CN209203427U - Cerebral thrombosis withdrawing device - Google Patents
Cerebral thrombosis withdrawing device Download PDFInfo
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- CN209203427U CN209203427U CN201821718864.7U CN201821718864U CN209203427U CN 209203427 U CN209203427 U CN 209203427U CN 201821718864 U CN201821718864 U CN 201821718864U CN 209203427 U CN209203427 U CN 209203427U
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- pawl
- trapping
- tubular structure
- cerebral thrombosis
- withdrawing device
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Abstract
The utility model relates to a kind of cerebral thrombosis withdrawing devices, tubular structure with hollow out, and the release conditions of the loading condition and radial dilatation with radial compression, axial one end of the tubular structure is the proximal end for connecting delivery instrument, the other end is to pass through the closed distal end of net cover structure, it is additionally provided with multiple trapping pawls, each trapping pawl one end is the root being connected with tubular structure side wall, the other end is the tip for extending to tubular structure axis position, and each trapping pawl is tilted while extending by proximate.The utility model is by further increasing and taking bolt effect in the trapping pawl for taking the suitable extending direction of the directly interior setting of bolt and development length.
Description
Technical field
The utility model belongs to medical instruments field, more particularly, to implements the cerebral thrombosis that machinery takes bolt to treat and takes out dress
It sets.
Background technique
The treatment method of Intracranial thrombus is mainly drug thrombolysis and mechanical thrombolysis, but there are thrombolysis successes for drug thromboembolism treatment
The problem of rate is low and time window narrow (less than 4.5 hours), in contrast, it is small that the time window that machinery takes bolt to treat can extend to 8
When and take bolt success rate higher, therefore machinery take bolt have become at present treatment patients with acute ischemic stroke most important one
Means.
Thrombus is broadly divided into following several types:
1, white thrombus (pale thrombus), be mainly made of in coralloid blood platelet girder many aggregations, table
There are many neutrocytes to adhere in face, forms leucocyte boundary layer, thus it is speculated that is since the chemotaxis of cellulose disintegration product attracts
?.Between blood platelet girder due to the effect for the coagulation factor being activated the webbed cellulose of shape, contain in mesh
A small amount of haemocyte.It is in canescence that naked eyes, which are seen, and rough surface has ripple, and matter is hard, is close to vascular wall.
2, red thrombus (redthrombus), it is in kermesinus that naked eyes, which are seen, and fresh red thrombus is wet, there is certain bullet
Property, outmoded red thrombus becomes drying since moisture is absorbed, frangible, follows the string, and easy to fall off causes embolism.
3, mixed thrombus (mixed thrombus) takes on a red color alternate layer by layer with white stripes, also or canescence and red
The alternate layer structure of brown.
4, hyaline thrombus (hyaline thrombus), is mainly made of cellulose.
Conventional cerebral thrombosis withdrawing device is usually only capable of capture red thrombus and mixed thrombus, it is difficult to capture the blood of labyrinth
Bolt, especially structure be longer, larger or harder white thrombus and hyaline thrombus are fallen.
Utility model content
Based on this, it is necessary to take bolt effect for improve bulk and harder thrombus, provide a kind of improved cerebral thrombosis
Withdrawing device.
A kind of cerebral thrombosis withdrawing device, the tubular structure with hollow out, and loading condition and diameter with radial compression
To the release conditions of expansion, axial one end of the tubular structure is the proximal end for connecting delivery instrument, and the other end is to pass through
The closed distal end of net cover structure is additionally provided with multiple trapping pawls, and each pawl one end that traps is the root being connected with tubular structure side wall, separately
One end is the tip for extending to tubular structure axis position, and each trapping pawl is tilted while extending by proximate.
Several optional ways also provided below, but be not intended as the additional qualification to above-mentioned overall plan, only into
The supplement of one step is preferred, and under the premise of no technology or logical contradiction, each optional way can be individually for above-mentioned totality side
Case is combined, and be can also be and is combined between multiple optional ways.
Optionally, under release conditions, each tip position for trapping pawl is freely suspended in the inner cavity of tubular structure.
Optionally, under release conditions, under release conditions, in addition to root, remaining position is freely suspended in each pawl that traps
In the inner cavity of tubular structure.
Optionally, the trapping pawl and the molding of tubular structure integrated woven or integrated excision forming.
Optionally, under release conditions, the part or all of trapping pawl is warp architecture on the whole, curved depressed area
It is proximally facing.
Optionally, the trapping pawl includes the plurality of rods body of one or bifurcation structure；Plurality of rods body is at the tip of trapping pawl
It converges at one, each body of rod is mutually divergent in the root of trapping pawl and is connected to the corresponding position of tubular structure side wall.
Optionally, the body of rod is one, in the released state, between body of rod two end point connecting line and the axis of tubular structure
Angle is 10 degree~60 degree.
Optionally, the body of rod is two, and two bodies of rod are converged at the tip of trapping pawl with rounded structure.
Optionally, the body of rod is two, and in the released state, the line between the two-end-point of the every body of rod is as first
Line of reference, the angle between two first line of reference corresponding to two bodies of rod is 30 degree~60 degree.
Optionally, the body of rod is two, and in the released state, the line between the two-end-point of the every body of rod is as second
Line of reference, two second line of reference corresponding to two bodies of rod determine a reference plane, the axis of the tubular structure and the reference plane
Between angle be 10 degree~60 degree.
Optionally, the body of rod is two, and in the released state, the line between the two-end-point of the every body of rod is as second
Line of reference has the bisector coplanar with two second line of reference between two second line of reference corresponding to two bodies of rod, described
Angle is 10 degree~60 degree between bisector and the axis of tubular structure.
Optionally, the body of rod is two, and in the released state, the line between the two-end-point of the every body of rod is as second
Line of reference, two second line of reference corresponding to two bodies of rod determine a reference plane；
The axis of the tubular structure is projected as projection line in the reference plane；
Angle is 10 degree~60 degree between the axis of the tubular structure and the projection line.
Optionally, the body of rod is two, and line midpoint and place of two bodies of rod at trapping radix unguis portion trap pawl point
The line at end is third line of reference；Angle is 10 degree~60 degree between the axis of the tubular structure and the third line of reference.
Optionally, the trapping pawl is distributed one group in the axial direction of tubular structure or is spaced apart multiple groups, with catching in group
Collection pawl includes at least two and successively arranges in tubular structure circumferential direction.
Optionally, under release conditions, there is the mutually adjacent trend embraced with the tip in group trapping pawl.
Optionally, in same group trapping pawl, adjacent two trapping pawl position in the axial direction of tubular structure is identical or dislocation is arranged.
It is 2,4 or 6 with group trapping pawl, dislocation is spaced in the axial direction of tubular structure.
It is 2~4 with group trapping pawl, the successively dislocation in the same direction in the axial direction of tubular structure.
Optionally, the tubular structure includes multiple grid cells, includes at least first unit and second in grid cell
Unit, the grid area of single second unit are 2~6 times of the grid area of single first unit, the root of the trapping pawl
It is connected with corresponding second unit.
Optionally, under release conditions, the area of the first unit is 5~10mm2, the area of the second unit is 20
~30mm2。
Optionally, at least two adjacent first unit open communications form a corresponding second unit.
Optionally, open communication forms a corresponding second unit between four first units adjacent to each other.
Optionally, under loading condition, the trapping pawl is in connected second unit.
Optionally, under loading condition, the root of the trapping pawl is located at the proximal end position in the second unit of place, described to catch
The tip for collecting pawl extends towards the distal end in the second unit of place.
Optionally, the distal site under loading condition, where the tip of the trapping pawl extends in second unit.
Optionally, each second unit is mutually non-conterminous or at least there are two second unit is adjacent.
Optionally, in the cerebral thrombosis withdrawing device at least in the middle part of proximal end, distal end, the axial direction at least one at setting it is aobvious
Shadow point.
Optionally, the tubular structure proximal end has a plurality of connecting rod gradually gathered, for being connect with delivery instrument,
A plurality of connecting rod gathers position equipped with proximal end development point.
Optionally, the distal end of the net cover structure is gathered, and is equipped with distal end development point gathering position.
Optionally, development point in middle part is equipped on the side wall of the tubular structure or trapping pawl.
Optionally, partly or entirely the tip position of trapping pawl is provided with development point.
Optionally, trapping the development point on pawl is annular or vertical bar shape.
Optionally, under release conditions, all development points on each trapping pawl are arranged along the axis of tubular structure, are formed
Development mark axis.
Optionally, the net cover structure is beveled structure, which includes the bar portion of more radiation profiles；The pipe
Shape structure includes multiple grid cells, the position in succession of the proximal end of each bar portion and tubular structure be grid cell vertex or
The connecting portion of adjacent two grid cell.
The utility model is by taking the directly interior trapping pawl that suitable extending direction and development length is arranged of bolt, further
Raising takes bolt effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cerebral thrombosis withdrawing device in an embodiment；
Fig. 2 is the schematic diagram of wherein cerebral thrombosis withdrawing device loading condition in Fig. 1；
Fig. 3 is the expanded view of wherein cerebral thrombosis withdrawing device in Fig. 1；
Fig. 4 is the structural schematic diagram of cerebral thrombosis withdrawing device in another embodiment；
Fig. 5 is the partial schematic diagram of wherein cerebral thrombosis withdrawing device in Fig. 4；
Fig. 6 a is the expanded view of wherein cerebral thrombosis withdrawing device in Fig. 4；
Fig. 6 b is the schematic diagram that pawl warp tendency is trapped in another embodiment；
Fig. 6 c is the schematic diagram that pawl warp tendency is trapped in another embodiment；
Fig. 7~Fig. 9 is the net cover structure different angle schematic diagram of cerebral thrombosis withdrawing device in another embodiment；
Figure 10~Figure 11 is the net cover structure different angle schematic diagram of cerebral thrombosis withdrawing device in another embodiment；
Figure 12 and Figure 13 a is respectively development schematic diagram in cerebral thrombosis withdrawing device part in another embodiment；
Figure 13 b is cerebral thrombosis withdrawing device development schematic diagram after bending in Figure 13 a；
Figure 14~Figure 18 is the course of work schematic diagram that cerebral thrombosis withdrawing device captures common thrombus in another embodiment；
Figure 19 is the schematic diagram that cerebral thrombosis withdrawing device captures the larger thrombus of labyrinth in another embodiment；
Figure 20 is the schematic diagram that cerebral thrombosis withdrawing device captures frangible thrombus easy to fall off in another embodiment；
Figure 21 is the structural schematic diagram of cerebral thrombosis withdrawing device in another embodiment；
Figure 22~Figure 26 is the expanded view of cerebral thrombosis withdrawing device in different embodiments；
Figure 27 is the expanded view of cerebral thrombosis withdrawing device in another embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In order to better describe and illustrate embodiments herein, one or more attached drawing can refer to, but attached for describing
The additional detail or example of figure be not construed as creating the utility model of the application, current described embodiment or excellent
Select the limitation of the range of any one in mode.
It should be noted that it can be with when component (or component) is referred to as with another component (or component) " connection "
It is directly connect with another component or there may also be components placed in the middle.When a component be considered as " being set to " another
Component, it, which can be, is set up directly on another component or may be simultaneously present component placed in the middle.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Referring to Fig. 1, a kind of cerebral thrombosis withdrawing device in this implementation, on the whole with the tubular structure 1 of hollow out, cerebral thrombosis is taken
Device itself can be formed after thermal finalization by metal tube, such as NiTi pipe laser engraving out, in other embodiments can be with
It is woven by titanium-nickel wire.
The tubular structure 1 of the cerebral thrombosis withdrawing device of the present embodiment and the loading condition and radial expansion with radial compression
Release conditions, such as Fig. 2 under loading condition, 1 radial compression of tubular structure has lesser outer diameter, can exist with delivery sheath
Intravascular to walk until lesions position, then delivery sheath is dropped back, radial dilatation enters after the exposure in the blood vessels of tubular structure 1
Release conditions.
Axial one end of tubular structure 1 is the proximal end for connecting delivery instrument (delivery instrument is, for example, to convey silk), example
Right side one end as shown in figure 1, proximal end have sparse rod-like structure and collect as interconnecting piece 3, interconnecting piece 3 and conveying silk phase
Even, it can walk and realize in vivo and the relative motion of delivery sheath.
The other end of tubular structure 1 is example left side one end as shown in figure 1 by the closed distal end of net cover structure 2, net cover structure
2 be on the whole umbrella, by distally proximally dissipating and docking with tubular structure 1, convenient for trapping the thrombus of smaller size smaller.
The proximal end that refers in this specification distally in entirety towards upper there are identical meanings to be distally that is, under use state
One end of neighbouring lesion or thrombi, proximal end are one end far from lesion or thrombi, and operator controls brain blood in proximal end
Bolt withdrawing device.
Multiple trapping pawls 4 are additionally provided on tubular structure 1, each 4 one end of pawl that traps is the root being connected with 1 side wall of tubular structure
42, the other end is the tip 41 for extending to 1 axis position of tubular structure, and each trapping pawl 4 while extending from proximal end to remote
End inclination.
The general direction that trapping pawl 4 extends is shown in Fig. 1, tubular structure 1 in the released state, traps the tip of pawl 4
41 extend towards the axis position of tubular structure 1, and relative axis is in tilted layout on the whole, i.e., in same trapping pawl 4, tip 41
Relative to root 42 closer to distal end, tubular structure 1 is more advantageous to using such angled manner and trapping pawl 4 is filled
Carry, as tubular structure 1 and trapping pawl 4 enter delivery sheath when reprinting, trapping pawl 4 can gradually smooth out with the fingers directly, without turn over stick up to
Outside delivery sheath.
In the cerebral thrombosis withdrawing device of the present embodiment, tubular structure 1 includes multiple grid cells, has good radial branch
Support force and flexibility have very strong thrombus acquisition performance by the combination of trapping pawl 4 and distal end net cover structure 2, especially
The thrombus of labyrinth can be captured.
In cerebral thrombosis withdrawing device at least in the middle part of proximal end, distal end, the axial direction at least one at setting development point, develop point
The metal materials such as platinum-tungsten alloys, platinumiridio or tantalum alloy can be used, but not limited to this, it is each to be distributed in cerebral thrombosis withdrawing device
Place, and good radiopacity can be provided.
In another embodiment, the settable proximal end development point 5 in 3 proximal end position of interconnecting piece, 2 distal site of net cover structure can be set
Distal end development point 6 is set, in the settable middle part development point 7 in 41 position of tip of some trapping pawls 4.
Under 1 release conditions of tubular structure, each tip position for trapping pawl 4 is freely suspended in the inner cavity of tubular structure 1
In, in a preferred embodiment, under release conditions, for each pawl 4 that traps in addition to root 42, remaining position is freely suspended in tubulose
In the inner cavity of structure 1.
In conjunction with FIG. 1 to FIG. 3, the root 42 for trapping pawl 4 is fixedly connected with adjacent cell borders, and remaining position up to
Tip 41 is suspended in locating cell, under 1 release conditions of tubular structure, each axis for trapping 4 interception tubular structure 1 of pawl
Line direction, and there is no other components to fetter, that is, is suspended in the inner cavity of tubular structure 1, is more convenient for adapting to and be anchored enter pipe
Thrombus of different shapes in 1 inner cavity of shape structure.
In another embodiment, it can respectively be cut using integrated woven molding or one between trapping pawl 4 and tubular structure 1
Molding.
In another embodiment, under release conditions, partly or entirely trap pawl 4 is warp architecture on the whole, curved recessed
Concave portion position is proximally facing.I.e. trapping pawl 4 moves closer to pipe while extending to distal end from root to tip in curved manner
The axis of shape structure；Curved concave surface is proximally facing to be interpreted as being approximately towards, i.e., for distal end, curved shape is arc
Shape or similar and arc, more adjacent to tip, to tubular structure axis to draw close trend faster.
Part or all of or trapping pawl is the warp architecture of These characteristics on the whole, it is thus understood that at least a part of trapping
Pawl uses warp architecture, naturally it is also possible to be the warp architecture that all trapping pawls are all made of These characteristics.
Since the trapping pawl under release conditions is likely to be three-dimensional structure, warp architecture is interpreted as trapping the whole of pawl
Shape feature extends not along straight line or in a certain plane, but extend in a certain curved surface or slightly complicated space.
If not using the warp architecture of These characteristics, for a certain trapping pawl, its own is along linear extension or extremely
It is few to extend in a certain plane, for example, in another embodiment, under release conditions, each pawl that traps is rod-shaped and respectively along straight line
Extend.In another embodiment, under release conditions, each pawl that traps extends in respectively locating plane respectively.
Under release conditions, by trap pawl 4 by root 42 to tip 41 along camber line extension for, elliptic arc or similar curve are same
Reason, the center of circle of camber line is in the proximal lateral of the trapping pawl 4, i.e., trapping pawl 4 is on the whole along arc path towards the axial direction of tubular structure 1
Extend, the geometry designs of radial gradual, it is easier to capture the thrombus of labyrinth；
In another embodiment, trapping pawl 4 includes the plurality of rods body of one or bifurcation structure；Plurality of rods body is in trapping pawl 4
Tip 41 converge at one, each body of rod is mutually divergent in 42 side of root of trapping pawl 4 and is connected to tubular structure side wall
Corresponding position.
In another embodiment, the body of rod is one, under release conditions, the axis of body of rod two end point connecting line and tubular structure it
Between angle be 10 degree~60 degree.The body of rod itself can be to straight-bar or uses above-mentioned warp architecture.All trapping pawls can
To use straight-bar entirely；Or above-mentioned warp architecture is used entirely；Or part uses above-mentioned warp architecture using straight bar part.
In another embodiment, the body of rod is two, and the respectively body of rod 43 and the body of rod 44, the body of rod 43 and the body of rod 44 is trapping
It is converged at the tip 41 of pawl 4, in order to improve safety, in another embodiment, the body of rod 43 and the body of rod 44 are converged with rounded structure
It is poly-.
In another embodiment, the body of rod is two, and the respectively body of rod 43 and the body of rod 44, the body of rod 43 and the body of rod 44 is trapping
It is converged at the tip 41 of pawl 4, in the released state, line between the two-end-point of the every body of rod is as the first line of reference, and two
Angle between two first line of reference corresponding to the body of rod is 30 degree~60 degree.Angle between two first line of reference affects two
The trend that the root body of rod is mutually drawn close, the more big trend mutually drawn close of angle are more obvious.
Conversely, the smaller trend mutually drawn close of angle is more unobvious, trapping pawl 4 is also longer and narrower on the whole, therefore two first
Suitable angle also has certain influence to the trapping effect of thrombus between line of reference, and preferred model is provided in the present embodiment
It encloses, more conducively raising thrombus traps effect.
In conjunction with Fig. 4~Fig. 6 a, in another embodiment, the main distinction is in expanded view, the unit arranged in width direction
Lattice negligible amounts, the quantity for the trapping pawl 4 arranged in width direction are three, surround after tubular structure 1 have it is lesser straight
Diameter.And the quantity for the trapping pawl 4 arranged in expanded view width direction in FIG. 1 to FIG. 3 is four, is had after surrounding tubular structure 1
Biggish diameter.
Pawl 4 is trapped in the present embodiment, under release conditions and also uses warp architecture on the whole, i.e., from root to tip to remote
End moves closer to the axis of tubular structure in curved manner while extension；Curved concave surface is proximally facing, and curved shape is
Arc or similar and arc, more adjacent to tip, to tubular structure axis to draw close trend faster.
The body of rod that each trapping pawl 4 includes in Fig. 4~Fig. 6 a is two, the respectively body of rod 45 and the body of rod 46, in release shape
Under state, line between the two-end-point of the every body of rod as the second line of reference, two second line of reference corresponding to two bodies of rod it
Between have the bisector 47 coplanar with two second line of reference, angle is 10 degree between bisector 47 and the axis L of tubular structure 1
It~60 degree, can also be further preferred 30 degree~60 degree.
Angle determines the trend of trapping 4 oblique bending of pawl between bisector 47 and the axis L of tubular structure 1, suitably
Trend also has certain influence to the trapping effect of thrombus, and preferred range is provided in the present embodiment, more conducively raising thrombus
Trap effect.
Referring to Fig. 6 b, in another embodiment, the body of rod that each trapping pawl 4 includes is two, the respectively body of rod 45 and the body of rod
46, in the released state, line between the two-end-point of the every body of rod is as the second line of reference, two corresponding to two bodies of rod
Two line of reference (two root thickness solid line in figure) determine a reference plane M；Angle is 10 degree between the axis L and the reference plane of tubular structure
~60 degree.Or the axis L of tubular structure is projected as projection line L` on reference plane M；Angle between axis L and projection line L`
It is 10 degree~60 degree.
Angle determines the trend of trapping 4 oblique bending of pawl between axis L and projection line L`, and suitable trend is to thrombus
Trapping effect also has certain influence, and preferred range is provided in the present embodiment, and more conducively raising thrombus traps effect.
Referring to Fig. 6 c, in another embodiment, the body of rod that each trapping pawl 4 includes is two, the respectively body of rod 45 and the body of rod
46, in the released state, the line of line midpoint P and trapping pawl point end O of two bodies of rod at trapping radix unguis portion are third ginseng
According to line OP；Angle is 10 degree~60 degree between the axis L and third line of reference OP of tubular structure.
Angle determines the trend of trapping 4 oblique bending of pawl between axis L and third line of reference OP, and suitable trend is to blood
The trapping effect of bolt also has certain influence, and preferred range is provided in the present embodiment, and more conducively raising thrombus traps effect.
Multiple trapping pawls 4 form the three-dimensional space for thrombus insertion.Radial direction of the adjacent body of rod in tubular structure 1
Fine and close grid cell is formed on section, can effectively intercept falling off for thrombus.
In another embodiment, trapping pawl is distributed one group in the axial direction of tubular structure or is spaced apart multiple groups, such as Fig. 3
In, it can be considered one group of trapping pawl in each dotted line frame, be divided into be furnished with three groups on the whole, pawl is trapped in Fig. 6 and is divided into cloth on the whole
There are two groups.
Two are included at least with the trapping pawl in group and are successively arranged in tubular structure circumferential direction.Such as in group in Fig. 3
Trapping pawl be four, in Fig. 6 with the trapping pawl in group be three, with group trapping pawl in, it is adjacent two trapping pawl in tubular structure
Axial direction on position it is identical or dislocation arrangement.
Under release conditions, with group trapping pawl in tip have the mutually adjacent trend embraced, can effectively intercept thrombus with
The tubular structure 1 of hollow out constitutes the three-dimensional space for thrombus insertion, and the fixed fastness of thrombus is greatly improved.
In another embodiment, it is 2,4 or 8 with group trapping pawl, dislocation is spaced in the axial direction of tubular structure.
It in another embodiment, is 2~4 with group trapping pawl, the successively dislocation in the same direction in the axial direction of tubular structure.
In another embodiment, tubular structure 1 includes multiple grid cells, such as it can be seen that in grid cell at least in Fig. 3
Including first unit 12 and second unit 11, the grid area of single second unit 11 is the grid area of single first unit 12
2~6 times, such as 4 times, the root 42 for trapping pawl is connected with corresponding second unit.
Each grid cell preferably uses closed loop configuration, has stronger radial support power, is provided with grid surface in this implementation
The biggish second unit 11 of product, makes tubular structure 1 have preferable flexibility on the whole；
The biggish second unit 11 of grid area enters inside tubular structure 1 convenient for large volume of thrombus, such as Fig. 3 every
The body of rod that a trapping pawl includes is two, the respectively body of rod 43 and the body of rod 44, the proximal end and the vertex of second unit 11 of the body of rod 44
It is connected, the body of rod 43 is similarly.Trapping pawl is in both biggish 11 positions of second unit of grid area and complements each other, it is made to be easy to catch
Obtain complicated thrombus and not easy to fall off.
It can be quadrangle or hexagon, but be not limited only to this for grid cell own form.The present embodiment uses
The tubular structure 1 of two kinds of different closure grid cell composition hollow outs of area, lesser first unit 12 provide higher radial direction
Support force, and biggish second unit 11 is easy the capture thrombus that size is larger, structure is more complex and reduces and vascular wall
Contact surface.By greater lattice unit and being spaced apart compared with small grid unit, cerebral thrombosis withdrawing device can be made to have good
Radial support power and thrombus acquisition performance.
(be also considered as the area in expanded view) under 1 release conditions of tubular structure, 12 area of first unit be 5~
10mm2, 11 area of second unit about 20~30mm2。
In another embodiment, to can be at least two adjacent for first unit 12 and the constituted mode of second unit 11
12 open communication of Unit 1 forms a corresponding second unit 11；Such as using four adjacent to each other first in Fig. 3 and Fig. 6
Open communication forms a corresponding second unit between unit.
In conjunction with Fig. 2 and Fig. 3, under loading condition, trapping pawl 4 is in connected second unit 11, traps the root of pawl 4
Portion 42 is located at the proximal end position in place second unit 11, and the tip 41 of trapping pawl 4 is prolonged towards the distal end in place second unit 11
It stretches.
In order to form longer trapping pawl 4 as far as possible, under loading condition, second is single where the tip 41 of trapping pawl 4 extends to
Member 11 in distal site, i.e., fully supported as far as possible in axial direction where second unit 11, second unit 11 have it is multiple, in specific cloth
Set each second unit mutually it is non-conterminous or at least there are two second unit it is adjacent.In the present embodiment, with group trapping pawl corresponding the
It is successively adjacent in two unit circumferential directions.
Referring to Fig. 7~Fig. 9, in another embodiment, net cover structure has the knot for being in cerebral thrombosis withdrawing device distal side
Structure center, and by the structure centre towards proximal lateral radiation diverging be beveled structure, the open end of beveled structure and tubular structure
The docking of distal end.Net cover structure be related to can anti-tampon be detached from or escape, effectively avoid the generation of secondary blood vessel embolism；Knot
Structure center is in the axis position of tubular structure, can make beveled structure position more symmetrically convenient for loading.
Tubular structure is distributed several grid cells, visible first unit 13 and first unit in figure at adjacent distal end position
14, beveled structure includes more by distally proximally the bar portion of radiation profiles, net cover structure include six roots of sensation bar portion, such as in figure
Bar portion 21, bar portion 22.
The proximal end of each bar portion and the position in succession of tubular structure are the vertex of grid cell or the company of adjacent two grid cell
Socket part position.Visible bar portion 21 is connected to the adjacent regions of first unit 13 and first unit 14 in Fig. 7.
The settable development point in net cover structure position or the distal end of tubular structure, such as visible first unit distal end in Fig. 8
Vertex position setting development point 61, development point is also arranged in the vertex position of remaining first unit distal end accordingly.
Referring to Figure 10~Figure 11, in another embodiment, the difference is that net cover structure includes 12 bar portions, structure is more
For densification.Tubular structure visible first unit 15 and first unit 16 in several grid cells of adjacent distal end position distribution, figure,
Bar portion 23 in figure is connected to the vertex of first unit 15, and bar portion 24 is connected to the adjacent of first unit 15 and first unit 16
Position.
In general, net cover structure be made of the plurality of rods portion radiated or using compared with small grid unit underlap connection and
At bar portion quantity is 4~12, under release conditions, and the angle of bar portion and tubular structure axis is 15~45 °, forms size and closes
Suitable distal end grid cell, can anti-tampon fall off and escape.
Net cover structure it is more fine and close can anti-tampon fall off and escape, bar portion quantity and the folder with tubular structure axis
Angle according to having certain influence to compactness extent, can be taken into account in the preferred range of the present embodiment cerebral thrombosis withdrawing device transporting and
Compactness is easy the frangible caducous thrombus of capture, such as: red thrombus.
In cerebral thrombosis withdrawing device at least in the middle part of proximal end, distal end, the axial direction at least one at setting development point, develop point
The metal materials such as platinum-tungsten alloys, platinumiridio or tantalum alloy can be used, but not limited to this, it is each to be distributed in cerebral thrombosis withdrawing device
Place, and good radiopacity can be provided.
In conjunction with Fig. 1, in another embodiment, interconnecting piece 3 includes a plurality of connecting rod gradually gathered, is used for and delivery instrument
Connection gathers position equipped with proximal end development point 5 in a plurality of connecting rod, and proximal end development point 5 mainly passes through developing ring and spring
Circle mode is welded to cerebral thrombosis withdrawing device and delivery guidewire junction.
2 distal site of net cover structure is gathered, and is equipped with distal end development point 6 gathering position, and distal end development point 6 uses bullet
The bar portion that net cover structure 2 is gathered is welded to and collects together by spring coil form.
Develop point at the settable middle parts in 41 positions of tip of some trapping pawls 4, for example, middle part development point 71 in Fig. 3 and
Middle part development point 72, development point in middle part is annular or vertical bar shape.Corresponding trapping can be fixed on by the way of welding or riveting
The tip of pawl.
In a preferred manner, while that proximal end development point 5, distal end development point 6 and middle part development point, i.e. many places are arranged is aobvious
Shadow point runs through entire cerebral thrombosis withdrawing device, by above-mentioned several places' development structures, has its cerebral thrombosis withdrawing device whole good
Good radiopacity.
Referring to Figure 12, development effect is illustrated in round frame；Figure 13 a illustrates development effect in box.It is defeated in blood vessel 9
After sending sheath 8 to withdraw, the tubular structure 1 of cerebral thrombosis withdrawing device discharges, and the end position of delivery sheath 8 can also be with aobvious
Shadow point, develop point in the middle part of proximal end development point 5, distal end development point 6 and many places, provides to cerebral thrombosis withdrawing device good
Whole developability.
In another embodiment, under release conditions, positioned at each all development points trapped on pawl along the axis of tubular structure
Arrangement forms development mark axis L1.
For example, see Figure 12, Figure 13 a and Figure 13 b, pawl 4 is trapped along being divided axially into three groups, two of them trap pawl in every group
Tip with development point, each all development points trapped on pawl are arranged along the axis of tubular structure, form development mark axis,
In figure by taking middle part development point 73, middle part development point 74, middle part development point 75 as an example, generally axially arranges, can show and body
Existing 1 integral position of tubular structure can know tubular structure radial direction since development point in middle part is at axis position indirectly
Marginal position and relative position in the blood vessel, if development point only is arranged in 1 side wall of tubular structure, then in different perspectives
Under, there may be relatively large deviation.All development points of the present embodiment form development mark axis L1, even if in Figure 13 b midbrain
In the curved situation of thrombus withdrawing device, development mark axis L1 still can accurately reflect the axial location of tubular structure.
It is blood that referring to Figure 14~Figure 18, in another embodiment, cerebral thrombosis withdrawing device, which captures the course of work of common thrombus,
Thrombus 10 is had in pipe 9, delivery sheath 8 carries cerebral thrombosis withdrawing device and passes through thrombus area, and then delivery sheath 8 is withdrawn, brain
The release of thrombus withdrawing device, i.e., 1 radial expansion of tubular structure, thrombus 10 progress into inside the lumen of tubular structure 1, and are catching
It is positioned under the action of collection pawl 4, finally withdraws cerebral thrombosis withdrawing device, it will using the cooperation of trapping pawl 4 and distal end net cover structure
Thrombus 10 takes out, and keeps restoration of blood flow usual.
Referring to Figure 19, in another embodiment when the cerebral thrombosis withdrawing device capture longer larger thrombus of labyrinth, tubulose knot
When 1 radial expansion of structure, biggish thrombus 10 can enter inside tubular structure 1 via the biggish second unit 11 of grid area, together
When be anchored by the trapping pawl 4 of corresponding site, if grid area is lesser first unit, biggish thrombus 11 is not easily accessible
Inside tubular structure 1, it is difficult to take out, it is seen that cerebral thrombosis withdrawing device can capture the thrombus of labyrinth in the present embodiment.
Referring to fig. 20, when cerebral thrombosis withdrawing device captures frangible thrombus easy to fall off in another embodiment, tubular structure 1 is radial
When extension, broken easy thrombus 10 can enter inside tubular structure 1, while be anchored by the trapping pawl 4 that one group of group is mutually embraced, remote
Cooperation fine and close net cover structure in end, which traps thrombus, to be taken out, it is seen that cerebral thrombosis withdrawing device can capture labyrinth in the present embodiment
Thrombus.
Referring to fig. 21,1 distal end of tubular structure is with net cover structure 2 certainly in another embodiment, catching on tubular structure 1
Collect pawl 4 with middle part development point 7 remaining design feature in combination with or referring to foregoing embodiments.
2~Figure 26 referring to fig. 2, in other multiple embodiments, the shape of second unit 11 and first unit 12 and
Distribution is slightly different, remaining design feature is combinable or referring to foregoing embodiments.It is double rod form that pawl 4 is trapped in each figure, Gu
Surely it is connected in corresponding second unit 11, each second unit 11, which is respectively provided with, in each embodiment traps pawl 4, in figure only wherein
Trapping pawl 4 is illustrated in one second unit 11, other second units 11 are similarly.
Referring to fig. 27, cerebral thrombosis withdrawing device is to trap pawl according to the foregoing embodiments main distinction in another embodiment
4 be single rod, and the shape and distribution and remaining design feature of second unit 11 and first unit 12 be combinable or reference
Foregoing embodiments.The distal end of trapping pawl 4 in the present embodiment under release conditions both can gradually draw close tubular structure along straight line
Axis, it is preferred to use the mode of warp architecture gradually draws close the axis of tubular structure, such as along the path of camber line or class camber line.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (12)
1. a kind of cerebral thrombosis withdrawing device, the tubular structure with hollow out, and loading condition and radial direction with radial compression
The release conditions of expansion, axial one end of the tubular structure are the proximal end for connecting delivery instrument, and the other end is to pass through net
The closed distal end of cover structure, which is characterized in that be additionally provided with multiple trapping pawls, each pawl one end that traps is to be connected with tubular structure side wall
Root, the other end is the tip for extending to tubular structure axis position, and each trapping pawl while extending from proximal end to remote
End inclination.
2. cerebral thrombosis withdrawing device according to claim 1, which is characterized in that under release conditions, each pawl that traps removes root
In addition, remaining position is freely suspended in the inner cavity of tubular structure.
3. cerebral thrombosis withdrawing device according to claim 1, which is characterized in that partly or entirely described under release conditions
Trap pawl is warp architecture on the whole, and curved depressed area is proximally facing.
4. cerebral thrombosis withdrawing device according to claim 1, which is characterized in that the trapping pawl includes one or bifurcated knot
The plurality of rods body of structure；Plurality of rods body converges at one at the tip of trapping pawl, and each body of rod is mutually divergent simultaneously in the root of trapping pawl
It is connected to the corresponding position of tubular structure side wall.
5. cerebral thrombosis withdrawing device according to claim 4, which is characterized in that the body of rod is two, in release conditions
Under, line between the two-end-point of the every body of rod is as the first line of reference, between two first line of reference corresponding to two bodies of rod
Angle be 30 degree~60 degree.
6. cerebral thrombosis withdrawing device according to claim 4, which is characterized in that the body of rod is two, in release conditions
Under, as the second line of reference, two second line of reference corresponding to two bodies of rod are determined for line between the two-end-point of the every body of rod
One reference plane, angle is 10 degree~60 degree between the axis of the tubular structure and the reference plane.
7. cerebral thrombosis withdrawing device according to claim 1, which is characterized in that axial direction of the trapping pawl in tubular structure
One group of upper distribution is spaced apart multiple groups, includes at least two with the trapping pawl in group and successively arranges in tubular structure circumferential direction
Cloth.
8. cerebral thrombosis withdrawing device according to claim 7, which is characterized in that under release conditions, in group trapping pawl
Tip has the mutually adjacent trend embraced.
9. described in any item cerebral thrombosis withdrawing devices according to claim 1~7, which is characterized in that the tubular structure includes
Multiple grid cells, first unit and second unit are included at least in grid cell, and the grid area of single second unit is single
The root of 2~6 times of the grid area of a first unit, the trapping pawl is connected with corresponding second unit.
10. cerebral thrombosis withdrawing device according to claim 9, which is characterized in that under loading condition, the trapping pawl is in
In the second unit connected；
The root of the trapping pawl is located at the proximal end position in the second unit of place, and the tip of the trapping pawl extends to place the
Distal site in Unit two.
11. cerebral thrombosis withdrawing device according to claim 1, which is characterized in that the partly or entirely point of trapping pawl
Position is provided with development point.
12. cerebral thrombosis withdrawing device according to claim 11, which is characterized in that under release conditions, be located at each trapping pawl
On all development points along tubular structure axis arrange, formed development mark axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821718864.7U CN209203427U (en) | 2018-10-23 | 2018-10-23 | Cerebral thrombosis withdrawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821718864.7U CN209203427U (en) | 2018-10-23 | 2018-10-23 | Cerebral thrombosis withdrawing device |
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| CN209203427U true CN209203427U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821718864.7U Active CN209203427U (en) | 2018-10-23 | 2018-10-23 | Cerebral thrombosis withdrawing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020083302A1 (en) * | 2018-10-23 | 2020-04-30 | 杭州亿科医疗器械有限公司 | Cranial thrombus removal apparatus |
| CN114451959A (en) * | 2022-01-12 | 2022-05-10 | 北京泰杰伟业科技有限公司 | Thrombus catching device |
-
2018
- 2018-10-23 CN CN201821718864.7U patent/CN209203427U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020083302A1 (en) * | 2018-10-23 | 2020-04-30 | 杭州亿科医疗器械有限公司 | Cranial thrombus removal apparatus |
| CN114451959A (en) * | 2022-01-12 | 2022-05-10 | 北京泰杰伟业科技有限公司 | Thrombus catching device |
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Effective date of registration: 20200918 Address after: Room c2-503, building C, No. 459, Qianmo Road, Xixing street, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Yike Medical Technology Co., Ltd Address before: 310051 Room 503, C2 Block 459 Yanmai Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU YIKE MEDICAL DEVICES Co.,Ltd. |