Plugging balloon catheter assembly

Abstract

The utility model discloses a blocking balloon catheter assembly which comprises a guide wire, a catheter and a balloon, and the catheter comprises a catheter body with a far end, a near end and a central cavity. The guide wire penetrates through a central cavity of the catheter body, and the balloon is arranged at the far end of the catheter body in a sleeving mode and communicated with the central cavity of the catheter body. The guide wire is provided with a blocking section located at the far end of the guide wire, and the catheter is provided with a far end blocking part located at the far end of the balloon; and the blocking section of the guide wire is in elastic interference fit with the far-end blocking part of the catheter. The guide wire and the catheter are in elastic interference fit at the plugging position, so that the plugging effect is better, no leakage risk exists, the structure is simple, manufacturing is more convenient, and the manufacturing cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an occluding balloon catheter component. Background Art

[0002] A balloon catheter is a soft catheter with an inflatable balloon, including a guidewire and a catheter, which is used to block blood vessels near the diseased site. When not inflated, the catheter reaches the blood vessels near the diseased site of the human body under the guidance of the guidewire, and then injects liquid into the balloon to inflate the balloon and fit tightly to the inner surface of the blood vessel to achieve the operation.

[0003] The existing method of sealing the central cavity of the occluding balloon catheter adopts a metal wire winding structure at the farthest end, and the occluding guide wire and the occluding catheter are coordinated to complete the occlusion. The wire winding structure has the risk of leakage. Of course, there is also a method of sealing between the guide wire and the catheter by fusion welding, so that the guide wire and the catheter form a whole, and both need to be placed in the diseased area at the same time. Although it simplifies the doctor's placement process, there are certain limitations in the use process. It is not suitable for surgical treatment of larger cavity lesions in human organs. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, achieve a better blocking effect of the balloon catheter, prevent leakage, and facilitate the doctor's operation, the utility model provides a blocking balloon catheter assembly.

[0005] The technical solutions adopted are as follows:

[0006] A blocking balloon catheter assembly, characterized in that it includes a guide wire, a catheter and a balloon, wherein the catheter includes a catheter body having a distal end, a proximal end and a central chamber; the guide wire passes through the central chamber of the catheter body, the balloon is sleeved on the distal end of the catheter body and is communicated with the central chamber of the catheter body; the guide wire has a blocking section located at the distal end of the guide wire, and the catheter has a distal blocking section located at the distal end of the balloon; an elastic interference fit is formed between the blocking section of the guide wire and the distal blocking section of the catheter.

[0007] According to a specific embodiment of the present invention, the diameter of the blocking section of the guidewire is larger than the inner diameter of the central cavity of the blocking portion at the distal end of the catheter.

[0008] The guide wire comprises a core wire and a coating layer arranged outside the core wire. Preferably, the coating layer is an elastic coating layer.

[0009] The distal portion of the guidewire includes a distal first portion and a distal second portion.

[0010] Preferably, the diameter of the first distal portion of the guidewire is a variable diameter structure that gradually increases from the distal end of the guidewire to the second distal portion.

[0011] Preferably, the distal second portion of the guide wire is a uniform diameter structure.

[0012] According to a specific implementation of the present invention, the blocking section of the guide wire is located at the distal second portion of the guide wire.

[0013] Preferably, the occluding segment is located within 10 cm distal to the distal second portion of the guidewire.

[0014] According to a specific embodiment of the present invention, the catheter body has at least two inner diameters, and the inner diameters increase sequentially from the distal end to the proximal end of the catheter body.

[0015] Preferably, the catheter body has three inner diameters, and the inner diameters increase sequentially from the distal end to the proximal end of the catheter body.

[0016] Preferably, the inner diameter of the distal blocking portion of the catheter body is the smallest.

[0017] Preferably, the inner diameter of the catheter body of the balloon assembly segment is larger than the inner diameter of the catheter body of the distal blocking portion thereof, and smaller than the inner diameter of the remaining portion of the catheter body.

[0018] The technical solution of the utility model has the following advantages:

[0019] A. According to a specific structure of the utility model, the guide wire and the catheter form an elastic interference fit at the blocking position, so that the blocking effect is better and there is no risk of leakage. The structure is simple and easier to manufacture, which greatly reduces the manufacturing cost.

[0020] B. According to a specific structure of the utility model, an elastic coating layer is provided on the outside of the core wire of the guide wire, and the structure of the first part of the distal end of the guide wire is a variable diameter structure with a diameter gradually increasing from the distal end to the proximal end; therefore, when the distal end of the guide wire approaches the distal end of the catheter, the two will gradually be plugged into and matched, so that the guide wire and the catheter are tightly matched, and at the same time, the elastic coating layer at the distal end of the guide wire will not damage the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present utility model, the drawings required for use in the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the catheter provided by the utility model;

[0023] Figure 2 It is a schematic diagram of the overall structure of the guide wire provided by the utility model;

[0024] Figure 3 It is a schematic diagram of the assembly structure of the guide wire and the catheter provided by the utility model;

[0025] Figure 4 yes Figure 3 Schematic diagram of the partial enlarged structure of the distal end of the guide wire;

[0026] Figure 5 yes Figure 3 Enlarged schematic diagram of the interference fit between the sealing end of the middle guide wire and the catheter.

[0027] The symbols provided in the figure are explained as follows:

[0028] 1-Guidewire

[0029] 11-core wire, 12-cladding layer

[0030] 1a-occluded segment, 1b-distal first part, 1c-distal second part

[0031] 2- Catheter

[0032] 21- catheter body, 22- through hole

[0033] 2a- Distal occlusion part

[0034] 3-Balloon. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a blocking balloon catheter assembly, including a guide wire 1 and a catheter 2, wherein the catheter 2 includes a catheter body 21 having a distal end, a proximal end and a central chamber. The guide wire 1 passes through the central chamber of the catheter body 21, and the balloon 3 is sleeved on the distal end of the catheter body 21. A through hole 22 is provided at the distal end of the catheter body 21, and the through hole 22 is provided so that the balloon 3 is connected to the central chamber of the catheter body 21, thereby realizing the inflation and deflation of the balloon 3.

[0037] like Figure 4As shown, the guide wire 1 includes a core wire 11 and a coating layer 12 arranged outside the core wire 11, wherein the core wire 11 can be made of a metal material or other suitable materials. The coating layer 12 can be an elastic coating layer, which can be composed of an elastic material, such as thermoplastic polyurethane rubber, and of course can also be other elastic materials that do not produce side effects, which will not be repeated here. The coating layer 12 can be arranged along the entire length of the core wire 11, and the coating layer 12 can also be arranged on a partial length of the core wire 11.

[0038] The guidewire 1 may be an elongated structure having a distal end and a proximal end. According to a specific embodiment of the present invention, along the length direction of the guidewire 1, the distal portion of the guidewire 1 may include at least two parts, namely, a distal first portion 1b and a distal second portion 1c; wherein the distal first portion 1b is a diameter-changing portion, and the distal second portion 1c is a portion with a uniform diameter. The diameter of the distal first portion 1b may gradually increase from the distal end of the guidewire to the distal second portion 1c, so that the guidewire 1 can smoothly pass through the distal end of the catheter 2. A blocking section 1a is also provided on the distal second portion 1c of the guidewire. According to a specific embodiment of the present invention, the blocking section 1a may be located within 10 cm of the distal end of the distal second portion 1c of the guidewire. The blocking section 1a may also be located at any suitable position of the distal second portion 1c of the guidewire. The distal blocking portion 2a of the catheter 2 is located at the distal end of the balloon 3. The diameter of the blocking section 1a of the guidewire 1 is greater than the inner diameter of the cavity of the distal blocking portion 2a of the catheter 2. When the blocking section 1a of the guidewire 1 reaches the distal blocking portion 2a of the catheter 2, an elastic interference fit is formed between the blocking section 1a of the guidewire 1 and the central chamber of this part of the catheter body, thereby achieving a close fit between the guidewire 1 and the central chamber of the catheter 2, achieving the purpose of preventing leakage and improving the blocking effect.

[0039] like Figure 1 , Figure 3 and Figure 5 As shown, the catheter 2 is a single-lumen structure. Along the length direction of the catheter body 21 , the catheter body 21 may have at least two inner diameters, which increase successively from the distal end to the proximal end of the catheter body 21 .

[0040] According to a specific embodiment of the utility model, the catheter body 21 has three inner diameters, and they increase successively from the distal end to the proximal end of the catheter body 21. Among them, the inner diameter of the distal blocking portion 2a of the catheter body 21 is the smallest, so as to facilitate assembly with the guide wire 1, thereby blocking the central chamber of the catheter body 21; at the same time, the inner diameter of the catheter body 21 at this location is smaller than the diameter of the blocking segment 1a of the guide wire 1, so as to form an elastic interference fit between the blocking segment 1a of the guide wire 1 and the chamber of the catheter body 21, thereby achieving physical blocking, and the blocking effect is better, without any risk of leakage. The inner diameter of the catheter body 21 of the balloon 3 component section is larger than the inner diameter of the catheter body 21 of the distal blocking portion 2a. The inner diameter of the rest of the catheter body 21 is larger than the inner diameter of the catheter body 21 of the distal blocking portion 2a and the balloon 3 component section.

[0041] According to a blocking balloon catheter assembly of the utility model, when in use, when the blocking section 1a of the guide wire 1 reaches the distal blocking portion 2a of the catheter 2, gas or liquid is introduced into the central chamber of the catheter 2, and the gas or liquid flows into the balloon 3 through the through hole 22, so that the balloon 3 is expanded; conversely, the guide wire 1 is withdrawn, the blocking section 1a of the guide wire 1 leaves the blocking position of the catheter 2, and the through hole 22 is connected with the central chamber of the catheter 2, so that the pressure relief of the balloon 3 can be achieved.

[0042] Anything not described in the present invention is applicable to the prior art.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. An occluding balloon catheter assembly, characterized in that: The invention comprises a guide wire (1), a catheter (2) and a balloon (3), wherein the catheter (2) comprises a catheter body (21) having a distal end, a proximal end and a central chamber; the guide wire (1) passes through the central chamber of the catheter body (21); the balloon (3) is sleeved on the distal end of the catheter body (21) and is communicated with the central chamber of the catheter body (21); the guide wire (1) has a blocking section (1a) located at the distal end of the guide wire (1); the catheter (2) has a distal blocking section (2a) located at the distal end of the balloon (3); an elastic interference fit is formed between the blocking section (1a) of the guide wire (1) and the distal blocking section (2a) of the catheter (2).

2. The occluding balloon catheter assembly according to claim 1, characterized in that: The diameter of the blocking section (1a) of the guide wire (1) is larger than the inner diameter of the central cavity of the blocking portion (2a) at the distal end of the catheter (2).

3. The occluding balloon catheter assembly according to claim 1 or 2, characterized in that: The guide wire (1) comprises a core wire (11) and a coating layer (12) arranged outside the core wire (11).

4. The occluding balloon catheter assembly according to claim 3, characterized in that: The coating layer (12) is an elastic coating layer.

5. The occluding balloon catheter assembly according to claim 4, characterized in that: The distal portion of the guide wire (1) comprises a distal first portion (1b) and a distal second portion (1c).

6. The occluding balloon catheter assembly according to claim 5, characterized in that: The diameter of the distal first portion (1b) is a variable diameter structure that gradually increases from the distal end of the guide wire (1) to the distal second portion (1c).

7. The occluding balloon catheter assembly according to claim 5, characterized in that: The distal second portion (1c) of the guide wire (1) is a uniform diameter structure.

8. The occluding balloon catheter assembly according to claim 7, characterized in that: The blocking section (1a) is located at the distal second portion (1c) of the guide wire (1).

9. The occluding balloon catheter assembly according to claim 8, characterized in that: The occluding section (1a) of the guide wire is located within 10 cm of the distal end of the second distal portion (1c) of the guide wire.

10. The occluding balloon catheter assembly according to claim 9, characterized in that: The catheter body (21) has at least two inner diameters, which increase sequentially from the distal end to the proximal end of the catheter body (21).

11. The occluding balloon catheter assembly according to claim 10, characterized in that: The catheter body (21) has three inner diameters, which increase sequentially from the distal end to the proximal end of the catheter body (21).

12. The occluding balloon catheter assembly according to claim 11, characterized in that: The distal blocking portion (2a) of the catheter body (21) has the smallest inner diameter.

13. The occluding balloon catheter assembly according to claim 12, characterized in that: The inner diameter of the catheter body (21) of the balloon (3) assembly section is larger than the inner diameter of the catheter body (21) of its distal end blocking portion (2a), and smaller than the inner diameter of the remaining portion of the catheter body (21).

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