Balloon catheter

Abstract

The utility model relates to the technical field of medical catheters, in particular to a balloon catheter which comprises a balloon body, a retraction net body and a connecting ring. The balloon body is located in the retraction net body, and the connecting ring is connected with the retraction net body. The balloon retraction net further comprises hoop pieces used for hooping the two ends of the balloon body, one end of each hoop piece is connected with the retraction net body, and the other end of each hoop piece is connected with the connecting ring. The hoop pieces are arranged between the connecting ring and the retraction net body and located at the two ends of the balloon body, when the balloon body is filled with a working medium and expands, the two ends of the balloon body can protrude out of the retraction net body and enter the position between the retraction net body and the connecting ring, at the moment, the hoop pieces can press the two ends of the balloon body, and therefore the balloon body can be retracted. The two ends of the balloon body are prevented from excessively protruding.

Description

Technical Field

[0001] The utility model relates to the technical field of medical catheters, and more specifically, to a balloon catheter. Background Art

[0002] Interventional therapy is a minimally invasive treatment using modern high-tech means. Under the guidance of medical imaging equipment, special catheters, guide wires and other precision instruments are introduced into the human body for the diagnosis and local treatment of internal diseases.

[0003] Large-caliber catheters such as aspiration catheters or distal access catheters are currently commonly used interventional medical devices. They can directly perform aspiration treatment on occluded blood vessels, and can extract substances such as thrombus, clot and debris in the artery out of the patient's body, so as to restore the normal blood flow in the patient's blood vessels. If the aspiration fails or the blood clot position in the blood vessel cannot be reached, it can also provide a good passage for subsequent operations, reduce the time for the patient to undergo thrombectomy surgery, and improve the operability and efficiency of the interventional surgery.

[0004] There is a prior balloon-assisted catheter and its usage method. The balloon-assisted catheter includes an auxiliary catheter and a balloon for assisting the large-caliber catheter to pass through the bifurcated blood vessel port. The balloon is arranged on the auxiliary catheter, and a passage communicating with the balloon is arranged on the auxiliary catheter. The working medium can be filled into the balloon or extracted from the balloon through the passage, so that the balloon expands or contracts. The outer surface of the balloon is provided with a retraction net that can deform with the expansion and contraction of the balloon.

[0005] In the above-mentioned existing balloon catheter, the retraction net is composed of a main body, a connecting ring for sleeving on the catheter, and a connecting rod for connecting the connecting ring and the main body. The balloon is located in the main body, and the connecting rod and the connecting ring are both located at both ends of the main body. When the above balloon catheter is in use, if the shape of the balloon is relatively flat and long, when the balloon is filled with the working medium, both ends of the balloon will expand beyond the connecting rod, as Figure 1 shown, and this situation will affect subsequent operations. Summary of the Utility Model

[0006] The utility model provides a balloon catheter to overcome the problem that both ends of the balloon of the above-mentioned existing balloon catheter expand excessively when the balloon is filled with the working medium.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is: a balloon catheter, including a balloon body, a retraction net main body and a connecting ring; the balloon body is located in the retraction net main body, and the connecting ring is connected to the retraction net main body; it also includes a clamping member for clamping both ends of the balloon body, one end of the clamping member is connected to the retraction net main body, and the other end is connected to the connecting ring.

[0008] Filling the balloon body with fluid or extracting the fluid from the balloon body can cause the balloon body to expand or contract. When the balloon body expands, the retractable net body can be stretched open. When the balloon body contracts, the retractable net body can retract and reset under the action of its own elastic force. During use, when the large-caliber catheter moves to the bifurcated blood vessel port, the inflated balloon can play a good guiding role for the large-caliber catheter, which can effectively prevent the large-caliber catheter port from hitting the bifurcated blood vessel wall, making it easier for the large-caliber catheter to pass through the bifurcated blood vessel port smoothly and efficiently, while also reducing damage to the blood vessel wall. When the balloon body contracts, the retractable net body shapes and restrains the balloon, allowing the balloon body to smoothly return to its original shape. The connecting ring is used to be sleeved on the auxiliary catheter. Since the diameter of the auxiliary catheter is smaller than the minimum diameter of the balloon, the connecting ring can prevent the retraction net body from falling off the balloon body; the hoop member is arranged between the connecting ring and the retraction net body, and is located at both ends of the balloon body. When the balloon body is filled with working fluid and expands, the two ends of the balloon body will protrude from the retraction net body and enter the position between the retraction net body and the connecting ring. At this time, the hoop member will press the two ends of the balloon body to prevent the two ends of the balloon body from protruding too much.

[0009] Furthermore, the hoop member is strip-shaped and arc-shaped.

[0010] Furthermore, the hoop member includes a first hoop bar and a second hoop bar; the first hoop bar and the second hoop bar are cross-arranged.

[0011] Furthermore, the first hoop strip and the second hoop strip are both arc-shaped.

[0012] Furthermore, the clamp is in an "S" shape.

[0013] Furthermore, the hoop member includes a connecting portion and a hoop portion; the connecting portion is arranged at both ends of the hoop portion and is respectively connected to the retractable net main body and the connecting ring; the hoop portion is in an "S" shape.

[0014] Furthermore, the clamp portion is in the shape of a Chinese character "口".

[0015] Furthermore, it also includes a hoop, which is arranged at both ends of the retractable net body, one end of the hoop is connected to the hoop, and the other end is connected to the connecting ring.

[0016] Furthermore, the cross section of the hoop member is square.

[0017] Furthermore, the clamping hoop is a nickel-titanium alloy clamping hoop.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. Filling the balloon body with fluid or extracting the fluid from the balloon body can make the balloon body expand or contract. When the balloon body expands, the retractable net body can be stretched open. When the balloon body contracts, the retractable net body can retract and reset under the action of its own elastic force. During use, when the large-caliber catheter moves to the bifurcated blood vessel port, the inflated balloon can play a good guiding role for the large-caliber catheter, which can effectively prevent the large-caliber catheter port from hitting the bifurcated blood vessel wall, making it easier for the large-caliber catheter to pass through the bifurcated blood vessel port smoothly and efficiently, while also reducing damage to the blood vessel wall. When the balloon body contracts, the retractable net body shapes and restrains the balloon, allowing the balloon body to smoothly return to its original shape. The connecting ring is used to be sleeved on the auxiliary catheter. Since the diameter of the auxiliary catheter is smaller than the minimum diameter of the balloon, the connecting ring can prevent the retractable net body from falling off the balloon body; the hoop is arranged between the connecting ring and the retractable net body, and is located at both ends of the balloon body. When the balloon body is filled with working fluid and expands, the two ends of the balloon body will protrude from the retractable net body and enter the position between the retractable net body and the connecting ring. At this time, the hoop will press the two ends of the balloon body to prevent the two ends of the balloon body from protruding too much;

[0020] 2. By setting the hoop member to be arc-shaped, the length of the hoop member can be increased as much as possible within the limited distance between the retractable net body and the connecting ring, thereby increasing the contact area between the hoop member and the balloon body, thereby improving the effect of the hoop member restraining the balloon body;

[0021] 3. By setting the hoop member as the first hoop bar and the second hoop bar, and the first hoop bar and the second hoop bar are arranged crosswise, a larger restraining force can be applied to the balloon body at the intersection of the first hoop bar and the second hoop bar, thereby better restraining the balloon body;

[0022] 4. By setting the hoop member in an "S" shape, not only can the contact area between the hoop member and the balloon body be greatly increased, but also the force can be evenly applied to the balloon body to avoid damage to the balloon body;

[0023] 5. By setting the cross section of the hoop to a rectangle, the hoop is made into a flat strip as a whole, thereby greatly increasing the contact area between the hoop and the balloon body, preventing the balloon body from being "strangled" by the hoop and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a balloon catheter in the prior art;

[0025] Figure 2 This is a schematic diagram of the overall structure of a balloon catheter according to Embodiment 1 of the utility model;

[0026] Figure 3It is a schematic structural diagram of a clamping member in Embodiment 1 of a balloon catheter of the present utility model;

[0027] Figure 4 It is a schematic structural diagram of a clamping member in Embodiment 2 of a balloon catheter of the present utility model;

[0028] Figure 5 It is a schematic overall structural diagram of Embodiment 3 of a balloon catheter of the present utility model;

[0029] Figure 6 It is a schematic structural diagram of a clamping member in Embodiment 4 of a balloon catheter of the present utility model;

[0030] Figure 7 It is a schematic structural diagram of a clamping member in Embodiment 5 of a balloon catheter of the present utility model.

[0031] In the drawings: 1. Balloon body; 2. Retraction net main body; 3. Connection ring; 4. Clamping member; 401. First hoop strip; 402. Second hoop strip; 403. Connection part; 404. Clamping part; 5. Auxiliary catheter; 6. Hoop ring. Detailed implementation manners

[0032] The drawings are only for illustrative purposes and should not be construed as limiting the present patent; for better illustrating this embodiment, some components in the drawings may be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and should not be construed as limiting the present patent.

[0033] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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, so the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The technical solutions of the present utility model will be further specifically described below through specific embodiments in conjunction with the drawings:

[0035] Embodiment 1

[0036] Refer to Figure 2 and Figure 3, is Example 1 of a balloon catheter of the utility model, comprising a balloon body 1, a retractable net body 2 and a connecting ring 3; the balloon body 1 is located in the retractable net body 2, and the connecting ring 3 is connected to the retractable net body 2; it also includes a clamping member 4 for clamping the two ends of the balloon body 1, one end of the clamping member 4 is connected to the retractable net body 2, and the other end is connected to the connecting ring 3.

[0037] The two ends of the balloon body 1 are connected with auxiliary catheters 5, through which the working medium can be introduced into the balloon body 1 or the working medium can be extracted. The material of the balloon body 1 can be rubber, silicone, polyurethane, nylon, PEBAX or other polymer materials. In this embodiment, the material of the balloon body 1 is rubber. When the balloon body 1 is filled with working medium, the middle part is cylindrical and the two ends are hemispherical. The working medium filled into the balloon body 1 can be saline, contrast agent, etc. In this embodiment, the working medium filled into the balloon body 1 is saline. The retracting net body 2 is a wire mesh with retracting elastic force. The retracting net body 2 is tightly sleeved on the outer surface of the balloon body 1 by its own elastic force. The material of the retracting net body 2 is nickel-titanium alloy. The retracting net body 2 is obtained by cutting and post-processing a nickel-titanium tube of suitable size. The retracting net body 2 is evenly distributed with grids. When the retracting net body 2 is expanded with the balloon body 1, the grid on the retracting net body 2 is rhombus-shaped.

[0038] Filling the balloon body 1 with a working fluid or extracting the working fluid from the balloon body 1 can cause the balloon body 1 to expand or contract. When the balloon body 1 expands, the retractable net body 2 can be stretched open. When the balloon body 1 contracts, the retractable net body 2 can retract and reset under the action of its own elastic force. During use, when a large-caliber catheter moves to the bifurcated blood vessel port, the inflated balloon can play a good guiding role for the large-caliber catheter, and can effectively avoid the situation where the large-caliber catheter port hits the bifurcated blood vessel wall, making it easier for the large-caliber catheter to pass through the bifurcated blood vessel port smoothly and efficiently, while also reducing damage to the blood vessel wall. When the balloon body 1 contracts, the retractable net body 2 shapes and restrains the balloon, so that the balloon body 1 can smoothly return to its original shape. The connecting ring 3 is used to be sleeved on the auxiliary catheter 5. Since the diameter of the auxiliary catheter 5 is smaller than the minimum diameter of the balloon, the connecting ring 3 can prevent the retractable net body 2 from falling off the balloon body 1; the hoop member 4 is arranged between the connecting ring 3 and the retractable net body 2, and is located at both ends of the balloon body 1. When the balloon body 1 is filled with working fluid and expands, the two ends of the balloon body 1 will protrude from the retractable net body 2 and enter the position between the retractable net body 2 and the connecting ring 3. At this time, the hoop member 4 will press the two ends of the balloon body 1 to prevent the two ends of the balloon body 1 from protruding too much.

[0039] In this embodiment, the hoop member 4 includes a first hoop strip 401 and a second hoop strip 402; the first hoop strip 401 and the second hoop strip 402 are arranged in a cross shape. Specifically, there are four hoop members 4, and the hoop members 4 are evenly distributed circumferentially around the connecting ring 3. By setting the hoop member 4 as the first hoop strip 401 and the second hoop strip 402, and the first hoop strip 401 and the second hoop strip 402 are arranged in a cross shape, a relatively large binding force can be exerted on the balloon body 1 at the cross position of the first hoop strip 401 and the second hoop strip 402, and thus the balloon body 1 can be better bound.

[0040] In this embodiment, both the first hoop strip 401 and the second hoop strip 402 are arc-shaped. By setting both the first hoop strip 401 and the second hoop strip 402 as arc-shaped, the lengths of the first hoop strip 401 and the second hoop strip 402 can be increased as much as possible within the limited distance between the retraction net body and the connecting ring 3, so that the contact area between the first hoop strip 401, the second hoop strip 402 and the balloon body 1 can be increased, and thus the effect of the hoop member 4 binding the balloon body 1 can be improved.

[0041] In this embodiment, the material of the hoop member 4 is medical rubber.

[0042] In this embodiment, a hoop 6 is further included. The hoop 6 is arranged at both ends of the retraction net body. One end of the hoop member 4 is connected to the hoop 6, and the other end is connected to the connecting ring 3. The hoop 6 and the retraction net main body 2 are integrally formed. The hoop 6 can stabilize the relative position between the retraction net and the balloon body 1 and prevent relative slippage between the retraction net main body 2 and the balloon body 1.

[0043] Embodiment 2

[0044] Referring to Figure 4 , this is Embodiment 2 of a balloon catheter of the present utility model. The difference between this embodiment and Embodiment 1 is that the hoop member 4 is strip-shaped and the hoop member 4 is arc-shaped. Specifically, the number of hoop members 4 is four, and the four hoop members 4 are evenly arranged circumferentially around the connecting ring 3. By setting the hoop member 4 as arc-shaped, the length of the hoop member 4 can be increased as much as possible within the limited distance between the retraction net body and the connecting ring 3, so that the contact area between the hoop member 4 and the balloon body 1 can be increased, and thus the effect of the hoop member 4 binding the balloon body 1 can be improved.

[0045] Embodiment 3

[0046] Referring to Figure 5 , this is Embodiment 3 of a balloon catheter of the present utility model. The difference between this embodiment and Embodiment 1 is that the hoop member 4 is in an "S" shape. By setting the hoop member 4 in an "S" shape, not only can the contact area between the hoop member 4 and the balloon body 1 be greatly increased, but also the force can be evenly exerted on the balloon body 1 to avoid damage to the balloon body 1.

[0047] In this embodiment, the cross-section of the hoop member 4 is square. The hoop member 4 is integrally strip-shaped, which can greatly increase the contact area between the hoop member 4 and the balloon body 1, and prevent the balloon body 1 from being "strangled" by the hoop member 4 and damaged. In this embodiment, the material of the hoop member 4 is nickel-titanium alloy, which has better rigidity than rubber material and better binding effect on the balloon body 1.

[0048] Embodiment 4

[0049] Refer to Figure 6 , which is Embodiment 4 of a balloon catheter of the present utility model. The difference between this embodiment and Embodiment 1 is that the hoop member 4 includes a connecting portion 403 and a hoop portion 404; the connecting portion 403 is provided at both ends of the hoop portion 404 and is respectively connected to the retraction mesh body 2 and the connecting ring 3; the hoop portion 404 is in an "S" shape. Specifically, the connecting portion 403 is straight, and both ends of the hoop portion 404 are respectively connected to the two connecting portions 403.

[0050] Embodiment 5

[0051] Refer to Figure 7 , which is Embodiment 5 of a balloon catheter of the present utility model. The difference between this embodiment and Embodiment 4 is that the hoop portion 404 is in a "square" shape. The "square"-shaped hoop portion 404 has a better binding effect than the "S"-shaped hoop portion 404.

[0052] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill 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 manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A balloon catheter, comprising a balloon body (1), a retractable mesh body (2) and a connecting ring (3); the balloon body (1) is located in the retractable mesh body (2), and the connecting ring (3) is connected to the retractable mesh body (2); characterized in that: It further includes a hoop member (4) for the two ends of the balloon body (1) of the hoop. One end of the hoop member (4) is connected to the retraction net main body (2), and the other end is connected to the connecting ring (3).

2. The balloon catheter according to claim 1, characterized in that: The hoop member (4) is strip-shaped and arc-shaped.

3. The balloon catheter according to claim 1, characterized in that: The hoop member (4) includes a first hoop strip (401) and a second hoop strip (402); the first hoop strip (401) and the second hoop strip (402) are arranged in a crosswise manner.

4. The balloon catheter according to claim 3, characterized in that: Both the first hoop strip (401) and the second hoop strip (402) are arc-shaped.

5. The balloon catheter according to claim 1, characterized in that: The hoop member (4) is in an "S" shape.

6. The balloon catheter according to claim 1, characterized in that: The hoop member (4) includes a connecting portion (403) and a hoop portion (404); the connecting portion (403) is provided at both ends of the hoop portion (404) and is respectively connected to the retraction net main body (2) and the connecting ring (3); the hoop portion (404) is in an "S" shape.

7. The balloon catheter according to claim 6, characterized in that: The hoop portion (404) is in a "mouth" shape.

8. The balloon catheter according to claim 1, characterized in that: It further includes a hoop (6), the hoop (6) is provided at both ends of the retraction net body, one end of the hoop member (4) is connected to the hoop (6), and the other end is connected to the connecting ring (3).

9. The balloon catheter according to any one of claims 1 to 8, characterized in that: The cross-section of the hoop member (4) is square.

10. The balloon catheter according to claim 5 or 6, characterized in that: The hoop member (4) is a nitinol alloy hoop member (4).

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