Novel brain protection device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a novel brain protection device which comprises a catheter, a balloon conducting tube and a filter screen traction wire are arranged in the catheter, the filter screen traction wire slides in the catheter, one end of the filter screen traction wire is fixedly connected with a filter screen, the filter screen is embedded in the catheter, and the other end of the filter screen traction wire is fixedly connected with the balloon conducting tube. The filter screen is arranged on the balloon conducting tube in a sleeving manner, and the filter screen moves on the balloon conducting tube; through traction of the arranged filter screen traction wire, the filter screen moves to the outside of the catheter and opens in a blood vessel, falling calcified vascular tissue fragments are comprehensively intercepted and filtered, the filter screen traction wire is pulled outwards, the filter screen can be collected into the catheter, the filtered calcified vascular tissue fragments are wrapped, and the calcified vascular tissue fragments are taken out along with the brain protection device. And valve calcification fragments are prevented from blocking brain blood vessels.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a novel brain protection device. Background Technology

[0002] During transcatheter aortic valve replacement (TAVR), calcification / atherosclerotic plaques, damage and detachment of the valve / blood vessel tissue, or thrombus detachment from the implanted device surface can occur due to surgical instruments passing through the vascular access, balloon dilation, or valve stent release. These thrombi can also detach and obstruct cerebral blood vessels (the brachiocephalic trunk, left common carotid artery, and left subclavian artery among the three branches of the aorta).

[0003] In the prior art, CN219579142U discloses a brain protection structure and its valve delivery system, including a deformable and expandable skeleton. Balloon guide tubes are disposed through both sides of the skeleton, and a balloon dilation guidewire is disposed within each balloon guide tube. An opening and closing structure for an external balloon dilation catheter to pass through the balloon guide tube is also provided within the balloon guide tube. The skeleton is surrounded by a filter membrane, the outer surface of which is coated with an anticoagulant heparin coating. The valve delivery system includes a stent connector and the brain protection structure, which can be released into the ascending aorta. This invention is integrated into a transcatheter aortic valve replacement (TAVR) delivery system, eliminating the need for other brain protection devices during surgery, reducing the time required for instrument deployment, shortening surgical time, and improving surgical efficiency and safety. It also enables the capture of insoluble embolic substances such as calcified fragments, reducing the risk of stroke in patients.

[0004] The aforementioned patent describes a device that uses multiple pores evenly distributed on a filter membrane and an anticoagulant heparin coating on the outer surface of the filter membrane to capture insoluble embolic substances such as calcified fragments, thereby reducing the risk of stroke in patients. However, although this brain protection device can capture most valve calcified fragments, some valve calcified fragments can still enter from the side of the filter membrane and block cerebral blood vessels. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a novel brain protection device that solves the problem of cerebral vascular blockage caused by the detachment of some valve calcification fragments.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a novel brain protection device, comprising a catheter, wherein a balloon guide tube and a filter traction wire are disposed inside the catheter, the filter traction wire slides inside the catheter, one end of the filter traction wire is fixedly connected to a filter screen, the filter screen is embedded inside the catheter, the filter screen is sleeved on the balloon guide tube, and the filter screen moves on the balloon guide tube.

[0009] Preferably, one end of the balloon guide tube is fixedly connected to the balloon body, and the filter screen is located at the tail of the balloon body.

[0010] Preferably, the balloon catheter is made of PET fiber.

[0011] Preferably, the front end of the balloon body is provided with a delivery system guide wire.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, the present invention provides a novel brain protection device with the following beneficial effects:

[0014] 1. This novel brain protection device uses a filter traction wire to move the filter to the outside of the catheter and open inside the blood vessel to comprehensively intercept and filter detached valve calcification fragments. Pulling the filter traction wire outward can retract the filter into the catheter, wrapping the filtered valve calcification fragments, and remove them together with the brain protection device to prevent valve calcification fragments from blocking cerebral blood vessels. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a three-dimensional magnified structural diagram of the front end of this utility model.

[0018] Legend:

[0019] 1. Catheter; 2. Balloon catheter; 3. Delivery system guidewire; 4. Balloon body; 5. Filter screen; 6. Filter screen traction wire. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Specific implementation examples are given below.

[0022] Example 1

[0023] Please see Figures 1-2 This utility model provides a novel brain protection device, including a catheter 1. A balloon guide tube 2 and a filter traction wire 6 are disposed inside the catheter 1. The filter traction wire 6 slides inside the catheter 1. A filter screen 5 is fixedly connected to one end of the filter traction wire 6. The filter screen 5 is embedded in the catheter 1. The filter screen 5 is sleeved on the balloon guide tube 2 and moves on the balloon guide tube 2. A balloon body 4 is fixedly connected to one end of the balloon guide tube 2. The filter screen 5 is disposed at the tail end of the balloon body 4. The balloon guide tube 2 is made of PET fiber material. A delivery system guide wire 3 is provided at the front end of the balloon body 4.

[0024] Specifically, the brain protection device is delivered via the guidewire 3 through the femoral artery to the ascending aorta. The filter traction wire 6 is pushed inward to move the filter traction wire 6 to the outside of the catheter 1 and onto the balloon body 4. The balloon body 4 is inflated through the balloon guide tube 2, causing the balloon body 4 to expand, which in turn drives the filter 5 to open. The filter 5 automatically adheres to the blood vessel wall to intercept and filter detached valve calcification fragments. When removing the brain protection device, the gas inside the balloon body 4 is extracted, the balloon contracts, and the filter traction wire 6 is pulled outward to retract the filter 5 into the catheter 1 and encapsulate the detached valve calcification fragments. The filter 5 is then removed from the body along with the brain protection device.

[0025] Working principle: When using this brain protection device, the device is first inserted into the ascending aorta via the femoral artery through the delivery system guidewire 9. The filter traction wire 6 is pushed inward to move the filter traction wire 6 to the outside of the catheter 1 and onto the balloon body 4. The balloon body 4 is inflated through the balloon guide tube 2, causing the balloon body 4 to expand. This, in turn, causes the filter 5 to open and automatically adhere to the blood vessel wall, intercepting and filtering detached valve calcification fragments. When removing the brain protection device, the gas inside the balloon body 4 is extracted, the balloon contracts, and the filter traction wire 6 is pulled outward to retract the filter 5 into the catheter 1, encapsulating and collecting the detached valve calcification fragments. The device is then removed from the body along with the brain protection device.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A novel brain protection device, comprising a catheter (1), characterized in that: The catheter (1) is provided with a balloon guide tube (2) and a filter traction wire (6). The filter traction wire (6) slides in the catheter (1). One end of the filter traction wire (6) is fixedly connected to a filter screen (5). The filter screen (5) is embedded in the catheter (1). The filter screen (5) is sleeved on the balloon guide tube (2) and moves on the balloon guide tube (2).

2. The novel brain protection device according to claim 1, characterized in that: One end of the balloon guide tube (2) is fixedly connected to the balloon body (4), and the filter screen (5) is located at the tail of the balloon body (4).

3. The novel brain protection device according to claim 1, characterized in that: The balloon catheter (2) is made of PET fiber.

4. The novel brain protection device according to claim 2, characterized in that: The balloon body (4) is provided with a delivery system guide wire (3) at the front end.

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