CN109771092B - A kind of vena cave implantation thrombus filter - Google Patents
A kind of vena cave implantation thrombus filter Download PDFInfo
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- CN109771092B CN109771092B CN201910233547.9A CN201910233547A CN109771092B CN 109771092 B CN109771092 B CN 109771092B CN 201910233547 A CN201910233547 A CN 201910233547A CN 109771092 B CN109771092 B CN 109771092B
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Abstract
A kind of vena cave of disclosure of the invention is implanted into thrombus filter, support portion includes the first balancing pole and the second balancing pole, several first balancing poles are set to the head end of central axis and are uniformly distributed along the circumferential direction of central axis in umbrella-shaped structure, several second balancing poles are set to the tail end of central axis and are uniformly distributed along the circumferential direction of central axis in umbrella mechanism, and the first balancing pole and the second balancing pole are interspersed；Filter house includes filter bulb and filter plate；Direction is extended along on each first balancing pole to be uniformly distributed equipped with multiple filter bulbs；Several filter plates are set on central axis shaft part between the first balancing pole and the second balancing pole；When in use, the second balancing pole generates along central axis radially inward squeezing action filter plate to filter, and filter plate is in inside compressive state.The present invention is conducive to improve filter efficiency, increases the geometrical stability of filter, and filter is prevented to be displaced or tilt, and ensures filter along normal recycling.
Description
Technical field
Invention is related to the filter in a kind of implantable vessel, and in particular to a kind of vena cave is implanted into thrombus filter.
Background technique
Lower limb deep venous thrombosis (deep venous thrombosis, DVT) is clinical common disease, and is caused
Pulmonary embolism (pulmonary embolism, PE) most important reason.The pulmonary embolism death rate, disability rate are high.Inferior caval vein
The merging of filter (inferior vena cava filter, IVCF) can effectively prevent pulmonary embolism, substantially former
Reason is to capture big mortality embolus by being placed on the strainer at vena cave, it is avoided to enter pulmonary circulation.Venous filter
Using now more and more extensive.In order to improve the using effect of filter, the influence of complication is reduced, makes thromboembolism treatment more
Safety, people constantly propose new design scheme to filter, or existing filter is modified and improved.
Common umbrella filter leaves patient for and the enough time sufficiently eliminates blood its advantage is that can extend recovery time
Bolt.But its shortcomings that is unidirectionally to recycle, filter efficiency is poor；Property placed in the middle is poor, is easy to appear the recovering hook of filter
The phenomenon being attached on wall of vein, so as to cause filter, in recycling, surgical procedure is difficult or even irretrievable problem.
Summary of the invention
In view of the above technical problems, invention provides a kind of vena cave implantation thrombus filter to solve the above problems, benefit
In improving filter efficiency, increase the geometrical stability of filter, filter is prevented to be displaced or tilt, ensures that filter is returned along normal
It receives.
Invention is achieved through the following technical solutions:
A kind of vena cave implantation thrombus filter, including central axis, support portion and filter house, the support portion include several
First balancing pole and several second balancing poles, several first balancing poles are set to the head end of central axis and along the circumferential equal of central axis
Even distribution is in umbrella-shaped structure, and several second balancing poles are set to the tail end of central axis and are uniformly distributed along the circumferential direction of central axis in umbrella
Shape mechanism, on the axis projection direction along central axis, the first balancing pole and the second balancing pole are interspersed；First balancing pole and
The free end end of second balancing pole is contacted with blood vessel；
The filter house includes filter bulb and filter plate；Direction is extended along on each first balancing pole to be uniformly distributed equipped with multiple
Filter bulb, the filter bulb are the chondritic that elastic strands material is entwined, and filter bulb, which is equipped with, is used for what the first balancing pole passed through
Through-hole；Several filter plates are set on central axis shaft part between the first balancing pole and the second balancing pole, several filter plates are along center
Axis is circumferentially uniformly distributed, and a filter plate is correspondingly arranged immediately below each second balancing pole；When in use, second is flat for filter
The bar that weighs generates along central axis radially inward squeezing action filter plate, and filter plate is in inside compressive state.
The present invention is made of the main body framework structure of filter central axis and support portion, plays the role of supporting and fixing, branch
Support part is mainly made of two layers of umbrella-shaped structure, i.e., multiple first balancing poles are circumferentially arranged into first layer umbrella-shaped structure along central axis,
Multiple second balancing poles are circumferentially arranged into second layer umbrella-shaped structure along central axis, on the axis direction along blood vessel, increase
The stress point of filter and vascular wall, increase filter from center capacity, effectively prevent with standing time extend, body movement
Etc. the displacement of filter caused by factors, inclination the problems such as.Since the first balancing pole and the second balancing pole primarily serve fixed filtering
The effect in portion, therefore a small amount of balancing pole is only needed, and the first balancing pole and the second balancing pole is staggered, it is generally symmetrical
2~4 the first balancing poles, 2~4 second balancing poles are set, the fixed function to filter house is played and improve the steady of filter
While qualitative, mitigate filter overall weight.Filter includes multiple filter bulbs being arranged on the first balancing pole and with
The filter plate of two balancing poles contact, the filter bulb on the first balancing pole formed the first filter layer convection current filtered for the first time through blood and
Thrombus flow velocity is reduced, the filter plate on the second balancing pole forms the second filter layer convection current and carries out secondary filter through blood；Filter bulb is bullet
Property the chondritic that is entwined of filamentary material conducive to the contact area increased with blood improve filter efficiency；Filter plate is on the one hand
Can the biggish thrombus of effectively catching volume, on the other hand play a supporting role to the second balancing pole, this is because filter makes
Used time, the second balancing pole generate along central axis radially inward squeezing action filter plate, and filter plate is in inside compressive state, filter
The restoring force of plate itself can give the second balancing pole certain pretightning force, this pre- in filter run-off the straight tendency
Clamp force and the enough supporting roles of the second balancing pole are given with counterbalancing tiit active force, effectively maintain the stability of filter.
Further, the filter bulb on each first balancing pole includes major diameter filter bulb and minor diameter filter bulb, major diameter filter bulb
It is arranged alternately with minor diameter filter bulb, and the outer diameter of major diameter filter bulb is gradually reduced on the direction far from central axis；Minor diameter filter
The outer diameter of ball is less than the outer diameter of the smallest major diameter filter bulb.
By wearing the filter bulb of different-diameter size on each first balancing pole, on the one hand protected by the filter bulb of major diameter
Hinder the first umbrella-shaped structure circumferential direction effective filtration area that multiple first balancing poles are constituted, is on the other hand protected by the filter bulb of minor diameter
The proper flow for hindering blood prevents from extending thrombus blocking filter with standing time.And it is big on the direction far from central axis
The outer diameter of diameter filter bulb is gradually reduced, convenient when picking and placing filter, withdraws the second balancing pole.
Further, the filter bulb includes two positioning rings and the Elastic silk screen between two positioning rings, and two fixed
Position ring is the hollow structure of rigidity, and two positioning ring axial lines are overlapped two ports for being oppositely arranged the through-hole as filter bulb,
Elastic yarn structure is wound the Elastic silk screen of ball-type using both ends positioning ring as fixed base point.
Two positioning rings play fixed and styling to Elastic silk screen.
Further, first balancing pole is equipped with several annular grooves, the positioning ring and annular groove on filter bulb it is interior
Wall clearance fit, and the internal diameter of positioning ring is less than the outer diameter of the first balancing pole；Annular groove is big along the length of central axis axial direction
In the stretchable maximum length of Elastic silk screen.
By the way that multiple annular grooves are arranged on the first balancing pole, for installing filter bulb, filter bulb mainly passes through positioning ring and ring
The outer wall clearance fit of shape slot contacts, and reduces the resistance of filter bulb and annular groove outer wall, ensures the first of filter bulb opposed annular slot section
Balancing pole rotation connection；And annular groove is greater than the stretchable maximum length of Elastic silk screen along the length of central axis axial direction, prevents
Only multiple filter bulbs even fall off from the first balancing pole along the first balancing pole sliding aggregation；Annular groove is along central axis axial direction
Length is greater than the stretchable maximum length of Elastic silk screen, when filter bulb is squeezed, ensures that filter bulb is extending or compressive deformation.
Further, the filter plate is the elastic hollow out of tapered structure, and the maximum width of filter plate is greater than the second balance
The outer diameter of bar.
Filter plate uses the pyramidal structure of hollow out, can install on center shaft bigger diameter end, make multiple filter plates to the mistake of blood
Filter effect concentrates near central axis, ensures blood in the gap proper flow far from central axis.
Further, the central axis includes the first center-pole and the second center-pole, the first center-pole and the second center-pole
It is hollow tubular structure；The head end integration covering of first center-pole is equipped with the first cyclic annular substrate, and the first balancing pole is set to first
In plate face on cyclic annular substrate and towards the first center-pole head end；The first center of head end interference fit insertion of second center-pole
Fixed in the tail end of bar, the tail end of the second center-pole is arranged with the second cyclic annular substrate, and the outer diameter of the second cyclic annular substrate is greater than first
The inner diameter of centerpipe of center-pole, the second balancing pole are set on the second cyclic annular substrate and in the plate face of the second center-pole tail end of direction.
Filter overall structure of the present invention is constituted using prefabricated component assembling form, the first center-pole, the first cyclic annular substrate with
And multiple first balancing poles being fixed on the first cyclic annular substrate may make up the first prefabricated portion, the second center-pole, the second cyclic group
Plate and multiple second balancing poles being fixed on the second cyclic annular substrate may make up the second prefabricated portion, can be according to the actual need of patient
The matched first prefabricated portion of selection and the second prefabricated portion are asked, is embedded in the first center-pole by the second center-pole, then pass through bolt
Or the modes such as welding realize the connection in the first prefabricated portion Yu the second prefabricated portion.
Further, circumferentially distributed on the inner wall of the first center-pole tail end to have several locating grooves, each positioning
Card slot is axially extending along the first center-pole；It is circumferentially distributed on the outer wall of the second center-pole head end to have several convexes
It rises, positioning protrusion is adapted to locating groove.
When assembling central axis, first the positioning protrusion on the second center-pole is aligned with the locating groove on the first center-pole
Afterwards, the second center-pole is inserted into the hollow tube of the first center-pole, while positioning protrusion also can be along locating groove sliding motion.It is fixed
Linear type and shaped form, the axially extending direction of linear structure, that is, locating groove and first can be used in the structure type of position card slot
Center-pole is axially parallel, and shaped form structure, that is, locating groove is along the first circumferentially continuous helical arrangement of central axis inner wall.
Further, circumferentially distributed on the lateral wall of the described first cyclic annular substrate to have several recessing grooves, the recessing groove
For making way for the second balancing pole.
By the way that recessing groove is arranged on the first cyclic annular substrate, it is mainly used for needing to tighten first flat when picking and placing filter
Weigh bar and the second balancing pole, and the filter outer diameter after ensureing tightening is smaller.
Further, the central axis further includes fixed ring, and the outer rim of the fixed ring is for fixing filter plate；Fixed interannular
Gap cooperates the head end for being set in the second center-pole, and is pressed abd fixed on tail end end face and the second cyclic annular substrate of the first center-pole
Between end face；The length of filter plate is less than the distance between the first cyclic annular substrate and the second cyclic annular substrate.
The overall structure that filter plate integrative installation technology is formed in fixed ring is equivalent to the prefabricated portion of third, prefabricated in assembling first
Before portion and the second prefabricated portion, first Fixing shrink ring is located on the second center-pole, finally fixed ring is pressed abd fixed in first
Between the tail end end face of core bar and the end face of the second cyclic annular substrate；The thickness of filter plate should be less than the first cyclic annular substrate and the second ring
The thickness of shape substrate can make filter plate tightening between the first cyclic annular substrate and the second cyclic annular substrate.
Further, first balancing pole, the second balancing pole and filter plate are all made of shape-memory material and are made；First is flat
The structure of weighing apparatus bar and the second balancing pole is identical, both includes the first segmental arc, the second segmental arc, ripple being sequentially connected end to end
Section and positioning hangnail, the bending direction of the first segmental arc and the second segmental arc on the contrary, the free end of the first segmental arc is fixed in
In mandrel, the axis direction of bellows segment and the axis direction of central axis are vertical.
Positioning hangnail is connect by bellows segment with the second segmental arc, buffer function is provided conducive to for positioning hangnail, prevents
Positioning hangnail causes excessively to injure to blood vessel, and the scalable line segment structure of spring structure or ripple struction can be used in bellows segment.
Invention has the following advantages and benefits:
1, the invention present invention is made of the main body framework structure of filter central axis and support portion, plays and supports and fixes work
With support portion is mainly made of two layers of umbrella-shaped structure, i.e., multiple first balancing poles are circumferentially arranged into first layer umbrella along central axis
Structure, multiple second balancing poles are circumferentially arranged into second layer umbrella-shaped structure along central axis, on the axis direction along blood vessel, increase
The stress point of filter and vascular wall, increase filter from center capacity, effectively prevent extending with standing time, body
The problems such as displacement of filter caused by the factors such as activity, inclination.Since the first balancing pole and the second balancing pole primarily serve fixation
The effect of filter house, therefore a small amount of balancing pole is only needed, and the first balancing pole and the second balancing pole is staggered, generally
2~4 the first balancing poles, 2~4 second balancing poles are symmetrical arranged, the fixed function to filter house is played and improve filter
Stability while, mitigate filter overall weight.Filter include the multiple filter bulbs being arranged on the first balancing pole and
The filter plate contacted with the second balancing pole, the filter bulb on the first balancing pole form the first filter layer convection current and are filtered for the first time through blood
And thrombus flow velocity is reduced, the filter plate on the second balancing pole forms the second filter layer convection current and carries out secondary filter through blood；Filter bulb
Filter efficiency is improved for the chondritic that elastic strands material is entwined conducive to the contact area increased with blood；Filter plate one
Aspect can the biggish thrombus of effectively catching volume, on the other hand play a supporting role to the second balancing pole, this is because filter
When in use, the second balancing pole generates along central axis radially inward squeezing action filter plate, and filter plate is in inside compression shape
State, the restoring force of filter plate itself can give the second balancing pole certain pretightning force, in filter run-off the straight tendency, this
It plants pretightning force and gives the enough supporting roles of the second balancing pole with counterbalancing tiit active force, effectively maintain the stabilization of filter
Property；
2, it invents filter overall structure of the present invention to constitute using prefabricated component assembling form, the first center-pole, the first ring-type
Substrate and multiple first balancing poles being fixed on the first cyclic annular substrate may make up the first prefabricated portion, the second center-pole, second
Cyclic annular substrate and multiple second balancing poles being fixed on the second cyclic annular substrate may make up the second prefabricated portion, can be according to patient's reality
The demand on border selects matched first prefabricated portion and the second prefabricated portion, is embedded in the first center-pole by the second center-pole, then lead to
Cross the connection that the modes such as bolt or welding realize the first prefabricated portion Yu the second prefabricated portion；Filter plate integrative installation technology is in fixed ring
The overall structure of formation is equivalent to the prefabricated portion of third, before the first prefabricated portion that assembles and the second prefabricated portion, first by Fixing shrink ring
It is located on the second center-pole, fixed ring is finally pressed abd fixed on to the tail end end face and the end of the second cyclic annular substrate of the first center-pole
Between face；The thickness of filter plate should be less than the thickness of the first cyclic annular substrate and the second cyclic annular substrate, and filter plate tightening can be made first
Between cyclic annular substrate and the second cyclic annular substrate.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand inventive embodiments, constitutes part of this application,
The restriction to inventive embodiments is not constituted.In the accompanying drawings:
Fig. 1 is the overall structure diagram of invention；
Fig. 2 is that the central axis of invention is locally quick-fried according to figure；
Fig. 3 is the filter bulb mounting structure schematic diagram of invention；
Fig. 4 is the filter bulb structural schematic diagram of invention；
Fig. 5 is the overlooking structure diagram of invention；
Fig. 6 is the filter-plate structure schematic diagram of invention.
Label and corresponding parts title in attached drawing: 1- central axis, the first center-pole of 11-, the second center-pole of 12-, 13-
First cyclic annular substrate, the cyclic annular substrate of 14- second, 15- locating groove, 16- positioning protrusion, 17- recessing groove, 18- fixed ring, 2- branch
Support part, the first balancing pole of 21-, the second balancing pole of 22-, 23- annular groove, the first segmental arc of 24-, the second segmental arc of 25-, 26- wave
Line section, 27- position hangnail, 3- filter house, 31- filter bulb, 310- positioning ring, 311- Elastic silk screen, 32- filter plate.
Specific embodiment
For the purposes, technical schemes and advantages of invention are more clearly understood, below with reference to embodiment and attached drawing, to invention
It is described in further detail, the exemplary embodiment and its explanation of invention are only used for explaining invention, are not intended as to invention
Restriction.
Embodiment 1
A kind of vena cave implantation thrombus filter, including central axis 1, support portion 2 and filter house 3 are present embodiments provided,
Support portion 2 includes four the first balancing poles 21 and four the second balancing poles 22, and the first balancing pole 21 and the second balancing pole 22 are adopted
The material of the flexible memory function of apparatus is made, and any section of the two is circular configuration, can be in side wall to mitigate weight
On open up groove.Four the first balancing poles 21 are set to the head end of central axis 1 and are uniformly distributed along the circumferential direction of central axis 1 in umbrella
Structure, four the second balancing poles 22 are set to the tail end of central axis 1 and are uniformly distributed along the circumferential direction of central axis 1 in umbrella mechanism, In
Along the axis projection direction of central axis 1, the first balancing pole 21 and the second balancing pole 22 are interspersed；First balancing pole 21 and
The free end end of two balancing poles 22 is contacted with blood vessel；The settable recovering hook in tail end end of central axis 1.
Filter house 3 includes filter bulb 31 and filter plate 32；Direction is extended along on each first balancing pole 21 be uniformly distributed be equipped with
Multiple filter bulbs 31, filter bulb 31 are the chondritic that elastic strands material is entwined, and filter bulb 31, which is equipped with, is used for the first balancing pole
21 through-holes passed through；Four filter plates 32 are set on 1 shaft part of central axis between the first balancing pole 21 and the second balancing pole 22,
Four filter plates 32 are circumferentially equidistantly uniformly distributed along central axis 1, and the underface of each second balancing pole 22 is correspondingly arranged one
Filter plate 32；When in use, the second balancing pole 22 generates along the radially inward squeezing action of central axis 1, filter filter plate 32 to filter
Plate 32 is in inside compressive state.
Embodiment 2
It is further improved on the basis of embodiment 1, the filter bulb 31 on each first balancing pole 21 includes major diameter filter bulb
31 and minor diameter filter bulb 31, major diameter filter bulb 31 and minor diameter filter bulb 31 be arranged alternately, and it is big on the direction far from central axis 1
The outer diameter of diameter filter bulb 31 is gradually reduced；The outer diameter of minor diameter filter bulb 31 is less than the outer diameter of the smallest major diameter filter bulb 31.Filter bulb
31 include two positioning rings 310 and the Elastic silk screen 311 between two positioning rings 310, and two positioning rings 310 are rigidity
Hollow structure, two 310 axial lines of positioning ring are overlapped two ports for being oppositely arranged the through-hole as filter bulb 31, elastic yarn knot
Structure is with the Elastic silk screen 311 that both ends positioning ring 310 is that fixed base point is wound ball-type；First balancing pole 21 is equipped with multiple
Annular groove 23, the inner wall clearance fit of positioning ring 310 and annular groove 23 on filter bulb 31, and the internal diameter of positioning ring 310 are less than the
The outer diameter of one balancing pole 21；Annular groove 23 is most greatly enhanced along the length of 1 axial direction of central axis greater than Elastic silk screen 311 is stretchable
Degree.
Embodiment 3
It is further improved on the basis of embodiment 2, the filter plate 32 is the elastic hollow out of tapered structure, and filter plate 32
Maximum width be greater than the second balancing pole 22 outer diameter.
Embodiment 4
It is further improved on the basis of embodiment 3, the central axis 1 includes the first center-pole 11 and the second center-pole
12, the first center-pole 11 and the second center-pole 12 are hollow tubular structures；The head end integration integration of first center-pole 11
It is arranged with the first cyclic annular substrate 13, the first balancing pole 21 is set on the first cyclic annular substrate 13 and direction 11 head end of the first center-pole
Plate face on；Fixed, the second center-pole 12 in the tail end of head end interference fit the first center-pole 11 of insertion of second center-pole 12
Tail end integration covering be equipped with the second cyclic annular substrate 14, the outer diameter of the second cyclic annular substrate 14 is greater than the central tube of the second center-pole 12
Internal diameter, the second balancing pole 22 are set on the second cyclic annular substrate 14 and in the plate face of direction 12 tail end of the second center-pole.First center
It is circumferentially distributed on the inner wall of 11 tail end of bar that there are four locating groove 15, axial direction of each locating groove 15 along the first center-pole 11
Continuous helical shape extends；It is circumferentially distributed on the outer wall of second center-pole, 12 head end that there are four positioning protrusion 16, positioning protrusion
16 are adapted to locating groove 15.It is circumferentially distributed on the lateral wall of first cyclic annular substrate 13 that there are four recessing groove 17, recessing grooves 17
For making way for the second balancing pole 22.Central axis 1 further includes fixed ring 18, and the outer rim of fixed ring 18 is for fixing filter plate 32；Gu
Determine the head end that 18 clearance fit of ring is set in the second center-pole 12, and is pressed abd fixed on the tail end end face of the first center-pole 11 and the
Between the end face of two cyclic annular substrates 14；The length of filter plate 32 less than between the first cyclic annular substrate 13 and the second cyclic annular substrate 14 away from
From.
Embodiment 5
It is further improved on the basis of embodiment 4, first balancing pole 21, the second balancing pole 22 and filter plate 32 are adopted
It is made of shape-memory material；First balancing pole 21 is identical with the structure of the second balancing pole 22, both includes successively connecting from beginning to end
The first segmental arc 24, the second segmental arc 25, bellows segment 26 and the positioning hangnail 27 connect, and the first segmental arc 24, the second segmental arc
25, bellows segment 26 and positioning 27 integrated molding of hangnail, the bending direction of the first segmental arc 24 and the second segmental arc 25 is on the contrary, the
The free end of one segmental arc 24 is fixed on central axis 1, and the axis direction of bellows segment 26 is vertical with the axis direction of central axis 1,
Bellows segment 26 is the ripple linearity structure of elasticity.
Above-described specific embodiment has carried out further in detail the purpose of invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the foregoing is merely the specific embodiment of invention, is not used to limit the protection of invention
Range, all within the spirit and principle of invention, any modification, equivalent substitution, improvement and etc. done should be included in invention
Within protection scope.
Claims (10)
1. a kind of vena cave is implanted into thrombus filter, which is characterized in that including central axis (1), support portion (2) and filter house (3),
The support portion (2) includes several first balancing poles (21) and several second balancing poles (22), and several first balancing poles (21) set
In central axis (1) head end and be uniformly distributed along the circumferential direction of central axis (1) in umbrella-shaped structure, several second balancing poles (22) set
In central axis (1) tail end and be uniformly distributed along the circumferential direction of central axis (1) in umbrella mechanism, thrown in the axial direction along central axis (1)
On shadow direction, the first balancing pole (21) and the second balancing pole (22) are interspersed；First balancing pole (21) and the second balancing pole
(22) free end end is contacted with blood vessel；
The filter house (3) includes filter bulb (31) and filter plate (32)；It is uniform that direction is extended along on each first balancing pole (21)
It is distributed with multiple filter bulbs (31), the chondritic that the filter bulb (31) is entwined for elastic strands material, on filter bulb (31)
Equipped with the through-hole passed through for the first balancing pole (21)；Center between the first balancing pole (21) and the second balancing pole (22)
It is arranged several filter plates (32) on axis (1) shaft part, several filter plates (32) are circumferentially uniformly distributed along central axis (1), and each second flat
A filter plate (32) is correspondingly arranged immediately below weighing apparatus bar (22)；When in use, the second balancing pole (22) is to filter plate (32) for filter
It generates along central axis (1) radially inward squeezing action, filter plate (32) is in inside compressive state.
2. a kind of vena cave according to claim 1 is implanted into thrombus filter, which is characterized in that each first balancing pole
(21) filter bulb (31) on includes major diameter filter bulb (31) and minor diameter filter bulb (31), major diameter filter bulb (31) and minor diameter filter bulb
(31) it is arranged alternately, and the outer diameter of major diameter filter bulb (31) is gradually reduced on the direction far from central axis (1)；Minor diameter filter bulb
(31) outer diameter is less than the outer diameter of the smallest major diameter filter bulb (31).
3. a kind of vena cave according to claim 1 is implanted into thrombus filter, which is characterized in that the filter bulb (31) includes
Two positioning rings (310) and the Elastic silk screen (311) being set between two positioning rings (310), two positioning rings (310) are steel
Property hollow structure, two positioning ring (310) axial lines are overlapped two ports for being oppositely arranged the through-hole as filter bulb (31), bullet
Sex pilus structure is with the Elastic silk screen (311) that both ends positioning ring (310) are that fixed base point is wound ball-type.
4. a kind of vena cave according to claim 3 is implanted into thrombus filter, which is characterized in that first balancing pole
(21) it is equipped with several annular grooves (23), the inner wall clearance fit of positioning ring (310) and annular groove (23) on filter bulb (31),
And the internal diameter of positioning ring (310) is less than the outer diameter of the first balancing pole (21)；Length of the annular groove (23) along central axis (1) axial direction
Degree is greater than Elastic silk screen (311) stretchable maximum length.
5. a kind of vena cave according to claim 1 is implanted into thrombus filter, which is characterized in that the filter plate (32) be in
The elastic hollow out of pyramidal structure, and the maximum width of filter plate (32) is greater than the outer diameter of the second balancing pole (22).
6. a kind of vena cave according to claim 1 is implanted into thrombus filter, which is characterized in that central axis (1) packet
The first center-pole (11) and the second center-pole (12) are included, the first center-pole (11) and the second center-pole (12) are hollow tubular knots
Structure；The head end integration covering of first center-pole (11) is equipped with the first cyclic annular substrate (13), and the first balancing pole (21) is set to the first ring
In plate face on shape substrate (13) and towards the first center-pole (11) head end；The head end interference fit of second center-pole (12) is inserted
Enter in the tail end of the first center-pole (11) fixed, the tail end of the second center-pole (12) is arranged with the second cyclic annular substrate (14), and second
The outer diameter of cyclic annular substrate (14) is greater than the inner diameter of centerpipe of the second center-pole (12), and the second balancing pole (22) is set to the second cyclic group
In plate face on plate (14) and towards the second center-pole (12) tail end.
7. a kind of vena cave according to claim 6 is implanted into thrombus filter, which is characterized in that first center-pole
(11) circumferentially distributed on the inner wall of tail end to have several locating grooves (15), each locating groove (15) is along the first center-pole (11)
It is axially extending；It is circumferentially distributed on the outer wall of second center-pole (12) head end to have several positioning protrusion (16), positioning
Raised (16) are adapted to locating groove (15).
8. a kind of vena cave according to claim 6 is implanted into thrombus filter, which is characterized in that the described first cyclic annular substrate
(13) circumferentially distributed on lateral wall to have several recessing grooves (17), the recessing groove (17) is for making way for the second balancing pole
(22)。
9. a kind of vena cave according to claim 6 is implanted into thrombus filter, which is characterized in that the central axis (1) is also
Including fixed ring (18), the outer rim of the fixed ring (18) is for fixing filter plate (32)；Fixed ring (18) clearance fit is set in
The head end of second center-pole (12), and it is pressed abd fixed on tail end end face and the second cyclic annular substrate (14) of the first center-pole (11)
Between end face；The length of filter plate (32) is less than the distance between the first cyclic annular substrate (13) and the second cyclic annular substrate (14).
10. a kind of vena cave according to claim 1 is implanted into thrombus filter, which is characterized in that first balancing pole
(21), the second balancing pole (22) and filter plate (32) are all made of shape-memory material and are made；First balancing pole (21) and the second balance
The structure of bar (22) is identical, both includes the first segmental arc (24), the second segmental arc (25), bellows segment being sequentially connected end to end
(26) and hangnail (27) are positioned, the bending direction of the first segmental arc (24) and the second segmental arc (25) is on the contrary, the first segmental arc
(24) free end is fixed on central axis (1), and the axis direction of bellows segment (26) is vertical with the axis direction of central axis (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233547.9A CN109771092B (en) | 2019-03-26 | 2019-03-26 | A kind of vena cave implantation thrombus filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910233547.9A CN109771092B (en) | 2019-03-26 | 2019-03-26 | A kind of vena cave implantation thrombus filter |
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| Publication Number | Publication Date |
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| CN109771092A CN109771092A (en) | 2019-05-21 |
| CN109771092B true CN109771092B (en) | 2019-11-12 |
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| CN201910233547.9A Active CN109771092B (en) | 2019-03-26 | 2019-03-26 | A kind of vena cave implantation thrombus filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231589B1 (en) * | 1999-03-22 | 2001-05-15 | Microvena Corporation | Body vessel filter |
| US7686825B2 (en) * | 2004-03-25 | 2010-03-30 | Hauser David L | Vascular filter device |
| CN101143114B (en) * | 2006-09-14 | 2011-01-12 | 微创医疗器械(上海)有限公司 | Double-layer venous filter |
| JP6158616B2 (en) * | 2013-07-09 | 2017-07-05 | 株式会社パイオラックスメディカルデバイス | Foreign body capture device in body cavity |
| GB2517992A (en) * | 2013-09-09 | 2015-03-11 | Cook Medical Technologies Llc | Vena cava filter |
| JP6352642B2 (en) * | 2013-12-03 | 2018-07-04 | 川澄化学工業株式会社 | Intravascular foreign body removal catheter |
| CN206007409U (en) * | 2016-04-22 | 2017-03-15 | 上海形状记忆合金材料有限公司 | A kind of variable vein filter tool |
| CN105943197A (en) * | 2016-04-29 | 2016-09-21 | 湖南埃普特医疗器械有限公司 | Vena cava filter |
| CN108272530A (en) * | 2017-03-06 | 2018-07-13 | 上海宏普医疗器械有限公司 | A kind of recyclable Caval vein thrombus filter of double umbellate forms |
| CN207821947U (en) * | 2017-04-11 | 2018-09-07 | 杭州唯强医疗科技有限公司 | With from central vena cava filter |
| CN208552125U (en) * | 2017-09-29 | 2019-03-01 | 微创心脉医疗科技（上海）有限公司 | Filter unit |
| CN109199632B (en) * | 2018-09-26 | 2024-02-20 | 李雷 | Inferior vena cava embolic filter |
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Effective date of registration: 20200826 Address after: 610000, No. 270, Rong Sheng Avenue, Chengdu, Sichuan, Jinniu District Patentee after: WESTERN THEATER GENERAL HOSPITAL OF PLA Address before: 610000 Jinniu District City, Sichuan Province, Rong Road, the total number of days on the road, No. 270 Patentee before: Li Ying |
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