CN113440216A - Thrombectomy device and medical device - Google Patents
Thrombectomy device and medical device Download PDFInfo
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- CN113440216A CN113440216A CN202110850129.1A CN202110850129A CN113440216A CN 113440216 A CN113440216 A CN 113440216A CN 202110850129 A CN202110850129 A CN 202110850129A CN 113440216 A CN113440216 A CN 113440216A
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- 208000007536 Thrombosis Diseases 0.000 claims abstract description 92
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22031—Gripping instruments, e.g. forceps, for removing or smashing calculi
- A61B17/22032—Gripping instruments, e.g. forceps, for removing or smashing calculi having inflatable gripping elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22081—Treatment of vulnerable plaque
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Abstract
The invention provides a thrombus taking device and a medical device, wherein the medical device comprises the thrombus taking device, and the thrombus taking device comprises a pushing shaft, a thrombus taking bracket and a rotary driving mechanism; wherein the proximal end of the embolectomy support is connected to the distal end of the pushing shaft, and the embolectomy support is configured to rotate around an axis; the far end of the rotary driving mechanism is connected with the bolt taking bracket and is used for driving the bolt taking bracket to rotate. When the thrombus with higher hardness is grabbed by the thrombus grabbing device, shearing force can be generated by the rotation of the thrombus grabbing support, the embedding effect of the thrombus grabbing support and the thrombus is improved under the action of the shearing force, and the thrombus grabbing effect is improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a thrombus removal device and a medical device.
Background
Acute stroke is a common cerebrovascular disease, has acute onset, rapid development, severe symptoms, high disability rate and high fatality rate, and belongs to a critical condition in cerebrovascular diseases. Generally, cerebral apoplexy can be divided into hemorrhagic type and ischemic type, wherein the proportion of ischemic cerebral apoplexy can reach 70-80%. The pathogenesis of acute ischemic stroke is that thrombus or arteriosclerosis plaque dropped from the wall of a diseased blood vessel causes acute occlusion of cerebral arteries, and further causes a series of physiological and pathological reactions such as inflammatory reaction, apoptosis and the like of ischemic brain tissues. If the blood perfusion of the occluded cerebral artery is recovered in a short time, the cell metabolism of the brain tissue can be recovered to be normal, and the development of an infarct area is avoided.
In the prior art, the main treatment methods of acute ischemic stroke include intravenous thrombolysis and interventional thrombus extraction. The intravenous thrombolysis is intravenous injection thrombolysis medicine, the treatment time window is within three hours after the disease occurs, however, most patients miss the treatment time window when arriving at a hospital after the disease occurs, the thrombolysis effect is seriously reduced, and the blocked blood vessel can not be effectively opened. The interventional thrombus removal is to introduce a thrombus removal device through the femoral artery and remove the thrombus by using the thrombus removal device. The time window for interventional embolectomy is within eight hours after onset of disease. In recent years, the interventional therapy of acute ischemic stroke is rapidly developed, and based on a series of clinical random control tests, the related international organization recommends that a treatment method for interventional embolectomy can be preferentially considered for patients with large vessel occlusion within six hours.
Interventional embolectomy can be broadly divided into two categories: mechanical embolectomy and aspiration embolectomy. Among them, mechanical embolectomy has been developed to date through iteration of first generation embolectomy devices MERCI, second generation embolectomy devices Penumbra (consisting of a reperfusion catheter and a separator), and Solitaire FR (closed loop stent sculpted by laser), third generation embolectomy devices Treo (fully visualized), and Revive (closed distal basket). The mainstream mechanical thrombus extraction method at present is to deliver a microcatheter embedded with a thrombus extraction stent into the body with the aid of a microcatheter, pass through the thrombus or pass through the gap between the thrombus and the blood vessel wall to reach the distal side of the thrombus, and then withdraw the microcatheter and release the thrombus extraction stent. Therefore, the thrombus can be sunk into the thrombus taking support, then the thrombus taking support is withdrawn into the micro catheter, the thrombus is carried into the micro catheter, and finally the thrombus can be moved out of the body by withdrawing the thrombus taking support and the micro catheter. The thrombus taking method mainly utilizes the radial extrusion and embedding effects of the thrombus taking support on thrombus to capture the thrombus, and when the radial force of the thrombus taking support is insufficient, the thrombus capturing effect is poor, so that the method has limitations on hard massive thrombus, large-size cardiogenic white thrombus or plaque thrombus exceeding a treatment time window.
Disclosure of Invention
The invention aims to provide a thrombus taking device and a medical device, which have a good catching effect on hard massive thrombus, large-size cardiogenic thrombus or plaque thrombus.
In order to achieve the aim, the invention provides a bolt taking device which comprises a pushing shaft, a bolt taking bracket and a rotary driving mechanism, wherein the pushing shaft is arranged on the pushing shaft; wherein the proximal end of the embolectomy support is connected to the distal end of the pushing shaft, and the embolectomy support is configured to rotate around an axis; the far end of the rotary driving mechanism is connected with the bolt taking bracket and is used for driving the bolt taking bracket to rotate.
Optionally, the pushing shaft comprises a mandrel and a connecting part, a proximal end of the connecting part is connected with a distal end of the mandrel, and a distal end of the connecting part is connected with a proximal end of the embolectomy support;
the pusher shaft is configured such that at least a portion of the coupling is rotatable about an axis of the mandrel to allow the embolectomy stent to spin.
Optionally, the connection portion is any one of a flexible connection rope, a flexible double loop structure, or a hinge.
Optionally, the connecting portion is a ball and socket assembly, and includes a base and a ball, the base is fixedly connected to the distal end of the spindle, and includes a ball socket, and the ball is movably disposed in the ball and socket seat and is also fixedly connected to the proximal end of the embolectomy support.
Optionally, the rotary driving mechanism is sleeved outside the pushing shaft, and a distal end of the rotary driving mechanism is fixedly connected with a proximal end of the embolectomy support;
the bolt taking device is configured to drive the bolt taking bracket to rotate when the rotary driving mechanism rotates around the axis.
Optionally, the rotary drive mechanism is a cylindrical coil spring structure.
Optionally, the rotary drive mechanism is a tube.
Optionally, the rotation driving mechanism is a control rod, the control rod is arranged in parallel with the pushing shaft, and the distal end of the control rod is connected with the proximal end of the embolectomy support;
the bolt taking device is configured to enable the control rod to drive the bolt taking support to rotate when the control rod revolves around the axis of the pushing shaft.
Optionally, the thrombectomy stent is a self-expanding structure.
In order to achieve the above object, the present invention further provides a medical device, comprising a micro-catheter and the thrombectomy device according to any of the above items, wherein the micro-catheter has a second inner cavity which axially penetrates through the micro-catheter; the thrombus removal device is partially arranged in the second inner cavity and is configured to generate axial relative motion with the micro catheter, and the rotary driving mechanism is also configured to generate circumferential relative motion with the micro catheter and drive the thrombus removal support to rotate.
Compared with the prior art, the thrombus taking device and the medical device have the advantages that:
the thrombus removal device comprises a pushing shaft, a thrombus removal support and a rotary driving mechanism, wherein the proximal end of the thrombus removal support is connected to the distal end of the pushing shaft and is configured to rotate around an axis; the far end of the rotary driving mechanism is connected with the bolt taking bracket and is used for driving the bolt taking bracket to rotate. When the thrombus taking device is conveyed to a region where thrombus exists in an action object body, and the thrombus taking support is driven to rotate around the axis of the thrombus taking support through the rotary driving mechanism after the thrombus taking support is expanded, the embedding effect between the thrombus taking support and the thrombus can be improved, the capturing effect of the thrombus taking support on the thrombus can be improved, and the treatment effect can be improved.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
FIG. 1 is a schematic view of an embodiment of the present invention illustrating a thrombus removal device in a compressed state;
FIG. 2 is an exploded view of a thrombectomy device according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an embolectomy device provided in accordance with an embodiment of the present invention, illustrating an embolectomy stent in an expanded state;
FIG. 4 is a schematic structural view of a thrombectomy device provided in accordance with an alternative embodiment of the present invention;
fig. 5a to 5d are schematic views illustrating a method of using a thrombus removal device according to an embodiment of the present invention.
[ reference numerals are described below ]:
100-push shaft, 110-mandrel, 120-connection, 121-base, 122-sphere, 123-ball socket;
200-thrombus taking support;
300-a rotary drive mechanism;
10-micro guide wire;
20-a microcatheter;
1-thrombosis.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Furthermore, each of the embodiments described below has one or more technical features, and thus, the use of the technical features of any one embodiment does not necessarily mean that all of the technical features of any one embodiment are implemented at the same time or that only some or all of the technical features of different embodiments are implemented separately. In other words, those skilled in the art can selectively implement some or all of the features of any embodiment or combinations of some or all of the features of multiple embodiments according to the disclosure of the present invention and according to design specifications or implementation requirements, thereby increasing the flexibility in implementing the invention.
As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to the appended drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.
As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, and orientation of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, the term "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and the term "distal" generally refers to the end that is first introduced into a patient.
Fig. 1 and fig. 3 are schematic structural views illustrating a thrombus removal device according to an embodiment of the present invention, and fig. 2 is an exploded schematic view of the thrombus removal device.
Referring to fig. 1 to 3, a bolt-removing device according to an embodiment of the present invention includes a pushing shaft 100, a bolt-removing bracket 200, and a rotation driving mechanism 300. The proximal end of the embolectomy support 200 is attached to the distal end of the pusher shaft 100, and the embolectomy support 200 is configured to spin about its axis. The distal end of the rotation driving mechanism 300 is connected to the embolectomy support 200 and is used for driving the embolectomy support 200 to rotate. When the thrombus is caught by the thrombus taking device, after the thrombus is sunk into the thrombus taking support 200, a user can control the rotation of the thrombus taking support 200 through the rotary driving mechanism 300 and generate shearing force, so that the support edges of the thrombus taking support 200 are better embedded into the thrombus, the catching capacity of the thrombus taking support 200 on the thrombus is improved, and the thrombus can be effectively caught even if the radial expansion force of the thrombus taking support 200 is insufficient, and the treatment effect is ensured. The maximum rotation angle of the thrombectomy support 200 can be 360 degrees or less than 360 degrees, which is not limited in the embodiment of the invention.
Referring back to fig. 2, the pushing shaft 100 includes a core shaft 110 and a connecting portion 120, a proximal end of the connecting portion 120 is connected to a distal end of the core shaft 110, a distal end of the connecting portion 120 is connected to a proximal end of the embolectomy stent 200, and the pushing shaft 100 is configured such that at least a portion of the connecting portion 120 is rotatable about an axis of the core shaft 110. This is provided to avoid interference of the pushing shaft 100 with the rotation of the plug holder 200.
In one specific implementation, with continued reference to fig. 2, the connecting portion 120 is a ball and socket assembly including a base 121 and a ball 122. The proximal end of the base 121 is fixedly connected to the distal end of the mandrel 110, and the distal end of the base 121 is formed with a ball socket 123. The ball 122 is movably embedded in the socket 123, and the ball 122 is further fixedly connected to the proximal end of the thrombectomy support 200. By using a ball and socket assembly as the connecting portion 120, the phenomena of kinking and winding of the connecting portion 120 caused by the rotation of the bolt-removing bracket 120 can be avoided.
Alternatively, the connection may be a flexible connection cord. Or, connecting portion are flexible dicyclo structure, specifically, flexible dicyclo structure includes first coil and second coil, first coil fixed connection be in the distal end of dabber, second coil fixed connection be in the near-end of thrombectomy support, just the wire rod of first coil passes the hole of second coil, just the wire rod of second coil passes the hole of first coil. Still alternatively, the connection may be a hinge.
In the present invention, the structure of the rotation driving mechanism 300 may be variously selected as long as it can be connected to the thrombectomy holder 200 and can control the thrombectomy holder 200 to rotate under the action of external force.
In an exemplary embodiment, referring to fig. 1 to 3, the rotary driving mechanism 300 has a first inner cavity axially penetrating through the pushing shaft 100. In other words, the rotary driving mechanism 300 is sleeved outside the pushing shaft 100, the distal end of the rotary driving mechanism 300 is fixedly connected with the proximal end of the embolectomy support 200, and preferably, the rotary driving mechanism 300 is arranged coaxially with the embolectomy support 200. The embolectomy device is configured such that when the rotation driving mechanism 300 rotates, the rotation driving mechanism 300 drives the embolectomy holder 200 to rotate (the arrow in fig. 3 shows the rotation direction of the rotation driving mechanism 300 and the embolectomy holder 200).
In a preferred implementation, the rotary drive mechanism 300 is a cylindrical coil spring structure formed by helically winding the wire around an axis. The blood vessel control device has the advantages of good bending performance, capability of penetrating through tortuous blood vessels, good torsion control performance and convenience in control. The wire material may be a metal wire, such as a nitinol wire. In other implementations, the rotational drive mechanism may also be a tube.
In an alternative embodiment, as shown in FIG. 4, the rotational driving mechanism 300 is a control rod, which is disposed in parallel with the core shaft 110 of the pushing shaft 100, and the distal end of the control rod is fixedly connected to the proximal end of the embolectomy stent 200. When the control rod revolves around the axis of the pushing shaft 100, specifically, the mandrel 110, the control rod drives the embolectomy support 200 to rotate.
It is understood that, in the embodiment of the present invention, the embolectomy stent 200 is a tubular mesh structure, and is preferably a self-expandable structural member, where the self-expandable structural member is made of a highly elastic material, and is capable of deforming when subjected to external pressure (or pulling force) and recovering its deformation under the action of its own elasticity after the external pressure (or pulling force) is removed. Self-expanding structural members are typically made from shape memory alloys such as nitinol, or from highly elastic polymeric materials. The embolectomy stent 200 may be a woven stent or a cut stent, and when the cut stent is used, the invention is not limited to the cutting pattern on the stent wall. Further, the proximal end of the embolectomy support 200 is closed so as to facilitate connection to the rotational drive mechanism 200, and the distal end of the embolectomy support 200 can be either open or closed. In addition, a visualization element may be provided on the thrombectomy stent 200 for determining the position of the thrombectomy stent 200 when the thrombectomy stent 200 is delivered into the subject.
The method of using the embolectomy device is described next in conjunction with fig. 5 a-5 d. The connecting portion 120 of the bolt-removing device used herein is a ball-and-socket assembly, and the rotation driving mechanism 300 is a cylindrical coil spring structure.
Preparation work: one experimental rabbit was collected and 5ml of blood was collected in the auricular vein of the rabbit for use. And then opening the middle brain section of the intracranial vascular model, simultaneously mixing the blood of the rabbit with thrombin and injecting the mixture into the middle brain section of the vascular model, waiting for 3-5 min, confirming that the blood is coagulated into blocks (namely forming thrombus), and connecting the blood vessel of the opened middle brain section back to the intracranial vascular model.
The use process comprises the following steps:
first, a micro-guidewire 10 is introduced into the vascular model and its distal end is brought to the location in the artery where the thrombus 1 is present.
Next, a microcatheter 20 is introduced into the vascular model along the microcatheter 10, and the distal end of the microcatheter 20 reaches the distal side of the thrombus 1 (as shown in fig. 5 a). It is understood that the microcatheter 20 has a second lumen extending axially therethrough and is nested over the exterior of the microcatheter 10.
The micro-guidewire 10 is then withdrawn.
Then, the pushing shaft 100 pushes the thrombectomy stent 200 of the thrombectomy device to the distal end of the microcatheter 20 along the second lumen of the microcatheter 20. During this process the thrombectomy stent 200 is in a compressed state (as shown in FIG. 5 b).
The microcatheter 20 is then withdrawn and the thrombectomy stent 200 is released. After the thrombectomy stent 200 is released, the thrombus 1 is at least partially recessed into the interior of the thrombectomy stent 200 (as shown in FIG. 5 c).
Then, the user controls the rotation of the rotation driving mechanism 300 at the proximal end of the thrombectomy device to drive the thrombectomy stent 200 to rotate (as shown in fig. 5 d), and during the rotation of the thrombectomy stent 200, the thrombectomy stent 200 generates a shearing force to enhance the engagement between the thrombectomy stent 200 and the thrombus 1, thereby improving the capturing capability of the thrombectomy stent 200 on the thrombus 1. It should be noted that, in the embodiment of the present invention, there is no limitation on the rotation direction of the embolectomy support 200, and the embolectomy support may rotate clockwise or counterclockwise.
After confirming that the thrombectomy stent 200 has been effective in capturing thrombi, the user can withdraw the pushing shaft 100, withdraw the thrombectomy stent 200 inside the micro-catheter 20, and finally withdraw the micro-catheter 20 and the thrombectomy device as a whole out of the body, with the thrombi 1 removed out of the body.
It should be noted that, when the thrombus is grasped by the thrombectomy device provided by the embodiment of the invention, the step of driving the thrombectomy support 200 to rotate is not necessarily performed, and specifically, when the hardness of the thrombus 1 is small and the radial supporting force of the thrombectomy support 200 is enough to complete the grasping of the thrombus 1, the thrombectomy support 200 may not be rotated. However, when the hardness of the thrombus 1 is high and the radial supporting force of the thrombectomy support 200 is insufficient to effectively capture the thrombus 1, the rotation of the thrombectomy support 200 is required to generate a shearing force to improve the thrombus capture capability.
Further, the embodiment of the present invention further provides a medical device, which includes the embolectomy device and the micro-catheter 20, the micro-catheter 20 has a second inner cavity extending axially therethrough, the embolectomy device is configured to be partially disposed in the second inner cavity and configured to be capable of generating axial relative movement with the micro-catheter 20, and the rotational driving mechanism 300 is further configured to be capable of generating circumferential relative movement with the micro-catheter 20 and driving the embolectomy stent 200 to rotate.
According to the technical scheme provided by the invention, the rotation of the embolectomy support is driven by the rotary driving mechanism, so that the thrombus is caught by using the radial expansion force of the embolectomy support, meanwhile, the embedding effect of the embolectomy support and the thrombus is enhanced by using the shearing force generated by the rotation of the embolectomy support, the catching capacity of the embolectomy support on the thrombus is enhanced, and the embolectomy device is particularly suitable for the situation that the hardness of the thrombus is high and the radial supporting force of the embolectomy support is insufficient. Compared with the prior art, the bolt taking device only adds one step of controlling the bolt taking bracket to rotate, and does not increase the operation difficulty in terms of the using method.
Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The bolt taking device is characterized by comprising a pushing shaft, a bolt taking bracket and a rotary driving mechanism; wherein the proximal end of the embolectomy support is connected to the distal end of the pushing shaft, and the embolectomy support is configured to rotate around an axis; the far end of the rotary driving mechanism is connected with the bolt taking bracket and is used for driving the bolt taking bracket to rotate.
2. The embolectomy device of claim 1, wherein the pusher shaft comprises a mandrel and a connecting portion, a proximal end of the connecting portion is connected with a distal end of the mandrel, and a distal end of the connecting portion is connected with a proximal end of the embolectomy support;
the coupling is configured to be at least partially rotatable about an axis of the mandrel to allow the embolectomy stent to spin.
3. The embolectomy device of claim 2, wherein the connecting portion is any one of a flexible connecting rope, a flexible double loop structure, and a hinge.
4. The embolectomy device of claim 2, wherein the connecting portion is a ball and socket assembly and comprises a base fixedly attached to the distal end of the mandrel and comprising a ball socket, and a ball movably disposed within the ball and socket seat and further fixedly attached to the proximal end of the embolectomy support.
5. The embolectomy device of claim 1 or 2, wherein the rotary drive mechanism is sleeved outside the pushing shaft, and the distal end of the rotary drive mechanism is fixedly connected with the proximal end of the embolectomy support;
the bolt taking device is configured to drive the bolt taking bracket to rotate when the rotary driving mechanism rotates around the axis.
6. The embolectomy device of claim 5, wherein the rotational drive mechanism is a cylindrical coil spring structure.
7. The embolectomy device of claim 5, wherein the rotational drive mechanism is a tube.
8. The embolectomy device of claim 1 or 2, wherein the rotational drive mechanism is a control rod, the control rod is arranged in parallel with the pushing shaft, and the distal end of the control rod is connected with the proximal end of the embolectomy support;
the bolt taking device is configured to enable the control rod to drive the bolt taking support to rotate when the control rod revolves around the axis of the pushing shaft.
9. The embolectomy device of claim 1, wherein the embolectomy stent is a self-expanding structure.
10. A medical device comprising a microcatheter having a second lumen extending axially therethrough and an embolectomy device as defined in any of claims 1-9; the thrombus removal device is partially arranged in the second inner cavity and is configured to generate axial relative motion with the micro catheter, and the rotary driving mechanism is also configured to generate circumferential relative motion with the micro catheter and drive the thrombus removal support to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110850129.1A CN113440216A (en) | 2021-07-27 | 2021-07-27 | Thrombectomy device and medical device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110850129.1A CN113440216A (en) | 2021-07-27 | 2021-07-27 | Thrombectomy device and medical device |
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| CN113440216A true CN113440216A (en) | 2021-09-28 |
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| CN202110850129.1A Pending CN113440216A (en) | 2021-07-27 | 2021-07-27 | Thrombectomy device and medical device |
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| DE3921071A1 (en) * | 1989-06-28 | 1991-02-28 | Rupprecht Hans Juergen | Removing thrombosis from blood vessel - involves semi-rigid rod with attached bristles, given reciprocating and rotating motion |
| US20070093744A1 (en) * | 2004-01-20 | 2007-04-26 | Massachusetts General Hospital | Permanent thrombus filtering stent |
| CN209347154U (en) * | 2018-12-21 | 2019-09-06 | 北京久事神康医疗科技有限公司 | Thrombus withdrawing device |
| CN211749877U (en) * | 2020-02-06 | 2020-10-27 | 江苏暖阳医疗器械有限公司 | Thrombectomy support device with near-end protection and far-end protection functions |
| CN112617966A (en) * | 2020-12-31 | 2021-04-09 | 杭州唯强医疗科技有限公司 | Thrombus taking device |
| CN215349270U (en) * | 2021-07-27 | 2021-12-31 | 苏州铨通医疗科技有限公司 | Thrombectomy device and medical device |
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2021
- 2021-07-27 CN CN202110850129.1A patent/CN113440216A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3921071A1 (en) * | 1989-06-28 | 1991-02-28 | Rupprecht Hans Juergen | Removing thrombosis from blood vessel - involves semi-rigid rod with attached bristles, given reciprocating and rotating motion |
| US20070093744A1 (en) * | 2004-01-20 | 2007-04-26 | Massachusetts General Hospital | Permanent thrombus filtering stent |
| CN209347154U (en) * | 2018-12-21 | 2019-09-06 | 北京久事神康医疗科技有限公司 | Thrombus withdrawing device |
| CN211749877U (en) * | 2020-02-06 | 2020-10-27 | 江苏暖阳医疗器械有限公司 | Thrombectomy support device with near-end protection and far-end protection functions |
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