CN107126298B - Recoverable aortic temporary embolism protection device - Google Patents
Recoverable aortic temporary embolism protection device Download PDFInfo
- Publication number
- CN107126298B CN107126298B CN201710325260.XA CN201710325260A CN107126298B CN 107126298 B CN107126298 B CN 107126298B CN 201710325260 A CN201710325260 A CN 201710325260A CN 107126298 B CN107126298 B CN 107126298B
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- Prior art keywords
- protector
- main rod
- branch
- distal
- anchoring
- Prior art date
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Links
- 208000005189 Embolism Diseases 0.000 title description 8
- 230000001012 protector Effects 0.000 claims abstract description 72
- 238000011084 recovery Methods 0.000 claims abstract description 36
- 238000004873 anchoring Methods 0.000 claims abstract description 32
- 230000003073 embolic effect Effects 0.000 claims abstract description 25
- 210000002376 aorta thoracic Anatomy 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 10
- 239000012781 shape memory material Substances 0.000 claims abstract description 9
- 210000005259 peripheral blood Anatomy 0.000 claims abstract description 7
- 239000011886 peripheral blood Substances 0.000 claims abstract description 7
- 230000007423 decrease Effects 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 210000003270 subclavian artery Anatomy 0.000 description 5
- 210000000709 aorta Anatomy 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001356 surgical procedure Methods 0.000 description 4
- 210000001367 artery Anatomy 0.000 description 3
- 238000007675 cardiac surgery Methods 0.000 description 3
- 210000002168 brachiocephalic trunk Anatomy 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- 210000001715 carotid artery Anatomy 0.000 description 2
- 210000001168 carotid artery common Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013152 interventional procedure Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 206010003210 Arteriosclerosis Diseases 0.000 description 1
- 208000037260 Atherosclerotic Plaque Diseases 0.000 description 1
- 206010008088 Cerebral artery embolism Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000002612 cardiopulmonary effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 201000010849 intracranial embolism Diseases 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003557 neuropsychological effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/011—Instruments for their placement or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0008—Fixation appliances for connecting prostheses to the body
- A61F2220/0016—Fixation appliances for connecting prostheses to the body with sharp anchoring protrusions, e.g. barbs, pins, spikes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
Abstract
The invention provides a recyclable aortic temporary embolic protection device, comprising: a protector having a skeleton body and a filter screen covered on the skeleton body for being disposed in the aortic arch to prevent embolic particles from entering the peripheral blood vessel from the aortic arch; a sheath for accommodating the protector when deployed or retrieved; and the recoverer is provided with a recovery ring and a guide wire and is used for recovering the protector, wherein the framework body is made of a shape memory material and is provided with a main rod extending along the axial direction and a plurality of arc-shaped supporting rods which are fixed on two sides of the main rod in a crossed manner, the protector is in a tubular shape with the non-closed side wall, the curvature radius of the protector is gradually reduced from a near-center end to a far-center end, two far-end anchoring branches which are semicircular and are positioned on different circumferences are arranged at the far-center end of the main rod, two near-end anchoring branches which are semicircular and are positioned on different circumferences are arranged at the near-center end of the main rod, and a recovery hook matched with the recovery ring is also arranged at the near-center end of the main rod.
Description
Technical Field
The invention belongs to the field of medical instruments, relates to an aortic temporary embolism protection device, and in particular relates to a recyclable aortic temporary embolism protection device.
Background
Some procedures involving the heart and aorta, such as cardiac surgery, cardiopulmonary bypass, catheter-based interventional heart disease surgery, and interventional ascending aorta surgery, instrument manipulation can easily cause atheroma, lipid cake, thrombus, etc. on the blood vessel to fall off or flake off, forming embolic particles. These embolic particles, upon entering the blood stream, tend to form embolisms in the brain or other downstream vital organs, causing complications. Among them, the embolism can cause cerebral embolism if entering the brain from the left common carotid artery, further possibly leading to neuropsychological defect, stroke and even death, with serious consequences.
To prevent complications caused by embolic particles, embolic protection is often employed during such procedures to prevent embolic particles from entering the peripheral blood vessel.
The embolic protector in the prior art generally has various structures such as a filter screen, an expander, a catheter and the like, and is inconvenient to use clinically due to a plurality of components and complex operation steps.
In addition, the embolic protector is required to be placed in the aortic arch position through the catheter when in use, and in order to prevent the filter screen from being displaced due to blood flow impact, the catheter is required to be always left in the body to support the filter screen in the operation process, and the catheter is required to be taken out together with the filter screen after the operation is finished. Thus, the catheter will always occupy one interventional path (e.g. descending aorta) such that instruments used in other interventional procedures have to enter the body from other paths (e.g. vena cava, common right carotid artery and common left carotid artery, etc.), not only increasing surgical trauma, but also making the procedure difficult to perform smoothly, increasing surgical risk.
Disclosure of Invention
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a recyclable aortic temporary embolic protection device, which is characterized by comprising: a protector having a skeleton body and a filter screen covered on the skeleton body for being disposed in the aortic arch to prevent embolic particles from entering the peripheral blood vessel from the aortic arch; a sheath tube having a tubular shape for accommodating the protector when the protector is disposed or recovered; and the recoverer is provided with a recovery ring and a guide wire connected to the recovery ring and is used for recovering the protector, wherein the framework body is made of a shape memory material and is provided with a main rod extending along the axial direction and a plurality of arc-shaped supporting rods which are fixed on two sides of the main rod in a crossed manner, the protector is in a tube shape with an unsealed side wall, the curvature radius of the protector is gradually reduced from a near-core end to a far-core end, two far-end anchoring branches which are semicircular and are positioned on different circumferences are arranged on the far-core end of the main rod, two near-end anchoring branches which are semicircular and are positioned on different circumferences are arranged on the near-core end of the main rod, and a recovery hook matched with the recovery ring is also arranged on the near-core end of the main rod.
The apparatus for protecting temporary embolism of the main artery of the present invention may further have a technical feature in that a surface of one end of the distal anchoring branch and the proximal anchoring branch, which is far from the main stem, is in a smooth arc shape.
The apparatus of the present invention may also have a technical feature in that the distal anchor branch and the proximal anchor branch are provided with smooth-surfaced anchor balls at the ends thereof remote from the main shaft.
The recoverable aortic temporary embolic protection device of the invention may also have a technical feature in which the proximal end, distal end, middle top end and middle both sides of the protector are respectively provided with a developing mark.
The apparatus for temporary embolic protection of aorta according to the invention may further have a technical feature in that the length of the distal anchoring branch is longer than the length of the branch near the distal anchoring branch, and the end of the filtering net is further covered on the portion of the distal anchoring branch near the main shaft.
The recoverable aortic temporary embolic protection device of the invention can also have the technical characteristics that the pore diameter of the filter screen is 0.02mm-0.5mm.
The recoverable aortic temporary embolism protection device can also have the technical characteristics that the filter screen is woven by using a mesh wire, and the diameter of the mesh wire is 0.01mm-0.1mm.
The recoverable aortic temporary embolic protection device of the present invention may further have a technical feature in which the material of the mesh is any one of an elastic metal, a polymer material, a ductile material, a plastically deformable material, a shape memory material, or a combination of several of them.
The actions and effects of the invention
According to the recyclable aortic temporary embolic protection device, as the distal end and the proximal end of the main rod of the protector are respectively provided with the distal anchoring branch and the proximal anchoring branch, the protector can be firmly anchored in the aortic arch after being released, other supports are not needed, and the sheath tube can be withdrawn after the protector is released, so that an intervention path is left.
The protector is in a tubular shape with the side wall not closed, so that the protector can be attached to the inner wall of a blood vessel, and the protector can protect the inlet of the peripheral blood vessel and does not prevent other instruments from entering and exiting and operating.
Because the curvature radius of the protector gradually decreases from the proximal end to the distal end, the proximal end of the main rod is further provided with a recovery hook, so that the protector can be pulled into the sheath tube by sleeving the recovery ring on the recovery hook, the protector is recovered, and the recovery operation is easy to complete.
Drawings
FIG. 1 is a schematic side view of a temporary aortic embolic protection device according to an embodiment of the invention;
FIG. 2 is a schematic top view of a protector according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a protector placement process according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a protector in use state according to an embodiment of the present invention.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings and examples.
< example >
Fig. 1 is a schematic structural view of a recoverable aortic temporary embolic protection device according to an embodiment of the present invention, and fig. 2 is a schematic structural view of a protector according to an embodiment of the present invention from a top view.
As shown in fig. 1, the recoverable aortic temporary embolic protection device 100 includes a protector 1, a sheath 2, and a recoverer 3.
As shown in fig. 1 and 2, the protector 1 is for placement in the aortic arch during cardiac surgery (including cardiac surgery and cardiac interventional surgery) to prevent embolic particles from entering the peripheral blood vessel at the aortic arch. The protector 1 comprises a carcass 11, two proximal anchoring branches 12, two distal anchoring branches 13, a filter mesh 14 and a recovery hook 15.
The skeleton 11 is made of shape memory material and comprises a main rod 111 and a plurality of support rods 112.
The main rod 111 extends in an axial direction (axial direction of the aorta) with an arc corresponding to the aortic arch.
The supporting bars 112 are arc-shaped and are sequentially fixed at both sides of the main bar 111 in a crossing manner.
In fig. 1, the left side is the proximal end and the right side is the distal end; in fig. 2, the upper side is the proximal end and the lower side is the distal end.
As shown in fig. 1 and 2, the length of the strut 112 decreases from proximal to distal. Accordingly, the radius of curvature of each strut 112 also decreases gradually from the proximal end to the distal end.
Both proximal anchor branches 12 are semi-circular in shape. The two proximal anchoring branches 12 are located on different circumferences, and one ends thereof are connected at the point a of the main rod 111, so that the two proximal anchoring branches 12 are disposed in a front-back crossing manner, forming a triangle-like structure, which is advantageous for stabilization.
Similar to the proximal anchoring branch 12, the two distal anchoring branches 13 are also semicircular, located on different circumferences, and each of their ends is connected at point B of the main rod 111, so that the two distal anchoring branches 13 also form a stable structure like a triangle.
The radius of the distal anchor branch 13 is smaller than the radius of the proximal anchor branch 12. In addition, the overall length of the proximal anchor 12 is greater than the length of the strut 112 nearest the proximal anchor 12.
In this embodiment, the proximal anchor branch 12 and the distal anchor branch 13 are each provided with an anchor ball 16 on an end thereof remote from the main shaft 111, the anchor ball 16 having a smooth surface. The proximal anchor 12 and the distal anchor 13 are made of shape memory material and are integrally formed with the frame 11.
Filter 14 covers frame 11, i.e., main rod 111 and each of struts 112. The proximal end of filter 14 extends proximally to proximal anchor branch 12 and overlies the portions of the two distal anchor branches 13 near main shaft 111, and the distal end extends distally to distal anchor branch 13 and connects at point B.
Since struts 112 are curved and have a radius of curvature that decreases from the proximal end to the distal end, filter 14, when covered, causes protector 1 to assume a tubular shape with the sidewalls unsealed, and the radius of curvature decreases from the proximal end to the distal end. The filter 14 at the distal end of the protector 1 is folded.
In this embodiment, filter 14 has a pore size of 0.02mm to 0.5mm. The filter screen 14 is woven by using a net wire with the diameter of 0.01mm-0.1mm. In addition, the material of the mesh is any one or a combination of a plurality of elastic metals, polymer materials, ductile materials, plastic deformation materials and shape memory materials.
The recovery hook 15 has a hook portion, and an end remote from the hook portion is connected to the distal end of the main lever 111. In addition, the tip end portion of the hook portion remote from the main lever 111 is provided with a small ball 15A having a smooth surface.
The sheath 2 is tubular for accommodating the protector 1 when the protector 1 is deployed or recovered.
The recoverer 3 has a recovery ring 31 and a guide wire 32.
The recovery ring 31 has a ring shape with a diameter smaller than the inner diameter of the sheath tube 2 for hooking the recovery hook 15 after the operation is completed, so that the recovery operation of the protector 1 can be smoothly performed.
The guide wire 32 is connected to the recovery ring 31, and is accommodated in the sheath tube 2 during the recovery operation, and one end far away from the recovery ring 31 extends out of the body to allow the medical staff to operate.
In this embodiment, five developing marks 4 are further provided on the protector 1 for developing the overall position of the protector 1 during surgery. The setting positions of the five developing marks 4 are respectively a proximal end portion (a point position) of the protector 1, a distal end portion (B point position), a middle top end (middle of the main lever 111), and middle both side positions (outside of the middle of the filter screen 14).
The following describes the use procedure of the device according to the present embodiment.
Before the protector 1 is placed, the protector 1 needs to be contracted and then placed inside the head end of the sheath tube 2. Because the struts 112, proximal anchor 12 and distal anchor 13 are all formed of a shape memory material, they have some flexibility and can be retracted into the sheath 2. In addition, when placed, the proximal anchor 12 is positioned near the end of the sheath 2.
Fig. 3 is a schematic diagram of a protector placement process according to an embodiment of the present invention.
When the protector 1 needs to be placed, the sheath tube 2 with the protector 1 placed is first introduced from the left subclavian artery 201 to the aortic arch 202 by an interventional means, and the inner end of the sheath tube 2 is positioned at the corresponding position of the aortic arch 202 (beyond the connection position of the aortic arch 202 and the innominate artery 203). In addition, care should be taken to place the stem 111 of the protector 1 close to the aortic arch 202 where it is connected to other arteries, and in fig. 2, the stem 111 needs to be located on the upper side.
As shown in fig. 3, after the inner end of the sheath 2 reaches the corresponding position, a guide wire (or a catheter having an outer diameter smaller than the inner diameter of the sheath 2) is then placed from the outer end of the sheath 2, and the protector 1 is pushed to move, so that the proximal anchor branch 12 is exposed out of the sheath 2, and then returns to its original shape and branches into the aortic arch 202.
At this time, the protector 1 is pushed continuously, and the sheath 2 is slowly withdrawn, so that the other part of the protector 1 is exposed out of the sheath 2. Since the bracket 112 is also made of a shape memory material, the other parts of the protector 1 return to the original shape in turn, so that the filter screen 14 is attached to the inner wall of the aortic arch 202.
At the end of placement, the distal anchoring branch 13 is released and branches into the left subclavian artery 201. Thereby, the protector 1 is placed into the aortic arch 202.
Fig. 4 is a schematic diagram of a protector in use state according to an embodiment of the present invention.
After placement, the sheath 2 and guidewire are withdrawn, and the protector 1 is placed in the aortic arch 202 with its proximal end positioned adjacent the heart and its distal end positioned in the left subclavian artery 201, as shown in fig. 4. At this time, the connection ports of the innominate artery 203 and the left common carotid artery 204 and the aortic arch 202 are covered with the screen 14, so that embolic particles are blocked by the screen 14 and cannot enter the two arteries when the medical staff performs the operation.
In addition, at this point, if an interventional procedure is required, medical personnel can place the corresponding instrument from the left subclavian artery 201 without having to open additional interventional pathways.
In the recovery, the sheath 2 is placed in the left subclavian artery 201, and the recovery device 3 is placed in the sheath 2 and advanced along the sheath 2 to the position of the protector 1. The recoverer 3 is moved under the developing operation, the recovery ring 31 hooks the recovery hook 15, and the protector 1 can be contracted into the sheath tube 2 by pulling back the recoverer 3, so that the recovery operation is completed.
Example operation and Effect
According to the recyclable aortic temporary embolic protection device of the embodiment, as the distal end and the proximal end of the main rod of the protector are respectively provided with the distal anchoring branch and the proximal anchoring branch, the protector can be firmly anchored in the aortic arch after being released, other supports are not needed, and the sheath tube can be withdrawn after the protector is released, so that an intervention path is reserved.
The protector is in a tubular shape with the side wall not closed, so that the protector can be attached to the inner wall of a blood vessel, and the protector can protect the inlet of the peripheral blood vessel and does not prevent other instruments from entering and exiting and operating.
Because the curvature radius of the protector gradually decreases from the proximal end to the distal end, the proximal end of the main rod is further provided with a recovery hook, so that the protector can be pulled into the sheath tube by sleeving the recovery ring on the recovery hook, the protector is recovered, and the recovery operation is easy to complete.
The distal anchoring branch and the proximal anchoring branch are provided with the anchoring balls with smooth surfaces, and the tip end part of the recovery hook is also provided with the smooth small balls, so that the end parts of the anchoring branch and the recovery hook can be prevented from scratching the inner wall of a blood vessel; the specific position of the protector is provided with the developing mark, so that the position of the protector can be displayed under the developing operation, the protector can be conveniently placed and recovered, and other interventional instruments can be conveniently placed; the filter screen is woven by using the mesh, and the aperture is 0.02mm-0.5mm, so that embolic particles can be effectively blocked.
The above examples are only for illustrating the specific embodiments of the present invention, and the present invention is not limited to the description scope of the above examples.
For example, in an embodiment, the distal anchor branch and the proximal anchor branch are provided with smooth-surfaced anchor balls, and the tip end of the recovery hook is provided with smooth-surfaced small balls; however, in the present invention, the end or tip of the anchor ball or the small ball may be formed in a smooth arc shape, so that the damage to the vessel wall can be avoided.
Claims (5)
1. A recyclable aortic temporary embolic protection device, comprising:
a protector having a skeleton body and a filter screen covered on the skeleton body for being disposed in the aortic arch to prevent embolic particles from entering the peripheral blood vessel from the aortic arch;
a sheath tube having a tubular shape for accommodating the protector when the protector is disposed or recovered; and
a recoverer having a recovery ring and a guide wire connected to the recovery ring for recovering the protector,
wherein the framework body is made of shape memory material and is provided with a main rod extending along the axial direction and a plurality of arc-shaped support rods which are fixed on two sides of the main rod in a crossing way,
the protector is in a tubular shape with an unsealed side wall, the curvature radius of the protector gradually decreases from the proximal end to the distal end,
the distal end of the main rod is provided with two semicircular distal anchoring branches which are positioned on different circumferences, the proximal end of the main rod is provided with two semicircular proximal anchoring branches which are positioned on different circumferences,
the proximal end of the main rod is also provided with a recovery hook matched with the recovery ring,
developing marks are respectively arranged at the positions of the near-center end part, the far-center end part, the middle top end and the two sides of the middle part of the protector,
the length of the distal anchoring branch is greater than the length of the branch proximal to the distal anchoring branch,
the end of the filter screen also overlies a portion of the distal anchor branch proximate the main stem.
2. The device of claim 1, wherein the device comprises:
wherein, the distal end anchor branch and the proximal end anchor branch are the smooth arc in the one end surface that keeps away from the mobile jib.
3. The device of claim 1, wherein the device comprises:
wherein, the distal end anchoring branch and the proximal end anchoring branch are provided with an anchoring ball with smooth surface on one end far away from the main rod.
4. The device of claim 1, wherein the device comprises:
wherein the pore diameter of the filter screen is 0.02mm-0.5mm.
5. The device of claim 1, wherein the device comprises:
wherein the filter screen is woven by using a net wire, and the diameter of the net wire is 0.01mm-0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325260.XA CN107126298B (en) | 2017-05-10 | 2017-05-10 | Recoverable aortic temporary embolism protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325260.XA CN107126298B (en) | 2017-05-10 | 2017-05-10 | Recoverable aortic temporary embolism protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107126298A CN107126298A (en) | 2017-09-05 |
| CN107126298B true CN107126298B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710325260.XA Active CN107126298B (en) | 2017-05-10 | 2017-05-10 | Recoverable aortic temporary embolism protection device |
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| Country | Link |
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| CN (1) | CN107126298B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4066784A4 (en) * | 2019-11-28 | 2022-12-28 | Shanghai Microport Shield Medtech Co., Ltd. | Embolic protection device |
| CN112022427B (en) * | 2020-11-05 | 2021-03-23 | 上海微创医疗器械（集团）有限公司 | Anti-embolism protection device and medical instrument |
| CN116407318A (en) * | 2021-12-29 | 2023-07-11 | 上海微盾医疗科技有限公司 | Filter and embolism prevention protection device |
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