CN108143517A - Filter - Google Patents
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- CN108143517A CN108143517A CN201611109353.0A CN201611109353A CN108143517A CN 108143517 A CN108143517 A CN 108143517A CN 201611109353 A CN201611109353 A CN 201611109353A CN 108143517 A CN108143517 A CN 108143517A
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- Prior art keywords
- cross
- section
- protrusion
- filter
- ratio
- Prior art date
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Links
- 210000004204 blood vessel Anatomy 0.000 abstract description 9
- 238000004804 winding Methods 0.000 abstract description 9
- 230000008602 contraction Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 230000002792 vascular Effects 0.000 description 12
- 229910052786 argon Inorganic materials 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 208000010378 Pulmonary Embolism Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005498 polishing Methods 0.000 description 5
- 238000005488 sandblasting Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 208000007536 Thrombosis Diseases 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 210000002889 endothelial cell Anatomy 0.000 description 1
- 210000003038 endothelium Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/0108—Both ends closed, i.e. legs gathered at both ends
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
Landscapes
- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a kind of filter, including proximal end, distal end and the filter body between being connected to proximally and distally.Filter body includes being the first filter element of reticular structure, the second filter element and the middle brace rod of the first filter element of multiple connections and the second filter element.Middle brace rod is equipped with supporting rod.Supporting rod includes the supporting section for bending from the outwardly extending changeover portion of middle brace rod and from changeover portion and extending towards proximal end.The tip of supporting section is equipped with the round and smooth protrusion of outer profile, and the outer profile of protrusion is transitioned into the part of supporting section to seamlessly transit.The filter of the present invention solves the problems, such as that filter opens the mutual winding between supporting rod in contraction or expansion, improves the availability of filter, it is ensured that operation is smoothed out.And the smooth protrusion of outer profile greatly reduces the possibility that supporting rod punctures blood vessel.
Description
Technical field
The present invention relates to cardiovascular implanted medical device more particularly to one kind can be planted by intervening mode in it is endovascular can
Recycle vena cava filter.
Background technology
Vena cava filter (hereinafter referred to as filter) is clinically proved to be prevention pulmonary embolism safely and effectively means, can drop
The incidence of low pulmonary embolism.But filter implantation inferior caval vein is after a certain period of time, due to the stimulation to blood vessel, filter supporting rod meeting
It is climbed to some extent by endothelial cell and covers, wraps up, cause to be difficult to take out, human body can only be chronically implanted as permanent filter.And it filters
Device Permanent implantation human body has certain risk, such as：Filter contacts for a long time with blood and blood vessel endothelium, it may occur however that protein is inhaled
Attached, platelet adhesion reaction, ultimately forming thrombus causes vein blood vessel to block or pulmonary embolism is caused to occur again；It is chronically implanted in vivo, has
Filter deformation, the danger for tilting, shift, being broken or even penetrating blood vessel etc. occurs.
Filter is fabricated to structure closed at both ends, and increases the open supporting rod for being abutted with vascular wall, it can
Extend the recovery time of temporary filter.But such filter, when being delivered to precalculated position expansion through conveying sheath, opening supports
There may be mutually winding between bar, cause filter that cannot smoothly be unfolded in the blood vessels, reduce the availability of filter, cause
Operation can not be successfully progress.And there is the risk for puncturing vascular wall in the end of open supporting rod, increase postoperative complications
Occurrence probability.
Invention content
The technical problem to be solved in the present invention is, in view of the drawbacks of the prior art, provide one kind will not puncture vascular wall,
It is not susceptible to winding, the higher vena cava filter of availability.
The technical solution adopted by the present invention to solve the technical problems is：A kind of filter is provided, including proximal end, distal end and
The filter body being connected between the proximal end and the distal end, the filter body include be reticular structure first filtering
Unit, the second filter element and multiple middle brace rods for connecting first filter element and second filter element,
The middle brace rod is equipped with supporting rod, the supporting rod include from the outwardly extending changeover portion of the middle brace rod and
It being bent from the changeover portion and towards the supporting section that proximal end extends, the tip of the supporting section is equipped with the round and smooth protrusion of outer profile,
The outer profile of the protrusion is transitioned into the part of the supporting section to seamlessly transit.
In one embodiment of this invention, the cross section of the supporting section includes two contour lines being oppositely arranged, described
The cross section of protrusion includes the first side and second side that are respectively connected with two contour lines of the supporting section cross section,
Between the first side and wherein a contour line and between the second side and another contour line
To seamlessly transit, and the first side and the second side and two contour lines angle in obtuse angle.
In one embodiment of this invention, the cross section of the protrusion further includes the third being connected with the first side
Side and the four side being connected with the second side and third side are to seamlessly transit between each side.
In one embodiment of this invention, the cross section of the protrusion is shorter compared with long-diagonal and one diagonal with one
Line, the first side and the intersection point of the second side extended line are fallen described compared on long-diagonal, and the protrusion is transversal
The size in face meets the following conditions：
1) the third side or the four side are in the length compared with orthographic projection on long-diagonal and the support
The ratio of section cross-sectional width is between 0 to 4；
2) described in compared with the length of long-diagonal and the ratio of the supporting section cross-sectional width between 0 to 6；
3) ratio of the length compared with short diagonal and the supporting section cross-sectional width is more than 1.
In one embodiment of this invention, the cross section of the protrusion further includes the connection first side and described the
The intersection point of the semi arch of dual side-edge, the first side and the second side extended line falls two profiles in the supporting section
Between line, the size of the protrusion cross section meets the following conditions：
1) ratio between the radius of the semi arch and the supporting section cross-sectional width is more than 0；
2) ratio between the diameter of the semi arch and the supporting section cross-sectional width is not less than 1；
3) line between the intersection point and the semi arch midpoint of the first side and the second side extended line is long
Ratio between degree and the supporting section cross-sectional width is between 0 to 5.
In one embodiment of this invention, the cross section of the protrusion further include respectively with the first side and described
The arc section of two straightways of straightway and connection that second side is connected, the size of the cross section of the protrusion meet
The following conditions：
1) ratio between the radius of the arc section and the supporting section cross-sectional width is more than 0；
2) ratio between the diameter of the arc section and the supporting section cross-sectional width is more than 1；
3) line between the intersection point and the arc section midpoint of the first side and the second side extended line is long
Ratio between degree and the supporting section cross-sectional width is between 0 to 5；
4) straightway is in condition 3) described in wire length on orthographic projection length and the supporting section cross section it is wide
Ratio between degree is more than 0；
5) ratio between the minimum perpendicular distance between two straightways and the supporting section cross-sectional width is not small
In 1.
In one embodiment of this invention, the first side and the second side are circular arc line and the first side
It is connected with one end of the second side by circular arc, then the size of the cross section of the protrusion meets the following conditions：
1) between the maximum distance between the first side and the second side and the supporting section cross-sectional width
Ratio be more than 1；
2) wire length between the first side and the second side intersection point and the intersection point of its other end extended line
Ratio between the supporting section cross-sectional width is more than 1.
In one embodiment of this invention, the cross section of the protrusion further includes the third being connected with the first side
Side, the 5th side being connected with the third side, the four side being connected with the second side and with the described 4th
The 6th side that side is connected with the 5th side is to seamlessly transit between each side.
In one embodiment of this invention, the section of the protrusion, which has, connects the first side and the second side
Side extending line intersection point and the 5th side and the cross section of the relatively long-diagonal, the then protrusion of the 6th side intersection point
Size meets the following conditions：
1) the 5th side or the 6th side are fallen in the orthographic projection length compared on long-diagonal and the branch
The ratio between section cross-sectional width is held between 0 to 6；
2) the third side or the four side are fallen in the projected length compared on long-diagonal and the bearing
Ratio between section cross-sectional width is between 0 to 6；
3) it is described to be more than 1 compared with the ratio between the length of long-diagonal and the supporting section cross-sectional width；
4) between the maximum distance between the 5th side and the 6th side and the supporting section cross-sectional width
Ratio be more than 1.
In one embodiment of this invention, the end of the protrusion is additionally provided with the round and smooth chondritic of outer profile.
In one embodiment of this invention, the supporting rod on adjacent two middle brace rods is interspersed.
In one embodiment of this invention, at least one in first filter element and second filter element by
The Y shape strainer bar for collecting in the proximal end or distal end is formed.
In one embodiment of this invention, the quantity of the first filter element Y shape strainer bar is single for the described second filtering
The half of first Y shape strainer bar quantity.
The supporting rod tip of filter of the present invention is equipped with the round and smooth protrusion of outer profile, and the outer profile of protrusion is transitioned into branch
The part of support section to seamlessly transit, this structure design solve filter opened in contraction or expansion it is mutual between supporting rod
The problem of winding, improves the availability of filter, it is ensured that operation is smoothed out.And the smooth protrusion of outer profile substantially reduces
Supporting rod punctures the possibility of blood vessel.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is a kind of structure diagram of filter preferred embodiment of the present invention；
Fig. 2 is the structure diagram of supporting rod in filter of the invention；
Fig. 3 is the cross-sectional view of the supporting rod tip protrusion first embodiment in the filter of the present invention；
Fig. 4 is the cross-sectional view of the supporting rod tip protrusion second embodiment in the filter of the present invention；
Fig. 5 is the cross-sectional view of the supporting rod tip protrusion 3rd embodiment in the filter of the present invention；
Fig. 6 is the cross-sectional view of the supporting rod tip protrusion fourth embodiment in the filter of the present invention；
Fig. 7 is the cross-sectional view of the 5th embodiment of supporting rod tip protrusion in the filter of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific embodiment of the present invention.
As depicted in figs. 1 and 2, a kind of filter 10 includes distal end 1, proximal end 2 and is connected between distal end 1 and proximal end 2
Filter body.Filter body includes the first filter element 3 and second of the first filter element 3, the second filter element 4 and multiple connections
The middle brace rod 5 of filter element 4.Line of multiple middle brace rods 5 around distal end 1 and proximal end 2 is evenly spaced on.First
Filter element 3 collects in distal end 1 by multiple Y shape strainer bars 31 and is formed such that 3 tapered reticular structure of the first filter element, and second
Filter element 4 also collects in proximal end 2 by multiple Y shape strainer bars 41 and is formed such that 4 tapered reticular structure of the second filter element, and
The quantity of the Y shape strainer bar 31 of first filter element 3 is the half of 41 quantity of Y shape strainer bar of the second filter element 4, makes filter
10 be in unsymmetric structure on the whole.Such asymmetrical structure has selectivity to pre-filtered thrombus, i.e., only filtering can make
Into the thrombus of pulmonary embolism, so as to ensure venacaval long-term patency.Filter distal end 1 is additionally provided with recovering hook and (does not mark simultaneously
Show), during for being used as temporary filter recycling use.
The supporting rod 6 and 7 for being abutted with vascular wall is additionally provided on middle brace rod 5.The effect of supporting rod 6 and 7 is
It is contacted after filter implantable intravascular with vascular wall, makes middle brace rod 5 far from vascular wall, so as to prevent endangium in filter surface
Climb the problem of recovery time window is short caused by covering.Supporting rod 6 is identical with the structure of supporting rod 7, by taking supporting rod 7 as an example, supporting rod 7
Including the changeover portion 71 extended from middle brace rod 5 to vascular wall direction and the supporting section 72 extended from changeover portion 71, support
Section 72 is used to abut with vascular wall.It is only additionally provided with to be pierced into the fixation anchor 61 in vascular wall on supporting rod 6, and supporting rod
7 are not provided with fixed anchor, and fixed anchor 61 can make filter more firm in the blood vessels.And in the preferred embodiment, a centre connects
A supporting rod 6 or 7, and the supporting rod interlaced arrangement on adjacent middle brace rod 5 are provided only on extension bar 5, so that branch
Strut can provide support force more uniformly, stable for filter in the blood vessel, prevent filter due to tilting, shifting in the blood vessel
Thrombus filter effect is caused to weaken, the risk of postoperative patient pulmonary embolism improves；At the same time, filter bar is dramatically reduced
Puncture the incidence of vascular wall.In other possible embodiments, two or more can also be set on middle brace rod
Supporting rod, these supporting rods can be fixed on any position of middle brace rod, on condition that by supporting rod changeover portion and
The opening direction that supporting section is formed should be opposite with the direction that filter is removed.
The tip 73 of supporting section 72 is additionally provided with the round and smooth protrusion of outer profile, and the outer profile of the protrusion is transitioned into support
The part of section 72 is all to seamlessly transit.Seamlessly transitting in the present invention is referred to through circular arc or chamfered transition.And protrusion
Cross-sectional shape can there are many, will be described further below by several embodiments come the cross-sectional shape to protrusion：
First embodiment：
As shown in figure 3, in this embodiment, in quadrangle, the cross section of supporting section 72 has for the cross section of protrusion 20
Two contour lines 72a and 72b.The cross section of protrusion 20 include with contour line 72a in obtuse angle the first side 20a of angle, with
Contour line 72b in obtuse angle the second side 20b of angle, the third side 20c that is connected with first side 20a and simultaneously with third
The four side 20d that side 20c is connected with second side 20b.Wherein, first side 20a and second side 20b respectively with profile
Line 72a is connected with 72b and is to seamlessly transit between any two.And between first side 20a and third side 20c, third side
It is to seamlessly transit between 20c and four side 20d and four side 20d and second side 20b so that protrusion 20
Round and smooth form is presented in outer profile.Specifically, protrusion 20 can pass through the mechanical means such as mechanical sandblasting, polishing, chemical method
Or argon arc welding is processed into smooth surface.
The intersection point of first side 20a and second side 20b extended lines is fallen between contour line 72a and 72b, connection third side
Side 20c is protruded with the intersection point of four side 20d extended lines, with first side 20a and the intersection point of second side 20b extended lines
The one of 20 cross section of portion is compared with long-diagonal A, intersection points and second side of the connection first side 20a with third side 20c extended lines
The intersection point of 20b and four side 20d extended lines obtains the one of 20 cross section of protrusion compared with short diagonal A '.If third side 20c
Or four side 20d be L1 compared with the orthographic projection length on long-diagonal A, the width of 72 cross section of supporting section is L5, longer right
The length of linea angulata A is L2 and the length compared with short diagonal A ' is L3；Playing protrusion 20 prevents filter from shrinking or opening up
The effect of winding problem when opening between supporting rod, then the cross sectional dimensions of protrusion 20 should meet the following conditions：
1) 0 ＜ L1/L5 ＜ 4；
2) 0 ＜ L2/L5 ＜ 6；
3) L3/L5 ＞ 1.
Second embodiment：
As shown in figure 4, in this embodiment, in water-drop-shaped, the cross section of supporting section 72 has for the cross section of protrusion 30
Two contour lines 72a and 72b.The cross section of protrusion 30 include with contour line 72a in obtuse angle the first side 30a of angle, with
Contour line 72b the second side 30b of angle and the semicircle being connected simultaneously with first side 30a and second side 30b in obtuse angle
Arc 30c.Wherein, first side 30a and second side 30b is connected with contour line 72a and 72b and is smooth between any two respectively
Transition.Likewise, protrusion 30 can be processed by the mechanical means such as mechanical sandblasting, polishing, chemical method or argon arc welding it is flat
Sliding surface.
The intersection point of first side 30a and second side 30b extended lines is fallen between contour line 72a and 72b, connects the first side
Side 30a obtains a pair of of linea angulata of 30 cross section of protrusion with the intersection point of second side 30b extended lines and the midpoint of semi arch 30c
B.If the radius of semi arch 30c is L1, the length of diagonal B is L2, the horizontal stroke of a diameter of L3 of semi arch 30c and supporting section 72
Cross-sectional width is L5；Protrusion 30 is made to play the role of the winding problem for preventing filter in contraction or expansion between supporting rod,
Then the cross sectional dimensions of protrusion 30 should meet the following conditions：
1) L1/L5 ＞ 0；
2) 0 ＜ L2/L5 ＜ 5；
3)L3/L5≥1。
3rd embodiment：
As shown in figure 5, in this embodiment, in water-drop-shaped, the cross section of supporting section 72 has for the cross section of protrusion 40
Two contour lines 72a and 72b.The cross section of protrusion 40 include with contour line 72a in obtuse angle the first side 40a of angle, with
Contour line 72b in obtuse angle the second side 40b of angle, be connected with first side 40a straightway 40c, with second side 40b phases
The straightway 40e even and arc section 40d for connecting two straightway 40c and 40e.Wherein, first side 40a and second side
40b is connected with contour line 72a and 72b and is to seamlessly transit between any two respectively, two straightway 40c and 40e and arc section 40d
It is tangent.Likewise, protrusion 40 can be processed by the mechanical means such as mechanical sandblasting, polishing, chemical method or argon arc welding it is flat
Sliding surface.
The intersection point of first side 40a and second side 40b extended lines is fallen between contour line 72a and 72b, connects the first side
Side 40a obtains a pair of of linea angulata of 40 cross section of protrusion with the intersection point of second side 40b extended lines and the midpoint of arc section 40d
C.If the radius of arc section 40d is L1, the length of a diameter of L4 of arc section 40d, diagonal C are L3, straightway 40c or 40d
Orthographic projection length on diagonal C is L2, the cross-sectional width of supporting section 72 is L5 and straightway 40c and 40d it is most short
Vertical range is L6；Protrusion 40 is made to play the role of the winding problem for preventing filter in contraction or expansion between supporting rod,
Then the cross sectional dimensions of protrusion 40 should meet the following conditions：
1) L1/L5 ＞ 0；
2) L2/L5 ＞ 0；
3) 0 ＜ L3/L5 ＜ 5；
4) L4/L5 ＞ 1；
5)L6/L5≥1。
Fourth embodiment：
As shown in fig. 6, in this embodiment, the cross section of protrusion 50 is hexagonal, the cross section of supporting section 72 has
Two contour lines 72a and 72b.The cross section of protrusion 50 include with contour line 72a in obtuse angle the first side 50a of angle, with
Contour line 72b in obtuse angle the second side 50b of angle, be connected with first side 50a third side 50c, with third side 50c
Connected four side 50d, the 5th side 50e being connected with four side 50d and with the 5th side 50e and second side
The 6th side 50f that 50b is connected.Wherein, first side 50a and second side 50b be connected respectively with contour line 72a and 72b and
It is to seamlessly transit between any two, is to seamlessly transit between each side.Likewise, protrusion 50 can by mechanical sandblasting,
Mechanical means, chemical method or the argon arc weldings such as polishing are processed into smooth surface.
The intersection point of first side 50a and second side 50b extended lines is fallen between contour line 72a and 72b, connects the first side
Side 50a obtains a pair with the intersection point and four side 50d of second side 50b extended lines and the intersection point of the 5th side 50e extended lines
Linea angulata D.If four side 50d and the length of the 5th side 50e orthographic projections on diagonal D are L1, third side 50c or the 6th
50f length of orthographic projection on diagonal D in side is L2, the length of diagonal D is L3, four side 50d and the 5th side 50e
Maximum normal distance be L4 and the cross-sectional width of supporting section 72 is L5；Playing protrusion 50 prevents filter from receiving
Contracting or expansion when supporting rod between winding problem effect, then the cross sectional dimensions of protrusion 50 should meet the following conditions：
1) 0 ＜ L1/L5 ＜ 6；
2) 0 ＜ L2/L5 ＜ 6；
3) L3/L5 ＞ 1；
4) L4/L5 ＞ 1.
5th embodiment：
As shown in fig. 7, in this embodiment, the cross section of protrusion 60 is oval, the cross section of supporting section 72 has
Two contour lines 72a and 72b.The cross section of protrusion 60 be in include with contour line 72a in obtuse angle angle first side 60a with
And the second side 60b with contour line 72b angles in obtuse angle, and first side 60a and second side 60b are equal in this embodiment
For circular arc line.Wherein, one end of first side 60a and second side 60b are connected respectively with contour line 72a and 72b, and the other end
Intersect and pass through orthodrome transition.Likewise, protrusion 60 can pass through the mechanical means such as mechanical sandblasting, polishing, chemical method
Or argon arc welding is processed into smooth surface.
The intersection point of first side 60a and second side 60b extended lines is fallen between contour line 72a and 72b, and oval cuts
Face has the long axis E and short axle F vertical with long axis E.If the length of long axis E is L1, the length of short axle F is L2 and supporting section 72
Cross-sectional width be L5；Protrusion 60 is made to play the work of winding problem for preventing filter in contraction or expansion between supporting rod
With then the cross sectional dimensions of protrusion 60 should meet the following conditions：
1) L1/L5 ＞ 1；
2) L2/L5 ＞ 1.
In the above embodiments, the round and smooth chondritic of outer profile can also be increased in the end of protrusion, further
Prevent supporting rod from puncturing vascular wall.The end that the round and smooth chondritic of the outer profile can handle protrusion by argon arc welding obtains
It arrives.It should be understood that other than obtaining the round and smooth chondritic of outer profile in the end-o f-pipe -control of protrusion, any one will not
The structure for puncturing vascular wall may be located on the end of protrusion.
Claims (13)
1. a kind of filter, including proximal end, distal end and the filter body being connected between the proximal end and the distal end, the filter
Device main body is including being that the first filter element, the second filter element and multiple connections described first of reticular structure filter list
The middle brace rod of first and described second filter element, the middle brace rod are equipped with supporting rod, and the supporting rod is included certainly
It the outwardly extending changeover portion of the middle brace rod and is bent from the changeover portion and towards the supporting section that proximal end extends, feature
It is, the tip of the supporting section is equipped with the round and smooth protrusion of outer profile, and the outer profile of the protrusion is transitioned into the support
The part of section is seamlessly transits.
2. filter according to claim 1, which is characterized in that the cross section of the supporting section was oppositely arranged including two
Contour line, the cross section of the protrusion include the first side being respectively connected with two contour lines of the supporting section cross section
And second side, between the first side and wherein a contour line and second side with another described in
It is to seamlessly transit between contour line, and the first side and the second side press from both sides in obtuse angle with two contour lines
Angle.
3. filter according to claim 2, which is characterized in that the cross section of the protrusion further includes and first side
While the third side being connected and the four side being connected with the second side and third side, between each side
To seamlessly transit.
4. filter according to claim 3, which is characterized in that the cross section of the protrusion have one compared with long-diagonal and
One compared with short diagonal, and the intersection point of the first side and the second side extended line is fallen described compared on long-diagonal, described
The size of protrusion cross section meets the following conditions：
1) the third side or the four side are horizontal in the length compared with orthographic projection on long-diagonal and the supporting section
The ratio of cross-sectional width is between 0 to 4；
2) described in compared with the length of long-diagonal and the ratio of the supporting section cross-sectional width between 0 to 6；
3) ratio of the length compared with short diagonal and the supporting section cross-sectional width is more than 1.
5. filter according to claim 2, which is characterized in that the cross section of the protrusion further includes connection described first
Side and the semi arch of the second side, the first side and the intersection point of the second side extended line are fallen in the support
Between two contour lines of section, the size of the protrusion cross section meets the following conditions：
1) ratio between the radius of the semi arch and the supporting section cross-sectional width is more than 0；
2) ratio between the diameter of the semi arch and the supporting section cross-sectional width is not less than 1；
3) wire length between the intersection point and the semi arch midpoint of the first side and the second side extended line with
Ratio between the supporting section cross-sectional width is between 0 to 5.
6. filter according to claim 2, which is characterized in that the cross section of the protrusion is further included respectively with described
Straightway that a side is connected with the second side and the arc section for connecting two straightways, the protrusion it is transversal
The size in face meets the following conditions：
1) ratio between the radius of the arc section and the supporting section cross-sectional width is more than 0；
2) ratio between the diameter of the arc section and the supporting section cross-sectional width is more than 1；
3) wire length between the intersection point and the arc section midpoint of the first side and the second side extended line with
Ratio between the supporting section cross-sectional width is between 0 to 5；
4) straightway is in condition 3) described in wire length on orthographic projection length and the supporting section cross-sectional width it
Between ratio be more than 0；
5) ratio between the minimum perpendicular distance between two straightways and the supporting section cross-sectional width is not less than 1.
7. filter according to claim 2, which is characterized in that the first side and the second side for circular arc line and
The first side is connected with one end of the second side by circular arc, then the cross section of the protrusion size meet with
Lower condition：
1) ratio between the maximum distance between the first side and the second side and the supporting section cross-sectional width
Value is more than 1；
2) wire length between the first side and the second side intersection point and the intersection point of its other end extended line and institute
The ratio stated between supporting section cross-sectional width is more than 1.
8. filter according to claim 2, which is characterized in that the cross section of the protrusion further includes and first side
While the third side being connected, the 5th side being connected with the third side, the four side being connected with the second side with
And the 6th side being connected with the four side and the 5th side, it is to seamlessly transit between each side.
9. filter according to claim 8, which is characterized in that the section of the protrusion, which has, connects the first side
It is with the second side extending line intersection point and the 5th side and the relatively long-diagonal of the 6th side intersection point, then described convex
The cross sectional dimensions for going out portion meets the following conditions：
1) the 5th side or the 6th side are fallen in the orthographic projection length compared on long-diagonal and the supporting section
Ratio between cross-sectional width is between 0 to 6；
2) the third side or the four side fall horizontal in the projected length compared on long-diagonal and the supporting section
Ratio between cross-sectional width is between 0 to 6；
3) it is described to be more than 1 compared with the ratio between the length of long-diagonal and the supporting section cross-sectional width；
4) ratio between the maximum distance between the 5th side and the 6th side and the supporting section cross-sectional width
Value is more than 1.
10. according to claim 1-9 any one of them filters, which is characterized in that the end of the protrusion is additionally provided with foreign steamer
Wide round and smooth chondritic.
11. filter according to claim 1, which is characterized in that the supporting rod on adjacent two middle brace rod
It is interspersed.
12. filter according to claim 1, which is characterized in that first filter element and second filter element
In at least one formed by the Y shape strainer bar for collecting in the proximal end or distal end.
13. filter according to claim 12, which is characterized in that the quantity of the first filter element Y shape strainer bar is
The half of the second filter element Y shape strainer bar quantity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109353.0A CN108143517B (en) | 2016-12-06 | 2016-12-06 | Filter device |
| PCT/CN2017/099027 WO2018103376A1 (en) | 2016-12-06 | 2017-08-25 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109353.0A CN108143517B (en) | 2016-12-06 | 2016-12-06 | Filter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108143517A true CN108143517A (en) | 2018-06-12 |
| CN108143517B CN108143517B (en) | 2024-07-05 |
Family
ID=62467753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611109353.0A Active CN108143517B (en) | 2016-12-06 | 2016-12-06 | Filter device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108143517B (en) |
| WO (1) | WO2018103376A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036590A (en) * | 2007-04-06 | 2007-09-19 | 华锦明 | Blood vessel and fistulae expending anastomosis instruments |
| CN200951143Y (en) * | 2006-09-06 | 2007-09-26 | 辽宁爱母医疗科技有限公司 | External shape structure on the end of intrauterine contraception |
| CN204909721U (en) * | 2015-06-30 | 2015-12-30 | 先健科技(深圳)有限公司 | Filter |
| CN105662646A (en) * | 2015-12-29 | 2016-06-15 | 先健科技(深圳)有限公司 | Filter |
| CN206761795U (en) * | 2016-12-06 | 2017-12-19 | 先健科技(深圳)有限公司 | Filter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652555B1 (en) * | 1999-10-27 | 2003-11-25 | Atritech, Inc. | Barrier device for covering the ostium of left atrial appendage |
| US8231649B2 (en) * | 2004-01-20 | 2012-07-31 | Boston Scientific Scimed, Inc. | Retrievable blood clot filter with retractable anchoring members |
| CN2710575Y (en) * | 2004-04-23 | 2005-07-20 | 深圳市先健科技股份有限公司 | Sustained release thrombus filter |
| RU2005141072A (en) * | 2005-12-28 | 2007-07-10 | Юрий Германович Андреев (RU) | PULMONARY ARTERIA THROMBOEMBOLIA PREVENTION KIT AND INTRAVENOUS FILTER |
| CN104970900B (en) * | 2015-06-26 | 2017-10-17 | 深圳市科奕顿生物医疗科技有限公司 | Recyclable thrombus filter |
-
2016
- 2016-12-06 CN CN201611109353.0A patent/CN108143517B/en active Active
-
2017
- 2017-08-25 WO PCT/CN2017/099027 patent/WO2018103376A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200951143Y (en) * | 2006-09-06 | 2007-09-26 | 辽宁爱母医疗科技有限公司 | External shape structure on the end of intrauterine contraception |
| CN101036590A (en) * | 2007-04-06 | 2007-09-19 | 华锦明 | Blood vessel and fistulae expending anastomosis instruments |
| CN204909721U (en) * | 2015-06-30 | 2015-12-30 | 先健科技(深圳)有限公司 | Filter |
| CN105662646A (en) * | 2015-12-29 | 2016-06-15 | 先健科技(深圳)有限公司 | Filter |
| CN206761795U (en) * | 2016-12-06 | 2017-12-19 | 先健科技(深圳)有限公司 | Filter |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018103376A1 (en) | 2018-06-14 |
| CN108143517B (en) | 2024-07-05 |
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