CN217162371U - Intraoperative brain protection device - Google Patents

Abstract

The utility model discloses an intraoperative brain protection device, which comprises an elastic bracket and a filter screen; the elastic support can be expanded to the inner wall of the blood vessel of the aortic arch automatically and is attached to the inner wall of the blood vessel of the aortic arch, the elastic support is of a similar annular structure surrounded by elastic metal materials, and the far end and the near end of the similar annular structure along the axial direction are tilted upwards so that the intraoperative brain protection device is fixed in the aortic arch; the filter screen is positioned in an area enclosed by the elastic support, and two ends of the filter screen are respectively connected with the far end and the near end of the similar annular structure so as to prevent thrombus generated in the operation from entering the head artery. This protection device adopts artery access under the left clavicle, compares with traditional femoral artery protection device, has reduced other femoral artery ways and has gone into the influence that the apparatus occupies femoral artery jointly, guarantees the operation effect, is favorable to the popularization and the application of above-mentioned brain protection device in the medical instrument technical field in the art.

Description

Intraoperative brain protection device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an intraoperative brain protection device.

Background

With the wide clinical and development of cardiovascular intervention operation worldwide. Such as transcatheter aortic valve replacement, transcatheter mitral valve replacement, and the like. In the operation process, calcified plaque, blood clot and other structures are broken and fall off, and enter a cerebral vessel or other important organs along the blood flow direction, so that severe complications such as cerebral apoplexy and the like are caused.

In the prior art, a thrombus protection device intervened through a femoral artery is available, and when TAVI or mitral valve replacement through the femoral artery and other operations are performed by the instruments, the instruments occupy the space of a part of femoral artery blood vessels, so that other instruments are more easily used to damage the blood vessels. For example, the technical proposal disclosed by the Chinese patent application of the thrombus protection device (publication number: CN108309505A) is as follows: it needs to enter through femoral artery, occupies the limited space of femoral artery blood vessel, restricts the use of other apparatus, is unfavorable to the operation in the art, is difficult to guarantee postoperative effect. Therefore, it is necessary to design it newly to overcome the above-mentioned disadvantages.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect among the above-mentioned prior art, the utility model aims to provide a brain protection device in art, this protection device is gone into the way through left clavicle artery down, compares with traditional femoral artery protection device, has reduced other femoral artery ways and has gone into the influence that the apparatus occupy femoral artery jointly, guarantees the operation effect, is favorable to the popularization and the application of brain protection device in above-mentioned art in medical instrument technical field.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that the intraoperative brain protection device comprises an elastic bracket and a filter screen; the elastic support can be self-expanded on the inner wall of the blood vessel of the aortic arch and is attached to the inner wall of the blood vessel of the aortic arch, the elastic support is of a similar annular structure surrounded by elastic metal materials, and the far end and the near end of the similar annular structure along the axial direction are both upwards tilted so that the intraoperative brain protection device is fixed in the aortic arch; the filter screen is positioned in an area enclosed by the elastic support, and two ends of the filter screen are respectively connected with the far end and the near end of the similar annular structure so as to prevent thrombus generated in the operation from entering the head artery.

As a preferred embodiment of the present invention, the filtering net covers the inner wall of the blood vessel of one third or more than one third of the cross section of the aortic arch.

As an optimized scheme of the utility model, the far end of the elastic support upwards perk angle is 90 ~ 150, the near end of the elastic support upwards perk angle is 20 ~ 90.

As an optimized proposal of the utility model, the far end of the elastic bracket is provided with an external expanding structure which is used for increasing the contact area between the brain protection device and the inner wall of the aortic arch vessel in the operation and is vertical to the axial direction.

As an optimized scheme of the utility model, elastic support still is equipped with a level and smooth transition district, in order to connect elastic support's distal end and near-end, the outside protrusion in transition district is in order to form the support section, the support section is used for supporting the aortic arch blood vessel and deviates from cerebral artery.

As a preferred scheme of the utility model, elastic support's near-end outside still is equipped with the second filter screen, the mesh density of second filter screen is greater than the mesh density of filter screen, the collapsible to laminating near-end of second filter screen elastic support's fold condition, the expandable to laminating of second filter screen the inflation state of aortic arch blood vessel inner wall.

As a preferred scheme of the utility model, the outward flange of filter screen with the part or whole inward flange of elastic support are connected.

As a preferred scheme of the utility model, elastic support has the connecting portion that are threaded rod or screw hole structure be connected with outside conveyer, connecting portion set up in being close to elastic support's end of restrainting, connecting portion are located artery department under the left clavicle or inside.

As an optimized scheme of the utility model, the near-end of elastic support still is equipped with a near-end sealing member, connecting portion are located on the near-end sealing member, artery department or its inner wall under the left clavicle of near-end sealing member laminating.

As a preferred aspect of the present invention, the proximal seal surrounds the left subclavian artery ostium; the intraoperative brain protection device is conveyed to the inner wall of a blood vessel of an aortic arch through a left subclavian artery by the conveyor, the elastic support is fixed on the inner wall of the blood vessel of the aortic arch, the filter screen is expanded in the fixed range of the elastic support, and after the elastic support is expanded, the thrombus or plaque is adsorbed on the filter screen under the action of blood and enters the near-end sealing element by the filter screen.

Compared with the prior art, the utility model provides a beneficial effect is:

the utility model provides an intraoperative brain protection device adopts artery access under the left clavicle, compares with traditional femoral artery protection device, has reduced the influence that other femoral artery access apparatus occupy femoral artery jointly.

Further, the utility model provides an elastic support has adopted double curvature bearing structure, laminating aortic arch blood vessel that can be better provides higher laminating and protective capacities.

Further, the utility model discloses artery opening part is equipped with the string bag structure under the clavicle, can be effectively with filterable thrombus, in collecting the string bag along the blood flow, reduces the volume that flows to femoral artery.

Further, the utility model discloses a setting is the filter screen of pocket form, after the device collects the thrombus, when retrieving, can reduce the thrombus by a wide margin and reveal, reduce the operation risk.

Further, the device is not limited to be used for protecting the aortic arch, and can also be used for protecting blood vessels at other positions.

Drawings

Fig. 1 is a schematic structural diagram of an intraoperative brain protection device according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an intraoperative brain protection device according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of an elastic support in an intraoperative brain protection device according to a first embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

fig. 5 is a schematic structural diagram of an intraoperative brain protection device according to a second embodiment of the present invention;

fig. 6 is a schematic structural diagram of an intraoperative brain protection device according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of an intraoperative brain protection device according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of an intraoperative brain protection device according to a third embodiment of the present invention;

fig. 9 is a schematic view of a state of use of an intraoperative brain protection device according to a third embodiment of the present invention;

fig. 10 is a schematic structural diagram of an intraoperative brain protection device according to a fourth embodiment of the present invention;

fig. 11 is a schematic structural diagram of an intraoperative brain protection device according to a fourth embodiment of the present invention;

fig. 12 is a schematic cross-sectional view of an intraoperative brain protection device according to a fourth embodiment of the present invention;

fig. 13 is a schematic structural view of an intraoperative brain protection device according to a fifth embodiment of the present invention;

fig. 14 is a schematic structural diagram of an intraoperative brain protection device according to a fifth embodiment of the present invention;

fig. 15 is a schematic cross-sectional view of an intraoperative brain protection device according to a fifth embodiment of the present invention;

fig. 16 is a schematic structural diagram of an intraoperative brain protection device according to a fifth embodiment of the present invention;

fig. 17 is a schematic view of a fifth embodiment of the present invention showing a state of use of the brain protection device during an operation;

fig. 18 is a schematic structural view of an intraoperative brain protection device according to a fifth embodiment of the present invention.

Reference numerals: 1. an elastic support; 2. a filter screen; 3. a proximal seal; 4. a connecting portion; 5. the left subclavian artery; 6. The left common carotid artery; 7. a head and arm trunk; 8. a through hole; 9. a guide wire; 10. a conveyor; 11. the aortic arch; 12. a second filter screen; 13. an outward expansion structure; 14. a transition zone.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the field of interventional medical devices, the "distal end" is defined as the end that is distal from the operator during the procedure, and the "proximal end" is defined as the end that is proximal to the operator during the procedure. "axial" refers to a direction parallel to the line joining the centers of the distal and proximal ends of the medical device, and "radial" refers to a direction perpendicular to the axial direction.

The following describes embodiments of the present invention in detail with reference to the accompanying drawings.

The first embodiment is as follows: as shown in fig. 1 to 4, an intraoperative brain protection device comprises an elastic stent 1 and a filter screen 2, wherein the elastic stent 1 is in a contracted state when not entering the inner wall of a blood vessel of an aortic arch 11, and when entering the inner wall of the blood vessel of the aortic arch 11, the elastic stent 1 can automatically expand on the inner wall of the blood vessel of the aortic arch 11 and is attached to the inner wall of the blood vessel of the aortic arch 11. As shown in fig. 3, in order to avoid the injury of the corners of the elastic support 1 to the patient, the elastic support 1 is a similar annular structure surrounded by elastic metal materials, and the similar annular structure is a similar annular structure, so that the generation of the corners can be effectively avoided, and the safety in the operation process is ensured while the supporting function is played. The distal end and the proximal end of the elastic support 1 with the ring-like structure in the axial direction of the elastic support are both tilted upwards so that the intraoperative brain protection device is fixed in the aortic arch 11. The filter screen 2 is positioned in the area enclosed by the elastic bracket 1, and two ends of the filter screen 2 are respectively connected with the far end and the near end of the annular structure so as to prevent thrombus generated in operation from entering into the head artery.

In order to make thrombus or embolus smoothly flow to the filter screen 2 and ensure the stability of the elastic bracket 1 in the using process, the upward tilting angle of the far end of the elastic bracket 1 is 90-150 degrees, preferably 120-140 degrees; the upward tilting angle of the proximal end of the elastic bracket 1 is 20 to 90 degrees, and preferably 30 to 60 degrees.

The far end of the elastic support 1 is provided with an external expansion structure 13 in the direction perpendicular to the axial direction, and the external expansion structure 13 is mainly used for increasing the contact area between the intraoperative brain protection device and the inner wall of the blood vessel of the aortic arch 11, so that the effective protection effect is achieved.

The stent 1 is further provided with a smooth transition region 14 for connecting the distal end and the proximal end of the stent 1, and the transition region 14 is outwardly protruded to form a support section for supporting the aortic arch 11 to be away from the cerebral artery.

The elastic support 1 is provided with a connecting part 4 connected with an external conveyor 10, the connecting part 4 can be set to be a simple thread structure, and can be set to be a screw rod structure or a screw hole structure, so that the elastic support can be assembled and disassembled with the external conveyor 10, and the operation difficulty is reduced. For convenience of operation, the connecting portion 4 is disposed at and near the constrained end of the elastic bracket 1. In order to ensure the using effect of the filter screen 2, the elastic support 1 adopts a double-curvature structure to support one third or more than one third of the position of the blood vessel. The brain protection device during the operation is conveyed to the inner wall of the blood vessel of the aortic arch 11 through the left subclavian artery 5 by the conveyor 10, compared with the traditional way of entering from the aortic arch 11, the brain protection device in the implementation enters the way through the left subclavian artery 5, and mainly aims to prevent substances such as thrombus generated by mitral valve replacement from flowing into the left (right) common carotid artery 6 and the left subclavian artery 5 through the aortic arch 11, and reduce the influence of other femoral artery access instruments on jointly occupying femoral arteries.

The cut-off line of the elastic bracket 1 is consistent with the cut-off line of the filter screen 2 or the cut-off line of the filter screen 2 exceeds the cut-off line of the elastic bracket 1 to support one third or more than one third of the position of the blood vessel so as to ensure the use performance of the device in the use process.

In order to ensure the connection strength and reduce the probability of the filter screen 2 falling off, the outer edge of the filter screen 2 is connected with part or all of the inner edge of the elastic support 1.

In the prior art, the specification and size of the mitral valve replacement implantation catheter and the brain protection device are both 10F, which may cause vessel rupture, in order to solve the technical problems, the brain protection device in the implementation can be put into a 7F sheath, compared with the prior art, the volume is reduced, the probability of vessel rupture can be effectively reduced, and the safety of aortic vessels is protected.

In order to ensure the structural strength of the joint of the elastic support 1 and the filter screen 2 and reduce the probability of the filter screen 2 falling, the filter screen 2 is connected to the elastic support 1 by one or more methods of weaving, wrapping and welding.

In order to facilitate the adsorption of thrombus and the protection of the inner wall of the blood vessel, the surface of the filter screen 2 can be coated with a film.

The elastic support 1 is integrally of a streamline arc structure, can provide a supporting effect for the whole filter screen 2 and a bundling effect when the device is recovered when being fully attached to the inner wall of the blood vessel, and reduces the influence on the inner wall of the blood vessel.

The elastic support 1 is made of any one or a combination of more of nickel-titanium alloy, cobalt-chromium alloy and platinum-iridium alloy.

The elastic support 1 is made by any one or combination of laser cutting and welding processes.

The filter screen 2 is made of any one or more of polymers such as nickel titanium wires, platinum iridium wires and polyurethane.

In order to reduce the probability of the exposure of the plugs or plaques, the filter mesh 2 has an aperture of between 60 and 200 um.

In order to ensure the quality of the filter screen 2, the filter screen 2 is made into a net shape by adopting a weaving or chemical process.

Example two: as shown in fig. 5 to 6, the present embodiment is different from the first embodiment in that: the intraoperative brain protection device in the embodiment comprises an elastic support 1 and a filter screen 2, wherein a second filter screen 12 is further arranged outside the near end of the elastic support 1, and the second filter screen 12 is arranged on the extension line of the filter screen 2, so that even if the filter screen 2 extends towards the left subclavian artery 5 until the second filter screen 12 can completely cover the left subclavian artery 5, a thrombus or plaque is prevented from entering the left subclavian artery 5.

In order to facilitate the storage and the expansion, and to ensure the safety during the use for the safety, the mesh density of the second filter 12 is greater than the mesh density of the filter 2, the second filter 12 can be contracted to a folded state to be attached to the elastic stent 1 at the proximal end, and the second filter 12 can be expanded to an expanded state to be attached to the inner wall of the blood vessel of the aortic arch 11.

Example three: as shown in fig. 7 to 9, the present embodiment is different from the first embodiment in that: the intraoperative brain protection device in the embodiment comprises an elastic support 1 and a filter screen 2, wherein the proximal end of the elastic support 1 is obliquely arranged upwards, a proximal seal 3 for collecting embolus or plaque is formed by the filter screen 2 close to the constricted end of the elastic support 1, the proximal end of the elastic support 1 is further provided with the proximal seal 3, the connecting part 4 is positioned on the proximal seal 3, and the proximal seal 3 is attached to the opening of a left subclavian artery 5 or the inner wall of the left subclavian artery.

The proximal seal 3 encircles the ostium of the left subclavian artery 5; the intraoperative brain protection device is conveyed to the inner wall of a blood vessel of an aortic arch 11 through a left subclavian artery 5 by the conveyor 10, the elastic support 1 is fixed on the inner wall of the blood vessel of the aortic arch 11, the filter screen 2 is unfolded within the fixing range of the elastic support 1, and after the unfolding, the thrombus or plaque is adsorbed to the filter screen 2 under the action of blood and enters the near-end sealing element 3 through the filter screen 2.

The brain protection device is delivered to the inner wall of the blood vessel of the aortic arch 11 through the left subclavian artery 5 by the delivery device 10, the elastic stent 1 is fixed on the inner wall of the blood vessel of the aortic arch 11, the filter screen 2 is expanded in the fixed range of the elastic stent 1, and after the expansion, the thrombus or plaque is absorbed on the filter screen 2 under the action of blood and enters the near-end sealing member 3 through the aortic arch 11.

The two filter screens 2 are arranged in the embodiment, the two filter screens 2 are bound to form a closed type as shown in fig. 8, one side of the closed type just blocks the left common carotid artery 6 and the head and arm trunk 7, and the influence of a thrombus block or a plaque on the two is completely avoided.

Example four: as shown in fig. 10 to 12, the present embodiment is different from the fourth embodiment in that: the intraoperative brain protection device in the embodiment comprises an elastic support 1 and a filter screen 2, wherein the tail end of the filter screen 2, namely a proximal sealing element 3 in the embodiment, is of a closed woven mesh structure, a through hole 8 for a heart valve repair instrument to pass through is formed in the middle of the proximal sealing element 3, and the through hole 8 is a conveying channel of a mitral valve replacement conveyor 10, so that the proximal sealing element 3 is contracted by pulling the conveyor 10, and then a thrombus or plaque is collected.

Example five: as shown in fig. 13 to 18, the present embodiment is different from the fourth embodiment in that: the intraoperative brain protection device in the embodiment comprises an elastic support 1 and a filter screen 2, wherein the middle of the filter screen 2 is of a half-open structure, so that the woven mesh is compressed in the propelling process, and the occupied space of the device in a blood vessel is reduced. Simultaneously, remove the whole focus of elastic support 1 and filter screen 2 to the direction at connecting portion 4 place, form the full parcel string bag to form the full parcel string bag passageway in elastic support 1, above-mentioned device is operated to rethread seal wire 9, with the reduction operation degree of difficulty, the collection and the release of the filter screen 2 of being convenient for.

The net bag of the filter screen 2 can be enlarged and arranged for collecting the embolus or plaque at the femoral artery position.

According to the intraoperative brain protection device in the embodiment, the approach through the left subclavian artery is adopted, and compared with the traditional femoral artery protection device, the influence of other femoral artery access instruments on jointly occupying the femoral artery is reduced; the elastic support 1 adopts a double-curvature supporting structure, so that the aortic arch blood vessel can be better attached, and higher attaching and protecting capabilities are provided; the net bag structure is arranged at the opening of the subclavian artery, so that filtered thrombus can be effectively collected into the net bag along the blood flow, and the amount of the filtered thrombus flowing to the femoral artery is reduced; the utility model discloses a filter screen that the setting is pocket form, after the device collects the thrombus, when retrieving, can reduce the thrombus by a wide margin and reveal, reduce the operation risk.

The device is not only limited to be used for protecting the aortic arch, but also can be used for protecting blood vessels at other positions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more here: 1. an elastic support; 2. a filter screen; 3. a proximal seal; 4. a connecting portion; 5. the left subclavian artery; 6. the left common carotid artery; 7. a head and arm trunk; 8. a through hole; 9. a guide wire; 10. a conveyor; 11. The aortic arch; 12. a second filter screen; 13. an outward expansion structure; 14. transition zone, etc., without excluding the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. An intraoperative brain protection device, characterized by: comprises an elastic bracket (1) and a filter screen (2); the elastic support (1) can be expanded on the inner wall of a blood vessel of the aortic arch (11) and is attached to the inner wall of the blood vessel of the aortic arch (11), the elastic support (1) is of a ring-like structure surrounded by elastic metal materials, and the far end and the near end of the elastic support (1) along the axial direction are both tilted upwards so that the intraoperative brain protection device is fixed in the aortic arch (11); the filter screen (2) is positioned in an area enclosed by the elastic bracket (1), and two ends of the filter screen (2) are respectively connected with the far end and the near end of the annular structure so as to prevent thrombus generated in operation from entering into the head artery; the filter screen (2) covers the inner wall of the blood vessel of one third or more than one third of the cross section of the aortic arch (11).

2. The intraoperative brain protection device of claim 1, wherein: the far end of the elastic support (1) is tilted upwards by an angle of 90-150 degrees, and the near end of the elastic support (1) is tilted upwards by an angle of 20-90 degrees.

3. An intraoperative brain protection device according to claim 2, wherein: the far end of the elastic support (1) is provided with an external expanding structure (13) which is used for increasing the contact area of the brain protection device and the inner wall of the blood vessel of the aortic arch (11) in the operation in the direction vertical to the axial direction.

4. The intraoperative brain protection device of claim 3, wherein: the elastic stent (1) is further provided with a smooth transition area (14) to connect the far end and the near end of the elastic stent, and the transition area (14) protrudes outwards to form a supporting section which is used for supporting the blood vessel of the aortic arch (11) to deviate from the cerebral artery.

5. The intraoperative brain protection device of claim 4, wherein: the near-end outside of elastic support (1) still is equipped with second filter screen (12), the mesh density of second filter screen (12) is greater than the mesh density of filter screen (2), second filter screen (12) collapsible to laminating near-end the fold condition of elastic support (1), second filter screen (12) expandable to laminating the inflation state of aortic arch (11) vascular inner wall.

6. An intraoperative brain protection device according to claim 1 or 5, wherein: the outer edge of the filter screen (2) is connected with part or all of the inner edge of the elastic support (1).

7. The intraoperative brain protection device of claim 1, wherein: the elastic support (1) is provided with a connecting part (4) which is connected with an external conveyor (10) and is of a threaded rod or threaded hole structure, the connecting part (4) is arranged at a converging end close to the elastic support (1), and the connecting part (4) is positioned at the position of a left subclavian artery (5) or inside the left subclavian artery.

8. The intraoperative brain protection device of claim 7, wherein: the near end of elastic support (1) still is equipped with a near-end sealing member (3), connecting portion (4) are located on the near-end sealing member (3), near-end sealing member (3) laminating left subclavian artery (5) mouth of a mouthful department or its inner wall.

9. The intraoperative brain protection device of claim 8, wherein: the proximal seal (3) encircles the ostium of the left subclavian artery (5); intraoperative brain protection device passes through conveyer (10) is carried to the blood vessel inner wall of aortic arch (11) through left subclavian artery (5), elastic support (1) is fixed in the blood vessel inner wall of aortic arch (11), filter screen (2) expand in the fixed range of elastic support (1), and expand the back, embolus or plaque are adsorbed under the effect of blood in filter screen (2), and pass through filter screen (2) get into near-end sealing member (3).

10. The intraoperative brain protection device of claim 9, wherein: the middle part of the near end sealing element (3) is provided with a through hole (8) for the heart valve repair instrument to pass through.

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