CN106806037B - Filter - Google Patents
Filter Download PDFInfo
- Publication number
- CN106806037B CN106806037B CN201510862958.6A CN201510862958A CN106806037B CN 106806037 B CN106806037 B CN 106806037B CN 201510862958 A CN201510862958 A CN 201510862958A CN 106806037 B CN106806037 B CN 106806037B
- Authority
- CN
- China
- Prior art keywords
- filter
- support bar
- filter screen
- distal end
- main part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 6
- 210000004204 blood vessel Anatomy 0.000 abstract description 26
- 230000002269 spontaneous effect Effects 0.000 abstract description 13
- 210000003462 vein Anatomy 0.000 description 12
- 230000002792 vascular Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 208000007536 Thrombosis Diseases 0.000 description 8
- 208000010378 Pulmonary Embolism Diseases 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000002513 implantation Methods 0.000 description 6
- 210000003191 femoral vein Anatomy 0.000 description 5
- 206010025482 malaise Diseases 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- 208000024891 symptom Diseases 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 208000005189 Embolism Diseases 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000003511 endothelial effect Effects 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
- 102000015081 Blood Coagulation Factors Human genes 0.000 description 1
- 108010039209 Blood Coagulation Factors Proteins 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 239000003114 blood coagulation factor Substances 0.000 description 1
- 210000001772 blood platelet Anatomy 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000035606 childbirth Effects 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000276 sedentary effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000008320 venous blood flow Effects 0.000 description 1
- 238000009941 weaving Methods 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
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)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The present invention discloses a kind of filter, including the main part with proximal part and distal end, main part includes the first filter screen of neighbouring proximal part and multiple being connected between proximal part and distal end and with the first filter screen respectively and the first support bar all between the first filter screen and distal end；First support bar substantially extends along the direction for the vertical central axis for being parallel to filter, and the ratio of the natural length of projected length and filter of each first support bar in the plane for the vertical central axis for being parallel to filter is greater than or equal to 1/11, and is less than or equal to 3/4.After filter Spontaneous release of the invention, can steadily, be safely placed in blood vessel, be not susceptible to tilt, and filter take out it is smaller to the damage of blood vessel.
Description
Technical field
The present invention relates to a kind of implanted medical device more particularly to a kind of filters.
Background technique
Pulmonary embolism is a kind of common disease, and case fatality rate is high, has statistics, the untreated pulmonary embolism death rate is
20%-30%, annual new cases account for about the 0.2% of population.China is calculated with 13.5 hundred million populations, newly-increased there are about 2,700,000 every year
Patient.
The various thrombus breaks looses of body circulation can cause pulmonary embolism, and there are many formative factors of thrombus, including wound
Or fracture, wound, biggish operation, large-area burns, gestation, childbirth, prolonged illness bed, it is long-distance by bus or aircraft it is sedentary,
Sit quietly and squat down for a long time it is equal venous blood flow can be made slow, the blood stasis of blood is stagnant or blood platelet and coagulation factor increase, and blood sticks
Attached property enhancing, forms thrombus.These thrombus generally with the slight adhesion of tube wall, are easy to fall off, and the free embolus to fall off can cause lung
The serious changes such as embolism.Vena cava filter (hereinafter referred to as filter) is clinically proved to be prevention pulmonary embolism safely and effectively hand
Section, can reduce the incidence of pulmonary embolism.Filter is implanted in inferior caval vein, and the thrombus for preventing lower limb from falling off is reached along blood flow
Lung, to prevent pulmonary embolism.
For temporary filter, it can be stably maintained at implantation position after clinically requiring it to be implanted into inferior caval vein, do not obtained
It now overturns, tilt；Also, the part of filter being bonded with vascular wall must not overstimulation vascular endothelial tissue rapid multiplication, with
Avoid vascular endothelial tissue embed filter, cause the recyclable phase of temporary filter to shorten, and from vivo taking-up when can seriously damage
Blood trouble inside pipe wall.
Summary of the invention
Based on this, it is necessary to provide one kind after implantable intravascular, can not only keep stablize again can recycle when to blood vessel
Inner wall damages lesser filter.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of filter, including the main part with proximal part and distal end, the main part includes being located at the proximal part
And the first filter screen of the neighbouring proximal part and multiple it is connected between distal end and with first filter screen respectively and all positions
First support bar between first filter screen and distal end；The first support bar substantially edge is parallel to the filter
The direction of vertical central axis extends, and the every first support bar is in the plane of vertical central axis for being parallel to the filter
The ratio of the natural length of projected length and the filter is greater than or equal to 1/11, and is less than or equal to 3/4.
The first support bar is in the plane of vertical central axis for being parallel to the filter in one of the embodiments,
Projected length and the filter natural length ratio be 2/7.
The more first support bars are being parallel to the flat of the vertical central axis of the filter in one of the embodiments,
Projected length in face is equal.
The more first support bars are being parallel to the flat of the vertical central axis of the filter in one of the embodiments,
The both ends endpoint of projection in face is mutually overlapped.
One end of the first support bar includes segmental arc in one of the embodiments, the segmental arc and described the
The cable of one filter screen is connected.
The main part further includes the second support bar of the arc-shaped shape of at least one in one of the embodiments, described
Second support bar is connect with first filter screen, and is extended towards the direction close to distal end.
The circumferencial direction of the first support bar and the second support bar in the filter in one of the embodiments,
On be spaced apart.
In one of the embodiments, the filter further include positioned at the distal end and be connected with the main part the
Two filter screens.
At least one end of the first support bar is equipped with a seam in one of the embodiments, and the seam is located at described
Between two cables of first filter screen being connected with the first support bar.
In one of the embodiments, the main part and/or second filter screen by cutting same root NiTi pipe and
At；The first support bar is greater than first filter screen and/or second mistake along the width of the circumferential direction of the filter
Width of the cable of strainer along the circumferential direction of the filter.
The filter further includes recovering hook in one of the embodiments, and the recovering hook is set to the remote of the filter
Heart end or proximal part；The recovering hook is with the tubular structure of an opening, and the opening direction of the recovering hook is along the filter
Radial direction extend outwardly and be biased to the main part；The opening of the recovering hook is perpendicular to the width on the opening direction
Degree is greater than or equal to the 1/5 of the tubular structure outer diameter of the recovering hook, and the opening of the recovering hook is perpendicular to the filter
Depth in longitudinal center's axis direction is less than or equal to the 19/20 of the tubular structure outer diameter of the recovering hook.
Fixed anchor is provided in first support bar described at least one in one of the embodiments, the fixed anchor
One end is fixed in the first support bar, and the other end of the fixed anchor extends and hangs to the direction far from the recovering hook
It is empty；Angle between the fixed anchor and the first support bar is less than 90 °, and the free end of the fixed anchor is to described first
The distance of strut is less than or equal to 3mm.
In the present invention, when the filter is implanted into human vas, and in the blood vessel after Spontaneous release, the multiple first
Strut is used to support vascular wall, when projection of the first support bar in the plane of vertical central axis for being parallel to the filter
The ratio of the natural length of length and the filter is greater than or equal to 1/11, and when being less than or equal to 3/4, the filter can be steady
Surely, it is safely placed in blood vessel, and smaller to the damage of blood vessel when filter recycling.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 a- Fig. 1 b is the overall structure diagram of the filter of the embodiment of the present invention 1, and the filter includes main part, institute
The support component that main part includes the first filter screen, the second filter screen and connection first filter screen and the second filter screen is stated,
The support component includes multiple first support bars；Wherein, Fig. 1 a is main view, and Fig. 1 b is perspective view；
Fig. 1 c- Fig. 1 d is the partial structural diagram of the main part of filter described in Fig. 1 a- Fig. 1 b, wherein based on Fig. 1 c
View, Fig. 1 d are perspective view；
Fig. 2 is the structural schematic diagram that one end of first support bar described in Fig. 1 d offers a seam；
Fig. 3 is the first support bar of support component described in Fig. 1 a- Fig. 1 b in the vertical central axis for being parallel to the filter
Plane in projection and the filter natural length schematic diagram；
Fig. 4 is the structural schematic diagram of the recovering hook of filter described in Fig. 1 a- Fig. 1 b；
Fig. 5 is the structural schematic diagram of the fixation anchor of filter described in Fig. 1 a- Fig. 1 b；
Fig. 6 a- Fig. 6 b is the overall structure diagram of the filter of the embodiment of the present invention 2, and the filter includes main part, institute
The support component that main part includes the first filter screen, the second filter screen and connection first filter screen and the second filter screen is stated,
The support component includes multiple support units；Wherein, Fig. 6 a is main view, and Fig. 6 b is perspective view；
Fig. 6 c- Fig. 6 d is the partial structural diagram of the main part of filter described in Fig. 6 a- Fig. 6 b, wherein based on Fig. 6 c
View, Fig. 6 d are perspective view；
Fig. 7 is the overall structure diagram of the filter of the embodiment of the present invention 3.
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
A specific embodiment of the invention.
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.Used term is intended merely to description specific embodiment in the description herein
Purpose, it is not intended that in limitation the present invention.
In filter field, the closer one end of relative heart is known as proximal part after filter is implanted, and relative heart is farther out
One end be known as distal end.
Filter of the invention captures the thrombus in lumen of vessels for being implanted into human vas, and the filter includes a tool
There is the main part of proximal part and distal end, the main part includes between the proximal part and the distal end and adjacent to institute
State the first filter screen of proximal part and be connected with first filter screen and be located at first filter screen and the distal end it
Between support component.After the filter discharges in the blood vessel, first filter screen is used to filter the thrombus in blood vessel, described
Support component is used to support vascular wall.
First filter screen is to combine the reticular structure formed by a plurality of cable, and every cable can be linear type net
Line, or be shaped form cable, or part is linear type cable, rest part is shaped form cable.First filter screen
A plurality of cable converges at proximal part.
The support component includes multiple support units, and each support unit is connected with first filter screen, described
Multiple support units include multiple first support bars, and each first support bar is substantially along the longitudinal direction for being parallel to the filter
The direction of central axis extends.The first support bar can be straight bar, can also be the shaft of other shapes, as long as described first
Support rod is roughly parallel to the vertical central axis of the filter.
It is appreciated that can be directly connected to first filter screen when the first support bar is straight bar.It is described
One end of first support bar also may include segmental arc, can be connected between first filter screen by the segmental arc.
The filter under Spontaneous release and without compressive state, the end face of the end face of the proximal part and the distal end it
Between distance be the filter natural length, each first support bar is being parallel to the vertical central axis of the filter
Projection in plane has a length, and the length and the ratio of the natural length of the filter are greater than or equal to 1/11, and small
In or equal to 3/4.
It is appreciated that projection of the multiple first support bar in the plane of vertical central axis for being parallel to the filter
Length can be equal, part is equal or unequal.The multiple first support bar is in the longitudinal direction for being parallel to the filter
One end endpoint of projection in the plane of central axis can be overlapped, partially overlaps or is not overlapped mutually, other end endpoint
It can also overlap, partially overlap or not be overlapped mutually.
It is appreciated that multiple support units of the support component can also include at least one second support bar, it is described
Second support bar is segmental arc, and the second support bar is connected with the cable of first filter screen.
It is appreciated that the filter can also include between the distal end and the support component and with the branch
The second connected filter screen of support component.Second filter screen is to combine the reticular structure formed, every cable by a plurality of cable
It can be linear type cable, or be shaped form cable, or part is linear type cable, rest part is shaped form cable, institute
The a plurality of cable for stating the second filter screen converges at the distal end.
When the filter is implanted into human vas, and in the blood vessel after Spontaneous release, multiple supports of the support component
Unit is used to support vascular wall, when projection of the first support bar in the plane of vertical central axis for being parallel to the filter
Length and the ratio of natural length of the filter be greater than or equal to 1/11, and when being less than or equal to 3/4, the filter can be with
Steadily, it is reliably set in blood vessel, prevents filter run-off the straight in the blood vessel, and when filter recycling,
It is smaller to the damage of blood vessel.
Below with reference to the specific embodiment technical solution that present invention be described in more detail.
Embodiment 1
The main part of filter uses outer diameter for the cutting of the NiTi pipe of 0.2-4mm, is formed.It is appreciated that filter can also
The titanium-nickel wire or width for being 0.05-0.8mm by outer diameter are 0.05-0.5mm, and the NiTi bandlet of a length of 0.15-1mm is by weaving, determining
Type forms.The filter has super-elasticity and self-expanding characteristic.
Fig. 1 a and Fig. 1 b is please referred to, filter 100 includes main part 10, and main part 10 has proximal part 101 and distal end
102, main part 10 includes between proximal part 101 and distal end 102 and the first filter screen 11 of neighbouring proximal part 101, adjacent
Second filter screen 12 of nearly distal end 102 and the support component 13 between the first, second filter screen 11,12.When filter 100
In the blood vessel after Spontaneous release, the first filter screen 11 and the second filter screen 12 are used to filter the thrombus in blood vessel；Support component 13
Be used to support vascular wall, make filter 100 discharge after can steadily, be securely positioned in blood vessel, prevent filter 100 from sending out in the blood vessel
Raw inclination.
Please refer to Fig. 1 c and Fig. 1 d, the first filter screen 11 is by a plurality of first cable 111 and a plurality of second cable 112
Combine the reticular structure formed.A plurality of first cable 111 converges at proximal part 101, the separate nearly heart of every first cable 111
End 101 end be connected with one end of adjacent two the second cables 112, i.e., every first cable 111 and be attached thereto two
The second cable of item 112 cooperatively forms Y shape unit, and thus after 100 Spontaneous release of filter, the first filter screen 11 has conical mesh
Structure.The other end of adjacent two the second cables 112 of each adjacent two Y shape unit is connected with support component 13.
Every first cable 111 and the second cable 112 can be all of a straight line type respectively, can also curved type, can also partially be in
Shaped form, rest part are of a straight line type.In the present embodiment, the first filter screen 11 includes the first net of linear type of six equal lengths
The second cable of linear type 112 of line 111 and 12 equal length, per adjacent two the first cables 111 shape at proximal part 101
At angle it is equal.
Second filter screen 12 is to combine the reticular structure formed by a plurality of third cable 121 and a plurality of 4th cable 122.It is more
Third cable 121 converges at distal end 102, and the end of the separate distal end 102 of every third cable 121 is with adjacent two
One end of article the 4th cable 122 is connected, i.e., every third cable 121 cooperatively forms Y with two article of the 4th cable 122 being attached thereto
Shape unit, thus after 100 Spontaneous release of filter, the second filter screen 12 has conical mesh structure.Every the 4th cable 122
The other end is connected with support component 13.
Every third cable 121 and the 4th cable 122 can be all of a straight line type respectively, can also curved type, can also partially be in
Shaped form, rest part are of a straight line type.In the present embodiment, the second filter screen 12 includes the linear type third net of three equal lengths
The 4th cable 122 of linear type of line 121 and six articles of equal lengths is formed at distal end 102 per adjacent two third cables 121
Angle it is equal.
Support component 13 includes multiple first support bars 131, and each first support bar 131 substantially edge is parallel to filter 100
Vertical central axis direction extend.In the present embodiment, the quantity of multiple first support bars 131 is six, and six first
Strut 131 is along circumferencial direction of filter 100 etc. point distribution.
Each first support bar 131 is close to one end of proximal part 101 and each adjacent two Y shape unit of the first filter screen 11
Adjacent two the second cables 112 one end connection.The one end and the second mistake of each first support bar 131 close to distal end 102
One end of every the 4th cable 122 of strainer 12 connects.
Referring to Fig. 2, one end of the close proximal part 101 of first support bar 131, which can also open up one, stitches 1311, first
Adjacent two the second cables 112 of the two neighboring Y shape unit of filter screen 11 are connect with the two sides of seam 1311 respectively, that is, stitch 1311
Between two the second cables 112 being connected with one end of first support bar 131.It is appreciated that first support bar 131 is leaned on
One end of nearly distal end 102 can also open up a seam, and adjacent two article the 4th of the two neighboring Y shape unit of the second filter screen 12
Cable 122 is connected with the two sides of the seam respectively.
Referring to Fig. 3, it is appreciated that when first support bar 131 be straight bar when, can be with the second cable 112 and the 4th
Cable 122 is directly connected to.It, can be with the second cable 112 and/or the 4th when one end of first support bar 131 includes segmental arc
It is connected between cable 122 by the segmental arc, and the second cable 112 and/or the 4th cable 122 and the tangent connection of the segmental arc.
Please continue to refer to Fig. 3, filter 100 is under Spontaneous release and without compressive state, the end face of proximal part 101 and distal end
The distance between 102 end face is the natural length L of filter 100.It is appreciated that when first support bar 131 is straight bar,
The length of projection in the plane of vertical central axis for being parallel to filter 100 be equal to 131 both ends of first support bar straight line away from
From；When first support bar 131 includes the end with segmental arc, in the plane for the vertical central axis for being parallel to filter 100
The length of interior projection be first support bar 131 along the vertical central axis for being parallel to filter 100 direction extend after with the second net
The other end of intersection point and first support bar 131 of the line 112 after extending with the segmental arc direction tangential is in the manner aforesaid with the 4th
The distance between the intersection point of cable 122.
In the present embodiment, projection of each first support bar 131 in the plane of vertical central axis for being parallel to filter 100
Length be 15.7mm, the natural length L of filter 100 is 55mm, i.e., each first support bar 131 is being parallel to filter 100
Vertical central axis plane in the length of projection and the ratio of natural length L of filter 100 be each about 2/7, and six
The both ends endpoint of projection of the first support bar 131 in the plane of vertical central axis for being parallel to filter 100 is mutually overlapped.
Filter 100 is detected using in delivery sheath percutaneous puncture femoral vein implantation inferior caval vein by X-ray developing apparatus
Filter 100 does not generate inclination, displacement or overturning after being implanted into inferior caval vein out；Filter 100 takes out after being implanted into 14 days, patient
Do not occur the malaise symptoms such as pectoralgia, i.e., it is smaller to the damage of blood vessel when filter 100 takes out.
It is appreciated that when filter 100 uses outer diameter as the cutting of the NiTi pipe of d, sizing preparation, i.e., on the NiTi pipe
Cutting forms a plurality of first cable 111 of the first filter screen 11 and a plurality of third net of the second cable 112 and the second filter screen 12
When the first support bar 131 of line 121 and the 4th cable 122 and support component 13, and first support bar 131 is along filter 100
The width of circumferential direction is greater than the first cable 111, the second cable 112, third cable 121 or the 4th cable 122 along filter 100
The width of circumferential direction.To which after filter 100 discharges in the blood vessel, first support bar 131 has vascular wall more stable
Support force.
It is appreciated that filter 100 can also using other elastic materials, stainless steel wire, cobalt-chromium-nickel-molybdenum-ferroalloy,
Cobalt-chromium alloy, polymer can be formed by any other suitable material with self-expanding.
Please continue to refer to Fig. 1 a and Fig. 1 b, filter 100 can also include the recovering hook 103 for being set to 10 one end of main part.
In the present embodiment, recovering hook 103 is set at the distal end 102 of main part 10, can will be in implantable intravascular using recovering hook 103
Filter 100 be recycled to from blood vessel in vitro.It is appreciated that the proximal part 101 in main part 10 also can be set in recovering hook 103
Place, it is only necessary to which the recyclable device for recycling filter 100 connects recovering hook 103 from proximal part 100, and will filter from proximal part 101
Device 100 recycles and retracts blood vessel.
Please refer to Fig. 4, when filter 100 use outer diameter for the cutting of the NiTi pipe of d, be formed when, recovering hook 103 with
The main part of filter 100 is integrally formed, i.e., recovering hook 103 is directly open in the end cut one of the NiTi pipe.Work as filter
Device 100 using titanium-nickel wire or NiTi bandlet by braiding, be formed when, recovering hook 103 can be to have opening and outer for one
Diameter is that the NiTi pipe of d is formed by connecting with the proximal part of the main part of the filter or the enclosed construction of distal end.
The opening direction of recovering hook 103 extends outwardly along the radial direction of filter 100 and is biased to main part 10, recovering hook
103 opening has one perpendicular to the width H on the opening direction, and the opening of recovering hook 103 also has one perpendicular to filter
Depth S in 100 longitudinal center's axis direction.In the present embodiment, the width H of the opening of recovering hook 103 is greater than or equal to described
The 1/5 of the outside diameter d of NiTi pipe, so that recyclable device arrests recovering hook 103 in which can be convenient.The depth S of the opening of recovering hook 103
Less than or equal to the 19/20 of the outside diameter d of the NiTi pipe, thus after the recyclable device arrests recovering hook 103, the recycling
Recovering hook 103 can be drawn in recycling sheath by device.
Referring to Fig. 5, filter 100 further includes fixed anchor 104, fixed anchor 104 and the vertical central axis of filter 100 are at an acute angle
Ground is set in the first support bar 131 of support component 13.In the form of sheets, one end of fixed anchor 104 is fixed on first to fixed anchor 104
On support rod 131, the other end of fixed anchor 104 is free end, and the free end of fixed anchor 104 is to the side far from recovering hook 103
To extend and it is hanging.The angle α of fixed anchor 104 and first support bar 131 is less than 90 °, the free end of fixed anchor 104 to first
The distance h of support rod 131 is less than or equal to 3mm.After 100 Spontaneous release in the blood vessels of filter, first of support component 13
Strut 131 supports vascular wall, and fixed anchor 104 is pierced into vascular wall, further provides and be reliably fixed for filter 100, prevent from filtering
Device 100 generates displacement in the blood vessel.
Embodiment 2
Please refer to Fig. 6 a and Fig. 6 b, the structure of the filter 100 of the structure and above-described embodiment 1 of the filter 200 of the present embodiment
Roughly the same, filter 200 includes the first filter screen between proximal part 201 and distal end 202 and adjacent to proximal part 201
21, the second filter screen 22 of neighbouring distal end 202 and the support component 23 between the first, second filter screen 21,22.Difference
Place is that the structure of support component 23 is different from the structure of support component 13 of embodiment 1.
Support component 23 includes multiple support units, and the multiple support unit includes multiple first support bars 231 and extremely
A few second support bar 232.The structure of first support bar 231 is identical as the structure of first support bar 131 in embodiment 1,
First support bar 231 substantially extends along the direction for the vertical central axis for being parallel to filter 200；Second support bar 232 is segmental arc,
It is also used for the first filter screen 21 of connection and the second filter screen 22.
Please refer to Fig. 6 c, Fig. 6 d, adjacent two the second cables 212 of the two neighboring Y structure of the first filter screen 21
One end and one end of the 4th cable 222 of the Y shape unit of the second filter screen 22 be attached by second support bar 232.
In the present embodiment, the quantity of multiple support units of support component 23 is six, wherein the number of first support bar 231
Amount is three, and the quantity of second support bar 232 is three.And three first support bars 231 and three second support bars 232 are being filtered
It is spaced apart on the circumferencial direction of device 200.It is appreciated that multiple first support bars 231 and at least one second support bar 232
It can not be spaced apart, i.e. uneven distribution.
Filter 200 is under Spontaneous release and without compressive state, between the end face of proximal part 201 and the end face of distal end 202
Distance be filter 200 natural length L.In the present embodiment, each first support bar 231 is in the longitudinal direction for being parallel to filter 200
The length of projection in the plane of central axis is 15.7mm, and the natural length L of filter 200 is 55mm, i.e., each first support bar
The ratio of the natural length L of the length and filter 200 of 131 projection in the plane of vertical central axis for being parallel to filter 200
It is each about the two of projection of 2/7, and three first support bars 231 in the plane of vertical central axis for being parallel to filter 200
End endpoint is mutually overlapped.
Filter 200 is detected using in delivery sheath percutaneous puncture femoral vein implantation inferior caval vein by X-ray developing apparatus
Filter 200 does not generate inclination, displacement or overturning after being implanted into inferior caval vein out；Filter 200 takes out after being implanted into 14 days, patient
Do not occur the malaise symptoms such as pectoralgia, i.e., it is smaller to the damage of blood vessel when filter 200 takes out.
Embodiment 3
Referring to Fig. 7, the structure of the filter 300 of embodiment 3 is identical as the structure division of filter 100 of embodiment 1, difference
Place is, the main body 30 of filter 300 only include between proximal part 301 and distal end 302 and neighbouring proximal part 301 the
The support component 33 of one filter screen 31 and the first filter screen 31 of connection and neighbouring distal end 302, filter 300 does not include described second
Filter screen, i.e. filter 300 are unidirectional open architecture.
In the present embodiment, the quantity of multiple support units of support component 33 is six, and six support units are first
Support rod 331, each first support bar 331 substantially extend along the direction for the vertical central axis for being parallel to filter 300.Each first
The length of projection of the support rod 331 in the plane of vertical central axis for being parallel to filter 300 is 15.7mm, Spontaneous release and
Without under compressive state, the natural length L of filter 300 is 55mm, i.e., each first support bar 331 is being parallel to the vertical of filter 300
The ratio of the natural length L of the length and filter 300 of projection into the plane of central axis is each about 2/7, and six first
The both ends endpoint of projection of the support rod 331 in the plane of vertical central axis for being parallel to filter 300 is mutually overlapped.
Filter 300 is detected using in delivery sheath percutaneous puncture femoral vein implantation inferior caval vein by X-ray developing apparatus
Filter 300 does not generate inclination, displacement or overturning after being implanted into inferior caval vein out；Filter 300 takes out after being implanted into 14 days, patient
Do not occur the malaise symptoms such as pectoralgia, i.e., it is smaller to the damage of blood vessel when filter 300 takes out.
Embodiment 4
The structure of the filter of embodiment 4 is roughly the same with the structure of filter 100 of embodiment 1, and the filter includes main body
Portion, the main part include the first, second filter screen and the support component between the first, second filter screen, the support
Component includes six support units, and six support units are first support bar.
Difference place is that the filter of the present embodiment is under Spontaneous release and without compressive state, each first support
The length of projection of the bar in the plane of vertical central axis for being parallel to the filter is 5mm, and the natural length L of the filter is
55mm, the i.e. length of projection of the every first support bar in the plane of vertical central axis for being parallel to the filter and institute
The ratio for stating the natural length of filter is each about 1/11.Six first support bars are in the longitudinal center for being parallel to the filter
One end endpoint of projection in the plane of axis is not overlapped and/or the other end endpoint of the projection is not overlapped.
The filter is examined using in delivery sheath percutaneous puncture femoral vein implantation inferior caval vein by X-ray developing apparatus
The filter is measured after being implanted into inferior caval vein, does not generate inclination, displacement or overturning；The filter takes out after being implanted into 14 days,
Patient does not occur the malaise symptoms such as pectoralgia, i.e., smaller to the damage of blood vessel when the filter takes out.
Embodiment 5
The structure of the filter of embodiment 5 is roughly the same with the structure of filter 200 of embodiment 2, and the filter includes main body
Portion, the main part include the first, second filter screen and the support component between the first, second filter screen, the support
Component includes six support units, and six support units include three first support bars and three second support bars.
Difference place is that the filter of the present embodiment is under Spontaneous release and without compressive state, each first support
The length of projection of the bar in the plane of vertical central axis for being parallel to the filter is 44.3mm, the natural length of the filter
L is 55mm, i.e., the length of projection of each first support bar in the plane of vertical central axis for being parallel to the filter
3/4 is each about with the ratio of the natural length of the filter.Three first support bars are in the longitudinal direction for being parallel to the filter
One end endpoint of projection in the plane of central axis is not overlapped and/or the other end endpoint of the projection is not overlapped.
The filter is examined using in delivery sheath percutaneous puncture femoral vein implantation inferior caval vein by X-ray developing apparatus
The filter is measured after being implanted into inferior caval vein, does not generate inclination, displacement or overturning；The filter takes out after being implanted into 14 days,
Patient does not occur the malaise symptoms such as pectoralgia, i.e., smaller to the damage of blood vessel when the filter takes out.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (11)
1. a kind of filter, including the main part with proximal part and distal end, the main part include positioned at the proximal part and
First filter screen of the neighbouring proximal part and multiple it are connected between distal end and with first filter screen respectively and are all located at
First support bar between first filter screen and distal end；The first support bar substantially edge is parallel to the vertical of the filter
Extend to the direction of central axis, which is characterized in that each first support bar is in the vertical central axis for being parallel to the filter
Plane in projected length and the filter natural length ratio be greater than or equal to 1/11, and be less than or equal to 3/4；Institute
The one end for stating first support bar includes segmental arc, and the filter further includes recovering hook, and the recovering hook is set to the filter
Distal end or proximal part；The segmental arc is connected with the cable of first filter screen.
2. filter according to claim 1, which is characterized in that the first support bar is in the longitudinal direction for being parallel to the filter
The ratio of the natural length of projected length and the filter in the plane of central axis is 2/7.
3. filter according to claim 1, which is characterized in that the multiple first support bar is in the longitudinal direction of the filter
Projected length in mandrel is equal.
4. filter according to claim 3, which is characterized in that the multiple first support bar is in the longitudinal direction of the filter
One end endpoint of projection in mandrel overlaps, and other end endpoint also overlaps.
5. filter according to claim 1, which is characterized in that the main part further includes the of at least one arc-shaped shape
Two support rods, the second support bar are connect with first filter screen, and are extended towards the direction close to distal end.
6. filter according to claim 5, which is characterized in that the first support bar and the second support bar are described
It is spaced apart on the circumferencial direction of filter.
7. filter according to claim 1, which is characterized in that the filter further include positioned at the distal end and with it is described
The second connected filter screen of main part.
8. filter according to any one of claim 1 to 7, which is characterized in that at least one end of the first support bar
It is stitched equipped with one, the seam is located between two cables of first filter screen being connected with the first support bar.
9. filter according to claim 7, which is characterized in that the main part and/or second filter screen are by cutting
Same root NiTi pipe forms；The first support bar is greater than first filter screen along the width of the circumferential direction of the filter
And/or the width of circumferential direction of the cable of second filter screen along the filter.
10. filter according to claim 9, which is characterized in that the recovering hook is the tubular structure with an opening, institute
The opening direction for stating recovering hook extends outwardly along the radial direction of the filter and is biased to the main part；The recovering hook is opened
Mouth is the 1/5 of the tubular structure outer diameter for being greater than or equal to the recovering hook perpendicular to the width on the opening direction, described time
Receive the tubulose that depth of the opening of hook in longitudinal center's axis direction perpendicular to the filter is less than or equal to the recovering hook
The 19/20 of structure outer diameter.
11. filter according to claim 10, which is characterized in that be provided with fixation at least one described first support bar
One end of anchor, the fixed anchor is fixed in the first support bar, and the other end of the fixed anchor is to far from the recovering hook
Direction extend and it is hanging；Angle between the fixed anchor and the first support bar less than 90 °, the fixed anchor it is hanging
The distance to the first support bar is held to be less than or equal to 3mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510862958.6A CN106806037B (en) | 2015-11-30 | 2015-11-30 | Filter |
| PCT/CN2016/085655 WO2017092278A1 (en) | 2015-11-30 | 2016-06-14 | Filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510862958.6A CN106806037B (en) | 2015-11-30 | 2015-11-30 | Filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106806037A CN106806037A (en) | 2017-06-09 |
| CN106806037B true CN106806037B (en) | 2019-05-31 |
Family
ID=58796024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510862958.6A Active CN106806037B (en) | 2015-11-30 | 2015-11-30 | Filter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106806037B (en) |
| WO (1) | WO2017092278A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109394379B (en) * | 2017-08-18 | 2024-09-20 | 上海蓝脉医疗科技有限公司 | Filter device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5938683A (en) * | 1994-01-10 | 1999-08-17 | Bentex Trading S.A. | Endovascular filter with flat fixing branches |
| CN1739466A (en) * | 2004-08-28 | 2006-03-01 | 深圳市先健科技股份有限公司 | Thrombus filter of controllable release and preparation method thereof |
| CN101147705A (en) * | 2006-09-18 | 2008-03-26 | 深圳市先健科技股份有限公司 | Controllable released biological ceramic thrombus filter and manufacturing method thereof |
| CN204709071U (en) * | 2014-12-30 | 2015-10-21 | 先健科技(深圳)有限公司 | Filter |
| CN205494080U (en) * | 2015-11-30 | 2016-08-24 | 先健科技(深圳)有限公司 | Filter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2569770Y (en) * | 2002-09-28 | 2003-09-03 | 维科医疗器械(苏州)有限公司 | Recoverable thrombus filter |
| US20050080449A1 (en) * | 2002-10-31 | 2005-04-14 | Mulder Rudolf T. | Safety cartridge for retrievable medical filter |
| 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 |
| CN104644287A (en) * | 2015-03-02 | 2015-05-27 | 广州启骏生物科技有限公司 | Inferior vena cava filter and preparation method thereof |
| 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 |
-
2015
- 2015-11-30 CN CN201510862958.6A patent/CN106806037B/en active Active
-
2016
- 2016-06-14 WO PCT/CN2016/085655 patent/WO2017092278A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5938683A (en) * | 1994-01-10 | 1999-08-17 | Bentex Trading S.A. | Endovascular filter with flat fixing branches |
| CN1739466A (en) * | 2004-08-28 | 2006-03-01 | 深圳市先健科技股份有限公司 | Thrombus filter of controllable release and preparation method thereof |
| CN101147705A (en) * | 2006-09-18 | 2008-03-26 | 深圳市先健科技股份有限公司 | Controllable released biological ceramic thrombus filter and manufacturing method thereof |
| CN204709071U (en) * | 2014-12-30 | 2015-10-21 | 先健科技(深圳)有限公司 | Filter |
| CN205494080U (en) * | 2015-11-30 | 2016-08-24 | 先健科技(深圳)有限公司 | Filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106806037A (en) | 2017-06-09 |
| WO2017092278A1 (en) | 2017-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109069253B (en) | Inferior vena cava filter | |
| US20140031857A1 (en) | Embolic protection filter for transcatheter aortic valve replacement and uses thereof | |
| JP2018502690A (en) | Intravascular device and delivery system and use thereof | |
| WO2008034315A1 (en) | Double deck venous fileter | |
| CN106913392B (en) | Filter | |
| CN211325886U (en) | Thrombus separation device | |
| CN106308974A (en) | Filter | |
| CN105963047A (en) | Novel retrievable vena cava thrombus multi-filtering device | |
| CN105662646A (en) | Filter | |
| CN120267356A (en) | Thrombectomy stent | |
| CN109793600A (en) | A stent for near bifurcation site lesions | |
| CN105213065A (en) | Filter | |
| CN205494080U (en) | Filter | |
| CN107280807A (en) | A kind of semiclosed dual-gripper recoverable version vena cava filter | |
| CN109394379B (en) | Filter device | |
| CN206630733U (en) | Filter | |
| CN106806037B (en) | Filter | |
| CN112022426A (en) | Embolic protection device | |
| CN205494082U (en) | Filter | |
| CN109953838B (en) | Filter device | |
| CN205494081U (en) | Filter | |
| CN205494083U (en) | Filter | |
| CN105596115B (en) | Vena cava filter | |
| CN205758765U (en) | A kind of Weaving type vena cava filter | |
| CN205198208U (en) | Filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |