CN209107678U - Blood vessel covered stent - Google Patents
Blood vessel covered stent Download PDFInfo
- Publication number
- CN209107678U CN209107678U CN201820818684.XU CN201820818684U CN209107678U CN 209107678 U CN209107678 U CN 209107678U CN 201820818684 U CN201820818684 U CN 201820818684U CN 209107678 U CN209107678 U CN 209107678U
- Authority
- CN
- China
- Prior art keywords
- blood vessel
- support frame
- covered stent
- tubular support
- vessel covered
- 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
Landscapes
- Prostheses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The utility model embodiment discloses a kind of blood vessel covered stent, comprising: tubular support frame is connected as a whole and hollow formation proximally to the axial passage of distal end, and the tubular support frame can be bent flexible in the axial direction；Secluding film is covered on the outer surface of at least partly described tubular support frame, has multiple groups tie point on the secluding film, and the secluding film is connect at tie point with the tubular support frame；Under release conditions, the completely axial length of the secluding film between the two adjacent groups tie point is greater than the axial length of the tubular support frame between the two adjacent groups tie point.Using the utility model, have the advantages that blood vessel covered stent is made to take into account radial support power and whole flexibility.
Description
Technical field
The utility model relates to the field of medical instrument technology, in particular to a kind of blood vessel covered stent.
Background technique
Existing common vascular diseases generally comprise aortic aneurysm, dissection of aorta etc..
Aortic aneurysm refers to that aorta wall is local or diffused abnormal dilatation, oppresses peripheral organs and causes symptom, tumor
Shape is broken into its main hazard.Aortic aneurysm causes intravascular side pressure to be increased, therefore expands in progressive, if long-run development, finally
After all it ruptures, a possibility that knurl is bigger, rupture is bigger.
Human aortic blood vessel is made of 3-tier architecture, and inner membrance, middle film and outer membrane, 3-tier architecture fit closely, common to carry
Blood flow passes through.And dissection of aorta refers to due to inner membrance local laceration, is impacted by strong blood, inner membrance is gradually shelled
From, extension, form true, false two chamber in intra-arterial.Dissection of aorta is the cardiovascular disease for seriously threatening human life and health, always
Body disease incidence is 5/,100,000 or so, and case fatality rate is about 1.5/10 ten thousand.
In order to be treated to vascular diseases such as aortic aneurysm or dissection of aorta, now begin to former using inner cavity insulation
The Micro trauma interventional therapeutic technique of reason treats vascular diseases, specially using blood vessel covered stent isolation blood and actively
Arteries and veins tumor or dissection of aorta.Blood vessel covered stent is mainly (poly- to benzene two by wire and the PET being covered on it currently on the market
Formic acid glycol ester resin) secluding films such as film or ePTFE (polytetrafluoroethylene (PTFE)) film composition, cylindrical stent is made in more one metal wires
Skeleton is separated from each other between wire and wire, covers secluding film thereon.With the thinner transportation system of caliber, shape will be compressed
The blood vessel covered stent of state is sent into human body along the seal wire guidance being implanted into advance and is sent to lesion blood under the assistance of toning system
It is accurately discharged behind the position of pipe, is covered on lesion vessels section, completely cut off lesion and form new channel of blood flow, to reach healing blood
The purpose of pipe disease.
All using complete hot pressing or suture between the secluding film and support skeleton of currently marketed blood vessel covered stent
Connection type, wire provide radial support power, adjust the distance between adjacent wire, utilize the flexibility of secluding film itself
Matter adjusts the whole flexibility of blood vessel covered stent, however, if adjacent wire apart from too small, because to be isolated film complete for wire
It limits, it is poor that support skeleton is bent flexibility；If adjacent wire, apart from excessive, support skeleton flexibility improves, but blood vessel
Overlay film frame overall radial support force can be insufficient, and existing blood vessel covered stent flexibility and radial support power cannot be taken into account.
Utility model content
The technical problem to be solved by the embodiment of the utility model is, providing a kind of blood vessel covered stent.It can make blood vessel
Overlay film frame takes into account radial support power and whole flexibility.
In order to solve the above-mentioned technical problem, the utility model embodiment provides a kind of blood vessel covered stent, comprising:
Tubular support frame is connected as a whole and hollow formation proximally to the axial passage of distal end, the pipe
Shape support frame can be bent flexible in the axial direction；
Secluding film is covered on the outer surface of at least partly described tubular support frame, has multiple groups on the secluding film
Tie point, the secluding film are connect at tie point with the tubular support frame；
Under release conditions, the completely axial length of the secluding film between the two adjacent groups tie point is greater than described adjacent two
The axial length of tubular support frame between group tie point.
In an embodiment of the utility model, the secluding film includes linkage section and telescopic segment, the linkage section be with
The isolation membrane part of the tie point, isolation membrane part of the telescopic segment between two adjacent groups tie point.
In an embodiment of the utility model, the axial length of the linkage section is 2-20mm.
In an embodiment of the utility model, the natural axial distance of the telescopic segment is 10-60mm.
In an embodiment of the utility model, the linkage section is non-telescoping secluding film, and the telescopic segment is scalable
Secluding film；Or the linkage section and telescopic segment are scalable secluding film.
In an embodiment of the utility model, the completely axial length of the telescopic segment and the telescopic segment are in release shape
The range of the ratio of its natural axial distance is 1.01:1-1.5:1 when state.
In an embodiment of the utility model, the telescopic segment forms fold in the axial direction.
In an embodiment of the utility model, the telescopic segment is on axial vertical section by multiple wrinkling element repeated arrangements
Perhaps being arranged successively and forming the wrinkling element is in one of inverted V type, inverted U, Ω type, S type, c-type or at least two
Combination.
In an embodiment of the utility model, the secluding film exists when the tubular support frame radial compression is to internal diameter minimum
As tubular support frame elongation is straightened on axial.
In an embodiment of the utility model, the secluding film is nylon secluding film, terylene secluding film or polytetrafluoroethyl-ne
Alkene secluding film.
In an embodiment of the utility model, the secluding film is at least straight stretchable film in telescopic segment.
In an embodiment of the utility model, the tubular support frame is surrounded by network-like structure.
In an embodiment of the utility model, the network-like structure forms by metal wire knitted or passes through metal tube
Cutting is formed.
In an embodiment of the utility model, the tubular support frame is formed by cuts in metallic pipe, the tubular support frame
It is made of multiple open loop units and/or multiple closed-loop elements.
In an embodiment of the utility model, the blood vessel covered stent further includes bare bracket, and the bare bracket is by described
Proximally direction extends to form for the proximal end of tubular support frame.
In an embodiment of the utility model, the blood vessel covered stent further includes hangnail, and the hangnail is arranged in naked branch
On frame outer surface or on the outer surface of tubular support frame proximal end.
In an embodiment of the utility model, the partial outer face of the tubular support frame does not cover the secluding film.
In an embodiment of the utility model, the secluding film covers all the outer surface of the tubular support frame.
In an embodiment of the utility model, the tubular support frame is self-expansion type bracket or balloon-expandable branch
Frame.
In an embodiment of the utility model, the tubular support frame is in hollow cylinder or circular platform type.
In an embodiment of the utility model, at tie point the secluding film and the tubular support frame by suture,
The two is attached by the mode of viscose glue or hot pressing.
In an embodiment of the utility model, the proximal end of the blood vessel covered stent or distal end setting developing apparatus.
Implement the utility model embodiment, has the following beneficial effects:
Due to blood vessel covered stent, comprising: tubular support frame is connected as a whole and hollow formation and proximally arrives
The axial passage of distal end, the tubular support frame can be bent flexible in the axial direction；Secluding film is covered on at least partly described pipe
On the outer surface of shape support frame, on the secluding film have multiple groups tie point, the secluding film at tie point with the tubulose
Support frame connection；Under release conditions, the completely axial length of the secluding film between the two adjacent groups tie point is greater than the phase
The axial length of tubular support frame between adjacent two groups of tie points.To when tubular support frame stretching, extension, since two adjacent groups connect
The axial direction that the completely axial length of secluding film between contact is greater than the tubular support frame between the two adjacent groups tie point is long
Degree, so that secluding film is easy to be elongated, secluding film will not stop the stretching, extension of tubular support frame, the blood vessel covered stent it is curved
Bent flexibility is preferable；Moreover, because tubular support frame is connected as an entirety, to have preferable radial support power.To
The blood vessel covered stent of the utility model embodiment had both had preferable flexibility, it may have preferable radial support power.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is schematic diagram when the utility model first embodiment blood vessel covered stent is in release conditions；
Fig. 2 be another schematic diagram when the utility model first embodiment blood vessel covered stent is in release conditions (wherein
Fig. 2 right half part eliminates secluding film to clearly show that)；
Fig. 3 is schematic diagram when the utility model first embodiment tubular support frame is in release conditions；
Fig. 4 is schematic diagram when the utility model first embodiment secluding film is in release conditions；
Fig. 5 is that the utility model first embodiment secluding film is shown by when being deployed into longest axial length after axial tension
It is intended to；
Fig. 6 is that (wherein Fig. 6 right half part is in order to clear for the schematic diagram of the utility model second embodiment blood vessel covered stent
Display eliminates secluding film)；
Fig. 7 is that (wherein Fig. 7 right half part is in order to clear for the schematic diagram of the utility model 3rd embodiment blood vessel covered stent
Display eliminates secluding film)；
Fig. 8 is that (wherein Fig. 8 right half part is in order to clear for the schematic diagram of the utility model fourth embodiment blood vessel covered stent
Display eliminates secluding film)；
Fig. 9 is that (wherein Fig. 9 right half part is in order to clear for the schematic diagram of the 5th embodiment blood vessel covered stent of the utility model
Display eliminates secluding film)；
Shown by reference numeral:
110,210- tubular support frame；111,211- closed-loop element；112- mesh；113- wire；120,520- completely cuts off
Film；121- tie point；122- wrinkling element；123- linkage section；124- telescopic segment；213- open loop unit；330- bare bracket；440-
Hangnail.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
The term " includes " and " having " and their any changes occurred in present specification, claims and attached drawing
Shape, it is intended that cover and non-exclusive include.Such as contain the process, method of a series of steps or units, system, product or
Equipment is not limited to listed step or unit, but optionally further comprising the step of not listing or unit or optional
Ground further includes the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " the
Two " and " third " etc. are and to be not intended to describe specific sequence for distinguishing different objects.
In order to describe clearly, the one end that will be close to cardiac position below is referred to as proximal end, and the one end that will be far from cardiac position claims
Make distal end.
First embodiment
The utility model embodiment provides a kind of blood vessel covered stent, referring to Figure 1-Fig. 5, the blood vessel covered stent packet
Include tubular support frame 110 and secluding film 120.
- Fig. 3 referring to Figure 1, in the present embodiment, the tubular support frame 110 are connected as an entirety namely the pipe
Shape support frame 110 is not that separation is independent, and there is no independent part, the various pieces in tubular support frame 110 are mutually connected
System, it is described when user is in the proximal end of tubular support frame 110 or distal end stretching tubular support frame 110 (other end is fixed)
Tubular support frame 110 is whole to be stretched namely elongation of 110 various pieces of tubular support frame to tubular support frame 110 together
It contributes, when proximal end or distal compaction tubular support frame 110 of the user in tubular support frame 110, (other end is solid
It is fixed), 110 entirety of tubular support frame is compressed namely 110 various pieces of tubular support frame are to tubular support frame 110
Shortening is contributed.
In the present embodiment, the axial passage that distal end is proximally arrived in the hollow formation of the tubular support frame 110 (is not shown in figure
Show), the axial passage is similar to the channel of blood flow in human vas.When the blood vessel covered stent is located at Shi Suoshu in blood vessel
Axial passage is for conveying blood.The tubular support frame 110 can be bent flexible in the axial direction.
Specifically, in the present embodiment, the tubular support frame 110 is made of shape memory alloy material, the shape
Shape memory alloys are, for example, Nitinol, corronil, albronze, ormolu etc., when the tubular support frame 110 is placed
When in the blood vessel, the tubular support frame 110 can be bent flexible with the bending of blood vessel.Specifically, working as the tubulose branch
When support 110 is bent, the inside corresponding region of the tubular support frame 110 can be extruded compression, the tubular support frame 110
Outside corresponding region can be stretched.In addition, the tubular support frame can also be by not in the other embodiments of the utility model
Rust steel, cochrome or the good material of other biological compatibility are made, and the tubular support frame radial support power is preferable at this time, and
Tubular support frame can also be bent flexible with the bending of blood vessel.
Referring to Figure 1, Fig. 2, Fig. 4, Fig. 5, in the present embodiment, the secluding film 120 cover at least partly described tubulose
The outer surface of support frame 110, the outer surface of the tubular support frame 110 is completely covered in the secluding film 120 in the present embodiment.
Certainly, in the other embodiments of the utility model, the secluding film can be with tubular support frame described in endless all standing.At this
In embodiment, there is multiple groups tie point 121 on the secluding film 120, distal end proximally arrived in figure, 5 groups of tie points 121 are set,
Can be between same group of adjacent attachment points 121 it is intermittent be also possible to continuous, the secluding film 120 is at tie point 121
It being connect with the tubular support frame 110, the secluding film 120 is not connect in other positions with the tubular support frame 110, thus
The tie point 121 of secluding film 120 and the position of tubular support frame 110 are relatively-stationary.In the present embodiment, connect described in every group
Contact 121 is located on the circumference of the same circle.But the utility model is without being limited thereto, in the other embodiments of the utility model,
Tie point described in every group can be on the same elliptical circumference etc..Secluding film 120 is limited as the prior art in order to prevent
The axially extending property of said tubular support frame 110 processed, in the present embodiment, under blood vessel covered stent release conditions, the phase
The completely axial length of secluding film 120 between adjacent two groups of tie points 121 is greater than the pipe between the two adjacent groups tie point 121
The axial length of shape support frame 110, herein, blood vessel covered stent release conditions refer to when blood vessel covered stent is in nature
State, is not affected by external force at this time, and the completely axial length of the secluding film 120 refers to secluding film itself by axial tension
Extensible longest axial length (referring to Fig. 5) afterwards, when secluding film 120 itself is stretchable with elasticity, the secluding film
120 completely axial length includes the increased axial length of elastic elongation, when secluding film 120 itself is stretchable without elasticity
When, the completely axial length of the secluding film 120 is the axial length after secluding film is fully deployed；The axis of tubular support frame 110
Natural axial length when to length being non-stress under release conditions, thus secluding film 120 can with the bending of support frame and
It stretches, will not fetter or limit the bending of support frame.Corresponding, the natural axial distance of secluding film 120 refers to release shape
Axial distance under state when non-stress between proximal end and distal end.To which when tubular support frame 110 stretches, secluding film 120 passes through
Tie point will receive pulling force, since the completely axial length of the secluding film 120 between two adjacent groups tie point 121 is greater than the phase
The axial length of tubular support frame 110 between adjacent two groups of tie points 121, so that secluding film 120 is easy to be elongated, secluding film
120 will not stop the stretching, extension of tubular support frame 110, thus, the bending flexibility of the blood vessel covered stent is preferable；Moreover, by
It is connected as an entirety in tubular support frame 110, to have preferable radial support power.To the utility model embodiment
Blood vessel covered stent had both had preferable flexibility, it may have preferable radial support power.
When occurring the vascular diseases such as aneurysm or artery dissection in user's blood vessel, doctor is by above-mentioned blood vessel covered branch
Frame compression is placed in insertion type transportation system, and blood vessel covered stent is sent into specified in blood vessel along the seal wire guidance being implanted into advance
Position (position of vascular lesion), discharges thereafter the blood vessel covered stent, and the blood vessel covered stent expands after release, and
As human vas is bent, the blood vessel covered stent is covered on lesion vessels section, completely cuts off lesion and forms new blood vessel access.
For aneurysm, after losing blood supply, the intracavitary remained blood of tumor gradually forms thrombus and fleshization forms vascular tissue, expansion
The tumor wall of state is shunk due to by negative pressure, is gradually restored to original form, to reach the aneurysmal purpose for the treatment of.For actively
Arteries and veins interlayer, blood vessel covered stent cover Lacuna of Aortic Dissection, and false intracavitary gradually thrombosis is gradually become smaller by negative pressure, thus
Achieve the purpose that treat dissection of aorta.
- Fig. 3 referring to Figure 1, in the present embodiment, the tubular support frame 110 are hollow cylinder, also as cylinder
Shape, certainly, in the other embodiments of the utility model, the tubular support frame can also be other structures, for example, rotary table
Type etc..In the present embodiment, the tubular support frame 110 is surrounded by network-like structure, and centre forms the axial passage, described
Network-like structure is similar to the structure of fishing net, and such structure radial support power is preferable, moreover, when the blood vessel covered stent is bent
When, the secluding film 120 outside tubular support frame 110 will not be extend into axial passage, so that the internal diameter of axial passage will not subtract
The axial passage internal diameter of few namely blood vessel covered stent everywhere is almost the same, when blood flow flows in axial passage, no
Will appear makes blood vessel covered stent bear biggish blood flow impact since secluding film 120 is extend into axial passage, thus picture
The prior art makes blood vessel covered stent bear biggish blood flow surge and blood vessel is caused to cover since channel internal diameter reduces like that
The phenomenon that membrane support shifts will not occur, so that the blood vessel covered stent in the present embodiment is not allowed after being accurately placed inside blood vessel
The blood vessel covered stent treatment vascular diseases effect of easily displacement, the utility model embodiment is preferable.In addition, in the utility model
In other embodiments, the tubular support frame can also be surrounded by frame-like structure, or by network-like structure and frame-like knot
The group of structure is encircled into.
Specifically, the network-like structure includes multiple closed-loop elements 111, the closed-loop element in the present embodiment
111 are successively joined end to end by 4 metal edges forms the diamond shape of closure, the hollow formation mesh 112 of each closed-loop element 111.
In the present embodiment, the line on the opposite vertex of the one pair of them of diamond shape closed-loop element 111 extends towards axial direction, refers to figure
2, in Fig. 3 diamond shape closed-loop element 111 vertex up and down, when tubular support frame 110 stretch when, diamond shape closed-loop element 111 up and down
Vertex is easy to be elongated, and the left and right vertex distance of diamond shape closed-loop element 111 can reduce namely diamond shape closed-loop element 111 is held very much
It is easily crushed, so that the bending flexibility of the tubular support frame 110 is preferable.In the present embodiment, the closed-loop element 111 is
Regular shape, but it is not limited to diamond shape, such as can also be circle, ellipse, convex polygon etc..In the present embodiment, described
Multiple mesh 112, the corresponding hollow mesh 112 of each closed-loop element 111, the mesh 112 are formed on network-like structure
Shape it is corresponding with the shape of the closed-loop element 111.
In the present embodiment, the network-like structure is knitted to form by wire 113, in the present embodiment, the gold
Belonging to silk 113 can be shape memory alloy material, but the utility model is without being limited thereto, in the other embodiments of the utility model,
The wire can also be stainless steel, cochrome or the good material of other biological compatibility.Shape is woven by wire 113
At network-like structure, the wire 113 for weaving can be one and be also possible to multiply, when the wire 113 for being used to weave
When being one, the wire 113 is relatively thicker, and the 110 radial support power of tubular support frame is relatively good at this time, and flexibility is wanted
Somewhat poorer, when the wire 113 for being used to weave includes multiply, per share wire 113 is thinner, is knitted to form at this time
The 110 radial support power of tubular support frame is somewhat poorer, but flexibility is preferable, and certainly, the wire 113 for weaving can also
Partially to use sub-thread, multiply is partially used, radial support power and flexibility can be taken into account at this time, can be changed according to actual needs
Become.In addition, the network-like structure can also be formed by cuts in metallic pipe in the other embodiments of the utility model, tool
Body is to dig up the metal that will be formed at mesh on metal tube.In the present embodiment, the mode that wire 113 weaves, which can be, to twine
Around, knot etc. modes two wires 113 to be linked together.In the present embodiment, the tubular support frame 110 is remembered by shape
Recall alloy to be made, so that the tubular support frame 110 is self-expansion type bracket, namely works as the compressed blood vessel covered stent
After being released, 110 automatic expansion of tubular support frame is opened, and is automatically formed the axial passage, is not needed external force intervention.
Referring to Figure 1, Fig. 2, Fig. 4 and Fig. 5, in the present embodiment, the secluding film 120 include linkage section 123 and stretch
Section 124 is 5 in the quantity of figure middle connecting segment 123, and the quantity of the telescopic segment 124 is 4, certainly, the utility model linkage section and
The quantity of telescopic segment is without being limited thereto.In the present embodiment, the linkage section 123 is secluding film 120 with the tie point
Point, here, the linkage section 123 be it is straight, the linkage section 123 be non-telescoping secluding film.The telescopic segment 124 is
120 part of secluding film between two adjacent groups tie point, namely between adjacent two linkage section 123, the telescopic segment 124 is not
It is straight, 124 dipping and heaving of telescopic segment, the telescopic segment 124 forms fold here, and the telescopic segment 124 is can
Flexible secluding film, certainly, in the other embodiments of the utility model, the telescopic segment can be formed irregularly with dipping and heaving
Shape.In addition, the linkage section can also be scalable secluding film in the other embodiments of the utility model, stretch at this time
Contracting section and linkage section are scalable secluding film, at this time the linkage section also dipping and heaving.In addition, the utility model other
In embodiment, the secluding film at least telescopic segment be straight stretchable film, at this point, the telescopic segment can by elastic elongation,
At this point, the completely axial length of the telescopic segment is telescopic segment by the axial length after elastic elongation.
In the present embodiment, the axial length of the linkage section 123 be 2mm-20mm, for example, 2mm, 4mm, 6mm, 8mm,
10mm, 12mm, 14mm, 16mm, 18mm, 20mm etc., the tie point can be located at the axial centre of the linkage section 123,
The axial centre of the linkage section 123 can not be located at.In the present embodiment, the natural axial distance of the telescopic segment 124 is
10mm-60mm, for example, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm etc..In the present embodiment, the telescopic segment 124
The range of the ratio of its natural axial distance is 1.01:1- when completely axial length and the telescopic segment 124 are in release conditions
1.5:1, for example, 1.01:1,1.05:1,1.1:1,1.2:1,1.3:1,1.4:1,1.5:1.
In the present embodiment, the secluding film 120 is whole is cylindrical in shape, and said tubular is completely covered in the secluding film 120
The outer surface of support frame 110.In the present embodiment, the secluding film 120 is nylon secluding film, terylene secluding film or polytetrafluoro
Secluding film made of the high material of the biocompatibilities such as ethylene secluding film, the secluding film 120 itself do not have tensility.Separately
Outside, in the other embodiments of the utility model, described secluding film itself can also be selected with elastic stretchability material system
At telescopic segment and linkage section are straight at this time, and telescopic segment and linkage section are stretchable secluding film, alternatively, connection
Section is straight non-stretchable secluding film, and only telescopic segment is stretchable secluding film.In the present embodiment, the secluding film 120 can
To be made up of high density braided or other techniques, there is lesser porosity and tensile resistance, effectively blood can be prevented to seep
Channel of blood flow is rebuild in leakage.In the present embodiment, the secluding film 120 can be single layer or multilayer.
In the present embodiment, the secluding film 120 is connected to tubular support by sewing process at tie point 121
On frame 110, particularly, each tie point 121 is sewed with a needle or spininess by suture, and the suture is, for example, poly-
Ester suture, polypropylene suture, polytetrafluoroethylene (PTFE) suture or the preferable suture of other biological compatibility etc., pass through suture
Secluding film 120 and tubular support frame 110 are attached by technique, and the two connection is relatively more firm, it is not easy to be detached from, in the present embodiment
In, same group of tie point 121 is sutured by same root suture, is conducive to improve joint efficiency.In addition, practical new at this
In the other embodiments of type, the secluding film can also be sticked to the correspondence position of tubular support frame at tie point by binder
It sets.In addition, the secluding film can also be by way of hot pressing at tie point in the other embodiments of the utility model
The two is linked together.
In the present embodiment, 121 part of secluding film locating for same group of tie point 121 forms the straight annular of a circle,
The i.e. described linkage section 123 is annular and straight, is conducive to relatively good being stably connected with tubular support frame 110 of secluding film 120.
In the present embodiment, the telescopic segment 124 is wavy on axial vertical section, and particularly, the telescopic segment 124 is in axial direction
It is formed on vertical section by multiple 122 repeated arrangements of wrinkling element or be arranged successively, the wrinkling element 122 is in inverted V type, the U that falls
One of type, Ω type, S type, c-type or at least two combination.Certainly, in the other embodiments of the utility model, institute
Stating telescopic segment can also be at other shapes.Wrinkling element 122 can be unfolded when by axial tension, elongate in the axial direction, directly
To straightened condition, the length when telescopic segment 124 is elongated in the axial direction as straightened condition is the complete axis of telescopic segment at this time
To length (referring to Fig. 5).In the other embodiments of the utility model, it can have between two neighboring wrinkling element straight
Part, the connection both be conducive to.In addition, the telescopic segment is in axial vertical profile in the other embodiments of the utility model
Can also only have a wrinkling element on face.
In the present embodiment, when 110 radial compression of tubular support frame, the tubular support frame 110 is in axial direction at this time
Upper elongation, the tubular support frame 110 affect the secluding film 120 to be elongated in the axial direction by the connection with secluding film 120,
When 110 radial compression of tubular support frame to minimum when, the secluding film 120 is in the axial direction as tubular support frame 110 is stretched
Length is straightened, and the length of the secluding film 120 is completely axial length.At this point, the blood vessel covered stent diameter very little, convenient
Blood vessel covered stent is put into insertion type transportation system, moreover, the sheath pipe diameter of insertion type transportation system can also be with design comparison
It is small, facilitate insertion type transportation system to enter in blood vessel.
After blood vessel covered stent is put into blood vessel by insertion type transportation system, covered to understand the blood vessel in time
Whether the position that membrane support is put into is accurate, the proximal end of the blood vessel covered stent or distal end setting developing apparatus.In this implementation
In example, the developing apparatus is developing ring (not shown), and the developing ring is socketed in the proximal end of the tubular support frame 110
Or distal end, the developing ring is, for example, tantalum wire ring, platinum ring, gold ring etc., when being irradiated by X-ray, the developing ring energy
It is enough identified, so as to accurately identify whether the position of the developing apparatus in the blood vessel is accurate, moreover, the present embodiment
In developing ring can be relatively good be connected on blood vessel covered stent.In addition, in the other embodiments of the utility model, institute
Stating developing ring can also be sewn on the tubular support frame or secluding film by sewing process.In addition, in the utility model
Other embodiments in, the developing apparatus is not limited to developing ring, can also be other structures.In addition, in the utility model
Other embodiments in, the material of the developing apparatus is also not necessarily limited to can also be that other this fields are general for tantalum, platinum and gold
The material that can be identified by X-ray that logical technical staff knows.
Second embodiment
Fig. 6 is a kind of schematic diagram of blood vessel covered stent of the utility model second embodiment, the structure of Fig. 6 and the knot of Fig. 2
Structure is similar, therefore the identical component of identical numbers, and the main difference of the present embodiment and first embodiment is institute
State tubular support frame.
Fig. 6 is referred to, in the present embodiment, the tubular support frame 210 is formed by cuts in metallic pipe, specifically by sharp
Light cutting technique is formed.In the present embodiment, the tubular support frame 210 is connected as an entirety, the tubular support frame 210
Be connected to form by multiple open loop units 213 and multiple closed-loop elements 211, the open loop unit 213 can with open loop unit 213 that
This is connected, and the open loop unit 213 can also be connected with each other with closed-loop element 211, and equally, the closed-loop element 211 can be with
Closed-loop element 211 is connected with each other, and the closed-loop element 211 can also be connected with each other with open loop unit 213.The open loop unit
213 and closed-loop element 211 inside all hollow formation mesh 112.In the present embodiment, the open loop unit 213 refers to not completely
Closed cyclic structure, the open loop unit 213 are that in contrast, two open loop units 213 are connected with the closed-loop element 211
It can combine to form a closed-loop element 211, the closed-loop element 211 refers to completely enclosed cyclic structure namely closed loop list
The side of member 211 successively joins end to end to form a closed structure, and the closed-loop element 211 is rounded, oval, convex polygon
Deng.Fig. 6 is referred to, in Fig. 6, the open loop unit 213, which refers to, does not surround closed structure, the closed-loop element by 4 sides
211 refer to and surround closed structure by 4 sides.In addition, the tubular support frame is also in the other embodiments of the utility model
It can be only made of multiple open loop units, the tubular support frame flexibility is preferable at this time.In addition, the utility model other
In embodiment, the tubular support frame can also be only made of multiple closed-loop elements, at this time the tubular support frame radial support
Property is preferable.
In the present embodiment, the tubular support frame 210 is made of shape memory alloy material, when the blood vessel covered branch
When frame comes out from insertion type conveyance conduit, the blood vessel covered stent can be opened with self-expansion namely the tubular support frame 210
For self-expansion type bracket.But the utility model is without being limited thereto, in the other embodiments of the utility model, the tubular support frame
Can also by be not made of marmem material, by blood vessel covered stent compression be put into insertion type transportation system after,
After release, the blood vessel covered stent will not self-expansion open, at this point, by sacculus that blood vessel covered stent inside is placed into
Row inflation, blood vessel covered stent is strutted, then take out sacculus by balloon expandable, and the blood vessel covered stent after expanding utilizes
The plastic deformation of metallic support, blood vessel covered stent keep it to expand after form, guarantee that blood flow is unobstructed namely the blood vessel covers
Membrane support is balloon-expandable bracket, simultaneously as the tubular support frame is by multiple open loop units and multiple closed-loop element groups
At, although the blood vessel covered stent be balloon-expandable bracket, itself there is certain flexible ability in the axial direction.
3rd embodiment
Fig. 7 is a kind of schematic diagram of blood vessel covered stent of the utility model 3rd embodiment, the structure of Fig. 7 and the knot of Fig. 2
Structure is similar, therefore the identical component of identical numbers, and the main difference of the present embodiment and first embodiment is institute
Stating blood vessel covered stent further includes bare bracket.
Fig. 7 is referred to, in the present embodiment, the blood vessel covered stent further includes bare bracket 330, the bare bracket 330
By the proximal end of the tubular support frame 110, proximally direction is extended to form, and the bare bracket 330 is in the shape of a trumpet.In this implementation
In example, secluding film 120 described in the non-coating in outside of the bare bracket 330.The blood vessel covered stent of the present embodiment is by including naked
Bracket 330 can increase blood vessel covered stent proximal landing zone, especially for aortic disease proximal end it is close or invade branch
The situation that artery causes anchorage zone inadequate can increase by a circle bare bracket 330 in proximal end to provide more anchorage zones, while bare bracket
330 will not completely cut off the patency of branch vessel blood flow.
In the other embodiments of the utility model, the outer surface of the bare bracket is equipped with hangnail, the number of the hangnail
Mesh is more, and when the blood vessel covered stent is placed in the blood vessel, the hangnail is pierced into vascular wall, so as to stablize
The position of blood vessel covered stent in the blood vessel is stated, blood vessel covered stent is not easily moveable.Here, hangnail direction distal end,
The length range of the hangnail is 0.5mm-4mm, for example, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm etc..
Fourth embodiment
Fig. 8 is a kind of schematic diagram of blood vessel covered stent of the utility model fourth embodiment, the structure of Fig. 8 and the knot of Fig. 2
Structure is similar, therefore the identical component of identical numbers, and the main difference of the present embodiment and first embodiment is institute
Stating blood vessel covered stent further includes hangnail.
Fig. 8 is referred to, in the present embodiment, the outer surface of 110 proximal end of tubular support frame is equipped with hangnail 440, institute
State hangnail 440 quantity be it is multiple, multiple hangnails 440 are located on round circumference, the material of the hangnail 440 and institute
The material for stating tubular support frame 110 is identical, and the hangnail 440 passes through the secluding film 120 in 110 outside of tubular support frame, institute
Hangnail 440 is stated towards distal end.When the blood vessel covered stent is placed in the blood vessel, the hangnail 440 is pierced into vascular wall, from
And the position of the blood vessel covered stent in the blood vessel can be stablized, blood vessel covered stent is not easily moveable.
5th embodiment
Fig. 9 is a kind of schematic diagram of blood vessel covered stent of the 5th embodiment of the utility model, the structure of Fig. 9 and the knot of Fig. 7
Structure is similar, therefore the identical component of identical numbers, the main difference of the present embodiment and 3rd embodiment be every
The tubular support frame is not completely covered for exhausted film.In addition, the weaving manner of the two support frame 110 is also different, support frame is in Fig. 9
Hand woven forms, and braider braiding can be used in Fig. 7.
Fig. 9 is referred to, in the present embodiment, the secluding film 520 does not cover all the tubular support frame 110,
Namely the partial outer face of tubular support frame 110 does not have secluding film 520, by the way that such structure, the blood vessel covered stent is arranged
When in blood vessel, the blood vessel covered stent that across branch vessel, can be coated with secluding film 520 at this time can play reconstruction blood flow
The effect in channel does not cover the blood vessel covered stent part of secluding film 520 against the branch vessel, in blood vessel covered stent
Blood can flow in branch vessel, not influence the blood supply of branch vessel.
In addition, in the present embodiment, the tubular support frame 110 is surrounded by network-like structure, the network-like structure is logical
It crosses wire 113 to be knitted to form, specifically, in the present embodiment, the mode that wire 113 weaves is by way of knotting
Two wires 113 are linked together.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is all differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For device embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place referring to
The part of embodiment of the method illustrates.
Above disclosures are merely preferred embodiments of the utility model, the utility model cannot be limited with this certainly
Interest field, therefore equivalent variations made according to the claim of the utility model still fall within the scope of the utility model.
Claims (22)
1. a kind of blood vessel covered stent characterized by comprising
Tubular support frame is connected as a whole and hollow formation proximally to the axial passage of distal end, the tubulose branch
Support can be bent flexible in the axial direction；
Secluding film is covered on the outer surface of at least partly described tubular support frame, has multiple groups connection on the secluding film
Point, the secluding film are connect at tie point with the tubular support frame；
Under release conditions, the completely axial length of the secluding film between the two adjacent groups tie point connects greater than the two adjacent groups
The axial length of tubular support frame between contact.
2. blood vessel covered stent as described in claim 1, which is characterized in that the secluding film includes linkage section and telescopic segment,
The linkage section is the isolation membrane part with the tie point, secluding film of the telescopic segment between two adjacent groups tie point
Part.
3. blood vessel covered stent as claimed in claim 2, which is characterized in that the axial length of the linkage section is 2-20mm.
4. blood vessel covered stent as claimed in claim 2, which is characterized in that the natural axial distance of the telescopic segment is 10-
60mm。
5. blood vessel covered stent as claimed in claim 2, which is characterized in that the linkage section is non-telescoping secluding film, institute
Stating telescopic segment is scalable secluding film；
Or the linkage section and telescopic segment are scalable secluding film.
6. blood vessel covered stent as claimed in claim 2, which is characterized in that the completely axial length of the telescopic segment with it is described
The range of the ratio of its natural axial distance is 1.01:1-1.5:1 when telescopic segment is in release conditions.
7. blood vessel covered stent as claimed in claim 2, which is characterized in that the telescopic segment forms fold in the axial direction.
8. blood vessel covered stent as claimed in claim 7, which is characterized in that the telescopic segment is on axial vertical section by multiple
Wrinkling element repeated arrangement or be arranged successively to be formed, and the wrinkling element is in one in inverted V type, inverted U, Ω type, S type, c-type
Kind or at least two combination.
9. blood vessel covered stent as described in claim 1, which is characterized in that the tubular support frame radial compression to internal diameter most
The hour secluding film is in the axial direction as tubular support frame elongation is straightened.
10. blood vessel covered stent as described in claim 1, which is characterized in that the secluding film be nylon secluding film, terylene every
Exhausted film or polytetrafluoroethylene (PTFE) secluding film.
11. blood vessel covered stent as claimed in claim 2, which is characterized in that the secluding film is at least straight in telescopic segment
Stretchable film.
12. blood vessel covered stent as described in claim 1, which is characterized in that the tubular support frame is enclosed by network-like structure
At.
13. blood vessel covered stent as claimed in claim 12, which is characterized in that the network-like structure passes through metal wire knitted
It forms or is formed by cuts in metallic pipe.
14. blood vessel covered stent as described in claim 1, which is characterized in that the tubular support frame is by cuts in metallic pipe shape
At the tubular support frame is made of multiple open loop units and/or multiple closed-loop elements.
15. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that the blood vessel covered stent is also
Including bare bracket, by the proximal end of the tubular support frame, proximally direction extends to form the bare bracket.
16. blood vessel covered stent as claimed in claim 15, which is characterized in that the blood vessel covered stent further includes hangnail,
The hangnail is arranged on bare bracket outer surface or on the outer surface of tubular support frame proximal end.
17. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that the portion of the tubular support frame
Exceptionally surface does not cover the secluding film.
18. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that the secluding film is completely covered
The outer surface of said tubular support frame.
19. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that the tubular support frame is certainly
Expansion type bracket or balloon-expandable bracket.
20. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that during the tubular support frame is in
Empty cylinder or circular platform type.
21. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that the isolation at tie point
The two is attached by way of suture, viscose glue or hot pressing by film with the tubular support frame.
22. the blood vessel covered stent as described in claim 1-14 any one, which is characterized in that the blood vessel covered stent
Proximal end or distal end setting developing apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820818684.XU CN209107678U (en) | 2018-05-30 | 2018-05-30 | Blood vessel covered stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820818684.XU CN209107678U (en) | 2018-05-30 | 2018-05-30 | Blood vessel covered stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209107678U true CN209107678U (en) | 2019-07-16 |
Family
ID=67195507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820818684.XU Active CN209107678U (en) | 2018-05-30 | 2018-05-30 | Blood vessel covered stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209107678U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110547896A (en) * | 2018-05-30 | 2019-12-10 | 杭州唯强医疗科技有限公司 | Blood vessel covered stent |
| WO2021052486A1 (en) * | 2019-09-20 | 2021-03-25 | 杭州启明医疗器械股份有限公司 | Interventional instrument that is convenient to position, and machining method and interventional system |
| WO2022022143A1 (en) * | 2020-07-29 | 2022-02-03 | 上海苏畅医疗科技有限公司 | Membrane-covered stent |
-
2018
- 2018-05-30 CN CN201820818684.XU patent/CN209107678U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110547896A (en) * | 2018-05-30 | 2019-12-10 | 杭州唯强医疗科技有限公司 | Blood vessel covered stent |
| WO2021052486A1 (en) * | 2019-09-20 | 2021-03-25 | 杭州启明医疗器械股份有限公司 | Interventional instrument that is convenient to position, and machining method and interventional system |
| WO2022022143A1 (en) * | 2020-07-29 | 2022-02-03 | 上海苏畅医疗科技有限公司 | Membrane-covered stent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2179421C2 (en) | Method for setting intralumen transplant by using guiding wire and catheter | |
| CN104586538B (en) | low profile medical device | |
| JP4914957B2 (en) | Medical tools | |
| CN100352406C (en) | Combined membrane-covered stent capable of being bent in any direction | |
| CN104487024B (en) | Support and support delivery device | |
| US20150265394A1 (en) | Devices and methods for treatment of abdominal aortic aneurysms | |
| JP5211272B2 (en) | Stent tissue graft prosthesis | |
| CN101247773B (en) | Stentless support structure | |
| US20140155984A1 (en) | Devices and methods for treatment of abdominal aortic aneurysm | |
| CN209107678U (en) | Blood vessel covered stent | |
| CN108601647A (en) | Reparation vascular tissue defect intraluminal prosthetic device with fluid absorbency ingredient | |
| CN106109056B (en) | A kind of multi-cavity overlay film frame and its application method | |
| CN101945623A (en) | Stent graft for reinforcement of vascular abnormalities and associated method | |
| CA2383428A1 (en) | Prosthesis for abdominal aortic aneurysm repair | |
| JP2001519698A (en) | Endovascular graft for treatment of abdominal aortic aneurysm | |
| CN109419567A (en) | Intraluminal stent | |
| CN209107690U (en) | Segmented overlay film frame | |
| CN107961097A (en) | Intraluminal stent | |
| CN110623780A (en) | Sectional type tectorial membrane stent and preparation method thereof | |
| CN208910578U (en) | Intraluminal stent | |
| RU176368U1 (en) | EXTERNAL BIOLOGICAL PROSTHESIS OF ARTERIES | |
| CN208823059U (en) | Vascular endoprostheses | |
| CN206934211U (en) | Branch type overlay film frame | |
| CN208910579U (en) | Intraluminal stent | |
| CN110547896A (en) | Blood vessel covered stent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |