Dual lumen catheter cerebral embolic protection device

Abstract

The utility model discloses a double -cavity catheter cerebral embolism protection device, double -cavity catheter cerebral embolism protection device includes: double -cavity catheter, protector and guide wire, double -cavity catheter includes outer layer pipe body and inner partition, double -cavity catheter is divided into guide wire cavity and protector cavity through inner partition, the guide wire cavity is slidably arranged in the guide wire cavity, the protector includes protection silk, the distal end of protection silk is provided with protection filter screen, the protector is slidably arranged in the protector cavity, and the protection filter screen is preloaded in the distal end of protector cavity, the utility model discloses under the premise of not harming blood vessel, has improved the efficiency of protector implantation blood vessel greatly.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a double-lumen catheter cerebral embolism protection device. Background Technology

[0002] In interventional cardiovascular and peripheral vascular surgeries, various emboli (such as mural thrombi in the heart, atherosclerotic plaques in arteries, calcification of valves, or tissue debris) can migrate within the blood vessels due to the surgical procedure. This can lead to serious complications such as vascular embolism or even stroke. For example, carotid artery stenting for treating carotid atherosclerotic stenosis and transcatheter aortic replacement for treating aortic stenosis have both observed significant stroke rates in clinical practice. Therefore, placing an embolic protection device downstream of the surgical vessel can prevent stroke and various vascular embolisms. Thus, embolic protectors have been developed, which can effectively intercept and filter various emboli, thereby preventing stroke and various vascular embolisms.

[0003] However, existing embolization protector structures typically require a guidewire to first enter the blood vessel, then a delivery sheath (catheter) to be placed guided by the guidewire, followed by the withdrawal of the guidewire, and finally the placement of the filter protector through the delivery sheath. This structure results in low efficiency in embolization protector placement within the blood vessel. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a double-lumen catheter cerebral embolism protection device, which aims to improve the efficiency of embolism protector placement in blood vessels.

[0005] To achieve the above objectives, this utility model provides a double-lumen catheter cerebral embolism protection device, which includes: a double-lumen catheter, a protector, and a guidewire;

[0006] The dual-lumen catheter includes an outer tube body and an inner partition wall. The dual-lumen catheter is divided into a guidewire lumen and a protector lumen by the inner partition wall. The guidewire lumen is slidably inserted into the guidewire lumen. The protector includes a protective wire, and a protective filter is provided at the distal end of the protective wire. The protector is slidably inserted into the protector lumen, and the protective filter is pre-loaded at the distal end of the protector lumen.

[0007] Optionally, the diameter of the guidewire is smaller than the inner diameter of the guidewire cavity, and the inner wall of the guidewire cavity is coated with a first lubricating coating, which is used to reduce the coefficient of friction between the guidewire and the inner wall of the guidewire cavity to less than or equal to 0.1.

[0008] Optionally, the dual-lumen catheter cerebral embolism protection device further includes: a pusher, which is detachably connected to the proximal end of the protective wire. The pusher is used to move the protector so that the protective filter moves out of the protector cavity in a relaxed state, or moves the protective filter into the protector cavity in a contracted state.

[0009] Optionally, the protective filter is woven from a shape memory material filament and is shaped like an angled funnel to filter plugs.

[0010] Optionally, the inner wall of the protector cavity is coated with a second lubricating coating, which is used to reduce the coefficient of friction between the protector and the inner wall of the protector cavity.

[0011] Optionally, a shrink ring is provided on the opening side of the protective filter screen, the shrink ring being used to shrink the opening of the protective filter screen to prevent the embolus from escaping.

[0012] Optionally, the proximal end of the dual-lumen catheter is connected to a bifurcated tube, the outlet end of the first bifurcated tube of the bifurcated tube is connected to the guidewire lumen, and the outlet end of the second bifurcated tube of the bifurcated tube is connected to the protector lumen.

[0013] The inlet end of the first branch tube is threadedly connected to a first knob cap. The body of the first branch tube is provided with a first receiving cavity corresponding to the first knob cap. A first elastic rubber ring is provided in the first receiving cavity. The first knob cap is provided with a first pushing terminal in the first receiving cavity along the radial direction. A guide wire channel corresponding to the guide wire cavity is opened on the first pushing terminal.

[0014] The inlet end of the second branch pipe is threadedly connected to a second knob cap. The body of the second branch pipe is provided with a second receiving cavity corresponding to the second knob cap. A second elastic rubber ring is provided in the second receiving cavity. The second knob cap is provided with a second pushing terminal in the second receiving cavity along the radial direction. A protector channel corresponding to the protector cavity is opened on the second pushing terminal.

[0015] The beneficial effects of this utility model are as follows: 1. In the process of use, the guidewire is inserted into the guidewire cavity, the protector is slidably inserted into the protector cavity, and the protective filter is pre-loaded at the distal end of the protector cavity. First, the guidewire is inserted into the target blood vessel through the guidewire cavity, and then the double-lumen catheter is guided into the target blood vessel through the guidewire. When the double-lumen catheter reaches the target position, the protector is pushed so that the protective filter leaves the protector cavity to filter various emboli in the blood vessel. Compared with the prior art, the structure of this utility model does not require the guidewire to be withdrawn and then the protector to be loaded and transported during use, reducing the protection device placement time and improving the efficiency of protection device placement in blood vessels. 2. The guidewire of this utility model does not need to be withdrawn. This allows the double-lumen catheter to be directly guided to the new target position through the guidewire when a new position needs to be changed, without the need to reinsert the guidewire. This greatly improves the flexibility of the protector. 3. This utility model can effectively fix the guidewire and protector by setting a knob cap and other structures, avoiding adverse effects caused by the movement of the two.

[0016] In summary, this invention greatly improves the efficiency of inserting the protector into the blood vessel and increases the flexibility of using the double-lumen catheter cerebral embolism protection device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a double-lumen catheter cerebral embolism protection device according to a specific embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a double-lumen catheter according to a specific embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a branched pipe in a specific embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a second branch pipe in a specific embodiment of this utility model. Detailed Implementation

[0021] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0022] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0023] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0024] The applicant's research revealed that existing embolization protector structures typically require a guidewire to first enter the blood vessel, followed by placement of a delivery sheath (catheter) guided by the guidewire, then withdrawal of the guidewire, and finally placement of the filter protector through the delivery sheath. This structure results in low efficiency in embolization protector placement within the blood vessel.

[0025] Therefore, this utility model embodiment provides a dual-lumen catheter cerebral embolism protection device, which, as follows: Figure 1 and Figure 2 As shown, the double-lumen catheter 1 cerebral embolism protection device includes: a double-lumen catheter 1, a protector 2, and a guidewire 4;

[0026] The double-lumen catheter 1 includes an outer tube body and an inner partition wall. The double-lumen catheter 1 is divided into a guidewire lumen 11 and a protector lumen 12 by the inner partition wall. The guidewire lumen 11 is slidably inserted in the guidewire lumen 11. The protector 2 includes a protective wire, and a protective filter is provided at the distal end of the protective wire. The protector 2 is slidably inserted in the protector lumen 12, and the protective filter is pre-loaded at the distal end of the protector lumen 12.

[0027] It should be noted that this invention, through its dual-lumen structure, avoids the need to remove the guidewire 4 before inserting the protector 2. This reduces the time required for reinserting the protector 2 and significantly improves the efficiency of its placement in the blood vessel. Furthermore, since the guidewire 4 does not need to be removed, when the target position needs to be changed, the unremoved guidewire 4 can be moved directly to guide the dual-lumen catheter 1, reducing the time required for reinserting both the guidewire 4 and the protector 2 when changing the target position and increasing its flexibility.

[0028] It is worth mentioning that, in this embodiment of the utility model, the distal end refers to the end that enters the blood vessel first, and the proximal end is the opposite end of the distal end, or the end that enters the blood vessel later.

[0029] In this specific embodiment, the diameter of the guidewire 4 is smaller than the inner diameter of the guidewire cavity 11, and the inner wall of the guidewire cavity 11 is coated with a first lubricating coating. The first lubricating coating is used to reduce the coefficient of friction between the guidewire 4 and the inner wall of the guidewire cavity 11 to less than or equal to 0.1.

[0030] It should be noted that reducing the coefficient of friction between the guidewire 4 and the inner wall of the guidewire lumen 11 allows the double-lumen catheter 1 to move more smoothly along the guidewire 4, increasing the insertion efficiency of the double-lumen catheter 1 and reducing the possibility of the double-lumen catheter 1 getting stuck.

[0031] In this specific embodiment, the double-lumen catheter 1 cerebral embolism protection device further includes: a pusher, which is detachably connected to the proximal end of the protective wire. The pusher is used to move the protector 2 so that the protective filter moves out of the protector cavity 12 in a relaxed state, or moves the protective filter into the protector cavity 12 in a contracted state.

[0032] It should be noted that the pusher can ensure that the protective filter is delivered normally out of the protector cavity 12 to intercept and filter various twins.

[0033] In this specific embodiment, the protective filter is woven from a shape memory material filament and is shaped like an angled funnel for filtering plugs.

[0034] It should be noted that this shape ensures the filtration effect of the plug.

[0035] In this specific embodiment, the inner wall of the protector cavity 12 is coated with a second lubricating coating, which is used to reduce the coefficient of friction between the protector 2 and the inner wall of the protector cavity 12.

[0036] It should be noted that the second lubricating coating allows for faster transport of the protector 2, thereby improving the installation efficiency of the protector 2.

[0037] In this specific embodiment, a shrink ring is provided on the opening side of the protective filter screen. The shrink ring is used to shrink the opening of the protective filter screen to prevent the plug from escaping.

[0038] It should be noted that when the protector 2 is removed, this structure can prevent the filtered emboli from re-entering the blood vessel.

[0039] In this specific embodiment, such as Figure 1 and Figure 3 As shown, the proximal end of the double-lumen catheter 1 is connected to a bifurcated tube 3. The outlet end of the first bifurcated tube 31 of the bifurcated tube 3 is connected to the guidewire cavity 11, and the outlet end of the second bifurcated tube 32 of the bifurcated tube 3 is connected to the protector cavity 12.

[0040] The inlet end of the first branch tube 31 is threadedly connected to a first knob cap. The main body of the first branch tube 31 is provided with a first receiving cavity corresponding to the first knob cap. A first elastic rubber ring is provided in the first receiving cavity. The first knob cap is provided with a first pushing terminal in the first receiving cavity along the radial direction. A guide wire channel corresponding to the guide wire cavity 11 is opened on the first pushing terminal.

[0041] like Figure 4 As shown, the inlet end of the second branch pipe 32 is threadedly connected to a second knob cap 321. The main body of the second branch pipe 32 is provided with a second receiving cavity 322 corresponding to the second knob cap 321. A second elastic rubber ring 323 is provided in the second receiving cavity 322. The second knob cap 321 is provided with a second pushing terminal 324 radially arranged in the second receiving cavity 322. A protector channel 325 corresponding to the protector cavity 12 is opened on the second pushing terminal 324.

[0042] It should be noted that in the first bifurcation tube 31 and the second bifurcation tube 32, the downward movement of the knob cap causes the push terminal to compress the elastic ring, thereby deforming the elastic ring to wrap around the corresponding guide wire or protector, achieving a sealing effect. This structure effectively fixes the protector 2 and guide wire 4, preventing them from moving and causing injury. Simultaneously, this structure also achieves a sealing and hemostatic effect. The two bifurcation tubes have similar structures, therefore only... Figure 4 The structure of the second branch pipe 32 connected to the protector cavity 12 is shown.

[0043] Furthermore, a drug inlet pipe 33 is provided on the branch pipe 3, which is used to add the required drugs.

[0044] In this embodiment of the invention, the guidewire 4 is inserted into the guidewire cavity 11, and the protector 2 is slidably inserted into the protector cavity 12. A protective filter is pre-loaded at the distal end of the protector cavity 12. First, the guidewire 4 is inserted into the target blood vessel through the guidewire cavity 11. Then, the double-lumen catheter 1 is guided into the target blood vessel through the guidewire 4. When the double-lumen catheter 1 reaches the target position, the protector 2 is pushed forward so that the protective filter leaves the protector cavity 12 to filter various emboli in the blood vessel. Compared to the prior art, this embodiment of the invention eliminates the need to remove the guidewire 4 and then load and transport the protector 2 during use, reducing the placement time of the protector 2 and improving the efficiency of the protector 2's insertion into the blood vessel.

[0045] In this embodiment of the invention, the guidewire 4 does not need to be removed. This allows the double-lumen catheter 1 to be directly guided to the new target position via the guidewire 4 when a new position is needed, without the need to reinsert the guidewire 4. This greatly improves the flexibility of the protector 2.

[0046] This embodiment of the utility model can effectively fix the guide wire 4 and the protector 2 by setting a knob cap and other structures, so as to avoid adverse effects caused by the movement of the two.

[0047] In summary, the present invention greatly improves the efficiency of inserting the protector 2 into the blood vessel and increases the flexibility of using the double-lumen catheter 1 cerebral embolism protection device.

[0048] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A double-lumen catheter cerebral embolism protection device, characterized in that, The dual-lumen catheter cerebral embolism protection device includes: a dual-lumen catheter, a protector, and a guidewire; The dual-lumen catheter includes an outer tube body and an inner partition wall. The dual-lumen catheter is divided into a guidewire lumen and a protector lumen by the inner partition wall. The guidewire lumen is slidably inserted into the guidewire lumen. The protector includes a protective wire, and a protective filter is provided at the distal end of the protective wire. The protector is slidably inserted into the protector lumen, and the protective filter is pre-loaded at the distal end of the protector lumen.

2. The dual-lumen catheter cerebral embolism protection device according to claim 1, characterized in that, The diameter of the guidewire is smaller than the inner diameter of the guidewire cavity. The inner wall of the guidewire cavity is coated with a first lubricating coating, which is used to reduce the coefficient of friction between the guidewire and the inner wall of the guidewire cavity to less than or equal to 0.

1.

3. The double-lumen catheter cerebral embolism protection device according to claim 1, characterized in that, The dual-lumen catheter cerebral embolism protection device further includes: a pusher, which is detachably connected to the proximal end of the protective wire. The pusher is used to move the protector so that the protective filter moves out of the protector cavity in a relaxed state, or moves the protective filter into the protector cavity in a contracted state.

4. The double-lumen catheter cerebral embolism protection device according to claim 1, characterized in that, The protective filter is woven from shape memory material silk and is shaped like an angled funnel to filter plugs.

5. The double-lumen catheter cerebral embolism protection device according to claim 1, characterized in that, The inner wall of the protector cavity is coated with a second lubricating coating, which is used to reduce the coefficient of friction between the protector and the inner wall of the protector cavity.

6. The dual-lumen catheter cerebral embolism protection device according to claim 1, characterized in that, The protective filter screen has a shrink ring on its open side, which is used to shrink the opening of the protective filter screen to prevent the plug from escaping.

7. The double-lumen catheter cerebral embolism protection device according to claim 1, characterized in that, The proximal end of the dual-lumen catheter is connected to a bifurcated tube, the outlet end of the first bifurcated tube of the bifurcated tube is connected to the guidewire lumen, and the outlet end of the second bifurcated tube of the bifurcated tube is connected to the protector lumen. The inlet end of the first branch tube is threadedly connected to a first knob cap. The body of the first branch tube is provided with a first receiving cavity corresponding to the first knob cap. A first elastic rubber ring is provided in the first receiving cavity. The first knob cap is provided with a first pushing terminal in the first receiving cavity along the radial direction. A guide wire channel corresponding to the guide wire cavity is opened on the first pushing terminal. The inlet end of the second branch pipe is threadedly connected to a second knob cap. The body of the second branch pipe is provided with a second receiving cavity corresponding to the second knob cap. A second elastic rubber ring is provided in the second receiving cavity. The second knob cap is provided with a second pushing terminal in the second receiving cavity along the radial direction. A protector channel corresponding to the protector cavity is opened on the second pushing terminal.

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