CN109771088A - Filter - Google Patents
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- CN109771088A CN109771088A CN201811573377.0A CN201811573377A CN109771088A CN 109771088 A CN109771088 A CN 109771088A CN 201811573377 A CN201811573377 A CN 201811573377A CN 109771088 A CN109771088 A CN 109771088A
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- Prior art keywords
- connecting rod
- strainer
- filter
- strut
- link assembly
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Abstract
The invention discloses a kind of filters, including link assembly, and the first strainer and the second strainer that two axially spaced-aparts along the link assembly are arranged, first strainer and the second strainer, which are fixed on the link assembly and respectively towards the direction radiation far from the link assembly, to be extended, first strainer includes multiple support rods being used to support on wall in the blood vessels, second strainer includes the first strut, and first strut is connect in a detachable fashion with the support rod.Beneficial effects of the present invention: the stability of filter when in use not only can be improved by connecting the first strut in a detachable fashion with support rod in the application, also extends the recovery time window of filter, effectively meets clinical demand.
Description
Technical field
The present invention relates to interventional medical device technical field more particularly to a kind of filters.
Background technique
What this part provided is only background information relevant to the disclosure, is not necessarily the prior art.
Pulmonary embolism (PE) is a kind of common disease, and case fatality rate is high, and the various emboluses of body circulation fall off and can cause pulmonary embolism.
Vena cava filter (hereinafter referred to as filter) is clinically proved to be prevention pulmonary embolism, and safely and effectively means, filter are presented to
In inferior caval vein, filtering is realized to the thrombus to fall off in inferior caval vein, prevents the thrombus to fall off from reaching lung along blood flow, is reduced
The incidence of pulmonary embolism.
Currently, filter in the market is mainly permanent filter and provisional filter.Wherein, permanent filter is once making
With patient must take medicine all the life, and filter is chronically implanted in vivo, and filter is deformed, tilts, shifts, is broken, or even is penetrated
The danger etc. of blood vessel.Therefore, it is clinically recommended to use provisional filter, is placed in the acute stage that patient's deep vein thrombosis occurs,
After acute stage, the risk of thrombus breaks loose again takes out filter when reducing.
Provisional filter is broadly divided into the open filter of single umbrella and closed-frame filter, wherein single open filter of umbrella
Including more support rods, one end of more support rods is open end, the other end is gathered together to form closed end, the branch of open end
Strut and contacts blood play the role of fixed filter.Due to open end support rod as be embedded to vascular wall nail, even if
Support rod climbs attached, package by endothelial cell, at any time as needed can also easily extract support rod by external force, therefore, single umbrella is opened
The recyclable phase for putting formula filter is longer.But since one end of the open filter of single umbrella is open architecture, the support rod of open end
Weaker to the support degree of blood vessel, filter is easy tilt, shift, even results in vascular wall perforation under the influence of blood flow and external force
Etc. complication.Closed-frame filter includes more support rods, and the both ends of more support rods are gathered together to form closing respectively
End, support rod and contacts blood, play the role of fixed filter, the stability of closed-frame filter is preferable, it is not easy to tilt,
Displacement, but it is closed at both ends due to the filter, it covers, wrap up if filter support rod is climbed by endothelial cell, will lead to the filter of implantation
It is difficult to take out, therefore, in order to avoid its support rod is climbed by endothelial cell attached, the recovery time window of closed-frame filter is shorter.
Therefore, how to extend the recovery time window of filter, while ensuring that the stability of filter in vivo is one and urgently solves
Problem certainly.
Summary of the invention
The purpose of the present invention is at least solving one of above-mentioned problems of the prior art, which is by following skill
What art scheme was realized:
The present invention provides a kind of filter, including link assembly and two axially spaced-aparts along the link assembly are arranged
The first strainer and the second strainer, first strainer is fixed on the link assembly with the second strainer and respectively towards separate
The direction of the link assembly, which radiates, to be extended, and first strainer includes multiple support rods, and second strainer includes first
Bar, first strut are connect in a detachable fashion with the support rod.
In filter of the present invention, the support rod is connect with first strut by degradable connector.
In filter of the present invention, the link assembly includes the first connecting rod and second connecting rod of slidable connection,
First strainer is fixed on the first connecting rod, and second strainer is fixed on the second connecting rod.
In filter of the present invention, it is provided with locking mechanism between the first connecting rod and the second connecting rod, when
When the locking mechanism unlocks, the first connecting rod and the second connecting rod can opposite slidings.
In filter of the present invention, the support rod is fixed on the link assembly and towards far from the connecting rod
The direction of component, which radiates, to be extended.
In filter of the present invention, first strainer further includes multiple connecting rods, and one end of the connecting rod is solid
It is scheduled on the link assembly, the other end of the connecting rod is connect with the support rod.
In filter of the present invention, the quantity of first strut be it is multiple, multiple first struts are around described
Link assembly it is circumferentially distributed, first strut is fixed on the link assembly and respectively towards far from the link assembly
Direction radiate extend.
In filter of the present invention, second strainer further includes the second strut, and one end of second strut is solid
It is scheduled on the link assembly, the other end of second strut extends towards the direction radiation far from the link assembly, is used in combination
In support blood vessels inner wall.
In filter of the present invention, the side bending of one end towards the vertical central axis of filter of the support rod extends
Form lower trisection.
In filter of the present invention, the distance at the lower trisection both ends is 5mm~20mm, the lower trisection both ends
The angle of the vertical central axis of line and filter is 20 °~60 °.
In conclusion implementing filter of the invention, have the advantages that the application by making the first strut and support
Bar connects in a detachable fashion, when filter when in use, support rod is connected with the first strut, and support rod is auxiliary the first strut
Helping under support can tightly be bonded with blood vessel, to improve the stability of filter entirety, avoid filter in factors such as blood flows
Under the influence of inclination, displacement；When needing to recycle filter, release the connection between support rod and the first strut, support rod and
After the separation of one strut, support rod and the first strut can easily be pulled out such as the nail for being embedded to blood vessel, extend filter
The recovery time window of device, effectively meets clinical demand.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the filter that provides of first embodiment of the invention schematic diagram when in a compressed state；
Fig. 2 is schematic diagram when filter shown in Fig. 1 is returned to predetermined form；
Fig. 3 is that the link assembly of filter shown in Fig. 2 includes the first connecting rod being slidably connected and the schematic diagram of second connecting rod；
Fig. 4 is the schematic diagram when support rod of filter shown in Fig. 3 is separated with the first strut；
Fig. 5 is the support rod of filter and the first detachably connectable schematic diagram of the first branch shown in Fig. 3；
Fig. 6 is the support rod of filter and second of detachably connectable schematic diagram of the first branch shown in Fig. 3；
Fig. 7 is the schematic diagram of the first structure of the connecting rod of the first strainer of filter shown in Fig. 3；
Fig. 8 is the schematic diagram of second of structure of the connecting rod of the first strainer of filter shown in Fig. 3；
Fig. 9 is the schematic diagram of the second strainer of filter shown in Fig. 3；
Figure 10 is that the second strainer of filter shown in Fig. 3 includes the schematic diagram of the second strut；
Figure 11 is the schematic diagram of the first structure of the locking mechanism of filter shown in Fig. 3；
Figure 12 is the schematic diagram of second of structure of the locking mechanism of filter shown in Fig. 3；
Figure 13 is the schematic diagram when support rod for the filter that second embodiment of the invention provides is connect with the first strut；
Figure 14 is the schematic diagram for the filter that third embodiment of the invention provides；
Figure 15 is the schematic diagram of the first structure of the locking mechanism of filter shown in Figure 14；
Figure 16 is the schematic diagram of second of structure of the locking mechanism of filter shown in Figure 14.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level
", "left", "right" and similar statement for illustrative purposes only, be not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
In intervention medical field, usually defining implantation material (such as intraluminal stent), one end close away from heart is close upon discharge
End is distal end away from the remote one end of heart.
First embodiment:
Fig. 1 and Fig. 2 are please referred to, first embodiment of the invention provides a kind of filter 100, and superelastic shape note can be used
Recall alloy material to be made, such as nickel-titanium alloy material, be contained in filter 100 in delivery sheath with compressive state, from
Predetermined form can be automatically reverted to after discharging in delivery sheath.Fig. 1 is the schematic diagram when in a compressed state of filter 100, and Fig. 2 is
Filter 100 is returned to schematic diagram when predetermined form, and filter 100 is in closed frame structure under predetermined form.
Referring to Fig. 2, filter 100 includes link assembly 3 and two arrange along the axially spaced-apart of link assembly 3 the
One strainer 1 and the second strainer 2, the first strainer 1 and the second strainer 2 are fixed on link assembly 3 and respectively towards far from link assemblies
3 direction, which radiates, to be extended.First strainer 1 includes multiple support rods 11 being used to support on wall in the blood vessels, and the second strainer 2 includes
First strut 21, the first strut 21 are connect in a detachable fashion with support rod 11.When filter 100 is in predetermined form, branch
Strut 11 is connected with the first strut 21.
When filter 100 when in use, filter 100 is in predetermined form, and support rod 11 is connected with the first strut 21 at this time, branch
Strut 11 can be tightly bonded under the Auxiliary support of the first strut 21 with blood vessel, so that the stability of filter entirety is improved,
Filter 100 is avoided to tilt, shift under the influence of the factors such as blood flow.When needing to recycle filter 100, make support rod 11 and first
Connection between strut 21 releases, and after support rod 11 is separated with the first strut 21, support rod 11 is with the first strut 21 as buried
Enter the nail of blood vessel, can easily be pulled out.Therefore the application is by making the first strut 21 with support rod 11 with separable
Mode connects, and filter 100 can not only be made to have preferable stability when in use, but also convenient for recycling, extends returning for filter
Time window is received, clinical demand is effectively met.
Further, filter 100 further includes recovering hook 4, and the close of link assembly 3 is optionally arranged in recovering hook 4
One end of first strainer 1, or close to one end of the second strainer 2.In the present embodiment, leaning on for link assembly 3 is arranged in recovering hook 4
One end of nearly first strainer 1.Filter 100 further includes the fixation anchor 5 being arranged on support rod 11, fixed after filter 100 is implanted into
Anchor 5 is pierced into blood vessel, to the effect of fixed filter 100.
Fig. 3 and Fig. 4 are please referred to, link assembly 3 includes the first connecting rod 31 and second connecting rod 32 of slidable connection, the first filter
Net 1 is connected on first connecting rod 31, and the second strainer 2 is connected on second connecting rod 32.When recycling filter 100, it can be made by external force
First connecting rod 31 is relatively moved with second connecting rod 32, to make the first strainer 1 relatively move with the second strainer 2, directly
To the first strainer 1 support rod 11 and the second strainer 2 the first strut 21 between connection release.
Referring to Fig. 5, the sliding slot 110 for extending to the end of supporting element 11 is provided on support rod 11, the first strut 21
End is provided with sliding part 210, and 210 slidable connection of sliding part is in sliding slot 110.When filter is in predetermined form, sliding
Part 210 is located in sliding slot 110.When recycling filter, sliding part 210 moves in sliding slot 110, until sliding part 210 is from support
The end of bar 11 is detached from, and the connection between support rod 11 and the first strut 21 is released.
It should be noted that, although the present embodiment be by relatively moving first connecting rod 31 and second connecting rod 32,
To release the connection between support rod 11 and the first strut 21, but the application does not limit support rod 11 and the first strut
21 release the concrete mode of connection.For example, in the embodiment shown in fig. 6, support rod 11 passes through degradable with the first strut 21
Connector 6 connects, and the degradation cycle of the degradable connector 6 is roughly the same with the time window that filter 100 implants, that is,
Say, when filter 100 reaches take-off time, the degradable connector 6 is degradable or mechanical property of its material
Through losing, to make the constraint release between support rod 11 and the first strut 21, at this time first connecting rod 31 and second connecting rod 32 it
Between can not relatively move.
Referring to Fig. 7, the first strainer 1 further includes multiple connecting rods 12 between support rod 11 and first connecting rod 31,
Multiple being provided at circumferentially spaced around first connecting rod 31 of connecting rod 12.One end of connecting rod 12 is fixed on first connecting rod 31, connection
The other end of bar 12 radiates extension towards the direction far from first connecting rod 31 and towards the direction close to the second strainer 2, and support rod 11 connects
The other end in connecting rod 12 is connect, connecting rod 12 can carry out Auxiliary support to support rod 11, keep support rod 11 and blood vessel tight
It is close to close.In the present embodiment, support rod 11 is identical as the quantity of connecting rod 12, each connecting rod 12 is correspondingly connected with a branch
Strut 12, multiple being provided at circumferentially spaced around first connecting rod 31 of support rod 12, and support rod 11 and connecting rod 12 are straight-bar, branch
Strut 11 is approximately axially parallel with first connecting rod 31.
It is understood that the present embodiment does not limit the specific structure of the first strainer 1, in other embodiments, first
Strainer 1 can only include multiple support rods 11, and one end of support rod 11 is fixed on first connecting rod 31 at this time, support rod 11 it is another
One end extends and towards the direction radiation far from first connecting rod 31 for abutting against with blood vessel.Alternatively, in other embodiments
In, connecting rod 12 is other shapes of support rod, for example, in the embodiment shown in fig. 8, connecting rod 12 is Y shape bar, the Y shape
Bar includes main branch section 12a, and the other end of two the son fields 12b, main branch section 12a separated by one end of main branch section 12a connects
It connects on first connecting rod 31, each son field 12b is connect with a support rod 11.Alternatively, in other embodiments, the first strainer
1 further includes the other rod-shaped or reticular structure between support rod 11 and first connecting rod 31, as long as other rod-shaped or netted knot
Structure is not contacted with blood vessel, it is ensured that only has support rod 11 to contact with blood vessel on the first strainer 1, at this time the first strainer
1 nail as being embedded to blood vessel can be easily pulled out.
It will also be appreciated that the present embodiment does not limit the specific structure of support rod 11 or support rod 12, in other realities
It applies in example, support rod 11 or support rod 12 can also be the compound rod of bent stick or bent stick and straight-bar.For example, working as support rod
11 be bent stick when, the support rod 11 be directed away from the second strainer 2 side extend and gradually reverse flip crimp, make support rod
11 points are supported on blood vessel.It will also be appreciated that the present embodiment does not limit the extending direction of the first strainer 1, first
Strainer 1 extends towards the side far from or close to the second strainer 2.
Referring to Fig. 9, the second strainer 2 include multiple the first circumferentially distributed struts 21 around second connecting rod 32, first
One end of bar 21 is connected on second connecting rod 32, and the other end of the first strut 21 prolongs towards the direction radiation far from second connecting rod 32
It stretches and is connect in a detachable fashion with support rod 12.In the present embodiment, the first strut 21 towards far from the first strainer 1 one
Side extends, but the present embodiment is not defined the structure of the first strut 21, and in other embodiments, the first strut 21 is also
After can extending towards the side close to the extension of the side of the first strainer 1 or the first strut 21 towards close first strainer 1,
Gradually reverse flip.
It is to be appreciated that above-mentioned multiple first struts 21 can all connect in a detachable fashion with multiple support rods 12
It connects, is also possible to part support rod 12 and is connected in a detachable fashion with corresponding first strut 21.When multiple first struts 21
When all connecting in a detachable fashion with multiple support rods 12, the quantity of the first strut 21 is identical as the quantity of support rod 12,
Each first strut 21 forms each support rod 12 support respectively, so that each support rod 12 is born against on vascular wall, to have
Effect improves the overall radial intensity of filter, and the stability of filter 100 is made to be further enhanced, and avoids the occurrence of filter inclination, moves
The complication such as position improve the safety that patient uses.
It is understood that the present embodiment does not limit the specific structure of the second strainer 2, for example, in reality shown in Fig. 10
It applies in example, the second strainer 2 further includes multiple the second circumferentially distributed struts 22 around second connecting rod 32, one end of the second strut 22
It is fixed on second connecting rod 32, the other end of the second strut 22 extends and towards the direction radiation far from second connecting rod 32 for branch
Support blood vessel.Structure is complicated due to endovascular, and the present embodiment is by the second strut 22 with support rod 11 respectively to intravascular
Wall is supported, and can be supported fixation in the Different Plane of blood vessel to filter 100, be waited until the stability of filter 100
It further enhances, guarantees the safety used.In order to avoid the second strut 22 punctures blood vessel, the second strut 22 and blood vessel
The part of contact is segmental arc, the segmental arc and blood vessel point contact.Alternatively, in other embodiments, the second strainer 2 may be used also
To include the other rod-shaped or reticular structure between the first strut 21 and second connecting rod 32, as long as other rod-shaped or netted knot
Structure is not contacted with blood vessel.
In order to increase the safety coefficient of clinical use, after avoiding 100 implantable intravascular of filter, first connecting rod 31 and second connecting rod
32 arbitrarily relatively move under the action of the radial pressure of the impact of blood flow or blood vessel, the first connecting rod 31 of the application
Locking mechanism 33 is provided between second connecting rod 32.When locking mechanism 33 is in the lock state, first connecting rod 31 and second
It can not be relatively moved between connecting rod 32；When locking mechanism 33 unlocks, the first connecting rod 31 can be slided relatively with second connecting rod 32
It is dynamic.
In the embodiment shown in fig. 11, be provided in first connecting rod 31 axially through sliding groove 311, second connecting rod
32 one end is slidably connected in the sliding groove 311.
Locking mechanism 33 includes the limiting slot 331 on multiple inner walls for being axially arranged on sliding groove 311, and setting the
The end of two connecting rods 32 or the locating part 332 on outer wall, under the effect of external force, locating part 332 can be sliding from a limiting slot 331
It moves to another limiting slot 331.Specifically, locating part 332 is fabricated from a flexible material, stress elastically deformable.Limiting slot
The side wall surface of 331 separate recovering hook 4 is inclined surface, the side wall surface substantially vertical plane of the close recovering hook 4 of limiting slot 331.
The side wall surface of the separate recovering hook 4 of locating part 332 is also inclined surface, and the inclined surface on locating part 332 and limiting slot 331 tilt
The tilt angle in face is roughly the same, the side wall surface of the close recovering hook 4 of locating part 332 also substantially vertical plane.Due to limiting slot
331 and the side wall surface of separate the recovering hook 4 of locating part 332 are inclined surface, which, which cooperates, can play driving effect,
Locating part 332 is facilitated to slide into another limiting slot 331 from a limiting slot 331.Also, due to limiting slot 331 and limit
The side wall surface of the close recovering hook 4 of part 332 is vertical plane, and two vertical plane cooperations can play stopping function, make locating part 332
It can not be mobile towards the side of recovering hook 4.Therefore the locking mechanism 33 of the present embodiment can guarantee first connecting rod 31 and second connecting rod 32
Having could relatively move under biggish external force, and first connecting rod 31 is only capable of moving in one direction, ensure that filter 100
Stability in the blood vessels.In order to avoid locating part 332 slides from the end of sliding groove 311, lead to first connecting rod 31 and second
Connecting rod 32 separates, and limiting slot 331 is located at the position other than the end of sliding groove 311 in the present embodiment.
It should be noted that the present embodiment does not limit the specific structure of locking mechanism 33, as long as being avoided that first connecting rod
31 arbitrarily relatively move with second connecting rod 32.For example, being provided in first connecting rod 31 in the implementation shown in Figure 12
Axially through sliding groove 311, one end of second connecting rod 32 is slidably connected in the sliding groove 311.
Locking mechanism 33 includes the fixing groove 333 for being arranged on the outer wall of first connecting rod 31, being conducted with sliding groove 311,
And fixing piece 334 of the projection on the outer wall of second connecting rod 32, fixing piece 334 are slidably connected in fixing groove 333.Tool
Body, fixing groove 333 includes sequentially connected fixed section 3331, linkage section 3332 and glissile segment 3333.Glissile segment 3333 is along
One connecting rod 31 it is axially extending, one end of linkage section 3332 is connected to one end of the close recovering hook 4 of glissile segment 3333 and along
The circumferentially extending of one connecting rod 31.Fixed section 3331 is connected to the other end of linkage section 3332 and along the axial direction of first connecting rod 31
Extend towards the side far from recovering hook 4.When filter is in predetermined form, fixing piece 334 is located in fixed section 3331；Work as recycling
When filter, fixing piece 334 can be made to be moved in linkage section 3332 from fixed section 3331 by external force, be rotated further by second connecting rod 32,
It is moved to fixing piece 334 in glissile segment 3333 from linkage section 3332, to make first connecting rod 31 that phase occur with second connecting rod 32
To movement.
In order to increase the stability that fixing piece 334 slides in fixing groove 333, fixed section 3331, linkage section 3332 and cunning
The width of dynamic section 3333 is identical as the outer diameter of fixing piece 334.In order to reduce the action time of external force, operator is facilitated as early as possible will
Fixing piece 334 is moved in glissile segment 3333 from fixed section 3331, and the length of fixed section 3331 is less than the length of glissile segment 3333.
In order to avoid first connecting rod 31 is separated with second connecting rod 32, in the present embodiment fixing groove 333 be located at the end of first connecting rod 31 with
Outer position.
Figure 13 is please referred to, second embodiment of the invention provides a kind of filter, generally with the filter of first embodiment
It is identical, the difference is that, detachably connectable mode is different between support rod 11 and the first strut 21.
Figure 13 is please referred to, the end of the first strut 21 is provided with connection ring 211, and support rod 11 covers in a movable manner
In connection ring 211.When filter is in predetermined form, support rod 11 is worn from connection ring 211.When recycling filter, support rod
11 relatively move with connection ring 211, until support rod 11 is detached from from connection ring 211, thus by support rod 11 and first
Connection between strut 21 releases.
The side bending of one end of the separate recovering hook 4 of support rod 11 towards the vertical central axis of filter extends to form lower folding
Section 111.Lower trisection 111 can bar 11 easy to support be detached from from connection ring 211 in recycling, and lower trisection 111 also can avoid
Stab blood vessel in the end of support rod 11.
If the distance at lower 111 both ends of trisection is excessive, when recycling filter, support rod 11 is not easy from connection ring 211
It is detached from；If the distance at lower 111 both ends of trisection is too small, when in use, support rod 11 is easy to fall off from connection ring 211 filter,
Influence supporting role of first strut 21 to support rod 11.If also, the line at 111 both ends of lower trisection and the longitudinal center of filter
The angle of axis is excessive, and the bending place of lower trisection 111 is easy to stab vascular wall；If the line at lower 111 both ends of trisection and filter 100
The angle of vertical central axis is smaller, then the effect that lower trisection 111 is arranged is not significant.Therefore in the present embodiment, 111 liang of lower trisection
The distance at end is 5mm~20mm, and the angle of the vertical central axis of the line and filter at lower 111 both ends of trisection is 20 °~60 °.This
The vertical central axis of the line and filter at 111 both ends of distance and lower trisection at 111 both ends of trisection under application passes through while adjusting
Angle can be detached from from connection ring 211 with bar 11 easy to support in recycling, and it is intravascular to avoid the end of support rod 11 from stabbing
Wall.
Further, the end of the separate recovering hook 4 of support rod 11 is equipped with the round and smooth spherical portion 112 of outer profile, to avoid
Stab blood vessel in the end of support rod 11.
When 11 sets of support rod in connection ring 211, i.e., when the first strut 21 is connected with support rod 11, the first strut 21
End far from second connecting rod 32 is inserted into blood vessel, to improve the whole stability of filter 100.Specifically, working as filter
100 when being in predetermined form, and support rod 11 is crossed in the end of the separate second connecting rod 32 of the first strut 21, and the first strut 21
End and support rod 11 far from second connecting rod 32 are not more than 5mm along the radial difference in height of filter, to avoid the first strut 21
Puncture vascular wall.
Figure 14 is please referred to, third embodiment of the invention provides a kind of filter, generally with the filter of first embodiment
Identical, filter 100 includes link assembly 3, and the first strainer 1 and the second strainer 2 that are separately fixed on link assembly 3, the
One strainer 1 include multiple support rods 11 being used to support on wall in the blood vessels, the second strainer 2 include the first strut 21, first
Bar 21 is connect in a detachable fashion with support rod 11.When filter 100 is in predetermined form, support rod 11 and the first strut 21
It is connected.
3rd embodiment and first embodiment the difference is that, link assembly 3 include connect in a detachable fashion
First connecting rod 31 and second connecting rod 32, the first strainer 1 is fixed on first connecting rod 31 and towards the direction far from first connecting rod 31
Radiation extends, and the second strainer 2 is fixed on second connecting rod 32 and extends towards the direction radiation far from second connecting rod 32.
Due to first connecting rod 31 and the separable connection of second connecting rod 32, then the first strainer 1 and the second strainer 2 can be split
At two independent filter screen units, the first strainer 1 and the second strainer 2 can be recycled section respectively in different times.Example
Such as, after filter 100 is implanted into a period of time, the first strainer 1 has intercepted a large amount of thrombus, and the thrombus amount on the second strainer 2 is not
It is more, first the first strainer 1 of fully loaded thrombus can be taken out at this time, filtered after the second strainer 2 has intercepted a large amount of thrombus, then by second
Net 2 takes out.
It please participate in Figure 14, be connected separately with recovering hook 4 on first connecting rod 31 and second connecting rod 32, on first connecting rod 31
Recovering hook 4 is located at one end far from the second strainer 2 of first connecting rod 31, and the recovering hook 4 on second connecting rod 32 is located at second connecting rod
32 one end close to the first strainer 1.
In order to increase the safety coefficient of clinical use, after avoiding 100 implantable intravascular of filter, first connecting rod 31 and second connecting rod
32 arbitrarily relatively move under the action of the radial pressure of the impact of blood flow or blood vessel, the first connecting rod 31 of the application
Locking mechanism 33 is provided between second connecting rod 32.When locking mechanism 33 is in the lock state, first connecting rod 31 and second
It can not be relatively moved between connecting rod 32；When locking mechanism 33 unlocks, the first connecting rod 31 can be slided relatively with second connecting rod 32
It is dynamic.
In the embodiment shown in fig. 15, be provided in first connecting rod 31 axially through sliding groove 311, second connecting rod
32 one end is slidably connected in the sliding groove 311.Locking mechanism 33 includes multiple sliding grooves 311 of being axially arranged on
Limiting slot 331 on inner wall, and the end of second connecting rod 32 or the locating part 332 on outer wall are set, multiple limiting slots 331 prolong
Extend to the end of sliding groove 311.Under the effect of external force, locating part 332 can slide into another limit from a limiting slot 331
In slot 331, until second connecting rod 32 and first connecting rod 31 are detached from.Specifically, locating part 332 is fabricated from a flexible material, stress
Elastically deformable.The side wall surface of the separate recovering hook 4 of limiting slot 331 is inclined surface, the side of the close recovering hook 4 of limiting slot 331
Wall surface substantially vertical plane.The side wall surface of the separate recovering hook 4 of locating part 332 is also inclined surface, and the inclination on locating part 332
Face is roughly the same with the tilt angle of 331 inclined surface of limiting slot, and the side wall surface of the close recovering hook 4 of locating part 332 is also substantially
Vertical plane.Since the side wall surface of limiting slot 331 and the separate recovering hook 4 of locating part 332 is inclined surface, which matches
Conjunction can play driving effect, and locating part 332 is facilitated to slide into another limiting slot 331 from a limiting slot 331.Also, by
It is vertical plane in the side wall surface of limiting slot 331 and the close recovering hook 4 of locating part 332, two vertical plane cooperations can be played only
Movement is used, and keeps locating part 332 mobile towards the side of recovering hook 4.Therefore the locking mechanism 33 of the present embodiment can guarantee that first connects
Bar 31 and second connecting rod 32 could only relatively move under biggish external force, and first connecting rod 31 is only capable of in one direction
It is mobile, it ensure that the stability of filter 100 in the blood vessels.
It should be noted that the present embodiment does not limit the specific structure of locking mechanism 33, as long as being avoided that first connecting rod
31 arbitrarily relatively move with second connecting rod 32.For example, being provided in first connecting rod 31 in the implementation shown in Figure 16
Axially through sliding groove 311, one end of second connecting rod 32 is slidably connected in the sliding groove 311.Locking mechanism 33
The fixing groove 333 being conducted on outer wall including first connecting rod 31 is arranged in, with sliding groove 311 and projection are in second connecting rod
Fixing piece 334 on 32 outer wall, fixing piece 334 are slidably connected in fixing groove 333, and fixing groove 333 extends to first
The end of connecting rod 31 enables fixing piece 334 to be detached from from fixing groove 333.Specifically, fixing groove 333 includes sequentially connected solid
Determine section 3331, linkage section 3332 and glissile segment 3333.Glissile segment 3333 is axially extended to the end of first connecting rod 31, linkage section
3332 one end is connected to one end of the close recovering hook 4 of glissile segment 3333 and along the circumferentially extending of first connecting rod 31.Fixed section
3331 are connected to the other end of linkage section 3332 and extend along the axial of first connecting rod 31 towards the side far from recovering hook 4.When
When filter is in predetermined form, fixing piece 334 is located in fixed section 3331.When recycling filter, fixing piece can be made by external force
334 are moved in linkage section 3332 from fixed section 3331, are rotated further by second connecting rod 32, move fixing piece 334 from linkage section 3332
It moves to glissile segment 3333.
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.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of filter, including the first strainer for arranging of link assembly and two axially spaced-aparts along the link assembly with
Second strainer, first strainer and the second strainer are fixed on the link assembly and respectively towards far from the link assemblies
Direction radiate extend, which is characterized in that first strainer includes multiple support rods, second strainer include first
Bar, first strut are connect in a detachable fashion with the support rod.
2. filter according to claim 1, which is characterized in that the support rod and first strut pass through degradable company
Fitting connection.
3. filter according to claim 1, which is characterized in that the link assembly includes the first connecting rod of slidable connection
With second connecting rod, first strainer is fixed on the first connecting rod, and second strainer is fixed on the second connecting rod.
4. filter according to claim 3, which is characterized in that be provided between the first connecting rod and the second connecting rod
Locking mechanism, when locking mechanism unlock, the first connecting rod and the second connecting rod can opposite slidings.
5. filter according to claim 1, which is characterized in that the support rod is fixed on the link assembly and court
Direction far from the link assembly, which radiates, to be extended.
6. filter according to claim 1, which is characterized in that first strainer further includes multiple connecting rods, the company
One end of extension bar is fixed on the link assembly, and the other end of the connecting rod is connect with the support rod.
7. filter according to claim 1, which is characterized in that the quantity of first strut be it is multiple, multiple described the
One strut is circumferentially distributed around the link assembly, and first strut is fixed on the link assembly and respectively towards separate
The direction of the link assembly, which radiates, to be extended.
8. filter according to claim 1, which is characterized in that second strainer further includes the second strut, and described second
One end of strut is fixed on the link assembly, and the other end of second strut is towards the direction spoke far from the link assembly
It penetrates and extends and be used to support blood vessel.
9. filter according to claim 1, which is characterized in that the vertical central axis of one end of the support rod towards filter
Side bending extends to form lower trisection.
10. filter according to claim 9, which is characterized in that the distance at the lower trisection both ends is 5mm~20mm, institute
The angle for stating the line at lower trisection both ends and the vertical central axis of filter is 20 °~60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573377.0A CN109771088B (en) | 2018-12-21 | 2018-12-21 | Filter device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811573377.0A CN109771088B (en) | 2018-12-21 | 2018-12-21 | Filter device |
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| Publication Number | Publication Date |
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| CN109771088A true CN109771088A (en) | 2019-05-21 |
| CN109771088B CN109771088B (en) | 2021-12-03 |
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|---|---|---|---|
| CN201811573377.0A Active CN109771088B (en) | 2018-12-21 | 2018-12-21 | Filter device |
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| CN109771088B (en) | 2021-12-03 |
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