CN114469437A - Anti-embolism protection device and medical instrument - Google Patents

Abstract

The invention relates to an anti-embolism protection device and a medical apparatus, wherein the anti-embolism protection device comprises a support frame, a filter element, a pushing element and a controllable element, wherein the support frame comprises a lower layer frame and an upper layer frame, the far end of the upper layer frame is connected with the lower layer frame, and the upper layer frame is provided with a proximal section bent towards the direction far away from the lower layer frame. The filtering piece is connected with the supporting frame, the pushing piece is connected with the near-end section, and the controllable piece is connected with the near end of the lower-layer frame. The anti-embolism protection device and the medical apparatus have good stability and good adherence, and can effectively avoid emboli from escaping.

Description

Anti-embolism protection device and medical instrument

Technical Field

The invention relates to the technical field of medical instruments, in particular to an anti-embolism protection device and a medical instrument.

Background

Some procedures involving the heart and aorta, such as cardiac surgery, cardiopulmonary bypass, catheter-based interventional cardiology, aortic surgery, etc., involve the formation of platelet polymers (e.g., thrombi, lipid droplets, bacterial clots and/or other foreign bodies, tumor cells or other small tissue fragments) or broken off atherosclerotic debris and debris from the arterial wall, which can be transported through the blood stream into the cerebral blood circulation and other important systemic arterial systems as embolic material for embolizing blood vessels. Embolic material entering the cerebral blood circulation can block arterioles, thereby causing local cerebral vascular embolization, which is now an important complication of cardiac and aortic surgery. While substances entering the downstream blood circulation can cause downstream organ embolism, which can lead to organ failure or organ failure.

Generally, in order to prevent complications caused by embolic material, it is often necessary to divert, capture or collect emboli such as plaque, debris or thrombus flowing anteriorly during the procedure using embolic protection devices to prevent the formation of emboli. However, the conventional embolic protection device has poor stability and adherence, and is easy to slip and dislocate in the use process, so that embolic substances escape.

Disclosure of Invention

Therefore, there is a need for an embolic protection device and a medical apparatus, wherein the embolic protection device has good stability and good adherence, and can effectively prevent emboli from escaping.

An anti-embolic protection device comprising:

the supporting frame comprises a lower layer frame and an upper layer frame, the far end of the upper layer frame is connected with the lower layer frame, and the near end of the upper layer frame is bent towards the direction far away from the lower layer frame;

a filter element coupled to the support frame;

the pushing piece is connected with the near end of the upper layer frame or the near end of the filtering piece; and the number of the first and second groups,

a controllable member connected to a proximal end of the lower frame.

In one embodiment, in the length direction of the lower frame, the distance from the connecting point of the upper frame and the lower frame to the proximal end point of the lower frame is 1/6 to 1/2 of the distance from the proximal end point of the lower frame to the distal end point of the lower frame.

In one embodiment, the upper frame has a first connection point and a second connection point connected to the lower frame, the first connection point and the second connection point are respectively disposed on two sides of a straight line from a proximal end point to a distal end point of the lower frame, and the first connection point and the second connection point are disposed axisymmetrically or asymmetrically with the straight line from the proximal end point to the distal end point of the lower frame.

In one embodiment, the included angle between the upper layer frame and the lower layer frame at the connecting point is 30-150 degrees.

In one embodiment, the distance from the proximal end point of the lower frame to the distal end point of the lower frame is smaller than the distance from the proximal end point of the upper frame to the distal end point of the lower frame.

In one embodiment, the distance from the proximal end point of the lower frame to the distal end point of the lower frame is 40mm-100 mm.

In one embodiment, the pushing member is rotatably connected to the proximal end of the upper frame or the proximal end of the filter member, and/or the controllable member is rotatably connected to the proximal end of the lower frame.

In one embodiment, the anti-embolic protection device further comprises a connector, one end of the connector is connected with the pushing member, and the other end of the connector is rotatably connected with the proximal end of the upper frame or the proximal end of the filter element.

In one embodiment, the filter element covers the proximal section and the distal section of the lower frame.

A medical device, comprising:

the above anti-embolic protection device; and the number of the first and second groups,

the conveying device comprises an outer sheath tube and a handle, the handle is connected with the outer sheath tube, and the pushing member and the controllable member are movably arranged in the outer sheath tube in a penetrating mode.

Above-mentioned anti embolic protection device is released behind the aortic arch, anti embolic protection device's lower floor frame can form the strong point with the contact position of the lower wall of aortic arch, controllable piece through the near-end connection of tractive and lower floor frame, can make the near-end of lower floor frame deflect downwards, because leverage, the distal end of lower floor frame can upwards deflect, thereby make the distal end of lower floor frame and the upper wall laminating of aortic arch inseparabler, make the adherence of filtering piece better, the thrombus escape has been avoided, the stability of anti embolic protection device in the aortic arch has also been improved. In addition, the near end of the upper frame bends towards the direction far away from the lower frame, so that the near end of the upper frame is tightly abutted with the upper wall of the aortic arch, the near end of the lower frame is abutted with the lower wall of the aortic arch, and the far end of the lower frame is abutted with the upper wall of the aortic arch, so that the anti-embolism protection device forms multi-point support in the aortic arch, the stability of the anti-embolism protection device in the aortic arch is further improved, and the displacement phenomenon of the anti-embolism protection device caused by pulsating contraction and high-flow blood scouring is avoided. Meanwhile, the pushing tube and the controllable piece can also play an anchoring role in resisting the embolic protection device, can effectively resist the displacement influence caused by the embolic protection device when a follow-up surgical instrument passes through the embolic protection device, and further improves the stability of the embolic protection device in the aortic arch.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of an anti-embolic protection device;

FIG. 2 is a schematic view of the anti-embolic protection device shown in FIG. 1 in the aortic arch;

FIG. 3 is a schematic structural view of a medical device according to an embodiment.

Description of reference numerals:

11. a lower frame 12, an upper frame 13, and a filter member; 14. a controllable component; 15. a pushing member; 21. an outer sheath; 22. a visualization conduit; 231. a first portion; 232. a second portion; 40. the aortic arch; 41. the brachiocephalic trunk artery; 42. the left common carotid artery; 43. the left subclavian artery.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1-2, fig. 1 is a schematic diagram showing the structure of an anti-embolic protection device in an embodiment of the present invention, which is used to be placed at the aortic arch 40 by a delivery device during a cardiac or aortic procedure to divert the flow of emboli generated during the procedure to filter the blood flow and prevent emboli from entering the brain. Fig. 2 shows a schematic structural diagram of the anti-embolism protection device disposed in the aortic arch 40, wherein the convex side of the aortic arch 40 is communicated with 3 larger arteries, which are sequentially divided into a brachiocephalic trunk artery 41, a left common carotid artery 42 and a left subclavian artery 43 from left to right, the anti-embolism protection device provided by this embodiment can be released to the ascending aorta and/or the aortic arch 40 and/or the descending aorta, and plays a role in filtering the ascending blood flow of the brachiocephalic trunk artery 41, the left common carotid artery 42 and the left subclavian artery 43, so as to prevent emboli generated during the operation from entering the brain through the brachiocephalic trunk artery 41, the left common carotid artery 42 and the left subclavian artery 43. Further, in order to more clearly describe the structural features of the present application, the present application uses "proximal" and "distal" as terms of orientation, wherein "proximal" refers to the end that is closer to the operator during the procedure (i.e., the end that is further from the heart after the anti-embolic protection device is released into position); by "distal" is meant the end that is distal to the operator (i.e., the end that is closer to the heart after the anti-embolic protection device is released into position).

Specifically, an embodied anti-embolic protection device comprises a support frame, a filter element 13, a pusher element 15, and a controllable element 14, wherein the support frame comprises a lower frame 11 and an upper frame 12, wherein a distal end of the upper frame 12 is connected to the lower frame 11, and a proximal end of the upper frame 12 is bent away from the lower frame 11. Wherein, the far end of the lower layer frame 11 is used for abutting with the upper wall of the aortic arch 40, the near end of the lower layer frame 11 is used for abutting with the lower wall of the aortic arch 40, and the near end of the upper layer frame 12 is used for abutting with the upper wall of the aortic arch 40, thereby the anti-embolism protection device forms multi-point support in the aortic arch 40.

Further, the filtering member 13 is connected to the supporting frame, and the filtering member 13 is used for clinging to the upper wall of the aortic arch 40 under the support of the supporting frame and covering the brachiocephalic trunk artery 41, the left common carotid artery 42 and the left subclavian artery 43, which are three blood vessels leading to the brain, so as to prevent emboli from entering the brain from the three blood vessels leading to the brain, and reduce the risk of stroke of the patient. Further, a pusher 15 is attached to the proximal end of the upper frame 12 or the proximal end of the filtering element 13, the pusher 15 being used to push the anti-embolic protection device along the aorta into the aortic arch 40. The controllable member 14 is connected to the proximal end of the lower frame 11, and the controllable member 14 is used for adjusting the angle of the anti-embolic protection device after the anti-embolic protection device is released to the aortic arch 40, so that the adherence of the anti-embolic protection device is better. Meanwhile, the controllable part 14 is used for being matched with the pushing part 15 to recover the anti-embolism protection device, specifically, when the anti-embolism protection device needs to be recovered, the controllable part 14 and the pushing part 15 are pulled simultaneously, so that the near end of the upper layer frame 12 is tightly attached to the near end of the lower layer frame 11, and the anti-embolism protection device can be smoothly recovered into the outer sheath tube 21.

Above-mentioned anti embolic protection device releases behind aortic arch 40, the contact position of lower floor's frame 11 and aortic arch 40's lower wall can form the strong point, controllable component 14 of being connected through the near-end of tractive and lower floor's frame 11, can make the near-end of lower floor's frame 11 deflect downwards, because leverage, the distal end of lower floor's frame 11 can upwards deflect, thereby make the distal end of lower floor's frame 11 and the last wall laminating of aortic arch 40 inseparabler, make the adherence of filtering piece 13 better, the thrombus escape has been avoided, the stability of anti embolic protection device in mainly attacking the aortic arch has also been improved. In addition, the near end of the upper frame 12 is bent towards the direction far away from the lower frame 11, so that the near end of the upper frame 12 is tightly abutted with the upper wall of the aortic arch 40, the near end of the lower frame 11 is abutted with the lower wall of the aortic arch 40, and the far end of the lower frame 11 is abutted with the upper wall of the aortic arch 40, so that the anti-embolism protection device forms multi-point support in the aortic arch 40, the stability of the anti-embolism protection device in the aortic arch 40 is further improved, and the displacement phenomenon of the anti-embolism protection device caused by pulse constriction and high-flow blood scouring is avoided. Meanwhile, the pushing tube and the controllable member 14 can also play an anchoring role in resisting the embolic protection device, so that the displacement influence caused by the anti-embolic protection device when a subsequent surgical instrument passes through the anti-embolic protection device can be effectively resisted, and the stability of the anti-embolic protection device in the aortic arch 40 is further improved.

Further, in the length direction of the lower frame 11, the distance from the connection point of the upper frame 12 and the lower frame 11 to the proximal end of the lower frame 11 is denoted as M, and the distance from the proximal end point of the lower frame 11 to the distal end point of the lower frame 11 is denoted as M, where M/M ranges from 1/6 to 1/2. The length direction of the lower frame 11 is the direction from the proximal end point to the distal end point of the lower frame 11. Furthermore, the included angle between the upper layer frame 12 and the lower layer frame 11 at the connecting point is 30-150 degrees, and the parameter design can enable the anti-embolism protection device to be more consistent with the inner wall structure of the aortic arch 40.

Further, the outer contour of the proximal section of the upper frame 12 is shaped as a non-closed loop structure, such as 2/3 circular, semi-elliptical, semi-heart, etc. The outer contour shape of the lower frame 11 may be a closed loop structure of different shapes consisting of any circular arcs, such as a circle, an ellipse, a heart, a drop, etc. Therefore, the upper frame 12 has a first connection point and a second connection point connected to the lower frame 11. The first connection point and the second connection point are respectively arranged on two sides of a straight line from the near-end point to the far-end point of the lower layer frame 11, and the first connection point and the second connection point are arranged in an axisymmetric or unsymmetrical manner on the straight line from the near-end point to the far-end point of the lower layer frame 11. Preferably, the distal end of the upper frame 12 is fixed to the lower frame 11 by laser welding, and preferably, the upper frame 12 further includes a distal end section connected to the lower frame 11, and further, a plurality of welding points may be disposed between the distal end section and the lower frame 11, and the plurality of welding points are disposed at intervals along the distal end section. Furthermore, the distal end section may be integrally welded to the lower frame 11. Further, the distal section and the lower frame 11 may also be connected by a socket joint.

Further, the distance from the proximal end point of the lower frame 11 to the distal end point of the lower frame 11 is smaller than the distance from the proximal end point of the upper frame 12 to the distal end point of the lower frame 11. The lower frame 11 of the anti-embolic protection device of the present application is shorter in length compared to existing anti-embolic protection devices, so that the proximal end of the lower frame 11 can abut the aortic arch 40 after releasing the anti-embolic protection device to the aortic arch 40. Preferably, the distance from the proximal end point of the lower frame 11 to the distal end point of the lower frame 11 (i.e., the length of the lower frame 11) is 40mm to 100mm, and the width of the lower frame 11 is 30mm to 75 mm.

Further, the lower frame 11 and the upper frame 12 may be formed by winding and weaving single filaments or multiple filaments, or may be formed by laser cutting a sheet or a pipe. Further, the material of the lower frame 11 and the upper frame 12 may be a metal wire such as a nickel-titanium wire, a stainless steel wire, a cobalt-based alloy wire, or a tantalum wire, and the material of the lower frame 11 and the upper frame 12 may also be a polymer material such as PEEK, HDPE, or a composite material in which metal, polymer, and inorganic nonmetal are mixed. Further, the material of the lower frame 11 and the upper frame 12 may be the same or different. Further, the number of the upper frames 12 may also be two or more, the two or more upper frames 12 are spaced from the proximal end to the distal end of the lower frame 11, and the heights of the respective upper frames 12 are sequentially reduced along the proximal end to the distal end of the lower frame 11 to form a sphere-like structure, and the filter 13 covers all the upper frames 12.

The pushing element 15 is rotatably connected with the near end of the upper frame 12 or the near end of the filtering element 13, and the controllable element 14 is rotatably connected with the near end of the lower frame 11, so that the pushing element 15 is connected with the upper frame 12 with a certain degree of freedom, and the controllable element 14 is connected with the lower frame 11 with a certain degree of freedom, thereby ensuring that the angle and the position of the embolism deflecting device can be adjusted at any time in the using process.

The near end of the lower frame 11 is provided with a circular ring or arc-shaped adapting part, and the far end of the controllable element 14 is provided with a structure such as a hook or a circular ring which is connected with the lower frame 11. Further, the controllable 14 is a wire. Preferably, the material of the controllable element 14 may be polymer material such as PET and PEEK, metal material such as nickel titanium, tantalum, cobalt-based alloy and stainless steel, or a mixture of polymer material and metal material. Further, the controllable member 14 may be formed by weaving the above-described material, or may be formed by drawing or the like. Further, the controllable element 14 may be woven from one strand of braided wire or may be woven from multiple strands of braided wire. The number of controllable members 14 may be one or more. Further, the controllable member 14 may be linear or curved with different curvatures.

Further, the anti-embolism protection device further comprises a connecting piece 151, one end of the connecting piece 151 is connected with the pushing piece 15, and the other end of the connecting piece 151 is rotatably connected with the proximal end of the upper layer frame 12 or the proximal end of the filtering piece 13. Preferably, the proximal end of the upper frame 12 is also provided with a circular or arc-shaped adapting portion, and the connecting member 151 is rotatably connected to the upper frame 12 through the adapting portion of the upper frame 12, so that the freedom degree of the upper frame 12 is ensured, and the anti-embolism protection device can more smoothly enter and exit the outer sheath 21. Preferably, the connection member 151 may be a metal filament or a polymer filament.

Further, the pushing member 15 is provided with a guide wire hole penetrating through the axial direction of the pushing member, and the guide wire hole is used for penetrating a guide wire, so that the anti-embolism protection device can enter the aortic arch 40 along the guide wire preset in the aorta. In another embodiment, the pusher 15 may also be a solid rod with a certain stiffness. Preferably, the pusher 15 may be a tube or rod of stainless steel or nickel titanium or polymer. Furthermore, the distal end of the pushing member 15 can be pre-bent, the curvature radius of the distal bent pushing member 15 is the curvature radius of the common aortic arch 40 type, and the distal bent pushing member can adapt to the shape of the aortic arch 40 by setting different bending angles, so that the device can be attached to the wall more in the delivery process.

Further, referring to fig. 1-2, the distal end of the pusher member 15 is provided with a flexible segment, such as a helical machined structure or a design having a thin distal end and a thick proximal end, such that the distal end of the pusher member 15 forms the flexible segment. The flexible section of the pusher 15 enables the pusher 15 to freely adapt to the curvature of the vessel at the aortic arch 40 and to fit against the upper wall of the aortic arch 40. Further, the flexible section at the distal end of the pushing member 15 is not limited to be cut directly on the tube in a spiral manner, but can be formed by splicing a spring section made of a wire wound with the tube. Further, the distal end of the pushing member 15 may also extend along the length direction of the anti-embolism protection device and extend beyond the distal end point of the anti-embolism protection device, and the pushing member 15 abuts against the filtering member 13, so that the filtering member 13 is supported by the pushing member 15, which is more favorable for the filtering member 13 to adhere to the inner wall of the aortic arch 40. Preferably, the pusher 15 may be a tube or rod of stainless steel, nitinol, or polymeric material.

Specifically, the filter member 13 covers the proximal end section of the upper frame 12 and the distal end section of the lower frame 11. Preferably, the filter member 13 and the upper frame 12 or the lower frame 11 are connected to each other by one or more of sewing, gluing, heat pressing, ultrasonic welding, laser welding, high frequency welding, etc

Further, the filter element 13 may be pre-shaped in an arch-shaped configuration, and the filter element 13 may be in a planar configuration supported by the pushing member 15 to form the arch-shaped configuration. Further, filter 13 can be a single layer filter 13, thereby reducing the material consumption and cost. In other embodiments, the filter member 13 may also include at least two layers of mesh staggered filter members 13 to improve the filtering effect of the filter member 13. Further, at least two layers of filter elements 13 may be stacked and bonded by means of sewing, laser welding, glue bonding, or hot pressing. Further, the mesh size of the filter element 13 may be 50 μm to 250 μm, further 60 μm to 200 μm, and preferably 100 μm to 150 μm, so as to block the thrombus and ensure that the blood flow rate is not affected.

Further, the filter member 13 is woven from a wire or laser-punched or punched from a sheet material, such as a polymer material such as PET (Polyethylene terephthalate), PEEK (polyether ether ketone), PA (Polyamide, nylon) or other non-polymer material. But also a wire mesh of nickel titanium, stainless steel, tantalum, etc., it is preferred that the filter element 13 is an elastic membrane material, e.g. the material of the filter element 13 is an elastic material, e.g. a knitted PET membrane, so that the elastic membrane material can be stretched when the anti-embolic protection device is retracted inside the outer sheath 21, and the elastic membrane can be restored to its original shape when the anti-embolic protection device is released out of the outer sheath 21. Compared with the filtering piece 13 using the non-elastic membrane material, the filtering piece 13 using the elastic membrane material can reduce the usage amount of the membrane material, thereby reducing the whole volume of the anti-embolism protection device and enabling the anti-embolism protection device to enter the outer sheath tube 21 more easily.

Further, the surface of the filter member 13 is provided with an anticoagulant coating. Preferably, the anticoagulant coating comprises an anticoagulant such as heparin, an anticoagulant, or the like, to prevent thrombus from accumulating and clogging filter element 13 during surgery. The anticoagulant coating may be formed on the surface of the filter member 13 by a process such as dip coating or spray coating. In other embodiments, the filter element 13 may also be made of a material having an anti-clotting drug.

Further, referring to fig. 3, an embodiment of the present application also provides a medical device. In particular, the medical device of an embodiment includes the anti-embolic protection device of any of the embodiments described above, and a delivery device for delivering the anti-embolic protection device from the femoral vascular tract into the aortic arch 40. The conveying device comprises an outer sheath tube 21 and a handle, the handle is connected with the outer sheath tube 21, and the pushing part 15 and the controllable part 14 are movably arranged in the outer sheath tube 21 in a penetrating mode. Further, the handle comprises a movable first part 231 and a movable second part 232, the sheath 21 is connected with the first part 231, the pushing element 15 and the controllable element 14 are movably arranged in the sheath 21 in a penetrating manner, and the proximal end of the pushing element 15 and the proximal end of the controllable element 14 are connected with the second part 232, so that the pushing element 15 and the controllable element 14 can be pulled by the second part 232 of the handle to retract the anti-embolism protection device into the sheath 21, or the pushing element 15 can be pushed by the second part 232 of the handle to push the anti-embolism protection device out of the sheath 21.

Specifically, during delivery, the anti-embolic protection device is retracted within the sheath 21, thereby facilitating delivery of the anti-embolic protection device to the aortic arch 40. When the anti-embolic protection device is delivered to a target location in the aortic arch 40, the anti-embolic protection device is released to the aortic arch 40 into an expanded state by pushing the second portion 232 of the handle to move the outer sheath 21 relative to the pusher 15. When the procedure is completed, the anti-embolic protection device is again retracted within the outer sheath 21 by pulling on the second portion 232 of the handle to move the outer sheath 21 relative to the pusher 15 and the controllable element 14.

Further, referring to fig. 2, the conveying device may further include a developing catheter 22, and the handle is further provided with an inlet (not shown) of the developing catheter 22, through which the developing catheter 22 is movably disposed in the sheath 21 and can move synchronously with the pushing member 15. The visualization catheter 22 can be imaged by a medical imaging device to facilitate the physician in confirming the positioning of the anti-embolic protection device and the delivery device during the surgical procedure.

Above-mentioned medical instrument passes through conveyor and releases anti embolic protection device to aortic arch 40 back, anti embolic protection device's lower floor frame 11 can form the strong point with the contact position of the lower wall of aortic arch 40, controllable piece 14 of being connected through the near-end of tractive and lower floor frame 11, can make the near-end of lower floor frame 11 deflect downwards, because leverage, the distal end of lower floor frame 11 can deflect upwards, thereby make the distal end of lower floor frame 11 and the upper wall laminating of aortic arch 40 inseparabler, make the adherence of filtering piece 13 better, the thrombus escape has been avoided, the stability of anti embolic protection device in the main attack aortic arch has also been improved. In addition, the near end of the upper frame 12 is bent towards the direction far away from the lower frame 11, so that the near end of the upper frame 12 is tightly abutted with the upper wall of the aortic arch 40, and then the near end of the lower frame 11 is abutted with the lower wall of the aortic arch 40, and the far end of the lower frame 11 is abutted with the upper wall of the aortic arch 40, so that the anti-embolism protection device forms multi-point support in the aortic arch 40, the stability of the anti-embolism protection device in the aortic arch 40 is further improved, and the displacement phenomenon of the anti-embolism protection device caused by pulsating contraction and high-flow blood scouring is avoided. Meanwhile, the pushing tube and the controllable member 14 can also play an anchoring role in resisting the embolic protection device, so that the displacement influence caused by the anti-embolic protection device when a subsequent surgical instrument passes through the anti-embolic protection device can be effectively resisted, and the stability of the anti-embolic protection device in the aortic arch 40 is further improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. An anti-embolic protection device, comprising:

the supporting frame comprises a lower layer frame and an upper layer frame, the far end of the upper layer frame is connected with the lower layer frame, and the near end of the upper layer frame is bent towards the direction far away from the lower layer frame;

a filter element connected to the support frame;

the pushing piece is connected with the near end of the upper layer frame or the near end of the filtering piece; and the number of the first and second groups,

a controllable member connected to a proximal end of the lower frame.

2. The anti-embolic protection device of claim 1, wherein the distance from the point of connection of the upper frame to the lower frame to the proximal end point of the lower frame in the length direction of the lower frame is 1/6 to 1/2 of the distance from the proximal end point of the lower frame to the distal end point of the lower frame.

3. The embolic protection device of claim 1, wherein the upper frame has a first connection point and a second connection point connected to the lower frame, the first connection point and the second connection point are respectively disposed on two sides of a straight line from a proximal end point to a distal end point of the lower frame, and the first connection point and the second connection point are disposed axisymmetrically or asymmetrically with respect to the straight line from the proximal end point to the distal end point of the lower frame.

4. The anti-embolic protection device of claim 1, wherein the angle between the upper frame and the lower frame at the point of connection is 30 ° -150 °.

5. The anti-embolic protection device of claim 1, wherein a distance from a proximal end point of the lower frame to a distal end point of the lower frame is less than a distance from a proximal end point of the upper frame to a distal end point of the lower frame.

6. The anti-embolic protection device of claim 1, wherein the distance from the proximal end point of the lower frame to the distal end point of the lower frame is 40mm-100 mm.

7. The embolic protection device of claim 1, wherein the pusher member is rotatably coupled to the proximal end of the upper frame or the proximal end of the filter member, and/or the controllable member is rotatably coupled to the proximal end of the lower frame.

8. The embolic protection device of claim 1, further comprising a connector, wherein one end of the connector is connected to the pusher member and the other end of the connector is rotatably connected to the proximal end of the upper frame or the proximal end of the filter element.

9. The embolic protection device of claim 1, wherein the filter element covers the proximal section of the upper frame and the distal section of the lower frame.

10. A medical device, comprising:

an anti-embolic protection device as in any of the preceding claims 1-9; and the number of the first and second groups,

the conveying device comprises an outer sheath tube and a handle, the handle is connected with the outer sheath tube, and the pushing member and the controllable member are movably arranged in the outer sheath tube in a penetrating mode.

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