Balloon dilatation catheter with gathering sleeve

Abstract

The utility model relates to the technical field of medical instruments, in particular to a balloon dilatation catheter with a gathering sleeve. The balloon dilatation catheter with the gathering sleeve comprises a supporting seat, the gathering sleeve, a catheter body and a balloon, the catheter body is composed of an inner tube and an outer tube coaxial with the inner tube, the near end of the inner tube is connected with a main connector of the supporting seat in a sealed mode to form a guide wire channel, and a guide wire can pass through the guide wire channel. The two ends of the balloon are in sealed connection with the far ends of the inner tube and the outer tube respectively, and meanwhile the near end of the outer tube is in sealed connection with the side connector of the supporting seat. After the balloon dilatation catheter is dilated, the balloon can be restored to the state close to the state before dilatation through the gathering sleeve, the retraction performance of the balloon is remarkably improved, and compared with a traditional balloon, the balloon is more excellent in conveying performance when dilatation operation needs to be conducted twice or multiple times, and the balloon dilatation catheter is suitable for being used for dilatation. And the risk of vascular injury possibly caused by the overlarge balloon is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a balloon dilatation catheter with a gathering sleeve. Background Art

[0002] As one of the primary instruments for endovascular interventional therapy, balloon dilatation catheters are not only used for pre-dilation and shaping of blood vessels, but also serve as a delivery platform for stents and precisely define their shape after implantation. Their importance in interventional therapy is self-evident. As a key component of balloon dilatation catheters, the balloon has always been a focus of design, development, and optimization.

[0003] However, after treating one lesion, currently available balloon dilatation catheters, despite the balloon's deflation, remain bulky, making it difficult to advance to the next lesion. This large balloon can put additional pressure on blood vessels and even damage the vessel wall, increasing the risk and complexity of the procedure. Furthermore, an overly large balloon can be difficult to operate, especially in complex surgeries involving multiple lesions, potentially prolonging the procedure and increasing patient pain.

[0004] Due to this technical limitation, existing solutions struggle to meet clinical needs. To overcome this challenge and improve the flexibility and safety of balloon dilatation catheters in treating multiple lesions, a balloon dilatation catheter with a gathering sleeve is proposed. This design aims to further reduce the balloon's volume after deflation through the gathering sleeve, thereby improving its ability to pass through narrow spaces, minimizing vascular damage, improving surgical efficiency, and reducing surgical risks. Utility Model Content

[0005] In order to overcome the shortcomings of existing balloon dilatation catheters that, after treating one lesion site, their own bulk is still large, making it difficult to smoothly enter the next lesion site, thereby increasing the risk and complexity of the operation, the technical problem of the present utility model is to provide a balloon dilatation catheter with a gathering sleeve.

[0006] The technical solution of the utility model is: a balloon dilatation catheter with a gathering sleeve, comprising a support seat, a gathering sleeve, a catheter and a balloon, the catheter consisting of an inner tube and an outer tube coaxial therewith, the proximal end of the inner tube is sealedly connected to the main joint of the support seat to form a guidewire channel for passing the guidewire, the two ends of the balloon are respectively sealedly connected to the distal ends of the inner tube and the outer tube, and at the same time, the proximal end of the outer tube is sealedly connected to the side joint of the support seat, the gathering sleeve is locked to the proximal end of the catheter, and the gathering sleeve can be pulled out with a slight force.

[0007] Furthermore, an anti-bending sheath is included. The anti-bending sheath is arranged on the support seat and wraps the gathering sleeve, and there is a certain friction between the two.

[0008] Furthermore, the anti-bend sheath has a specific hardness level so that it can resist external pressure without deformation during insertion.

[0009] Furthermore, the outer tube and the inner tube of the catheter are made of polymer materials such as block polyetheramide elastomer, nylon, or composite pipes.

[0010] Furthermore, the hardness of the outer tube and the inner tube in the catheter can remain constant or change in an orderly manner from the proximal end to the distal end.

[0011] Furthermore, the balloon adopts a double-layer structure, with an inner layer used to withstand high pressure and an outer layer to increase the flexibility of the balloon.

[0012] Beneficial Effects: 1. After expansion, the balloon dilatation catheter of the present invention can be restored to a state close to that before expansion by gathering the cannula, significantly improving the balloon's retraction performance. Compared with traditional balloons, the balloon of the present invention has superior delivery performance when secondary or multiple dilatation operations are required, greatly reducing the risk of vascular damage caused by oversized balloons. This feature enables efficient treatment of multiple target lesions in the same surgery, improving the overall efficiency and safety of the surgery.

[0013] 2. The convergent cannula design not only enhances balloon controllability but also ensures consistent and stable delivery performance over multiple uses. This means doctors can continuously dilate multiple stenotic or occluded lesions without changing the catheter, reducing surgical complexity and alleviating the patient's physical burden. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the working of the balloon of the utility model after expansion.

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the support base, anti-bend sheath, gathering sleeve, etc. of the utility model.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model, which includes the gathering sleeve, catheter, balloon, etc.

[0018] Description of the accompanying drawings: 1_support seat, 2_anti-bending sheath, 3_gathering sleeve, 4_catheter, 5_balloon. DETAILED DESCRIPTION

[0019] Reference herein to an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of such a phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] Example 1: A balloon dilatation catheter with a gathering sleeve, such as Figure 1-Figure 4 As shown, it includes a support base 1, an anti-bending sheath 2, a gathering sleeve 3, a catheter 4 and a balloon 5. The catheter 4 is composed of an inner tube and an outer tube coaxial therewith. The proximal end of the inner tube is sealedly connected to the main joint of the support base 1 to form a guidewire channel for passing the guidewire, and the inner diameter of the guidewire channel is designed to be a specific size to ensure that the guidewire passes smoothly and reduces the movement of the guidewire in the guidewire channel. The two ends of the balloon 5 are sealedly connected to the distal ends of the inner tube and the outer tube respectively, and the proximal end of the outer tube is sealedly connected to the side joint of the support base 1, thereby A pressure chamber is formed and used in conjunction with a pressurizing device to make the balloon 5 expand under pressure and retract under pressure. The balloon 5 adopts a double-layer structure, with an inner layer used to withstand high pressure and an outer layer to increase the flexibility of the balloon 5. The gathering sleeve 3 is locked at the proximal end of the catheter 4 and can be pulled out with a slight force. The anti-bending sheath 2 is set on the support seat 1 and wraps the gathering sleeve 3. There is a certain friction between the two. The anti-bending sheath 2 has a specific hardness level, which enables it to resist external pressure without deformation during insertion.

[0021] like Figure 1-Figure 3 As shown, the hardness of the outer tube and the inner tube in the catheter 4 can remain unchanged or change in an orderly manner from the proximal end to the distal end; the material of the outer tube and the inner tube in the catheter 4 is a polymer material such as block polyetheramide elastomer, nylon, or a composite tube.

[0022] During use, the device is first advanced to the target lesion under image guidance. At this point, the balloon 5 is in a collapsed and folded state, while the gathering tube 3 is positioned within the outer tube near the anti-bend sheath 2. When encountering a stenotic or occluded lesion, the device is advanced to the target site using a normal pushing method. Then, the balloon 5 is inflated and expanded by connecting to a pressurizing device, thereby dilating the stenotic blood vessel or other similar structures within the human body. After expansion, the pressure is released, deflated, and the balloon 5 is withdrawn. If there are multiple target lesions to be treated, and after treating one lesion, the balloon 5 is still bulky and difficult to access the next, the gathering tube 3 can be pulled to move it to the distal end of the catheter 4. This operation further contracts the balloon 5, reducing its outer dimensions and improving its ability to pass through the sheath again. This function of the gathering tube 3 allows the user to repeat this operation, ensuring that the balloon 5 can successfully reach other target lesions, effectively reducing the balloon 5's volume and making subsequent operations more convenient.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A balloon dilatation catheter with a gathering sleeve, characterized in that: The invention comprises a support seat (1), a gathering sleeve (3), a catheter (4) and a balloon (5). The catheter (4) is composed of an inner tube and an outer tube coaxial therewith. The proximal end of the inner tube is sealedly connected to the main joint of the support seat (1) to form a guide wire channel for passing the guide wire. The two ends of the balloon (5) are respectively sealedly connected to the distal ends of the inner tube and the outer tube. At the same time, the proximal end of the outer tube is sealedly connected to the side joint of the support seat (1). The gathering sleeve (3) is locked to the proximal end of the catheter (4). The gathering sleeve (3) can be pulled out with a slight force.

2. The balloon dilatation catheter with a gathering sleeve according to claim 1, characterized in that: It also includes an anti-bending sheath (2), which is arranged on the supporting seat (1) and wraps the gathering sleeve (3).

3. The balloon dilatation catheter with a gathering sleeve according to claim 2, characterized in that: The anti-bend sheath (2) has a specific hardness level so that it can resist external pressure without deformation during insertion.

4. The balloon dilatation catheter with a gathering sleeve according to claim 3, characterized in that: The outer tube and the inner tube in the catheter (4) are made of polymer materials such as segmented polyether amide elastomer, nylon, or composite pipes.

5. The balloon dilatation catheter with a gathering sleeve according to claim 4, characterized in that: The hardness of the outer tube and the inner tube in the catheter (4) can remain constant or change in an orderly manner from the proximal end to the distal end.

6. The balloon dilatation catheter with a gathering sleeve according to claim 5, characterized in that: The balloon (5) adopts a double-layer structure, wherein the inner layer is used to withstand high pressure, and the outer layer increases the flexibility of the balloon (5).

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