachment of a hydrophilic coating is facilitated, when the hydrophilic coating is coated, the hydrophilic coating is better attached, the effect of the hydrophilic coating is better, and the problem that the hydrophilic coating falls off is solved; the roughness of the outer surface of the balloon is increased, so that the positioning effect of the balloon can be improved, namely the friction force between the outer surface of the balloon and the tube wall is increased, and the balloon is prevented from moving in the blood vessel after being inflated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a balloon catheter dilator with a textured outer surface. Background Art

[0002] Human body cavities (such as esophagus, biliary tract, intestine, etc.) will cause stenosis and obstruction due to various diseases, and balloon dilation treatment is required. The balloon dilator in the treatment of cardiovascular diseases is mainly used in coronary artery revascularization technology, especially for the dilation of stenotic coronary arteries. At present, the balloon of the balloon dilator adopted in the existing technology is smooth. On the one hand, after the smooth balloon is dilated, the balloon cannot be stable at the diseased part. On the other hand, the hydrophilic coating is poorly combined with the balloon body. After the balloon is dilated, the coating is easy to fall off and cause blood vessel embolism along with blood circulation. Content of the Utility Model

[0003] Therefore, an object of the present utility model is to provide a balloon catheter dilator with a textured outer surface to solve the problems mentioned in the background art and overcome the deficiencies existing in the prior art.

[0004] In order to achieve the above object, the present utility model adopts the following technical solutions:

[0005] A balloon catheter dilator with a textured outer surface includes a catheter, a reinforcing tube and a tube seat. The reinforcing tube is sleeved at one end of the catheter. One end of the reinforcing tube and the catheter is inserted into the interior of the tube seat. The other end of the catheter is provided with a balloon. The outer surface of the balloon is provided with texture, and the outer surface of the balloon is provided with a hydrophilic coating.

[0006] Further, the balloon includes a front section, a middle section and a rear section, and the texture is provided on the middle section of the balloon.

[0007] Further, the catheter is hollow inside, and through holes are provided on the outer wall at the other end of the catheter, and the balloon covers the through holes.

[0008] Further, the texture is specifically a number of protrusions, and grooves are formed between adjacent two protrusions, and the heights of the number of protrusions are different.

[0009] Further, the tube seat is provided with a first cavity and a second cavity. One end of the first cavity is connected to one end of the second cavity, and a step is provided between the first cavity and the second cavity.

[0010] Further, the end of the tube seat away from the catheter is provided with an external thread.

[0011] Furthermore, the reinforcing tube and the catheter are fixedly connected by bonding or welding, and the reinforcing tube and the socket are fixedly connected by bonding or welding.

[0012] Furthermore, the socket and the reinforcing tube are made of polymer materials.

[0013] Therefore, the present utility model has the following beneficial effects:

[0014] The balloon catheter dilator with a textured outer surface of the present utility model increases the texture design on the surface of the balloon body, that is, increases the roughness of the outer surface of the balloon, which is beneficial to the attachment of the hydrophilic coating. When the hydrophilic coating is applied, the hydrophilic coating adheres better, and the effect of the hydrophilic coating is better, avoiding the problem of the hydrophilic coating peeling off. In addition, increasing the roughness of the outer surface of the balloon can increase the positioning effect of the balloon, that is, increase the friction between the outer surface of the balloon and the tube wall, and avoid the movement of the balloon in the blood vessel after inflation.

[0015] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0017] Figure 1 is an axonometric view of the dilator of the present utility model;

[0018] Figure 2 is a front view of the dilator of the present utility model;

[0019] Figure 3 is Figure 2 the A-A cross-sectional view shown;

[0020] Figure 4 is a schematic diagram of the texture of the balloon body in the embodiment of the present utility model;

[0021] Figure 5 is a schematic diagram of the cross-sectional texture of the balloon body in the embodiment of the present utility model;

[0022] Figure 6 is a schematic diagram of the catheter and the balloon in the embodiment of the present utility model.

[0023] In the figure: 1, catheter; 2, reinforcing tube; 3, socket; 4, balloon; 5, first cavity; 6, second cavity; 7, through hole; 8, protrusion; 9, groove; 10, step; 11, external thread; 12, front section; 13, middle section; 14, rear section. Detailed Embodiments

[0024] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0025] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. 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 elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] As Figures 1-6 shown, a balloon catheter dilator with a textured outer surface includes a catheter 1, a reinforcing tube 2, and a hub 3. The reinforcing tube 2 is sleeved on one end of the catheter 1, and one ends of the reinforcing tube 2 and the catheter 1 are inserted into the interior of the hub 3. The other end of the catheter 1 is provided with a balloon 4. The outer surface of the balloon 4 is provided with texture, and the outer surface of the balloon 4 is provided with a hydrophilic coating.

[0027] For the balloon catheter dilator with a textured outer surface of the present utility model, the texture design on the surface of the balloon 4 is increased, that is, the roughness of the outer surface of the balloon 4 is increased, which is beneficial to the attachment of the hydrophilic coating. When the hydrophilic coating is applied, the hydrophilic coating can better adhere, avoiding the problem of the hydrophilic coating falling off. In addition, the texture on the outer surface of the balloon 4 increases the roughness of the outer surface of the balloon 4, which can increase the positioning effect of the balloon 4, that is, increase the friction between the outer surface of the balloon 4 and the tube wall, and avoid the movement of the balloon 4 in the blood vessel after inflation.

[0028] Specifically, the texture on the outer surface of the balloon 4 is used to increase the roughness of the outer surface of the balloon 4, so that the balloon 4 forms a surface profile with a certain roughness.

[0029] When the balloon 4 is in a contracted state, the balloon 4 is closely attached to the surface of one end of the catheter 1. The texture on the outer surface of the balloon 4 is larger, more obvious, and rougher. When the balloon 4 is in an inflated state, the surface of the balloon 4 is tightened, so that the texture on the outer surface of the balloon 4 is smaller, that is, the inflated balloon is tightened to have a surface roughness significantly smaller than that of the balloon in the contracted state.

[0030] As Figure 4 shown, it is the state when the balloon 4 is inflated. As Figure 6As shown, the balloon 4 includes a front section 12, a middle section 13, and a rear section 14, and the texture is provided on the middle section 13 of the balloon 4. As Figure 5 shown, further, the texture is specifically a number of protrusions 8 or convex teeth, and a groove 9 is formed between two adjacent protrusions 8. The heights of the number of protrusions 8 are different. The shape of the protrusions 8 is irregular, some protrusions 8 are larger, some protrusions 8 are smaller, some protrusions 8 have a sharp tip, and some protrusions 8 have a blunt tip. The grooves 9 or tooth grooves between two adjacent protrusions 8 or convex teeth are also different in size and depth.

[0031] Further, the inside of the catheter 1 is hollow, and a through hole 7 is provided on the outer wall at the other end of the catheter 1, and the balloon 4 covers the through hole 7 inside.

[0032] The through hole 7 serves as a channel for inflating or injecting liquid into the inside of the balloon 4, so that the contracted balloon 4 expands, thereby expanding the narrow channel or blood vessel.

[0033] Further, as Figure 3 shown, a first cavity 5 and a second cavity 6 are provided in the tube seat 3. One end of the first cavity 5 is connected to one end of the second cavity 6, and a step 10 is provided between the first cavity 5 and the second cavity 6.

[0034] As an implementation manner, the catheter 1 and the reinforcing tube 2 are inserted into the inside of the tube seat 3. The reinforcing tube 2 extends into the first cavity 5 of the tube seat 3 until the junction of the first cavity 5 and the second cavity 6. The step 10 is used for limiting the reinforcing tube 2, and the catheter 1 extends into the second cavity 6 of the tube seat 3.

[0035] Further, an external thread 11 is provided at one end of the tube seat 3 away from the catheter 1.

[0036] The external thread 11 is used to connect a syringe or cooperate with a Luer connector to connect other devices or instruments.

[0037] Further, the reinforcing tube 2 and the catheter 1 are fixedly connected by bonding or welding, and the reinforcing tube 2 and the tube seat 3 are fixedly connected by bonding or welding.

[0038] As an implementation manner, the outer wall of the reinforcing tube 2 and the inner wall of the first cavity 5 of the tube seat 3 are fixedly connected by bonding.

[0039] As an implementation manner, the outer wall of the reinforcing tube 2 and the inner wall of the first cavity 5 of the tube seat 3 are fixedly connected by welding.

[0040] As an implementation manner, the outer wall of the catheter 1 and the inner wall of the second cavity 6 of the tube seat 3 are fixedly connected by bonding.

[0041] As an implementation manner, the outer wall of the catheter 1 and the inner wall of the second cavity 6 of the socket 3 are fixedly connected by welding.

[0042] As an implementation manner, the inner wall of the reinforcing tube 2 and the outer wall of the catheter 1 are fixedly connected by bonding.

[0043] As an implementation manner, the inner wall of the reinforcing tube 2 and the outer wall of the catheter 1 are fixedly connected by welding.

[0044] Furthermore, the materials of the socket 3 and the reinforcing tube 2 are polymer materials.

[0045] As an implementation manner, the balloon 4 is made of a polymer material.

[0046] As an implementation manner, the balloon 4 is connected to the catheter 1 by means of adhesive bonding.

[0047] As an implementation manner, the balloon 4 is connected to the catheter 1 by means of ultrasonic welding.

[0048] As an implementation manner, the balloon 4 is connected to the catheter 1 by means of heat fusion bonding.

[0049] The texture or rough contour on the outer surface of the balloon 4 of the present utility model can also be used to transfer drugs to the treatment site in the body's blood vessels. Specifically, when the balloon 4 is in a contracted state, the drug can be coated into the grooves 9 between the protrusions 8 on the surface of the balloon 4. When the balloon 4 expands in the body's blood vessels, the outer surface of the balloon 4 becomes smooth due to the tension of the balloon 4 wall, making the grooves 9 between the protrusions 8 on the surface of the balloon 4 smaller, thereby implanting the drug into the treatment area of the body's blood vessels.

[0050] When using the balloon catheter dilator of the present utility model, since the wall thickness of the balloon 4 is extremely thin and it is closely attached to the surface of one end of the head of the catheter 1, the balloon 4 can maintain a very small diameter before expansion. During operation, the doctor first inserts the endoscope, then inserts the guide wire through the forceps channel hole, and then inserts the balloon 4 dilator of the present utility model under the guidance of the guide wire. The syringe is used to inflate or inject liquid into the socket 3, and the gas or liquid enters the balloon 4 through the through hole 7 on the catheter 1, thereby causing the balloon 4 to expand.

[0051] For the balloon catheter dilator with a textured outer surface of the present utility model, adding a texture design to the surface of the balloon 4 body, that is, increasing the roughness of the outer surface of the balloon 4, is beneficial to the attachment of the hydrophilic coating. When applying the hydrophilic coating, the hydrophilic coating can better adhere, avoiding the problem of the hydrophilic coating peeling off. In addition, the texture on the outer surface of the balloon 4 increases the roughness of the outer surface of the balloon 4, which can increase the positioning effect of the balloon 4, that is, increase the friction between the outer surface of the balloon 4 and the blood vessel wall, and avoid the movement of the balloon 4 in the blood vessel after inflation.

[0052] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] It is not difficult for those skilled in the art to understand that the present utility model includes any combination of the utility model content and the specific implementation part of the above specification and each part shown in the drawings. Due to space limitations and to make the specification concise, the various solutions formed by these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0054] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present utility model without departing from the principle and purpose of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A balloon catheter dilator with a textured outer surface, characterized in that, It includes a catheter, a reinforcing tube and a socket. The reinforcing tube is sleeved on one end of the catheter. One end of the reinforcing tube and the catheter is inserted into the interior of the socket. The other end of the catheter is provided with a balloon. The outer surface of the balloon is provided with textures and a hydrophilic coating.

2. The balloon catheter dilator with a textured outer surface according to claim 1, wherein The balloon includes a front section, a middle section and a rear section. The textures are provided on the middle section of the balloon.

3. The balloon catheter dilator with a textured outer surface according to claim 2, wherein, The interior of the catheter is hollow. A through hole is provided on the outer wall of the other end of the catheter. The balloon covers the through hole.

4. The balloon catheter dilator with a textured outer surface according to claim 1, wherein, The textures are specifically a number of protrusions. Grooves are formed between adjacent two protrusions. The heights of the number of protrusions are different.

5. A balloon catheter dilator having a textured outer surface according to claim 1, wherein, The socket is provided with a first cavity and a second cavity. One end of the first cavity is connected to one end of the second cavity. A step is provided between the first cavity and the second cavity.

6. The balloon catheter dilator with a textured outer surface according to claim 5, wherein The end of the socket away from the catheter is provided with an external thread.

7. The balloon catheter dilator with a textured outer surface according to claim 1, wherein, The reinforcing tube and the catheter are fixedly connected by bonding or welding. The reinforcing tube and the socket are fixedly connected by bonding or welding.

8. A balloon catheter dilator having a textured outer surface according to any one of claims 1-7, characterized in that, The materials of the socket and the reinforcing tube are high molecular materials.

Images