CN114431997A - Anti-embolism protection device and medical instrument - Google Patents

Abstract

The invention relates to an anti-embolism protection system and an anti-embolism protection device, wherein the anti-embolism protection device comprises a support frame, a first filter piece, a second filter piece and a support piece. Wherein. The first filter piece covers the support frame. The second filter piece is positioned below the first filter piece and is connected with the first filter piece or the support frame, and the second filter piece and the first filter piece are enclosed to form a channel with openings at two ends. The support member includes a first support member connected to the distal end of the second filter element for defining the shape of the distal opening of the passageway. The anti-embolism protection device is good in stability and adherence, and can effectively prevent 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 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., emboli, lipid droplets, bacterial clots and/or other foreign matter, tumor cells or other small tissue fragments) or broken off of arterial walls from blood by surgical instruments that are transported through the blood stream into the cerebral blood circulation and other important systemic arterial systems as embolizing vascular material. Embolic material entering cerebral blood circulation can occlude arterioles, thereby causing local cerebral vascular embolization, which has become 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 emboli 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 anti-embolism protection device and a medical apparatus, which have good stability and adherence and can effectively prevent emboli from escaping.

An anti-embolic protection device comprising:

a support frame;

a first filter covering the support frame;

the second filter element is positioned below the first filter element and is connected with the first filter element or the support frame, and the second filter element and the first filter element are enclosed to form a channel with two open ends; and the number of the first and second groups,

a support comprising a first support connected to a distal end of the second filter element or the support frame for defining a shape of a distal opening of the channel.

In one embodiment, the support member further comprises a second support member connected to the proximal end of the second filter element or the support frame for defining the shape of the proximal opening of the channel.

In one embodiment, when the anti-embolic protection device is in a deployed state, the angle between the first support member and the distal side of the support frame is greater than 0 ° and less than or equal to 90 °, and the angle between the second support member and the distal side of the support frame is greater than 0 ° and less than or equal to 90 °.

In one embodiment, the distance between the connection point of the first support on the support frame and the connection point of the second support on the support frame is 40-100 mm when the anti-embolic protection device is in a deployed state.

In one embodiment, when the anti-embolism protection device is in a deployed state, the distance from the connecting point of the first supporting piece and the supporting frame to the distal end point of the supporting frame is 10mm-50mm, and the distance from the connecting point of the second supporting piece and the supporting frame to the proximal end point of the supporting frame is 10mm-50 mm.

In one embodiment, an end of the supporting member away from the supporting frame is a closed structure or is provided with an opening.

In one embodiment, the support member includes a support section connected to the second filter element and bent toward the first filter element.

In one embodiment, the support further comprises a connection section bent toward the proximal or distal end of the support frame and connected to the support frame.

In one embodiment, the first filter element and/or the second filter element is a woven or laser-perforated or elastic membrane.

In one embodiment, the surface of the first filter element and/or the second filter element is provided with an anticoagulant coating.

A medical device, comprising:

the anti-embolic protection device described above; and (c) a second step of,

the conveying mechanism comprises a pushing piece, and the pushing piece is connected with the supporting frame or the near end of the first filtering piece.

In one embodiment, the pushing member 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.

In one embodiment, the delivery mechanism further comprises an outer sheath, the pusher is movably disposed within the outer sheath, and the anti-embolic protection device is retracted within the outer sheath.

In one embodiment, the delivery mechanism further comprises a visualization catheter movably disposed through the outer sheath and moving synchronously with the pusher.

Above-mentioned anti embolism protection device and medical instrument are through setting up first filter piece on braced frame, first filter piece can cover the head arm trunk artery, the intercommunication mouth of artery and aorta under left common carotid artery and the left clavicle, thereby filter the ascending blood flow of artery under the aorta inflow head arm trunk artery, left common carotid artery and the left clavicle, prevent the embolus that produces among the operation process via head arm trunk artery, artery entering brain under left common carotid artery and the left clavicle, patient's cerebral apoplexy's risk has been reduced. Simultaneously, set up the second in the below of first filter piece and filter the piece, and make the second filter piece and first filter piece enclose to close and form the passageway that has both ends open-ended, at first filter piece and aorta bow's inner wall laminating badly or take place the displacement and can't cover the brachiocephalic trunk artery completely, when the intercommunication mouth of left common carotid artery and left subclavian artery and aorta, a large amount of blood flows in the aorta can flow into the second and filter the passageway that closes with first filter piece, when blood flows out and gets into brachiocephalic trunk artery, left common carotid artery and left subclavian artery from this global of passageway, embolus in the blood flow has been filtered by second filter piece and first filter, thereby reduced the possibility that embolus escapes and gets into brain blood vessel, the interception efficiency to the embolus has been improved, the risk of patient's cerebral apoplexy has been reduced. And when the inner wall laminating of first filter piece and aortic arch is good, first support piece also can provide certain holding power for braced frame for first filter piece still can keep closely the laminating state with the inner wall under ascending blood stream's the washing, the adherence that has improved anti embolism protection device prevents to produce the bolt escape emergence that the gap leads to between first filter piece and the inner wall, and first support piece can also anchor the aortic arch, prevent that anti embolism protection device from taking place the displacement, improved anti embolism protection device's stability. In addition, the first filter piece and the second filter piece enclose the channel that forms and can be used for follow-up surgical instruments to pass through, and the second filter piece can carry out good protection to the inner wall of aortic arch, prevents that the inner wall of aortic arch from being scratched by follow-up surgical instruments.

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 diagram of an anti-embolic protection device according to an embodiment of the present invention;

FIG. 2 is a schematic view of an anti-embolic protection device in an aortic arch according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an anti-embolic protection device according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a support frame, a first support member and a second support member of the anti-embolic protection device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a support frame, a first support member and a second support member of the anti-embolic protection device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a support frame, a first support member and a second support member of the anti-embolic protection device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of the first support/the second support according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a support frame and a first filter element according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a medical device according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of an anti-embolic protection device and a pusher according to an embodiment of the present invention;

fig. 11 is a schematic structural view of an anti-embolism protection device and a pushing member according to an embodiment of the invention.

Description of reference numerals:

10. an anti-embolic protection device; 11. a support frame; 111. a proximal end; 112. a distal end; 12. a first filter member; 13. a first support member; 131. a support section; 132. a connecting section; 133. an opening; 14. a second filter member; 141. a channel; 15. a second support member; 20. a conveying mechanism; 21. an outer sheath; 22. a pushing member; 221. a flexible section; 23. a handle; 40. the aortic arch; 41. the left subclavian artery; 42. the left common carotid artery; 43. the brachiocephalic trunk 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.

Referring to fig. 1-2, fig. 1 shows a schematic structural view of an anti-embolic protection device 10 in an embodiment of the invention, the anti-embolic protection device 10 is adapted to be placed at the aortic arch 40 during a cardiac or aortic procedure to filter blood flowing to the brain to prevent emboli from entering the brain. Fig. 2 illustrates a schematic view of the anti-embolic protection device 10 in the aortic arch 40. The convex side of the aortic arch 40 is communicated with 3 larger arteries, namely a brachiocephalic trunk 43, a left common carotid artery 42 and a left subclavian artery 41 from right to left. The anti-embolism protection device 10 provided by the embodiment can be delivered to the aortic arch 40, covers the communication ports of the brachiocephalic trunk 43, the left common carotid artery 42 and the left subclavian artery 41 with the aorta, and plays a role in filtering the ascending blood flow of the brachiocephalic trunk 43, the left common carotid artery 42 and the left subclavian artery 41, so as to prevent emboli generated in the operation process from entering the brain through the brachiocephalic trunk 43, the left common carotid artery 42 and the left subclavian artery 41.

In particular, referring to fig. 1, the anti-embolic protection device 10 comprises a support frame 11, a first filter 12, a second filter 14, and a support member. Wherein the first filter member 12 is covered on the support frame 11. The second filter element 14 is located below the first filter element 12 and is connected to the first filter element 12 or the support frame 11. The second filter member 14 and the first filter member 12 enclose a passage 141 having both ends open. The channel 141 may be used for blood flow and/or passage of subsequent surgical instruments such as pigtail catheters, visualization catheters, and the like. The support member includes a first support member 13, and the first support member 13 is connected to the distal end of the second filter member 14 or the support frame 11 for defining the shape of the distal opening of the passage 141.

Further, in order to describe the structural features of the present application more clearly, the terms "proximal end 111" and "distal end 112" are used as the directional terms, wherein "proximal end 111" represents the end close to the operator during the operation; "distal end 112" means the end that is distal to the operator. Specifically, the proximal end 111 of the support frame 11 is used to connect to a delivery mechanism 20, and the delivery mechanism 20 is used to deliver the anti-embolic protection device 10 to a target location within the aortic arch 40. Further, the supporting frame 11 is attached to the inner wall of the aortic arch 40 for supporting the first filtering member 12, so that the first filtering member 12 is closely attached to the inner wall of the aortic arch 40, and the first filtering member 12 can cover the communication ports of the brachiocephalic artery 43, the left common carotid artery 42 and the left subclavian artery 41 with the aorta. Further, the first support member 13 is disposed at the distal end 112 of the second filter member 14 (i.e., the end of the second filter member 14 adjacent the heart). The first support member 13 is used to support the second filter member 14 to maintain the shape of the opening of the passage 141, and prevent the passage 141 formed by the second filter member 14 from being deformed or collapsed by the ascending blood flow. Further, the second filter member 14 is connected to the support frame 11 or the first filter member 12, such that the second filter member 14 and the first filter member 12 together enclose a passage 141 having two open ends 1 for blood flow and/or subsequent surgical instruments such as pigtail catheters, visualization catheters, etc. to pass through the anti-embolic protection device 10 from the passage 141.

Above-mentioned anti embolic protection device 10 is through setting up first filter 12 on braced frame 11, and first filter 12 extends the intercommunication mouth that covers first arm trunk artery 43, left common carotid artery 42 and left subclavian artery 41 and aorta to filter the ascending blood flow that flows into first arm trunk artery 43, left common carotid artery 42 and left subclavian artery 41 from the aorta, prevent that the embolus that produces in the operation process from getting into the brain via first arm trunk artery 43, left common carotid artery 42 and left subclavian artery 41, reduced patient's risk of cerebral apoplexy. Meanwhile, by arranging the second filter element 14 below the support frame 11 and enclosing the second filter element 14 and the first filter element 12 to form the channel 141 with two open ends, when the first filter element 12 is not attached to the inner wall of the aortic arch 40 well or is displaced and cannot completely cover the brachiocephalic trunk artery 43, the left common carotid artery 42 or the left subclavian artery 41, a large amount of blood flow in the aorta still flows into the channel 141 formed by the second filter element 14, and when the blood flows out from the peripheral surface of the channel 141 and enters the brachiocephalic trunk artery 43, the left common carotid artery 42 or the left subclavian artery 41, emboli in the blood are filtered by the first filter element 12 and the second filter element 14, so that the possibility that emboli escape into the brain is reduced, the emboli blocking efficiency is improved, and the risk of a patient suffering from cerebral apoplexy is reduced. And when the first filter member 12 is well attached to the inner wall of the aortic arch 40, the first support member 13 can provide a certain supporting force for the supporting frame 11, so that the first filter member 12 can still be tightly attached to the inner wall under the scouring of ascending blood flow, the adherence of the anti-embolism protection device 10 is improved, the occurrence of embolus escape caused by gaps generated between the first filter member 12 and the inner wall is prevented, the first support member 13 can also anchor the aortic arch 40, the anti-embolism protection device 10 is prevented from displacement, and the stability of the anti-embolism protection device 10 is improved. In addition, the channel 141 formed by the first filter member 12 and the second filter member 14 can be used for subsequent surgical instruments to pass through, so that the second filter member 14 can well protect the inner wall of the aortic arch 40 and prevent the inner wall of the aortic arch 40 from being scratched by the subsequent surgical instruments.

Further, referring to fig. 3, the support member further includes a second support member 15, and the second support member 15 is connected to the proximal end of the second filter member 14 or the support frame 11 for defining the shape of the proximal opening of the channel 141. The proximal end 111 of the second filter member 14 is supported by the second support member 15 to better maintain the shape of the passageway 141 defined by the second filter member 14 and to facilitate passage of a guide wire and subsequent surgical instruments through the passageway 141. Preferably, the channel 141 is of a cylindrical configuration with open ends so that the second filter member 14 can be placed against the inner wall of the aortic arch 40.

Referring to fig. 4, in one embodiment, an end of the first support 13 away from the support frame 11 is in a closed configuration. Likewise, the end of the second support 15 remote from the support frame 11 may also be of a closed configuration. The shape of the channel 141 formed by the first filter element 12 and the second filter element 14 can be better maintained by the closed first support element 13 and the closed second support element 15, and the second filter element 14 can be well attached to the aortic arch 40. It should be noted that, referring to fig. 5-6, in another embodiment, an opening 133 is provided at an end of the first supporting member 13 away from the supporting frame 11, and similarly, an opening 133 may also be provided at an end of the second supporting member 15 away from the supporting frame 11, that is, the first supporting member 13 and/or the second supporting member 15 are in an open-loop structure, and the first supporting member 13 and/or the second supporting member 15 in the open-loop structure make the anti-embolic protection device 10 more easily compressed, so as to facilitate the retraction of the anti-embolic protection device 10 into the sheath 21 after the operation is finished. It should be noted that, in other embodiments, one of the first supporting member 13 and the second supporting member 15 may be a closed structure, and the other one is an open structure, which is not described herein.

Referring to fig. 7, in an embodiment, each of the first support 13 and the second support 15 includes a support section 131 having an arc structure and a connection section 132 having a linear structure, the support section 131 is connected to the second filter member 14, and the support section 131 is bent toward the first filter member 12. The connecting section 132 is bent toward the proximal or distal end of the support frame 11 and connected thereto. Further, the support segment 131 may be a closed arc structure or an arc structure having an opening 133. Preferably, the support segment 131 is formed of one or more, different or the same arcs that conform to the surface of the aortic arch 40. The connecting section 132 is connected with the supporting frame 11 by welding or by a metal pipe socket. Preferably, the connecting section 132 extends in a direction proximal to the proximal end 111 of the support frame 11 to further facilitate retraction of the anti-embolic protection device 10 within the outer sheath 21. It should be noted that in some embodiments, the connecting section 132 may be omitted from the first supporting member 13 and/or the second supporting member 15, and the supporting section 131 is directly connected to the supporting frame 11 or the supporting section 131 is directly connected to the supporting frame 11 through an additional member.

Further, when the anti-embolic protection device 10 is in the deployed state, the included angle between the first support member 13 and the distal end 112 side of the support frame 11 is greater than 0 ° and less than or equal to 90 °, and preferably, the included angle is in the range of 70 ° to 90 °. The angle between the second support member 15 and the distal end 112 side of the support frame 11 ranges from greater than 0 ° to less than or equal to 90 °, preferably from 45 ° to 75 °. Further, the first supporting member 13 and the second supporting member 15 are both closed arc structures, and when the anti-embolism protection device 10 is in the deployed state, the diameter of the arc structures ranges from 10mm to 50mm, and the length of the arc ranges from 30mm to 120mm, which may specifically vary according to the difference in inner diameters of the aortic arch 40 at the positions where the first supporting member 13 and the second supporting member 15 are located. Further, when the anti-embolic protection device 10 is in the deployed state, the distance between the connection points of the first support 13 and the second support 15 on the support frame 11 ranges from 40mm to 100mm, and the distance between the connection points of the first support 13 and the second support 15 on the support frame 11 is smaller than the distance between the distal end point and the proximal end point of the support frame 11. Specifically, when the anti-embolic protection device 10 is in the deployed state, the distance from the connection point of the first support member 13 and the support frame 11 to the distal end point of the support frame 11 ranges from 10mm to 50mm, and the distance from the connection point of the second support member 15 and the support frame 11 to the proximal end point of the support frame 11 ranges from 10mm to 50 mm.

Further, the first supporting member 13 and the second supporting member 15 may be made of one or more of a composite wire material or a tube material wound by a single wire or multiple wires, or a sheet material cut by laser. The first supporting member 13 and the second supporting member 15 can be made of biocompatible materials such as metal, polymer, or inorganic nonmetal. The connection mode of the first support 13 and the second support 15 with the support frame 11 may be metal pipe sleeving, laser welding, ultrasonic welding, and the like. It should be noted that the first supporting member 13, the second supporting member 15 and the supporting frame 11 may also be integrally cut from a tube or a sheet by laser cutting or the like.

Further, referring to fig. 8, the support frame 11 includes a frame in a closed loop configuration, and the outer circumference of the first filter member 12 is connected to the frame. Preferably, the support frame 11 is a closed loop structure formed by one or more arcs of different or the same shape, so that the support frame 11 can adapt to different aortic arch shapes and diameters, and can better fit the aortic arch 40 upper wall and support the first filter member 12. The supporting frame 11 is a longitudinally symmetrical or asymmetrical structure, and the length between the distal end point and the proximal end point of the supporting frame 11 is 40mm-120mm when the anti-embolism protection device 10 is in the unfolding state. The transverse width is 40-120 mm. The supporting frame 11 may be made of one or more of a monofilament, a composite wire wound with a plurality of strands, a pipe, or a sheet cut by laser. Preferably, the material for making the supporting frame 11 may be metal or high molecular or inorganic non-metal biocompatible material.

Further, the first filter member 12 and/or the second filter member 14 are woven or laser-perforated films, such as PET (Polyethylene terephthalate), PEEK (polyether ether ketone), PA (Polyamide, nylon) and other high molecular materials. Preferably, the first filter member 12 and/or the second filter member 14 are elastic membranes, for example, the material of the first filter member 12 and/or the second filter member 14 is a woven PET membrane, so that when the anti-embolic protection device 10 is contracted inside the outer sheath 21, the elastic membranes can be stretched, and when the anti-embolic protection device 10 is released out of the outer sheath 21, the elastic membranes can be restored to their original shape. Compared with the first filter element 12 and the second filter element 14 which use non-elastic membrane materials, the first filter element 12 and the second filter element 14 which use elastic membrane materials can reduce the usage amount of the membrane materials, thereby reducing the whole volume of the anti-embolism protection device 10, enabling the anti-embolism protection device 10 to enter the outer sheath tube 21 more easily, and when the anti-embolism protection device 10 is released, the folded membrane materials inside the channel 141 formed by the second filter element 14 are less, and the channel 141 is more convenient for the subsequent surgical instruments to pass through. Further, the mesh size of the first filter element 12 and/or the second filter element 14 may be between 50um and 250um, preferably between 60um and 150um, and more preferably between 100um and 150um, when the anti-embolic protection device 10 is in the deployed state.

Further, the surface of the first filter element 12 and/or the second filter element 14 is provided with an anticoagulant coating. Preferably, the anticoagulant coating comprises an anticoagulant drug such as heparin, an anticoagulant drug, or the like, to prevent emboli from accumulating and clogging the first filter element 12 and/or the second filter element 14 during surgery. The anticoagulant coating may be formed on the surface of the first filter element 12 and/or the second filter element 14 by dip coating or spray coating. In other embodiments, the first filter member 12 and/or the second filter member 14 may be constructed of a material having an anti-clotting agent.

Further, referring to fig. 9, an embodiment of the present application also provides a medical device. Specifically, the medical device of an embodiment includes the anti-embolic protection device 10 of any of the embodiments described above, and a delivery mechanism 20 for delivering the anti-embolic protection device 10 from the femoral vessel lumen into the aortic arch 40. The delivery mechanism 20 includes a pusher member 22, and the pusher member 22 is attached to the proximal end of the support frame 11 or the first filter element 12. Further, the delivery mechanism 20 further comprises an outer sheath 21, a pushing member 22 is movably disposed in the outer sheath 21, the anti-embolic protection device 10 has a contracted state where it is contracted in the outer sheath 21 and a released state where it is located outside the outer sheath 21, the pushing member 22 is connected with the anti-embolic protection device 10, and the pushing member 22 is used for driving the anti-embolic protection device 10 to switch between the contracted state and the released state.

Specifically, during delivery, the anti-embolic protection device 10 is compressed and placed within the sheath 21, thereby facilitating delivery of the anti-embolic protection device 10 to the aortic arch 40. After the anti-embolic protection device 10 is delivered to the target location in the aortic arch 40, the anti-embolic protection device 10 is released to the aortic arch 40 to cover the brachiocephalic trunk 43, left common carotid artery 42, and the communication port of the left subclavian artery 41 with the aorta by relatively moving the sheath 21 and the pusher 22. When it is desired to withdraw the anti-embolic protection device 10, the anti-embolic protection device 10 is again retracted within the outer sheath 21 by moving the outer sheath 21 relative to the pusher 22, and during entry of the anti-embolic protection device 10 into the outer sheath 21, the first and second supports 13, 15 are retracted towards the distal end 112 of the support frame 11, thereby reducing the resistance of the anti-embolic protection device 10 to enter the outer sheath 21.

Further, the pushing member 22 is provided with a guide wire hole penetrating through the axial direction thereof, and the guide wire hole is used for penetrating a guide wire, so that the anti-embolism protection device 10 can enter the aortic arch 40 along the guide wire pre-embedded in the aorta. In another embodiment, the pusher 22 may also be a solid rod with some rigidity. Preferably, the pusher 22 may be a stainless steel or nickel titanium or polymeric tube or rod. Further, referring to FIG. 10, the pusher member 22 is pre-shaped to have a curvature that allows the device to be more adherent during delivery by shaping to different angles of curvature to conform to the shape of the aortic arch 40. The distal end 112 of the pusher member 22 may be attached to the distal end 112 or the proximal end 111 of the support frame 11, or the pusher member 22 may be attached to both the distal end 112 and the proximal end 111 of the support frame 11.

Further, the pushing member 22 penetrates through the anti-embolism protection device 10, and when the anti-embolism protection device 10 is in a release state, the pushing member 22 abuts against the first filtering member 12, so that the first filtering member 12 forms an arc-shaped structure protruding towards a direction away from the second filtering member 14, and the pushing member 22 supports the first filtering member 12 to form the arc-shaped structure, so that the first filtering member 12 can be better attached to the inner wall of the aortic arch 40.

Further, referring to fig. 11, the distal end 112 of the pusher member 22 is provided with a flexible section 221, for example, the distal end 112 of the pusher member 22 is formed with a sea wave cutting structure such that the distal end 112 of the pusher member 22 forms the flexible section 221. Further, the distance between the flexible section 221 and the pushing member 2222 may range from 100mm to 400mm, and preferably may range from 140mm to 300 mm. The flexible section 221 of the pushing member 22 allows the pushing member 22 to freely conform to the curvature of the vessel in the aortic arch 40 and to adhere to the upper wall of the aortic arch 40, thereby allowing the pushing member 22 to support the entire first filtering element 12 for subsequent passage of the device through the channel 141.

Referring to the drawings, the delivery mechanism 20 may further comprise a handle 23, wherein the proximal end 111 of the outer sheath 21 is fixedly connected to the distal end 112 of the handle 23, and the proximal end 111 of the pushing member 22 is movably inserted through the handle 23 and connected to the distal end 112 of the handle 23, so that the pushing and pulling of the handle 23 can move the outer sheath 21 and the pushing member 22 relative to each other to release the anti-embolic protection device 10 out of the outer sheath 21 or shrink the anti-embolic protection device into the outer sheath 21.

Further, the delivery mechanism 20 may further comprise a contrast catheter (not shown), and the handle 23 may be further provided with a contrast catheter inlet (not shown) through which the contrast catheter is movably disposed within the outer sheath and is capable of moving synchronously with the pusher member 22. The angiographic catheter can be imaged with medical images to facilitate the physician in confirming the positioning of the anti-embolic protection device 10 and delivery mechanism 20 during the surgical procedure.

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:

a support frame;

a first filter covering the support frame;

the second filter element is positioned below the first filter element and is connected with the first filter element or the support frame, and the second filter element and the first filter element are enclosed to form a channel with two open ends; and the number of the first and second groups,

a support comprising a first support connected to the distal end of the second filter element or the support frame for defining the shape of the distal opening of the channel.

2. An anti-embolic protection device as in claim 1, wherein the support member further comprises a second support member connected to the second filter member or the proximal end of the support frame for defining the shape of the proximal opening of the channel.

3. The anti-embolic protection device of claim 2, wherein the first support piece is at an angle greater than 0 ° and less than or equal to 90 ° to the distal side of the support frame and/or the second support piece is at an angle greater than 0 ° and less than or equal to 90 ° to the distal side of the support frame in the deployed state.

4. An anti-embolic protection device as in claim 2, wherein the distance between the connection point of the first support on the support frame and the connection point of the second support on the support frame is 40-100 mm in the deployed state of the anti-embolic protection device.

5. The anti-embolic protection device of claim 2, wherein the first support member is connected to the support frame at a point that is 10mm to 50mm from the distal end point of the support frame and the second support member is connected to the support frame at a point that is 10mm to 50mm from the proximal end point of the support frame in the deployed state of the anti-embolic protection device.

6. An anti-embolic protection device as in claim 1, wherein the end of the support member distal to the support frame is a closed structure or provided with an opening.

7. An anti-embolic protection device as in claim 1, wherein the support member comprises a support section connected to the second filter member and bent towards the first filter member.

8. The anti-embolic protection device of claim 4, wherein the support further comprises a connecting section bent toward the proximal or distal end of the support frame and connected to the support frame.

9. A medical device comprising an anti-embolic protection device as in any of claims 1-8 above; and the number of the first and second groups,

the conveying mechanism comprises a pushing piece, and the pushing piece is connected with the supporting frame or the near end of the first filtering piece.

10. The medical device of claim 9, wherein a distal end of the pusher member is disposed through the channel and extends beyond a distal end point of the support frame.

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