CN109771089A - Filter - Google Patents
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- CN109771089A CN109771089A CN201811574831.4A CN201811574831A CN109771089A CN 109771089 A CN109771089 A CN 109771089A CN 201811574831 A CN201811574831 A CN 201811574831A CN 109771089 A CN109771089 A CN 109771089A
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- connecting rod
- strainer
- filter
- strut
- support rod
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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, the link assembly includes the first connecting rod and second connecting rod connected in a detachable fashion, first strainer is fixed on the first connecting rod and extends towards the direction radiation far from the first connecting rod, and second strainer is fixed on second strut and extends towards the direction radiation far from the second connecting rod.Beneficial effects of the present invention: in summary, implement filter of the invention, have the advantages that the first connecting rod due to the application and the separable connection of second connecting rod, then the first strainer and the second strainer can be split into two independent filter screen units, section can recycled the first strainer and the second strainer respectively in different times.
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.
After filter is implanted a period of time, although the filter has intercepted a large amount of thrombus, still have in its inferior caval vein
Largely free thrombus, the filter that this can have been intercepted to a large amount of thrombus at this time takes out, then is implanted into a new filter, otherwise can
Lead to inferior vena.Since the price of filter is higher, this mode for being implanted into a new filter again will increase the warp of patient
Ji burden.
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, the link assembly includes the first connecting rod and second connecting rod connected in a detachable fashion,
First strainer is fixed on the first connecting rod and extends towards the direction radiation far from the first connecting rod, described second
Strainer is fixed on second strut and extends towards the direction radiation far from 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 filter further includes two and is respectively provided at the first connecting rod and described second
Recovering hook on connecting rod.
In filter of the present invention, first strainer includes multiple supports being used to support on wall in the blood vessels
Bar, second strainer include the first strut, and first strut is connect in a detachable fashion with the support rod.
In filter of the present invention, the support rod is fixed on the first connecting rod and respectively towards far from described
The direction of first connecting rod, 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 first connecting rod, 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 second connecting rod and respectively towards far from the second connecting rod
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 second connecting rod, the other end of second strut extends towards the direction radiation far from the second connecting rod, 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, the first connecting rod due to the application and second are had the advantages that
First strainer and the second strainer can then be split into two independent filter screen units by the separable connection of connecting rod, can be in difference
Period the first strainer and the second strainer are recycled respectively.
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 the schematic diagram when first connecting rod of filter shown in Fig. 2 is separated with second connecting rod；
Fig. 4 is the schematic diagram of the first structure of the locking mechanism of filter shown in Fig. 2；
Fig. 5 is the schematic diagram of second of structure of the locking mechanism of filter shown in Fig. 2；
Fig. 6 is the schematic diagram when filter that second embodiment of the invention provides is returned to predetermined form；
Fig. 7 is the schematic diagram when support rod of filter shown in Fig. 6 is separated with the first branch；
Fig. 8 is the support rod of filter and the first detachably connectable schematic diagram of the first branch shown in Fig. 6；
Fig. 9 is the support rod of filter and second of detachably connectable schematic diagram of the first branch shown in Fig. 6；
Figure 10 is that the connecting rod of the first strainer of filter shown in Fig. 6 is the schematic diagram of Y shape bar；
Figure 11 is that the second strainer of filter shown in Fig. 6 includes the schematic diagram of the second strut；
Figure 12 is the schematic diagram when support rod for the filter that third embodiment of the invention provides is connect with the first strut.
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 filter) is upon discharge proximal end away from the close one end of heart, away from
The remote one end of heart is distal end.
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
The filter 100 of first embodiment is returned to schematic diagram when predetermined form.
Fig. 2 and Fig. 3 are please referred to, filter 100 includes that link assembly 3 and two axially spaced-aparts along link assembly 3 are arranged
The first strainer 1 and the second strainer 2.Link assembly 3 includes the first connecting rod 31 and second connecting rod connected in a detachable fashion
32, the first strainer 31 is fixed on first connecting rod 31 and extends towards the direction radiation far from first connecting rod 31, the second strainer 2
It is fixed on second connecting rod 32 and extends towards the direction radiation far from second connecting rod 32.
When recycling filter 100, first connecting rod 31 can be made to relatively move with second connecting rod 32 by external force, until first
Connecting rod 31 is separated with second connecting rod 32.It, then can be by the first strainer 1 due to first connecting rod 31 and the separable connection of second connecting rod 32
Split into two independent filter screen units with the second strainer 2, can in different times section by the first strainer 1 and the second strainer 2
It is recycled respectively.For example, after filter 100 is implanted into a period of time, if the first strainer 1 has intercepted a large amount of thrombus, and second
Thrombus amount on strainer 2 is few, can first take out the first strainer 1 of fully loaded thrombus, intercept largely at this time to the second strainer 2
After thrombus, then the second strainer 2 taken out, without being implanted into a new filter again, alleviates the financial burden of patient.
Fig. 2 and Fig. 3 are please referred to, the first strainer 1 includes multiple support rods 11, Yi Jiduo for abutting against with blood vessel
A connecting rod 12 between support rod 11 and first connecting rod 31, multiple connecting rods 12 are set around the circumferentially-spaced of first connecting rod 31
It sets.One end of connecting rod 12 is fixed on first connecting rod 31, the other end of connecting rod 12 towards the direction far from first connecting rod 31 and
It radiates and extends towards the direction close to the second strainer 2, support rod 11 is connected to the other end of connecting rod 12, and connecting rod 12 can be to support
Bar 11 carries out Auxiliary support, is bonded support rod 11 tightly with blood vessel.In the present embodiment, support rod 11 and connecting rod 12
Quantity it is identical, each connecting rod 12 is correspondingly connected with a support rod 12, circumferential direction of multiple support rods 12 around first connecting rod 31
Interval setting, and support rod 11 and connecting rod 12 are straight-bar, support rod 11 is approximately axially parallel with first connecting rod 31.
It is understood that the present embodiment does not limit the specific structure of support rod 11 or support rod 12, in other implementations
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
When for bent stick, the side which is directed away from the second strainer 2 extends and gradually reverse flip crimps, and makes support rod 11
Point is supported on blood vessel.It will also be appreciated that the present embodiment does not limit the specific structure of the first strainer 1, for example,
In other embodiments, the first strainer 1 can only include multiple support rods 11, and one end of support rod 11 is fixed on first connecting rod at this time
On 31, the other end of support rod 11 extends and towards the direction radiation far from first connecting rod 31 for abutting against with blood vessel.Also
It is understood that the present embodiment does not limit the extending direction of the first strainer 1, the first strainer 1 is filtered towards far from or close to second
The side of net 2 extends.
Second strainer 2 includes multiple the first circumferentially distributed struts 21 around second connecting rod 32, one end of the first strut 21
Be connected on second connecting rod 32, the other end of the first strut 21 extend towards the direction radiation far from second connecting rod 32 and for
Blood vessel abuts against.In the present embodiment, the first strut 21 extends towards the side far from the first strainer 1, but the present embodiment
The structure of first strut 21 is not defined, in other embodiments, the first strut 21 can also be towards close to the first filter
The side of net 1 extends or the first strut 21 extend towards the side close to the first strainer 1 after, gradually reverse flip.
Further, filter 100 includes the recovering hook 4 being connected on first connecting rod 31 and second connecting rod 32, recycling
The proximal end or distal end of first connecting rod 31 or second connecting rod 32 is optionally arranged in hook 4.In the present embodiment, on first connecting rod 31
Recovering hook 4 be located at one end far from the second strainer 2 of first connecting rod 31, the recovering hook 4 on second connecting rod 32 is located at second and connects
One end close to the first strainer 1 of bar 32.Filter 100 further includes the fixation anchor 5 being arranged on support rod 11, when filter 100 is planted
After entering, fixed anchor 5 is pierced into blood vessel, to the effect of fixed filter 100.
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. 4, 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 implementation shown in Fig. 5
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.
Fig. 6 and Fig. 7 are please referred to, second embodiment of the invention provides a kind of filter, big with the filter of first embodiment
Identical on body, filter 100 includes link assembly 3 and two the first strainers 1 and second being separately fixed on link assembly 3
Strainer 2, link assembly 3 include the first connecting rod 31 and second connecting rod 32 connected in a detachable fashion, and the first strainer 31 is fixed
It radiates on first connecting rod 31 and towards the direction far from first connecting rod 31 and extends, the second strainer 2 is fixed on second connecting rod 32
Upper and towards separate second connecting rod 32 direction radiation extends.
The place that second embodiment is different from the first embodiment is that the first strainer 1 includes multiple is used to support in blood vessel
Support rod 11 on inner wall, the second strainer 2 include the first strut 21, and the first strut 21 connects in a detachable fashion with support rod 11
It connects.Fig. 6 is schematic diagram of the filter 100 of second embodiment after discharging in delivery sheath, when being returned to predetermined form, is propped up at this time
Strut 11 is connected with the first strut 21, makes filter 100 under predetermined form in closed frame structure.
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.
Referring to Fig. 8, 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. 9, 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.When between support rod 11 and the first strut 21
After constraint release, make to relatively move between first connecting rod 31 and second connecting rod 32, thus by first connecting rod 31 and second connecting rod 32
Separation.
Referring to Fig. 6 and Fig. 7, the first strainer 1 further includes multiple between support rod 11 and first connecting rod 31
Connecting rod 12, 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
On 31, the other end of connecting rod 12 radiates extension towards the direction far from first connecting rod 31 and towards the direction close to the second strainer 2,
Support rod 11 is connected to the other end of connecting rod 12, and connecting rod 12 can carry out Auxiliary support to support rod 11, make support rod 11 with
Blood vessel is tightly bonded.In the present embodiment, support rod 11 is identical as the quantity of connecting rod 12, each connecting rod 12 is corresponding
Connect a support rod 12, multiple being provided at circumferentially spaced around first connecting rod 31 of support rod 12, and support rod 11 and connecting rod 12
It is straight-bar, support rod 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. 10, 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. 6 and Fig. 7, the second strainer 2 includes multiple the first circumferentially distributed struts around second connecting rod 32
21, one end of the first strut 21 is connected on second connecting rod 32, and the other end of the first strut 21 is towards the side far from second connecting rod 32
Extend to radiation and is connect in a detachable fashion with support rod 12.In the present embodiment, the first strut 21 is towards far from the first filter
The side of net 1 extends, but the present embodiment is not defined the structure of the first strut 21, in other embodiments, first
Strut 21 can also towards close to the first strainer 1 side extend or the first strut 21 towards close to the first strainer 1 side
After extension, 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, real shown in Figure 11
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.
Figure 12 is please referred to, third embodiment of the invention provides a kind of filter, generally with the filter of second embodiment
It is identical, the difference is that, detachably connectable mode is different between support rod 11 and the first strut 21.
Figure 12 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.
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, which is characterized in that the link assembly includes the first connecting rod and second connecting rod connected in a detachable fashion, institute
The first strainer is stated to be fixed on the first connecting rod and extend towards the direction radiation far from the first connecting rod, second filter
Net is fixed on second strut and extends towards the direction radiation far from the second connecting rod.
2. filter according to claim 1, 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.
3. filter according to claim 1, which is characterized in that the filter further includes two and is respectively provided at first company
Recovering hook on bar and the second connecting rod.
4. filter according to claim 1, which is characterized in that first strainer includes multiple is used to support in the blood vessels
Support rod on wall, second strainer include the first strut, and first strut and the support rod are in a detachable fashion
Connection.
5. filter according to claim 4, which is characterized in that the support rod is fixed on the first connecting rod and divides
It does not radiate and extends towards the direction far from the first connecting rod.
6. filter according to claim 4, which is characterized in that first strainer further includes multiple connecting rods, the company
One end of extension bar is fixed on the first connecting rod, and the other end of the connecting rod is connect with the support rod.
7. filter according to claim 4, 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 second connecting rod and respectively towards separate
The direction of the second connecting rod, which radiates, to be extended.
8. filter according to claim 4, which is characterized in that second strainer further includes the second strut, and described second
One end of strut is fixed on the second connecting rod, and the other end of second strut is towards the direction spoke far from the second connecting rod
It penetrates and extends and be used to support blood vessel.
9. filter according to claim 4, 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 |
|---|---|---|---|
| CN201811574831.4A CN109771089B (en) | 2018-12-21 | 2018-12-21 | Filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020258943A1 (en) * | 2019-06-28 | 2020-12-30 | 上海微创心脉医疗科技股份有限公司 | Filter recovering and protecting device, filter recovering system and method and filtering system |
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| WO2020258943A1 (en) * | 2019-06-28 | 2020-12-30 | 上海微创心脉医疗科技股份有限公司 | Filter recovering and protecting device, filter recovering system and method and filtering system |
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| CN109771089B (en) | 2021-11-16 |
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