CN109771090B - Thrombus filter for preventing cerebral embolism - Google Patents

Abstract

The invention relates to a thrombus filter for preventing cerebral embolism, which comprises: the device comprises a collecting part, a collector, a flow guide part and a sealing part, wherein the flow guide part, the sealing part and the collecting part are integrally formed, so that the flow guide part and the sealing part are of an arc surface structure as a whole; the edges of the flow guide part and the collecting part are provided with sealing parts; the collecting part is protruding to one side of artery branch portion with sealing part, water conservancy diversion portion smooth transition, the collection part outer wall suits with the left clavicle in the artery branch portion artery inner wall down, and the one end fixedly connected with hoop that the water conservancy diversion portion was kept away from to the collection part is restrainted, and the connection collector can be dismantled to the hoop bundle other end. The thrombus filter for preventing cerebral embolism, disclosed by the invention, has a reasonable structural design, collects embolic substances by the collector through the embolic substance drainage value collector of the whole filter, and then collects and filters the embolic substances by the collector, so that the collector is replaced by an operation, the service life of the filter is prolonged, and the influence of the filter on the blood pressure balance in a patient body is avoided.

Description

Thrombus filter for preventing cerebral embolism

Technical Field

The invention relates to the technical field of structural design of a thrombus filter arranged in an aortic arch of a blood vessel, in particular to a thrombus filter for preventing cerebral embolism and a collector intervention replacement device of the thrombus filter for preventing cerebral embolism.

Background

Embolic material may form in vivo after surgery or injury to various organs. These embolic materials can flow through the venous system and lodge in the pulmonary or cerebral arteries, causing complications or death. In the prior art, intravenous intervention through the use of a filter is a very safe and effective treatment for preventing pulmonary embolism, as the device is less traumatic by being able to enter the vena cava through a portion of the peripheral venous system.

An ideal filter would have:

can be delivered in the inferior vena cava using a standard vascular catheter; can be conveyed quickly and accurately without the problem of misorientation;

self-locking in the implanted position without migrating towards the heart;

can capture all dangerous embolic materials; no thrombosis, good biocompatibility and the like.

The SN Filter (Simon Nitinol Filter) is a Ni-Ti alloy Filter, which was successfully developed by Simon et al in the mid 70's of the 20 th century. Simon et al originally involved a filter consisting of two parts, a locking system consisting of a sharp head guide wire and a pull wire, and a filter screen. The head guide wire can pierce the endothelium 1 mm-2 mm deep, and the guide wire is limited from further piercing the endothelium by a small inspection nail at the head. The initial filter screen has a clover blade type, a spiral type and an overlapped ring type, and the later filter screen adopts a cross grid type, so that a more uniform opening size is obtained. In vivo experimental results show that the Ni-Ti alloy filter can be biologically fused with vena cava, and new intima tissue grows on the surface of the filter.

The lOF Teflon guide catheter is inserted to the lower end of the inferior vena cava through the skin, the neck or the femoral vein, the filter is guided to the preset position through the guide catheter, and the guide steel wire is pushed to release the filter from the guide catheter and fix the filter in the inferior vena cava. The filter can be retrieved with a four-jaw grasping forceps (Medi-Tech Westwood, Mass.) or a specially made nylon snare, the latter being mounted in a 6.5FTeflon catheter. One group of 59 reports showed a 7% rate of vena cava thrombosis after implantation, 70% caudal migration, and 20% penetration of the vena cava wall.

Simon et al devised a new method for collecting blood coagulation that travels in blood vessels by placing a Ni-Ti alloy wire, which is in a cooled state (martensitic state) and drawn straight, into a great vein (returning blood to the heart) through a probe tube previously inserted into the wrist vein, so that the alloy wire returns to its original complex shape (parent phase state) as the temperature rises to body temperature, thereby forming a filter. In summary, a straight alloy wire, once deployed from the probe into the body, can form a complex cross-section.

However, in the prior art, the filter can only be surgically inserted into the human body by an interventional method, but cannot be recovered and cleaned. However, not only old patients but also many young patients exist among the existing patients, and the young trend of the patients is more and more obvious particularly along with environmental pollution and the harm of garbage food. The filter may be used for a long time for a young patient, and the filter itself and the embolic material filtered by the filter are easy to form thrombus with blood for a long time, thereby further influencing the balance of blood circulation of the human body and endangering the health of the human body.

Therefore, the filter in the prior art cannot realize surgical cleaning of the embolic material, so that the filter has the service life in the body of a patient, and the embolic material is easy to form thrombus in the body, thereby influencing the balance of blood circulation in the body.

Disclosure of Invention

In view of the above, the main object of the present invention is to provide a thrombus filter for preventing cerebral embolism, which has a reasonable structure design, prolongs the service life of the filter, and avoids the influence of the filter on the blood pressure balance in the patient.

Another object of the present invention is to provide a device for inserting and replacing a collector of a filter for preventing cerebral embolism and thrombus, which can replace the collector of the filter in surgery and reduce the harm of the filter to patients.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a thrombus filter for preventing cerebral embolism, comprising: the collecting part, the collector, the flow guide part and the sealing part are integrally formed, so that the flow guide part and the sealing part are of an overall arc-shaped structure, the arc-shaped structure is attached to the inner wall of one side, close to the artery branch part, of the aortic arch, the flow guide part and the collecting part are arranged adjacently, and the sealing parts are arranged at the edges of the flow guide part and the collecting part; the collecting part is protruding to one side of artery branch portion with sealing part, water conservancy diversion portion smooth transition, the collection part outer wall suits with artery inner wall under the left clavicle in the artery branch portion the one end fixedly connected with hoop that the water conservancy diversion portion was kept away from to the collection part is restrainted, the hoop is restrainted the other end and can be dismantled the connection collector, make the cavity of collector with the collection part inner chamber switches on.

In a preferred embodiment, the collector is connected to the collecting part by a connecting piece, one end of which is fixedly connected to the collector and the other end of which is screwed to the hoop. In a preferred embodiment, the cavity wall of the collector is the same material and structure as the collecting part.

In a preferred embodiment, the other end of the collector is fixedly connected with a fixed beam, the fixed beam is in a cylindrical structure, a cavity plug is in threaded connection with the inside of the fixed beam, the outer wall of the fixed beam is in a threaded outer wall, a connecting cavity is formed in one end, away from the collector, of the cavity plug, and the inside of the connecting cavity is in a threaded structure; and respectively connecting the thread outer wall of the fixed bundle and the thread structure of the connecting cavity with the end part of the interventional device in a threaded manner.

In a preferred embodiment the thread formation of the outer wall of the cavity plug cooperates with the thread formation of the inner wall of the cavity of the connector.

In a preferred embodiment, the thread structure of the connection cavity of the cavity plug is the same as the thread structure of the inner wall of the cylindrical structure of the fixed bundle and the thread structure of the outer wall of the connector in the first thread direction.

The thread structure of the outer wall of the fixed beam is a second thread turning direction, and the first thread turning direction is opposite to the second thread turning direction.

In a preferred embodiment, the first thread direction is right-hand and the second thread direction is left-hand.

In a preferred embodiment, the collector is woven by a nickel-titanium alloy memory wire, and two ends of the woven net of the nickel-titanium alloy memory wire are fixedly connected with the fixing bundles through the connecting pieces respectively.

In a preferred embodiment, the collecting part, the flow guiding part and the sealing part are all of a double-layer structure and are woven by nitinol memory wires.

In a preferred embodiment, the hoop is fixed to the nitinol memory wire end.

A collector intervention replacement device for a thromboembolic-preventive thrombus filter, comprising: the sheath pipe and the driving head, the tip of the sheath pipe is fixedly connected with the driving head.

In a preferred embodiment, the method further comprises: the driving mechanism comprises a driving wire, a driving rod and a limiting block; the driving wire is arranged in the outer sheath tube, and the driving wire and the other end of the outer sheath tube extend out of the human body for interventional operation treatment.

In a preferred embodiment, a first cavity and a second cavity are formed in the driving head, the inner wall of the first cavity is of a threaded structure, and the threaded structure of the first cavity is in threaded fit with the outer wall of the fixed beam.

In a preferred embodiment, the second cavity communicates with the first cavity and the inner cavity of the outer sheath, the limiting block is disposed in the first cavity, the inner wall of the first cavity is cylindrical, and the limiting block has a cylindrical structure, so that the limiting block is limited to rotate or slide in the first cavity.

In a preferred embodiment, a driving wire is fixedly connected to the center of one side of the limiting block, which is close to the sheath tube, so that the driving wire drives the limiting block to rotate or slide, and a driving rod is fixedly connected to the other side of the limiting block, so that the driving rod extends into the first cavity or extends out of the driving head along the first cavity; the outer wall of the driving rod is of a threaded structure, and the threaded structure of the outer wall of the driving rod is matched with the threaded structure of the connecting cavity of the cavity plug.

The thrombus filter for preventing cerebral embolism and the collector intervention replacing device thereof have the following beneficial effects:

the invention relates to a thrombus filter for preventing cerebral embolism, wherein sealing parts are arranged at the edges of a flow guide part and a collecting part; the collection portion and sealing portion, water conservancy diversion portion smooth transition, collection portion outer wall and artery branch portion left clavicle in the lower artery inner wall suit the one end fixedly connected with hoop that the water conservancy diversion portion was kept away from to the collection portion is restrainted, and the connection collector can be dismantled to the hoop other end, make the cavity of collector with the collection portion inner chamber switches on. The problem of prior art, the filter can only use once, can't clear up it in long-term use is solved. Especially for the younger patient, the filter needs longer life-span, however the filter can't be cleared up, just leads to easily in the use, at filter surface, especially the first arm artery, left common carotid artery, the left subclavian artery and aortic arch juncture position, because the filtering action is obvious, forms too much embolic material here, and the embolic material accumulates, further forms the thrombus, influences patient's internal blood balance. The thrombus filter for preventing cerebral embolism has reasonable structural design, collects the embolic material by the collector through the embolic material drainage value collector of the whole filter, mainly drains the embolic material to the collector by the flow guide part, the sealing part and the collecting part, collects and filters the embolic material by the collector, and then carries out surgical replacement on the collector according to different physique of a patient, thereby prolonging the service life of the filter and avoiding the influence of the filter on the blood pressure balance in the patient.

The invention also discloses a collector intervention and replacement device of the cerebral embolism prevention thrombus filter, wherein the end part of the outer sheath tube is fixedly connected with the driving head; the driving wire is arranged in the outer sheath tube, and the driving wire and the other end of the outer sheath tube extend out of the human body for interventional operation treatment; a first cavity and a second cavity are formed in the driving head, the inner wall of the first cavity is of a threaded structure, and the threaded structure of the first cavity is matched with the outer wall of the fixed beam in a threaded manner; the second cavity is communicated with the first cavity and the inner cavity of the outer sheath tube, the limiting block is arranged in the first cavity, the inner wall of the first cavity is cylindrical, and the limiting block is of a cylindrical structure; the center of one side of the limiting block, which is close to the outer sheath tube, is fixedly connected with a driving wire, so that the driving wire drives the limiting block to rotate or slide, and the other side of the limiting block is fixedly connected with a driving rod, so that the driving rod extends into the first cavity or extends out of the driving head along the first cavity; the outer wall of the driving rod is of a threaded structure, and the threaded structure of the outer wall of the driving rod is matched with the threaded structure of the connecting cavity of the cavity plug. The filter realizes the separation and disassembly of the collector of the filter and the connection of a new collector and the collecting part of the original filter by the method of interventional operation, thereby further achieving the filtering effect on the embolic materials.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a diagram of a state of use of a thromboembolic filter in the aortic arch for preventing cerebral embolism according to one embodiment of the present disclosure;

FIG. 2 is an enlarged partial view of the thromboembolic filter of FIG. 1 shown at point A according to one embodiment of the present disclosure;

FIG. 3 is a partial enlarged view of the thromboembolic filter of FIG. 1 shown at point B according to one embodiment of the present disclosure;

FIG. 4 is a front view of a use state of a thrombus filter for preventing cerebral embolism according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of the thromboembolic filter of FIG. 4 in accordance with one embodiment of the present disclosure;

fig. 6 is a cross-sectional view of a collector intervention replacement device for a thromboembolic-preventive thrombus filter at a drive head end location according to one embodiment of the present disclosure.

[ description of main reference symbols ]

1. The collecting part 2, the collector 3, the flow guide part 31, the first flow guide bulge 32 and the second flow guide bulge;

4. the sealing part, 5, the hoop bundle, 6, the connecting piece, 7, the fixing bundle, 8, the cavity plug, 81 and the connecting cavity;

01. aortic arch, 02, arterial branch, 021, brachiocephalic artery, 022, left common carotid artery, 023, left subclavian artery;

101. a sheath tube 102, a driving head 1021, a first cavity 1022 and a second cavity;

103. a driving wire 104, a driving rod 105 and a limiting block.

Detailed Description

The brain embolism prevention thrombus filter and the filter collector replacing device thereof according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, 2, 3, 4 and 5, the thrombus filter for preventing cerebral embolism includes: a collection part 1 for mainly filtering embolic materials (especially, for filtering blood entering the left subclavian artery 023 in the aortic arch 01); the collector 2 has the function of collecting the embolic material, and the collector 2 is replaced to ensure that the embolic material in the filter is less, so as to avoid the embolic material forming thrombus in the filter and influencing the blood in the aortic arch 01 to enter the artery branch part 02; the filter has the functions of filtering and guiding the embolic substances in the aortic arch 01, ensures that the embolic substances enter the collector 2, and avoids accumulating at other parts of the filter to cause the embolic substances to block the flow guiding part 3 of the filter filtering hole; and a sealing part 4 for tightly adhering the filter and the inner wall of the aortic arch 01 and avoiding entering the artery branch part at the edge of the filter. In order to facilitate weaving through the memory wire and further ensure that no sharp structure appears at the edge of the filter to cause injury to a human body, the flow guide part 3, the sealing part 4 and the collecting part 1 are integrally formed and manufactured, so that the flow guide part 3 and the sealing part 4 are of an arc-shaped structure as a whole. Further, for with 01 inseparabler laminating of aortic arch inner wall, guarantee the better filtering action of filter, avoid directly getting into artery branch portion 02 to the unable filtration of part blood, influence the filter effect, at the thermoplastic in-process, design cambered surface structure into: the cambered surface structure is attached to the inner wall of the side, close to the artery branch part 02, of the aortic arch 01 (namely, the structural shape of the side, close to the artery branch part 02, of the cambered surface structure is the same as that of the side, close to the artery branch part 02, of the aortic arch 01). Namely: the water conservancy diversion portion 3 is first arm artery 021 and left common carotid 022 and filter juncture in the artery branch portion 02, and water conservancy diversion portion 3 and the adjacent setting of collection portion 1, guarantees that water conservancy diversion portion 3 is after the embolism material water conservancy diversion, and the entering collection portion 1 that can be fast timely reduces to bond between embolism material and the filter, influences filter blood circulation. The edges of the flow guide part 3 and the collecting part 1 are provided with sealing parts 4, namely: the sealing part 4 is arranged around the flow guide part 3 and the collecting part 1 and ensures an inclined transition from the surface of the flow guide part 3 to the inside of the collecting part 1. The collection portion 1 is in smooth transition with the sealing portion 4 and the flow guide portion 3, the collection portion 1 protrudes to one side of the artery branch portion 02, and the outer wall of the collection portion 1 is adapted to the inner wall of the left subclavian artery 023 in the artery branch portion 02. Preferably, a first diversion bulge 31 is arranged on the surface of one side of the diversion part 3, which is far away from the brachiocephalic artery 021, at the position of the end part of the brachiocephalic artery 021; at the end of the left common carotid artery 022 of the flow guiding part 3, a second flow guiding protrusion 31 is formed on the surface of the side far away from the left common carotid artery 022. The contact area of the flow guiding part 3 is ensured to be larger at the end parts of the brachiocephalic artery 021 and the left common carotid artery 022, so that the blood flowing into the brachiocephalic artery 021 and the left common carotid artery 022 is further ensured to be smooth.

One end of the collecting part 1 far away from the flow guide part 3 is fixedly connected with a hoop 5, and the other end of the hoop 5 is detachably connected with the collector 2, so that the cavity of the collector 2 is communicated with the inner cavity of the collecting part 1. During the long-term use of the filter, all the embolic material filtered by the filter is collected inside the collector 2 through the collecting part 1.

In the specific use process, the collectors 2 with different sizes can be selected according to the medical record conditions of patients, the collectors 2 with smaller sizes can be selected for patients with longer service life (such as young patients, infant patients and teenager patients), and the collectors 2 can be replaced in time according to the filtering conditions in the use process of the patients. Because young patient's amount of exercise is great, uses bulky, leads to the collector 2 fish tail patient easily, to the patient injury. The collector 2 with smaller volume can not only meet the use requirement, but also reduce the possibility of secondary injury to patients. Also, younger patients have less embolic material and are slower to collect and accumulate embolic material without the need for a larger collector 2.

For elderly patients, especially elderly patients, it is considered to use a collector 2 with a large volume, and the preferred collector 2 is elongated in the major axis direction of the ellipse, and the minor axis direction is unchanged, so as to avoid the situation that the minor axis direction is too large, and the left subclavian artery is blocked or thrombus is formed on the outer wall of the collector 2, which affects blood circulation. The size is large, the service life of a single collector 2 can be prolonged, and secondary damage to a patient caused by replacement of the collector 2 is avoided.

In order to realize the detachment of the collector 2 at the position of the aortic arch 01 of the human body, the collector 2 is connected through a connecting piece 6, one end of the connecting piece 6 is fixedly connected with the collector 2, and the other end is in threaded connection with the hoop 5. Namely: in a specific use process, the collector 2 can be rotated, separated from the collecting part 1 or assembled, so that the collector 2 can be replaced. The filter is particularly convenient for young patients to use, not only can ensure the filtering effect on embolic substances, but also can avoid the defect that the accumulation of the embolic substances further forms thrombus to influence the smooth blood supply in the long-term use process.

In order to realize the pressure balance of the aortic arch 01 to the brachiocephalic artery 021, the left common carotid artery 022 and the left subclavian artery 023 in the blood circulation process and avoid influencing the balance in the blood supply process of the human body, the design of the cavity wall of the collector 2 is the same as the material and the structure of the collecting part 1. So that, during a particular use, the filter does not affect the balance of blood circulation throughout the patient's body.

In order to facilitate the operational control of the collector 2 by the interventional device, in particular to facilitate the connection of the interventional device to the collector 2, a fixation bundle 7 is fixedly connected to the other end of the collector 2. In order to facilitate the connection of the fixed bundle 7 with the interventional device, the outer wall of the fixed bundle 7 is a threaded outer wall.

In order to further facilitate the intervention equipment to plug the hollow structure of the connecting piece 6 and avoid the embolic material in the collector 2 from flowing out of the collector 2 in the process of detaching the collector 2, the fixed bundle 7 is designed to be in a cylindrical structure, and a cavity plug 8 is connected inside the fixed bundle 7 through threads. Further, in order to facilitate the control connection of the interventional device to the cavity plug 8, a connecting cavity 81 is formed in one end, away from the collector 2, of the cavity plug 8, and the interior of the connecting cavity 81 is of a threaded structure; the threaded outer wall of the fixed bundle 7 and the threaded structure of the connection lumen 81 are threaded with different structures of the interventional device end, respectively.

In order to further conveniently realize the plugging and connection of the cavity plug 8 to the position of the connecting piece 6, the thread structure of the outer wall of the cavity plug 8 and the thread of the cavity of the inner wall of the connecting piece 6 are designed into a matched structure.

In order to facilitate the connection of the interventional device to the fixed bundle 7 and the cavity plug 8 and the plugging of the connecting piece 6, the thread structure of the connecting cavity 81 of the cavity plug 8 is the same as the thread structure of the inner wall of the cylindrical structure of the fixed bundle 7 and the thread structure of the outer wall of the connecting piece 6 in the first thread turning direction; the thread structure of the outer wall of the fixed bundle 7 is a second thread turning direction, and the first thread turning direction and the second thread turning direction are opposite.

For more structure to conform to the existing standard component structure, it is preferable that the first thread direction is right-handed and the second thread direction is left-handed.

In order to make the structure more reasonable and ensure that the alloy wires at the end of the collector 2 can be fixed better. The collector 2 is woven by nickel-titanium alloy memory wires, and two end parts of a net woven by the nickel-titanium alloy memory wires are fixedly connected with a fixing beam 7 through a connecting piece 6 respectively.

In order to facilitate people, a fixed end is arranged at one end of the filter in the aortic arch 01, and because the blood circulation effect at the fixed end is poor, thrombus is easily generated, and the use of the filter is influenced. The collecting part 1, the flow guide part 3 and the sealing part 4 are all of a double-layer structure and are woven by nickel-titanium alloy memory wires. The hoop bundles 5 fix the end parts of the nickel-titanium alloy memory wires, and the end parts of all the nickel-titanium alloy memory wires are fixed by the hoop bundles 5, thereby ensuring the fixing strength, avoiding the need of fixing a plurality of hoop bundles 5,

as shown in fig. 1 to 5 and fig. 6, the present invention also discloses a collector intervention replacement device for a cerebral embolism prevention thrombus filter, comprising: an outer sheath 101 and a driving head 102, wherein the end part of the outer sheath 101 is fixedly connected with the driving head 102.

Further comprising: a driving wire 103, a driving rod 104 and a limiting block 105; the driving wire 103 is arranged inside the outer sheath tube 101, and the other ends of the driving wire 103 and the outer sheath tube 101 extend out of the human body for interventional operation treatment;

a first cavity 1021 and a second cavity 1022 are formed in the driving head 102, the inner wall of the first cavity 1021 is of a threaded structure, and the threaded structure of the first cavity 1021 is matched with the outer wall thread of the fixed beam 7;

the first cavity 1021 communicates the second cavity 1022 with the inner cavity of the outer sheath tube 101, the limiting block 105 is disposed in the first cavity 1021, the inner wall of the first cavity 1021 is cylindrical, and the limiting block 105 is of a cylindrical structure, so that the limiting block 105 is limited to rotate or slide in the first cavity 1021; and the inner cavity of the sheath 101 and the second cavity 1022 are sealed by the limiting block 105, so that blood is prevented from entering the sheath 101 in the intervention process.

In order to drive the limiting block 105 and the driving rod 104, a driving wire 103 is fixedly connected to the center of one side of the limiting block 105 close to the sheath tube 101, so that the driving wire 103 drives the limiting block 105 to rotate or slide, and the driving rod 104 is fixedly connected to the other side of the limiting block 105, so that the driving rod 104 extends into the first cavity 1021 or extends out of the driving head 102 along the first cavity 1021; the outer wall of the driving rod 104 is in a threaded structure, and the threaded structure of the outer wall of the driving rod (104) is matched with the threaded structure of the connecting cavity 81 of the cavity plug 8.

In a specific connection operation process, namely: during the detachment of the collector 2.

First, the drive head 102 and drive wire 103 of the interventional exchange device are delivered with the sheath 101 to the collector operating site through the patient's left subclavian artery 023;

secondly, the driving wire 103 is rotated (preferably rightwards), so that the limiting block 105 and the driving rod 104 are further driven to rotate, and the end part of the driving rod 104 is in threaded pre-fit with the connecting cavity 81;

thirdly, when the driving rod 104 extends into the connecting cavity 81 from 1/3 to 1/2, the sheath 101 is rotated (preferably left-handed), so that the driving head 102 is screwed with the fixed bundle 7 (at this time, the driving head 102 and the outer wall of the fixed bundle 7 do not match all the threads, but only partially connect the threads);

fourthly, the outer sheath 101 is rotated (preferably left-handed rotation) and the driving wire 103 is rotated reversely (preferably right-handed rotation), so that the number of connecting threads between the driving head 102 and the fixed beam 7 is more, and the driving rod 104 is connected with the connecting cavity 81 more deeply; in the secondary process, the collector 2 is prevented from rotating, if the outer sheath 101 drives the collector 2 to rotate, the outer sheath 101 stops rotating, and the driving rod 104 is driven to rotate by independently rotating the driving wire 103;

fifthly, the driving wire 103 drives the driving rod 104 to rotate until the cavity plug 8 is screwed into the collector 2; extending a driving wire 103 into the collector 2 to enable the cavity plug 8 to extend into the cavity of the connecting rod 6;

sixthly, the driving wire 103 is continuously rotated to further drive the driving rod 104 and the cavity plug 8 to rotate (preferably to rotate rightwards); because the screw thread direction of the outer wall of the connecting piece 6 is the same as the screw thread direction of the outer wall of the cavity plug 8, when the driving wire 103 rotates, the driving rod 104 can be driven to be tightly matched with the connecting cavity 81 in a screw thread way, and further the cavity plug 8 is tightly matched with the cavity of the connecting rod 6;

sixthly, continuing to rotate the sheath 101 (preferably left-handed), fixing the drive wire 103 so that the drive wire 103 restricts the rotation of the collector 2, thereby allowing a tight fit between the drive head 102 at the end of the sheath 101 and the fixed bundle 7;

seventhly, the sheath 101 and the driving wire 103 are rotated together (the rotation direction is the initial rotation direction of the sheath), and as the driving head 102 is completely matched with the outer wall thread of the fixed beam 7, the driving head 102 drives the collector to rotate, so that the connecting piece of the collector 2 is separated from the hoop beam 5; in the process, as the cavity plug 8 in the fixed bundle 7 is completely opened, the cavity in the collector 2 is communicated with the outside of the patient through the outer sheath 101, so that the embolic material can be drained according to the condition, and the phenomenon that the embolic material in the collector 2 flows back due to self torsion in the driving process of the driving head 102 of the collector 2 is further avoided;

eighthly, the traction sheath 101 and the driving wire 103 are separated from the collecting part;

ninth, the outer sheath 101 and the driving wire 103 are pulled to pull the collector 2 out of the patient's blood vessel.

The hoop 5 connecting the new collector 2 to the collecting section 1 can be implemented in reverse of the above-described procedure.

Specifically, the method comprises the following steps: first, the driving wire 103 is rotated (preferably, right-handed), the driving wire 103 drives the driving rod 104 to further drive the collector 2 to rotate, and the connecting piece 6 of the collector 2 is driven to be connected with the hoop 5; furthermore, the driving wire 103 and the left-handed outer sheath 101 are fixed, so that the outer sheath and the fixed bundle are in 1/4-1/3 connection structure; secondly, the connection between the driving rod 104 and the connecting cavity 81 is designed to be more compact structurally; the driving wire 103 is rotated reversely (preferably, rotated left), the driving wire 103 drives the driving rod 104, and the driving rod drives the cavity plug 8 to rotate reversely to be separated from the connecting piece 6;

thirdly, fixing the outer sheath 101, and drawing the driving wire 103 to make one end of the connecting cavity 81 of the cavity plug 8 contact with one end of the fixed bundle 7;

fourthly, the driving wire 103 continuously rotates reversely to drive the driving rod 104 to rotate reversely, so as to drive the cavity plug 8 to rotate reversely, so that the cavity plug 8 is in threaded fit with the inner wall of the fixed beam 7 until the cavity plug 8 is completely matched with the fixed beam 7 (the cavity in the middle of the fixed beam 7 limits that the cavity plug 8 cannot extend out of the cavity, namely the cavity plug 8 cannot extend out of the fixed beam 7 in complete fit);

fifth, the fixed bundle 7 restricts the rotation of the cavity plug 8, thereby continuing to rotate the driving wire 103, thereby disengaging the driving rod 104 from the cavity plug 8;

sixth, the sheath 101 is rotated (preferably right-handed) to disengage the driving head 102 from the outer wall of the stationary bundle 7 of collectors 2, thereby enabling the collectors 2 to be connected.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (7)

1. A thromboembolic filter preventing cerebral embolism, comprising: the collecting part (1), the collector (2), the flow guide part (3) and the sealing part (4), wherein the flow guide part (3), the sealing part (4) and the collecting part (1) are integrally formed, so that the flow guide part (3) and the sealing part (4) are in an arc surface structure as a whole, the arc surface structure is attached to the inner wall of one side, close to the artery branch part (02), of an aortic arch (01), the flow guide part (3) and the collecting part (1) are arranged adjacently, and the sealing part (4) is arranged at the edges of the flow guide part (3) and the collecting part (1); the collecting part (1) is in smooth transition with the sealing part (4) and the flow guide part (3), the collecting part (1) protrudes to one side of the artery branch part (02), the outer wall of the collecting part (1) is adapted to the inner wall of a left subclavian artery (023) in the artery branch part (02), one end, far away from the flow guide part (3), of the collecting part (1) is fixedly connected with a hoop bundle (5), and the other end of the hoop bundle (5) is detachably connected with the collector (2), so that a cavity of the collector (2) is communicated with the inner cavity of the collecting part (1); the collector (2) is connected with the collecting part (1) through a connecting piece (6), one end of the connecting piece (6) is fixedly connected with the collector (2), and the other end of the connecting piece is in threaded connection with the hoop (5);

the other end of the collector (2) is fixedly connected with a fixed beam (7), the fixed beam (7) is of a cylindrical structure, a cavity plug (8) is in threaded connection with the inside of the fixed beam (7), the outer wall of the fixed beam (7) is of a threaded outer wall, a connecting cavity (81) is formed in one end, away from the collector (2), of the cavity plug (8), and the inside of the connecting cavity (81) is of a threaded structure; and enabling the threaded outer wall of the fixed bundle (7) and the threaded structure of the connecting cavity (81) to be respectively in threaded connection with the end part of the interventional device.

2. The cerebral embolism prevention thrombus filter according to claim 1, wherein the cavity wall of the collector (2) is the same material and structure as the collection part (1).

3. The thromboembolism prevention filter as set forth in claim 1, characterized in that the thread structure of the outer wall of the cavity plug (8) is matched with the thread of the inner wall of the cavity of the connecting piece (6);

the thread structure of the connecting cavity (81) of the cavity plug (8) is the same as the thread structure of the inner wall of the cylindrical structure of the fixed bundle (7) and the thread structure of the outer wall of the connecting piece (6), and the thread turning directions are first thread turning directions;

the thread structure of the outer wall of the fixed beam (7) is a second thread turning direction, and the first thread turning direction is opposite to the second thread turning direction.

4. The thromboembolic prevention filter of claim 3, wherein the first thread orientation is right-handed and the second thread orientation is left-handed.

5. The cerebral embolism prevention thrombus filter according to claim 3, wherein the collector (2) is woven by a nickel-titanium alloy memory wire, and two ends of the woven net of the nickel-titanium alloy memory wire are fixedly connected with the fixing bundle (7) through the connecting piece (6).

6. The thromboembolism prevention filter according to claim 1, characterized in that the collection part (1), the flow guide part (3) and the sealing part (4) are all of double-layer structure and are all woven from nitinol memory wire.

7. The cerebral embolism prevention thrombus filter according to claim 6, wherein the hoop bundle (5) is fixed to the nitinol memory wire end.

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