A kind of support with thrombus capturing means takes bolt deviceTechnical field
The present invention relates to medical instruments field, particularly to one kind can prevent blocking remote blood after thrombus breaks looseThe support with thrombus capturing means of pipe takes bolt device.
Background technology
Cerebral arterial thrombosis is a kind of disease triggered by brain blood supply arteriarctia or occlusion, brain tissue can be caused badExtremely, need to make revascularization within the shortest time after its generation.Clinically to the treatment side of cerebral arterial thrombosis caused by thrombusMethod mainly takes bolt including two kinds, i.e. medicine thrombolysis and machinery.Machinery takes bolt as a kind of new thrombus treatment method, especially fitsIt is undesirable or be not suitable for the patient of thromboembolism treatment for thrombolytic effect.
Support takes bolt to be that a kind of machinery occurred recently takes bolt method, and this method is in the auxiliary of medical imaging technologyHelp down, take bolt device to deliver at blood vessel embolism on support through conduit and make it discharge, support takes bolt device voluntarily to deploy, and relies on itselfExpansionary force it is chimeric with thrombus, then reclaim take bolt device, thrombus is taken out of.
Chinese invention patent CN103417257B discloses a kind of intracranial vascular thrombus removal equipment, and this takes the spiral shape of pin deviceThe distribution density of net ring element is different, and distal end distribution is closeer, and near-end distribution is then relatively sparse, can effectively prevent microthrombus from taking offFall.Chinese invention patent CN103997976A disclose it is a kind of take bolt cage with elongated axis and circumference, including common limitThe slender member of multiple open cells, this takes bolt cage effectively to remove embolism.Chinese invention patent CN105726088A is publicOpen a kind of thrombus withdrawing device, include the support and core filaments of netted self-inflated, stent expansion state is cylindrical shape, near-end toolHave an opening, distal end is closed, the thrombus withdrawing device can by thrombus it is uniform it is embedding be hung on the axial mesh of support, the thrombus fragment of generation leads toMount proximal end opening is crossed to enter inside it, and the remote collection being closed.United States Patent (USP) US2012/0245671A1 discloses onePlanting improves the intravascular stent of adherence quality, should include multiple row and the bridge muscle between adjacent column, support also includes and bindiny mechanismConnected conical section.The support can be as taking bolt device to use, and when support deploys in thrombus, lap can be provided and caughtThe ability with retaining thrombus is obtained, anti-tampon drops.Support disclosed in above-mentioned patent takes bolt device or takes pin device to be metal tubeMaterial laser engraving is formed, and the cross sectional shape of middle equal-diameter part still maintains the hollow structure of tubing, and the ability of fixed thrombus hasLimit.
Chinese invention patent CN103417261B discloses a kind of intracranial vascular thrombus removal equipment, and this takes pin device in tube chamberA number of " hangnail " is provided with wall, thrombus can be fixed, thrombus breaks loose is prevented.Chinese invention patent CN10400635ADisclose one kind to take bolt device and take pin device, it is on network structure provided with multiple indents with three-D profile for stretching into inner chamberBar, this, which takes bolt device and takes pin device to improve, catches bolt stability, prevents thrombus breaks loose.Chinese invention patent CN105662534ADisclose and thorn is set respectively on a kind of taking thrombus device and its thrombus treating apparatus with bayonet fittings, the muscle of its unit gridShape structure, each bayonet fittings extend to intracavitary, by curved blood vessel or can reach the thinner blood vessel in distal end.Above-mentioned patent is publicThe support opened takes bolt device or takes pin device and still formed for metal pipe material laser engraving, and is provided with some hangnails by structure designOr projection, and tilted to lumen wall, to play a part of fixed thrombus, but the hangnail or projection of the offer of above-mentioned patent areAlong taking what bolt device axial direction was set, area of section is smaller, fixes the limited in one's ability of thrombus, above-mentioned hangnail or projection are taking in additionAlso there is the risk for scratching blood vessel in bolt device removal process.
United States Patent (USP) US2016/0113665A1 discloses a kind of grumeleuse for being used to remove blocking grumeleuse from blood vessel and collectedDevice, the device includes inner side slender bodies and outside slender bodies, wherein inner side slender bodies has conveying form and the expansion of compressionUnfoldable shape, outside slender bodies can coat inner side slender bodies, and the device can prevent grumeleuse or clot fragments during bolt is takenDropped to distal end.But said apparatus is Multilayer metal tube engraving, nesting and is welded, rather than single metal pipe material laser carvingQuarter forms, and this can increase the external diameter taken under bolt device feed status, and reduction takes the compliance of bolt device.
As described above, current support is taken bolt device or takes pin device to be limited by structure, the chimeric position of itself and thrombus leads toThe outside of thrombus is often concentrated on, or the hangnail or projection of only small cross sections area are stretched into inside thrombus, inside thrombusContact area and the ability of fixed thrombus are extremely limited, and when pulling thrombus, support takes bolt device or takes pin device to act on bloodPower on bolt is uneven, and thrombus easily comes off from taking on bolt device, or producing thrombus fragment blocks distal vessels.In addition, by manyAlthough the support that layer metal tube is processed takes bolt device or takes pin device to be effectively increased the contact area with thrombus, simultaneouslyAlso the problem of increase of the external diameter under feed status is reduced with compliance is brought.
For the foregoing reasons, it is necessary to which a kind of improved support takes bolt device, it can efficiently be captured and fixed thrombus, thrombusFragment will not take bolt device to come off from support and block distal vessels, while having good compliance.
The content of the invention
It is an object of the invention to provide it is a kind of can prevent blocking remote blood vessel after thrombus breaks loose carry thrombus capture portionThe support of part takes bolt device.
To reach above-mentioned purpose, what the present invention was realized in：
A kind of support with thrombus capturing means takes bolt device, and the support takes bolt device to be provided with protection pipe, protection pipe and is provided withSilk is pushed, the distal end for pushing silk is provided with thrombus capturing means.
The thrombus capturing means are made up of the cylinder of mesh with leading end, and the mesh of the cylinder of mesh is L-shaped, two netsThe junction of silk is carried towards the warp architecture inside cylinder of mesh.
The two ends of the thrombus capturing means are to set to be provided with developing mark simultaneously on leading end, near-end on taper, distal endIt is fixed together with pushing silk.Development wire coil or poly- containing developing material visual under X-ray is carried on the leading endCompound sheath, the end of leading end is hemispherical.
The thrombus capturing means are formed in one structure.The thrombus capturing means by laser cut Nitin alloy pipe andShape setting heat treatments are formed, and can be changed between contracted state and deployed condition.
It is additionally provided with the cylinder of mesh of the thrombus capturing means and takes bolt twine with blood vessel latus rectum.
According to the present invention, the push silk includes equal-diameter part and reduced diameter portion, and the radius of reduced diameter portion is near by push silkHold to distal end and be gradually reduced.The distal surface of reduced diameter portion is tied with wire coil.
The support with thrombus capturing means that the present invention is provided takes bolt device, on the one hand improve support take bolt device capture withThe ability of fixed thrombus, anti-tampon comes off blocking distal vessels during bolt is taken.On the other hand, it is because support takes bolt deviceBy single metal pipe material through Laser cutting, in the absence of the overlapping of cylinder network structure, therefore with well softIt is pliable.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existingThere is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only thisSome embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be withOther accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is structural representation of the invention.
Fig. 2 is Fig. 1 of the present invention contraction state structural representation；
Fig. 3 is the thrombus capturing means structural representation of the present invention；
Fig. 4 is Fig. 3 schematic cross-section；
Fig. 5 is Fig. 3 structure expanded schematic diagram.
Fig. 6 is the structural representation for pushing silk.
Embodiment
Support proposed by the present invention takes bolt device as depicted in figs. 1 and 2.The support takes bolt device to include thrombus capturing means 1, push awayWire feed 2 and protection pipe 3.Support, which takes, is provided with push silk 2 in the protection pipe 3 of bolt device, the distal end for pushing silk 2 is provided with thrombus capturePart 1.It is contracted state when thrombus capturing means 1 are located in protection pipe 3, protection is removed by pushing silk 2 by thrombus capturing means 1During pipe 3, thrombus capturing means 1 can voluntarily be expanded to deployed condition, and thrombus capturing means 1 can be between contracted state and deployed condition certainlyBy changing.Overall length of the thrombus capturing means 1 in deployed condition is 10 ~ 80mm, and external diameter is 1.5 ~ 6mm, and twine width is0.05 ~ 0.08mm, twine thickness is 0.05 ~ 0.10mm.
The thrombus capturing means proposed in the present invention are as shown in Figures 3 to 5.Thrombus capturing means 1 are by with leading end 13Cylinder of mesh composition, the mesh of cylinder of mesh is L-shaped, and the junction of two twines is carried towards the warp architecture inside cylinder of mesh11。
The two ends of thrombus capturing means 1 are to set to be provided with developing mark 14 simultaneously on leading end 13, near-end on taper, distal endIt is fixed together with pushing silk 2.With development wire coil visual under X-ray or containing developing material on the leading end 13Polymer jacket, the end of leading end is hemispherical.The material of development wire coil can be gold, platinum, tungsten, platinumiridio, platinumTungsten alloy etc., the material of the polymer jacket containing developing material can be tungstenic polyurethane, tungstenic block polyetheramides elastomerDeng.Support takes the material of bolt device near-end developing mark 14 to be gold, platinum, tungsten, platinumiridio, platinum-tungsten alloys etc..
Thrombus capturing means 1 are formed in one structure, are formed by laser cut Nitin alloy pipe, warp architecture 11 is by spyFixed mold enters after row constraint to the shape of thrombus capturing means 1, then completes setting by being heat-treated.
It is additionally provided with the cylinder of mesh of thrombus capturing means 1 and takes bolt twine 12 with blood vessel latus rectum.With taking for blood vessel latus rectumSpiral shape is spaced apart vertically for bolt twine 12 and warp architecture 11, and this can ensure thrombus capturing means 1 only in part to circleBent inside post net, other positions remain in that the netted section of cylinder.
The push silk proposed in the present invention is as shown in Figure 6.Pushing silk includes equal-diameter part 21 and reduced diameter portion 22, varying diameter portion22 radius is divided to be gradually reduced by push silk proximate.The distal surface of reduced diameter portion 22 is tied with wire coil 23, metalThe material of coil 23 can be gold, platinum, tungsten, platinumiridio, platinum-tungsten alloys, 304 stainless steels and 316L stainless steels etc..Push silkOverall length is 170 ~ 200cm, and the external diameter of equal-diameter part 21 is 0.3 ~ 0.5mm.
" distal end " the finger device tool is away from operator one end, and " near-end " the finger device tool is close to operator one end.
The support with thrombus capturing means that the present invention is provided takes bolt device, on the one hand improve support take bolt device capture withThe ability of fixed thrombus, anti-tampon comes off blocking distal vessels during bolt is taken.On the other hand, it is because support takes bolt deviceBy single metal pipe material through Laser cutting, in the absence of the overlapping of cylinder network structure, therefore with well softIt is pliable.