CN202875432U - Intracranial vessel thrombus taking device - Google Patents

Abstract

The utility model provides an intracranial vessel thrombus taking device comprising a thrombus taking device body, a guidance guide wire, a pull-push guide wire and an epitheca pipe. The thrombus taking device body is connected with the pull-push guide wire, the installed pull-push guide wire and the thrombus taking device body are pressed and grasped into the epitheca pipe, and the thrombus taking device body is converted between a retrieving position and a spreading position through pushing and pulling of the pull-push guide wire. In the retrieving position, the thrombus taking device body is taken back into the epitheca pipe; and in the spreading position, the thrombus taking device body is pushed outside the epitheca pipe, and is spread under the original radial supporting force of thrombus taking device body materials to form a hollow cavity. The device is characterized in that the thrombus taking device body is composed of at least four rods, one end of each rod at a distant end of the pull-push guide wire is fixed to the pull-push guide wire, in the spreading position, the rods are spread to form a hollow three-dimensional structure, and the rods are inserted into thrombi so as to fix the thrombi. According to the device, the thrombus taking device body has a small outer diameter in the retrieving position, so that the thrombus taking device has a small size and can firmly fix the thrombi.

Description

Intracranial vessel is got pin device

Technical field

This utility model relates to medical apparatus and instruments, is specifically related to a kind of medical apparatus and instruments of getting involved blood vessel, and particularly a kind of intracranial vessel is got pin device.

Background technology

Acute ischemic cerebral apoplexy is that the unexpected obstruction owing to the brain blood flow causes the neural tissue injury that the local brain tissue ischemic necrosis causes.70% ~ 80% has serious symptoms need to do the obstruction that arteriographic patient can see embolus or thrombosis.Than the fatality rate of great vessels embolism 53% ~ 92%.

The logical again of blood vessel is the key for the treatment of acute ischemic cerebral apoplexy.The conventional method for the treatment of acute ischemic cerebral apoplexy comprises two large classes at present: get involved thrombolytic and machinery and get bolt.

Getting involved thrombolytic is that conduit injects thrombolytics near the endovascular focus at pathological changes place, in the very high thrombolytics concentration of the local moment formation of focus, thereby accelerates thromboembolism speed, and then increases the chance of revascularization.But vein or tremulous pulse thromboembolism treatment are to the near-end thrombosis poor effect of internal carotid artery end and middle cerebral artery M 1 segment, and this is excessive relevant with the blood clot absolute volume to a great extent.Correlational study finds, and the average external volume of the thrombosis of internal carotid artery end (0.4ml) is than the large order of magnitude of volume of the thrombosis (0.03ml) of middle cerebral artery M2 section.So large blood clot load obviously can be resisted the Digestion of streptokinase.Therefore, need very heavy dose of Thrombolytic Drugs just can make so large dissolution of blood clot, but easily like this cause various complication, risk is higher.

Machinery is got bolt and is comprised following several method: thrombectomy, and it is comparatively thorough that this method is got bolt, but excessive to vascular damaged, very easily causes various concurrent inflammation; The broken bolt of laser, this method operation easier is large, and laser energy is crossed low then invalid, the too high then injured blood vessel of energy, and equally easily cause various complication; Catching device is got bolt, and this method is simple to operate, and is very little to vascular damaged, but often can not entangle blood clot; Catch the bolt net and get bolt, this method is simple to operate, but the bolt dictyosome is long-pending can't to be used in intracranial vessel greatly because catching.

Chinese utility model patent 03210077.9 discloses a kind of elliposoidal blood vessel distal protector; it comprises the fusiform elliposoidal protector main body that is provided with skeleton and the polymeric membrane of porous; polymeric membrane covers skeleton top; with allow normal blood flow by and will be lived by the speckle that comes off or the solid particles such as thrombosis that form filter, thereby protection downstream blood vessel is not blocked.200620164685.4 of Chinese utility model patents disclose a kind ofly gets the bolt device for artery of lower extremity, it is comprised of umbrella, spindle rod, push-pull bar, internal and external casing, overcoat tube core, umbrella is made by shape-memory alloy wire, by two long one short three-jaws by certain angle and main shaft dried weld together form, and the umbrella periphery is lived thrombosis with network structure with filter.U.S. Patent application 2007/0005103,2008/0243170,2011/0098738 also discloses the pin device of catching of like configurations, and drainage screen or film that it includes framework and is attached to framework are lived thrombosis in order to filter.Above-mentioned to get the pin device volume larger, thereby can't use in intracranial vessel.

Chinese invention patent application 01114889.6 discloses a kind of recyclable temporary thrombus filter that can be used for intracranial vessel, and it is comprised of filter, guide head, guide bar, connector and epitheca, and its middle filtrator is formed by the shape-memory alloy wire braiding.U.S. Patent application 2011/0160763 also discloses a kind of pin device of getting that can be used for intracranial vessel, and it comprises skeleton, and skeleton can be formed by the shape-memory alloy wire braiding, to catch thrombosis.When these are got pin device and reclaim after catching thrombosis, thrombosis fixing insecure, easily come off and complex structure.

Therefore, need a kind of improved intracranial vessel to get pin device, this device should satisfy following condition: 1) get the bolt process simply, conveniently; 2) volume is little, can be transported to easily the distal vessels of intracranial; 3) adherent property and compliance are good, and capture rate is high, and support force is moderate, and getting in the bolt process not can the injured blood vessel inwall; When 4) after catching thrombosis, reclaiming, thrombosis fixation, difficult drop-off.

Summary of the invention

For this reason, the utility model proposes a kind of intracranial vessel and get pin device, this is got pin device and comprises and get bolt device, guiding wire, push-and-pull seal wire and epitheca pipe.Guiding wire is used for importing in the blood vessel, gets the bolt device and then links to each other with the push-and-pull seal wire, mounted push-and-pull seal wire and get the bolt device and held in the epitheca pipe by pressure.Getting the bolt device can change between retrieving position and expanded position by the push-and-pull of push-and-pull seal wire, at retrieving position, get the bolt device and be recycled in the epitheca pipe, at expanded position, get the bolt device and be pushed out outside the epitheca pipe, launch to form cavity getting under the intrinsic radial support power of bolt equipment material.The pin device of getting of the present utility model is characterised in that: get the bolt device and be made of at least four bars, described bar is along circumferentially spaced apart, one end is fixed in the push-and-pull seal wire at the far-end of push-and-pull seal wire, at expanded position, described bar launches to form the structure of a hollow three-dimensional, and blood vessel wall is fixed thrombosis thereby bar embedding thrombosis inside reclines.In this way, get pin device and not only can fixedly secure thrombosis, and can effectively prevent coming off of smaller size smaller thrombosis.

According to this utility model, get the bolt device and consisted of by many bars, at expanded position, described bar forms similar elliposoidal or spherical hollow three-dimensional structure.When the bolt device was got in conveying, getting the bolt device had less external diameter in the epitheca pipe of packing into the time.In this way, the pressure that reduces to get the bolt device is held volume, conveniently is transported to distal vessels.Certainly, the hollow three-dimensional of other shape structure also is possible, as long as bar can embed the thrombosis inside blood vessel wall that reclines upon deployment.

According to this utility model, get the bolt device by the metal wire material with shape memory effect or have that elastomeric macromolecule silk material forms and through heat treatment shaping.Suitable material for example is the NiTi alloy.Make like this compliance and the adherent property of getting the bolt device good.According to this utility model, bar is wide can be 0.05mm-0.3mm, and bar is thick can be 0.05mm-0.3mm; Bar length can be 10mm-25mm.

Preferably, bar is along circumferentially evenly distributing.Certainly, bar also can distribute along circumferential asymmetry evenly.

Preferably, to the intracavity depression, bar is divided into internal layer bar and outer bar to a part of bar thus upon deployment.

Preferably, the internal layer bar is wavy depression to intracavity.

Preferably, outer bar is along circumferentially even interval, and internal layer bar edge is circumferentially with 60-180 degree interval.

Preferably, the push-and-pull seal wire of getting pin device and the traction junction point of getting the bolt device are arranged in the far-end of push-and-pull seal wire.Active force evenly distributes when getting the bolt device withdrawing like this, and needed power is less.

Utilize taking thrombus device of the present utility model, have less conveying external diameter, compliance, propelling movement property are better, have better adherent property after the expansion.In addition, get the bolt device the part bar the depressed design forming hierarchy that is interspersed, the thrombosis that can firmly hold and catch effectively prevents from getting pin device the coming off of thrombosis in removal process.

Description of drawings

By the detailed description of with reference to the accompanying drawings this utility model embodiment being carried out, feature of the present utility model and advantage thereof will be apparent.In the accompanying drawings:

Figure 1A-1B is that the pin device of getting of this utility model embodiment is in general illustration under retrieving position and the expanded position getting the bolt device.

Fig. 2 A-2C be this utility model embodiment the first embodiment get front view, top view and the perspective view of bolt device under expanded position.

Fig. 3 A-3C be this utility model embodiment the second embodiment get front view, top view and the perspective view of bolt device under expanded position.

Fig. 4 A-4B be this utility model embodiment the 3rd embodiment get perspective view and the top view of bolt device under expanded position.

Fig. 5 A-5C be this utility model embodiment the 4th embodiment get front view, top view and the perspective view of bolt device under expanded position.

The specific embodiment

Describe with reference to the accompanying drawings embodiment of the present utility model in detail.

For convenience of description, below describe and used term " near-end " and " far-end ", wherein " near-end " refers to the end close to the operating side, and far-end refers to the end away from the operating side.

Figure 1A-1B shown and got the general illustration of pin device 1 under retrieving position and expanded position, and it comprises guiding wire (not shown), push-and-pull seal wire 2,epitheca pipe 4 and gets bolt device 10.Getbolt device 10 and link to each other with push-and-pull seal wire 2, mounted push-and-pull seal wire 2 and getbolt device 10 and pressed and hold in the epitheca pipe 4.Gettingbolt device 10 can change between retrieving position and expanded position by the push-and-pull of push-and-pull seal wire 2, at retrieving position, getsbolt device 10 to be recovered in theepitheca pipe 4, shown in Figure 1A.At expanded position, getbolt device 10 and be pushed out into outside theepitheca pipe 4,form cavity 5 and fit withblood vessel wall 6, as shown in Figure 1B.In addition, shown in Fig. 2-5, get and also be provided with developingmark 30 on thebolt device 10, getbolt device 10 to help the location.Also be provided with developingmark 8 on the epitheca pipe, shown in Figure 1A-1B.

Get thatbolt device 10 is formed by the metal wire material with shape memory effect (such as the NiTi alloy) and through heat treatment shaping.The suitable dimension of gettingbolt device 10 is as follows:length 10 ~ 25mm, the wide 0.1mm ~ 0.3mm of bar, the thick 0.1mm ~ 0.2mm of bar.Can replace metal material with elastomeric macromolecular material.Above-mentioned suitable material is well-known to those skilled in the art, is not described in detail at this.Then, will getbolt device 10 and be connected with push-and-pull seal wire 2, mounted push-and-pull seal wire 2 and getbolt device 10 and pressed and hold in theepitheca pipe 4.

Getbolt device 10 and form approximate elliposoidal or sphere at expanded position.Make like this and getbolt device 10 and have good radial support power and shape memory effect, have the preferably adherent property of blood vessel after fromepitheca pipe 4, being discharged into blood vessel.

Push-and-pull seal wire 2 and the traction junction point of gettingbolt device 10 are arranged in the far-end of push-and-pull seal wire.Active force evenly distributes when gettingbolt device 10 withdrawing like this, and needed power is less.

Fig. 2 A-5C has shown the detailed structure of the embodiment that getsbolt device 10.

Fig. 2 A-2C shows that gettingbolt device 10 is made of 6bars 20, and bar is along circumferentially even interval.Whole getting forms approximate elliposoidal afterbolt device 10 launches, and can fit with blood vessel wall well.This bar structure makes getsbolt device 10 and has less external diameter at retrieving position, theepitheca pipe 4 of being convenient to pack into.

Fig. 3 A-3C shows another structure getbolt device 10, and it is made of 6bars 20, wherein have 2 bars to thechamber 5 sunken insides and interval 180 degree, outer field all the other 4 bars are along circumferentially evenly distributing with 90 degree intervals.Whole getting forms approximate elliposoidal afterbolt device 10 launches, and can fit with blood vessel wall well.In addition, in getting the bolt process, 2 bars andouter field 4 rod component layer structures of internal layer, the bar of internal layer can embed better thrombosis inside and fix thrombosis and make its difficult drop-off.

The modification of gettingbolt device 10 shown in Fig. 4 A-4B displayed map 3A-3C, it is made of 8bars 20, wherein have 4 bars to thechamber 5 sunken insides and each interval 90 degree, outer field all the other 4 bars are along circumferentially also evenly distributing with 90 degree intervals.

Fig. 5 A-5C shows the another structure of gettingbolt device 10, and it is made of 6bars 20, wherein has 3 bars to be wavy depression and each interval 120 degree inchamber 5, and outer field all the other 3 bars are along circumferentially evenly distributing with 120 degree intervals.Whole getting forms approximate elliposoidal afterbolt device 10 launches, and can fit with blood vessel wall well.In addition, in getting the bolt process, the bar of internal layer and outer field rod component layer structure, the internal layer bar can embed better thrombosis inside and fix thrombosis and make its difficult drop-off, and outer bar and blood vessel wall are fitted, thus removal of thromboses better.

The using method of getting pin device 1 of above-described embodiment is as follows:

In interventional therapy, at first determine the intracranial vessel lesion locations by angiography, then will get in the pin device 1 importing blood vessel from femoral artery or brachial artery, make guiding wire pass lesion locations, by guidingwire epitheca pipe 4 is passed lesion locations and 8 location of the developing mark by on theepitheca pipe 4, get during thistime bolt device 10 and be positioned atepitheca pipe 4 always, be in retrieving position.Then, withdraw guiding wire, will getbolt device 10 by push-and-pullseal wire 2 and shiftepitheca pipe 4 far-ends onto, withdrawepitheca pipe 4, will getbolt device 10 and discharge at the lesion locations place, can locate and getbolt device 10 by getting developingmark 30 on the bolt device 10.Because the shape memory effect of shape memory metal or the elastic reaction of high resiliency macromolecular material, getbolt device 10 and under the effect of blood heat, be transformed into expanded position by the intrinsic radial support power of material,bar 20 embeds the thrombosis inside blood vessel wall that reclines, thereby fixes thrombosis.Then, fixedly the position ofepitheca pipe 4 spurs push-and-pull seal wire 2, withdraws and getsbolt device 10, is recovered in theepitheca pipe 4 until will get bolt device 10.At last, will get pin device 1 integral body and withdraw from outside the human body, finish the bolt process of getting.

The key of getting pin device according to intracranial vessel of the present utility model is: get the bolt device and be made of many bars, at expanded position, described bar forms similar elliposoidal or spherical structure, thereby bar embeds the inner thrombosis of fixing of thrombosis.In addition, the part bar of getting the bolt device caves inward, and has formed the hierarchy that is interspersed, and can embed better thrombosis inside and fix thrombosis.

It will be understood by those skilled in the art that above description is exemplary.In the situation that do not deviate from thought of the present utility model and scope, those skilled in the art still can make numerous modifications and variations to this utility model.For example, get the bolt device and be not limited to approximate elliposoidal or sphere at the structure of expanded position, but can be other D structure.In addition, in the above-described embodiments, bar is along circumferentially even interval.But, can expect, bar also can be spared the interval, ground along circumferential asymmetry, can interval 60-180 degree such as the internal layer bar.Equally, also interval unevenly of outer bar.

Claims (7)

1. an intracranial vessel is got pin device, this is got pin device and comprises and get the bolt device, guiding wire, push-and-pull seal wire and epitheca pipe, guiding wire is in order to guide in blood vessel, getting the bolt device then links to each other with the push-and-pull seal wire, mounted push-and-pull seal wire and get the bolt device and held in the epitheca pipe by pressure, wherein getting the bolt device can change between retrieving position and expanded position by the push-and-pull of push-and-pull seal wire, at retrieving position, getting the bolt device is recycled in the epitheca pipe, at expanded position, getting the bolt device is pushed out the epitheca pipe outward and forms cavity, it is characterized in that: get the bolt device by consisting of along circumferentially spaced at least four bars, described bar one end is fixed in the push-and-pull seal wire at the far-end of push-and-pull seal wire, and at expanded position, described bar launches to form hollow three-dimensional structure.

2. intracranial vessel according to claim 1 is got pin device, it is characterized in that described bar by the metal bar with shape memory effect or has that elastomeric polymer rod bar forms and through heat treatment shaping.

3. intracranial vessel according to claim 1 is got pin device, it is characterized in that described bar is along evenly circumferential or uneven distribution.

4. each described intracranial vessel is got pin device according to claim 1-3, it is characterized in that a part of bar in the described bar is to the cavity sunken inside.

5. intracranial vessel according to claim 4 is got pin device, it is characterized in that described a part of bar is wavy depression in cavity.

6. intracranial vessel according to claim 4 is got pin device, it is characterized in that described a part of bar edge is circumferentially with 60-180 degree interval.

7. each described intracranial vessel is got pin device according to claim 1-3, it is characterized in that push-and-pull seal wire and the traction junction point of getting the bolt device are arranged in the far-end of push-and-pull seal wire.

Images