CN212307969U

CN212307969U - Integrated embolectomy support

Info

Publication number: CN212307969U
Application number: CN202022020040.6U
Authority: CN
Inventors: 胡天宙; 张捷捷; 吴重草; 刘振全; 贾晶; 孙冰
Original assignee: Jiangsu Nuanyang Medical Instruments Co ltd
Current assignee: Jiangsu Nuanyang Medical Instruments Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-01-08
Anticipated expiration: 2030-09-16

Abstract

The invention discloses an integrated thrombus removal support which comprises a filter screen, a thrombus removal support, a screen end binding point and a push rod. The thrombus capture device is provided with the thrombus capture device which specially protects the far-end and near-end blood vessels, and the dense net structures with closed two ends can not only sleeve a larger main body thrombus, but also capture stripped small thrombus and other foreign matters which possibly cause embolism, so that small thrombus blocks are prevented from flowing into other near-end or far-end blood vessels; the thrombus filter screen at the near end of the integrated thrombus taking device is fixed with the push rod, and the thrombus filter screen at the far end can move along the axial direction, so that the expansion and contraction of the bracket can be flexibly regulated and controlled; the integrated structure of the thrombus filter screen and the mesh thrombus taking support is used, so that the risk of separation of the thrombus taking support and the thrombus filter screen due to insufficient closure force of the thrombus filter screen in a split structure is effectively avoided while the wrapping property of the thrombus taking device on thrombus is improved.

Description

Integrated embolectomy support

Technical Field

The invention relates to the technical field of medical instruments, in particular to an integrated thrombus removal support.

Background

The stroke is the first cause of death and disability of adults in China, and has the characteristics of high morbidity, high disability rate, high mortality rate and high recurrence rate. Statistical data of a Chinese stroke prevention and treatment report 2018 show that the incidence and the prevalence of stroke in China are continuously increased, and the incidence and the prevalence of ischemic stroke in 2016 in China are 276.75/10 ten thousand and 1762.77/10 ten thousand.

Currently, the clinical treatment for ischemic stroke mainly adopts drug thrombolysis and mechanical thrombus removal. The disadvantages of drug thrombolysis are that the time window is only 3-4.5 hours, and the drug thrombolysis is only suitable for small-size thrombi, which cannot achieve ideal treatment effect for large thrombi, and only about 3% -5% of patients are suitable for drug thrombolysis treatment.

Compared with the drug thrombus extraction, the mechanical thrombus extraction method is short in time consumption, low in risk, high in opening rate and capable of prolonging the time window to 6-24 hours, can strive for more time for reversible ischemic brain tissue, and obviously improves the prognosis of a patient. The mechanical thrombus extraction is to convey the thrombus extractor to a lesion part through a sheath tube, and use the thrombus extractor to extract thrombus out of the body along the sheath tube. During this process, the partially calcified plaque is removed during the recovery process, and may enter cerebral vessels along with the blood flow, again causing vascular embolism, and ultimately leading to death or paralysis of the patient. In the prior art, a far-end protector is generally adopted to filter and collect plaque, thrombus and the like falling off in the operation process. However, such distal protection schemes only protect the distal downstream blood vessels, but cannot protect the aorta and the branch blood vessels upstream thereof.

Disclosure of Invention

1. Technical problem to be solved

The invention solves the technical problem of providing an integrated thrombus extraction support, wherein protectors are provided at the near end and the far end of a thrombus extraction device, so that thrombus blocks falling off from the thrombus extraction support are prevented from entering upstream or downstream branch blood vessels to cause thrombus re-embolism in the blood vessels.

2. Technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an integrated thrombus removal support comprises a filter screen, a thrombus removal support, a screen end binding point and a push rod; the filter screen is bound at the end part through the net end binding point to form an open structure at one end; the thrombus taking support is of a net-shaped barrel structure, two ends of the thrombus taking support are respectively fixedly connected with the opening ends of the filter screens, and the axes of the two filter screens and the thrombus taking support are superposed; the two filter screens and the bolt taking bracket are sleeved on the push rod along the axial direction; the filter screen is close to the end part of the push rod and is fixedly installed on the push rod, and the filter screen is installed on the push rod in a sliding mode along the axial direction.

The integrated thrombus removal support is of a net structure formed by connecting the end parts of a plurality of unit grids, and the unit grids are rhomboid.

The integrated thrombus taking support is of a self-expanding net structure.

In the above integrated thrombus removal stent, the filter screen is a mesh structure woven or cut from a memory material or a high-elasticity material.

The above-mentioned integrated embolectomy support, wherein the embolectomy support is connected with the filter screen by means of weaving, laser welding, bonding or mechanical binding.

The integrated embolectomy support is characterized in that the mesh density of the embolectomy support is greater than that of the filter screen.

Foretell integral type thrombectomy support, wherein, after the constraint the filter screen longitudinal section is:

a bell shape, or;

a truncated cone shape.

The integrated embolectomy support is characterized in that the embolectomy support is provided with a developing wire or a developing element.

3. Advantageous effects

In conclusion, the beneficial effects of the invention are as follows:

(1) the thrombus capture device is provided with the thrombus capture device which specially protects the far-end and near-end blood vessels, and the dense net structures with closed two ends can not only sleeve a larger main body thrombus, but also capture stripped small thrombus and other foreign matters which can cause embolism, so that small thrombus blocks are prevented from flowing into other near-end or far-end blood vessels, and the possibility of secondary stroke is greatly reduced;

(2) this thrombus device near-end thrombus filter screen is got to integral type is fixed with the push rod, and the axial activity can be followed to the distal end thrombus filter screen, can regulate and control more in a flexible way and get the flexible performance of embolus support 2, guarantees that the support can release smoothly to the bolt piece department and the thrombus can fully imbed get the inside of embolus support 2. (3) The thrombus filter screen and the integrated structure of the mesh thrombus taking support effectively avoid the risk of separation of the thrombus taking support and the thrombus filter screen due to insufficient closure force of the thrombus filter screen in a split structure when the inclusion property of the thrombus taking device to thrombus is improved.

Drawings

FIG. 1 is a schematic structural view of an integrated embolectomy device;

FIG. 2 is a partial schematic structural view of the integrated embolectomy device A;

FIG. 3 is a partial schematic structural view of the integrated embolectomy device B;

FIG. 4 is a schematic diagram of a bolt removing process of the integrated bolt removing device;

FIG. 5 is one embodiment of an integrated embolectomy device;

FIG. 6 is a schematic diagram illustrating a thrombus recovery process of the integrated thrombus removal device;

FIG. 7 is a schematic diagram of the delivery process of the integrated embolectomy device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: an integrated thrombus removal device comprises a filter screen 1, a thrombus removal support 2, a screen end binding point 3 and a push rod 4. The two filter screens 1 are bound into a structure with one open end by using the screen end binding points 3, the open part and the thrombus taking support 2 are fixed to form an integrated structure, and the two filter screens 1 and the thrombus taking support 2 are axially sleeved on the push rod 4; the filter screen 1 close to the end part of the pushing rod 4 is permanently fixed on the pushing rod 4, and in the pushing process of the bracket, the pushing force of the pushing rod 4 is conducted through the filter screen 1 at the near end and the thrombus removal bracket 2, so that the thrombus removal device can be integrally pushed forwards; the stent is in a certain pressing and holding state in a protective sheath or a blood vessel, has longer length compared with a free state, and the filter screen 1 at the other end of the thrombus removal stent 2 can freely slide on the push rod 5, so that the normal stretching of the stent is ensured.

Furthermore, the thrombus taking support 2 and the filter screen 1 are both of net structures made of shape memory materials or high-elasticity materials through weaving or cutting, and the thrombus taking support 1 and the filter screen 2 can be made of the same or different materials. Further, the two filter screens have the same or different dense mesh woven structures, the embolectomy support 2 has a loose mesh woven structure, and the grid units are rhomboid (as shown in fig. 3). The three parts are connected by weaving, welding, bonding or mechanical fixing to form an integrated structure (as shown in figure 2).

Furthermore, a developing wire is woven into the thrombus taking support 2 to carry out position identification.

Referring to fig. 4, in order to perform interventional therapy of the integrated thrombus removal device, the thrombus removal support 2 is delivered and released at the thrombus, and the thrombus removal support 2 can completely cover the thrombus lesion position; further, when the thrombus taking support 2 moves along the push rod 4, the thrombus taking support 2 is hung on the thrombus on the vessel wall, so that the thrombus is peeled off and falls off and enters a cavity formed by the mesh wires from meshes of the thrombus taking support 2; furthermore, the filter screens 1 on both sides have a dense screen structure with closed ends, so that a large main body thrombus can be sleeved when the device is pushed or withdrawn, and stripped small thrombus and other foreign matters which can cause embolism can be captured, thereby preventing small thrombus blocks from flowing into other blood vessels at the near end or the far end. Furthermore, the risk that the bolt taking support 2 is separated from the filter screen 1 due to insufficient folding force of the filter screen 2 in a split type structure is effectively avoided by the integrated structure.

Further, this integral type thrombectomy device near-end filter screen 2 is fixed with push rod 4, and distal end filter screen 2 can follow axial activity, can regulate and control the flexible performance of thrombectomy support 2 more in a flexible way, guarantees that the support can release smoothly to bolt piece department and thrombus can fully imbed the inside of thrombectomy support 2.

Referring to fig. 5, a possible embodiment of the integrated thrombus removal device is shown, wherein two filter screens 1 are nested in sequence at two ends of a thrombus removal support 2 and are bound by a screen end binding point 3; the filter screen 1 near the end of the pushing rod, the proximal end of the thrombus taking support 2 and the pushing rod 5 are permanently fixed; the far ends of the filter screen 1 and the thrombus taking support 2 at the other end can slide along the axial direction of the push rod 4; the thrombus taking support 2 is composed of a rhomboid structure with a larger aperture; furthermore, the end part of the bolt taking bracket 2 surrounds and wraps the open ends of the two filter screens 1 from the outside to form an integral structure.

Furthermore, the integrated embolectomy device adopts a mode of fixing a plurality of developing elements on the embolectomy bracket 2 in a distributed mode to carry out the position identification of the bracket in operation.

Referring to fig. 6, in the thrombus recovery process during the interventional procedure of the embodiment shown in fig. 5, in the case that the thrombus on the blood vessel wall is collected inside the thrombus removal stent, the distal filter net 1 filters and collects plaque, thrombus and the like falling off during the operation during the process that the device is withdrawn into the microcatheter so as to protect the distal downstream blood vessel; meanwhile, the near-end filter screen 1 is used for constricting the thrombus taking support before the thrombus taking support enters the micro catheter, so that the collected emboli are prevented from falling off, and the aorta and the branch blood vessel at the upstream of the aorta are protected.

Referring to fig. 7, the integrated thrombus removal device uses the micro-catheter for auxiliary delivery, when the integrated thrombus removal device is in a delivery configuration, the thrombus removal support 2 and the filter screen 1 are both in a press-holding state, and the micro-catheter can axially slide along the push rod and completely cover the thrombus removal support and the filter screen.

Furthermore, the integrated thrombus removal device can be operated and used under the existing technical means.

Furthermore, the forming process and the performance of the integrated bolt taking device are easy to control and guarantee.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a support is tied to integral type thrombectomy which characterized in that: comprises a filter screen (1), a thrombus taking support (2), a screen end binding point (3) and a pushing rod (4); the filter screen (1) is bound at the end part through the screen end binding point (3) to form an open structure at one end; the thrombus taking support (2) is of a net-shaped cylinder structure, two ends of the thrombus taking support are respectively fixedly connected with the opening ends of the filter screens (1), and the axes of the two filter screens (1) and the thrombus taking support (2) are superposed; the two filter screens (1) and the bolt taking bracket (2) are sleeved on the push rod (4) along the axial direction; approaching the end part of the push rod (4), the filter screen (1) is fixedly installed on the push rod (4), and the other filter screen (1) is installed on the push rod (4) along the axial direction in a sliding manner.

2. An integral embolectomy support according to claim 1, wherein: the thrombus removal support (2) is of a net structure formed by mutually connecting the end parts of a plurality of unit grids, and the unit grids are rhomboid.

3. An integral embolectomy support according to claim 2, wherein: the thrombus taking support (2) is of a self-expanding net structure.

4. An integral embolectomy support according to claim 1, wherein: the filter screen (1) is a net structure woven or cut by a memory material or a high-elasticity material.

5. An integral embolectomy support according to claim 1, wherein: the thrombus removal support (2) is connected with the filter screen (1) in a weaving, laser welding, bonding or mechanical binding mode.

6. An integral embolectomy support according to claim 2, wherein: the grid density of the thrombus taking support (2) is greater than that of the filter screen (1).

7. An integral embolectomy support according to claim 1, wherein: the longitudinal section of the filter screen (1) after being bound is as follows:

a bell shape, or;

a truncated cone shape.

8. An integral embolectomy support according to claim 1, wherein: and the embolectomy support (2) is woven with developing wires or fixedly provided with a developing element.