CN109730804A - Overlay film frame - Google Patents
Overlay film frame Download PDFInfo
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- CN109730804A CN109730804A CN201811483022.2A CN201811483022A CN109730804A CN 109730804 A CN109730804 A CN 109730804A CN 201811483022 A CN201811483022 A CN 201811483022A CN 109730804 A CN109730804 A CN 109730804A
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- overlay film
- film frame
- bar
- frame
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Abstract
The present invention relates to a kind of overlay film frames, including rack body and the first film being coated on the rack body, the outer wall of the overlay film frame is equipped at least two bars, the both ends of each bar are connect with the rack body respectively, each bar is equipped at least one layer of second film, second film is connect with the first film, to stop blood flow to be flowed out from the proximal end of the overlay film frame via the inside of the bar from the distal end of the overlay film frame；The bar is folded under transport status and is covered on the outer wall of the overlay film frame, and rebound is expanded to upon discharge intersects with the outer wall of the overlay film frame.Overlay film frame of the invention is able to solve the interior leakage problem in chimney art, and reduces the dress sheath difficulty of overlay film frame.
Description
Technical field
The present invention relates to interventional medical device technical field more particularly to a kind of overlay film frames.
Background technique
In aorta intracavitary therapy, it is closer to branch vessel when encountering interlayer cut part, so that aorta overlay film
When the anchorage zone deficiency of bracket, isolation lesion locations are often reached using chimney technology or orthotopic fenestration technology and are opened point
The purpose of branch vessel.When using chimney technology, since the opening of branch vessel is crossed and covered to aorta tectorial membrane stent, and divide
The proximal segment and aortic stents of branch bracket are arranged parallel in aorta vessel, and the distal ports of branch stent are from branch vessel
Opening protrude into branch vessel, to will form in aorta vessel, between aortic stents and branch stent biggish
Gap enables blood flow to flow through to form interior leakage from gap, is unfavorable for the treatment of lesion, results even in operative failure.
Referring to FIG. 1, the proximal segment of branch stent 110 is placed in aorta vessel 120 and parallel with aortic stents 130
Setting, distal ports are placed in the branch vessel 140 of aorta vessel 120, please also refer to Fig. 1 and Fig. 2, aortic stents 130
With 110 proximal segment of branch stent due to being arranged parallel in aorta vessel 120, thus can generate therebetween larger at two
Gap 150, blood can flow through from these gaps 150, so that leakage in generating, is unfavorable for the treatment of lesion 160, when serious
It will lead to operative failure.
Summary of the invention
Based on this, it is necessary to provide a kind of overlay film that can be reduced interior leakage and occur for interior leakage problem present in chimney art
Bracket.
A kind of overlay film frame, including rack body and the first film being coated on the rack body, the overlay film branch
The outer wall of frame is equipped at least two bars, and the both ends of each bar are connect with the rack body respectively, each described
Bar is equipped at least one layer of second film, and second film is connect with the first film, to stop blood flow to cover from described
It is flowed out via the inside of the bar from the distal end of the overlay film frame proximal end of membrane support；The bar is rolled under transport status
Folded to be covered on the outer wall of the overlay film frame, rebound is expanded to upon discharge intersects with the outer wall of the overlay film frame.
Angle of the bar after rebound expansion between the axial direction of the overlay film frame in one of the embodiments,
It is 80 ° to 100 °.
Multiple bars are spirally distributed on the outer wall of the overlay film frame in one of the embodiments,.
Bar described in second film coated in one of the embodiments, and a part of second film with
The first film is connected.
Second film is connected on the first film in hood-like in one of the embodiments, and described the
The proximal end of two films connect with the bar and forms an opening.
The number of the bar is 2 to 30 in one of the embodiments,.
The bar is waveform bar in one of the embodiments,.
The wave height of the waveform bar is 3 millimeters to 15 millimeters in one of the embodiments,.
Distance of the both ends of the waveform bar on the overlay film frame outer wall is 3 millimeters in one of the embodiments,
To 10 millimeters.
Multiple bars surround outer wall one week and radial point of the overlay film frame in one of the embodiments,
Cloth.
Above-mentioned overlay film frame, bar and the cooperation of the second film are to stop blood flow from the proximal end of overlay film frame via in bar
Portion is flowed out from the distal end of overlay film frame, can be blocked to gap existing for overlay film frame outside, be passed through and stop gap location blood
Liquid stream is dynamic to slow down blood flow, to promote the formation of thrombus at bar, realization blocks the gap at bar, reduces interior
The generation of leakage.Further, since bar is folded under transport status on the outer wall for being covered on overlay film frame, and exhibition is sprung back upon discharge
It opens to the outer wall with overlay film frame and intersects namely bar has from fold characteristic, so that bar and being located on bar second thin
Film can keep folded form when being extruded, and to reduce the influence to surrounding tissue or other implants, upon discharge can
Automatically the blood flow of gap location is stopped.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that aortic stents and branch stent cooperate in aorta vessel in chimney art；
Fig. 2 is the structural schematic diagram that aortic stents and branch stent cooperatively form gap in Fig. 1；
Fig. 3 is the structural schematic diagram of the overlay film frame of embodiment 1；
The overlay film frame that Fig. 4 is Fig. 3 from one end towards as viewed from the other end when structural schematic diagram；
Fig. 5 is that the bar of the overlay film frame of embodiment 1 is fixed on the structural schematic diagram on rack body；
Fig. 6 is the structural schematic diagram of the overlay film frame of embodiment 2；
The overlay film frame that Fig. 7 is Fig. 6 from one end towards as viewed from the other end when structural schematic diagram；
Fig. 8 is the structural schematic diagram when hood-like structure of the overlay film frame of embodiment 3 is not impacted by blood flow；
Fig. 9 is the hood-like structure of the overlay film frame of Fig. 8 by the structural schematic diagram after blood flow impact；
Figure 10 is the overlay film frame of embodiment 3 and the structural schematic diagram that aortic stents cooperate in aorta vessel.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that one end that blood flow flows into aorta vessel is generally known as overlay film branch in overlay film frame field
One end of blood flow outflow aorta vessel is known as " distal end " of overlay film frame, and covers according to the definition of this principle by " proximal end " of frame
" proximal end " and " distal end " of the either component of membrane support." axial direction " generally refers to length direction of the overlay film frame when being conveyed,
" radial direction " generally refers to the direction vertical with its " axial direction " of overlay film frame, and any portion of overlay film frame is defined according to this principle
" axial direction " and " radial direction " of part.
Below with reference to the specific embodiment technical solution that present invention be described in more detail.
Embodiment 1
Embodiment 1 proposes a kind of overlay film frame, can be used as the branch stent being used cooperatively with aorta tectorial membrane stent, with solution
The interior leakage problem certainly generated in chimney art.Please also refer to Fig. 3 and Fig. 4, overlay film frame 200 includes hollow tubular and both ends are opened
Mouthful rack body 210 and the first film 220 that is coated on rack body 210, set on the outer wall of overlay film frame 200 there are two
Bar 230, the two bars 230 can be symmetrical arranged, and asymmetric can also be arranged.The both ends a and b of each bar 230 respectively with branch
Frame body 210 connects, and each bar 230 is equipped at least one layer of second film 240, and the second film 240 passes through coating technique packet
Bar 230 is covered, and a part of the second film 240 is connected with the first film 220, to stop blood flow from the close of overlay film frame 200
It is flowed out via the inside of bar 230 from the distal end of overlay film frame 200 at end.It should be noted that " cladding " described herein refers to,
The inside and edge of bar 230 is completely covered in second film 240, and the edge of the second film 240 and bar 230 is used and wound
Etc. modes be fixedly connected, thus make the second film 240 be coated on bar 230 after formed a closure member, with stop blood flow from
It is flowed out via the inside of bar 230 from the distal end of overlay film frame 200 proximal end of overlay film frame 200.
Rack body 210 can be made of metal material or high molecular material, it is preferred to use the braiding of nickel-titanium metal silk is made, and has
Have a higher support strength, after implantable intravascular can self-expanding be unfolded and then guarantee that blood flow is unobstructed.The first film 220 and second is thin
Film 240 can be used PTFE (Poly tetra fluoro-ethylene, polytetrafluoroethylene (PTFE)) film and be made.Rack body 210
It is inside and outside to be respectively coated by one layer of the first film 220, and the first film 220 is fixed on by rack body by heat treatment
On 210.
Bar 230 can be made of metal material or high molecular material, it is preferred to use nickel-titanium metal bar is made, and fixed by heat
Type makes it under free condition in unfolded state as shown in Figure 3.Referring to FIG. 5, the both ends a and b of bar 230 pass through winding
Mode is fixed on rack body 210, can be also fixed by modes such as spot welding, suture or integrated wovens, be passed through again later
Thermal finalization makes 80 ° to 100 ° of the angle c between bar 230 and the axial direction of overlay film frame 200, preferably 80 °, 90 ° or 100 °.
Bar 230 is resiliently expanded to and overlay film upon discharge under transport status on the foldable outer wall for being covered on overlay film frame 200
The outer wall of bracket 200 intersects, namely unfolded state as shown in Figure 3 is presented in rebound.Bar 230 rebound expansion after with overlay film branch
Angle c between the axial direction of frame 200 is 80 ° to 100 °, and preferably 80 °, 90 ° or 100 ° namely bar 230 are under free condition
And under unfolded state, or near normal vertical with overlay film frame 200 can constitute the resistance of larger area to the blood flow of gap location
Gear accelerates to form thrombus at bar 230, thus the generation leaked in reducing.And angle c not in the range of 80 ° to 100 ° when,
Bar 230 is smaller to the blocking area of the blood flow of gap location, is unfavorable for forming thrombus at bar 230, cannot also reduce interior
The generation of leakage.
In other embodiments, the number of bar 230 can be 3 to 30, and have enough bars 230 to respectively correspond setting
There are the position in gap, in other bars 230, there can be the bar 230 of part when from one end of overlay film frame 200 towards another
End is when looking completely overlapped or partly overlaps, and can also have the bar 230 of part on the same axial position edge of overlay film frame 200
The circumferentially continuous or interval setting of overlay film frame 200；When having all or part of bar 230 in the same cross of overlay film frame 200
Along the circumferentially continuous setting of overlay film frame 200 one week at the position in section, for example, there is multiple bars 230 around overlay film frame 200
Outer wall one week and when radially distributing, such overlay film frame 200 also is used as aorta tectorial membrane stent, and all shelves
Bar 230 is not only easy to be unfolded, and is also easy into sheath.
The shape of bar 230 can be the regular shapes such as triangle, semicircle, or other irregular shapes,
This is with no restriction.In the present embodiment, bar 230 is waveform bar as shown in Figure 5, it is preferable that wave height (namely the wave of waveform bar
Vertical range of the peak to rack body 210) it is 3 millimeters to 15 millimeters, the both ends a and b of waveform bar is on 200 outer wall of overlay film frame
Distance be 3 millimeters to 10 millimeters.When the wave height of waveform bar is less than 3 millimeters, overlay film frame 200 fills sheath difficulty, when waveform bar
The radial force that overlay film frame 200 can be provided when wave height is greater than 15 millimeters becomes smaller.When the both ends a and b of waveform bar are in overlay film frame
When distance on 200 outer walls is less than 3 millimeters, the blocking area that bar 230 is formed is smaller and is difficult to effectively stop blood flow,
Overlay film frame 200 is difficult into sheath when distance is greater than 10 millimeters.It is appreciated that the shape and size of different bars 230 can be identical,
It can also be different.It, being capable of more effective ground resistance with aorta tectorial membrane stent cooperation when such bar 230 is on branch stent
The blood flow of gap location is kept off, promotes the formation of thrombus near bar 230, preferably reduces the interior generation leaked, while also reducing and covering
The dress sheath difficulty of membrane support 200.
The overlay film frame 200 of embodiment 1, bar 230 and the cooperation of the second film 240 can be to depositing outside overlay film frame 200
Gap blocked, by stop gap location blood flow to slow down blood flow, to promote the shape of thrombus at bar 230
At realization blocks the gap at bar 230, reduces the generation of interior leakage.Further, since bar 230 is in transport status
Lower folding is covered on the outer wall of overlay film frame 200, and is sprung back to be expanded to upon discharge and be intersected with the outer wall of overlay film frame 200,
Namely bar 230 has from fold characteristic, and bar 230 is being extruded with the second film 240 being located on bar 230
When keep folded form, upon discharge can be automatically to gap location to reduce influence to surrounding tissue or other implants
Blood flow is stopped.
Embodiment 2
Details are not described herein for part identical with the overlay film frame 200 of embodiment 1 in the overlay film frame 300 of embodiment 2, and two
The difference of person essentially consists in, and in embodiment 2, multiple bars 330 are spirally distributed on the outer wall of overlay film frame 300.It please one
And Fig. 6 and Fig. 7 is referred to, overlay film frame 300 is equipped with 5 bars 330, these bars 330 are on the outer wall of overlay film frame 300
Helical form interval is uniformly distributed, and on the overlay film frame 300 bar 330 of distalmost end and most proximal end bar 330, from covering
Coincidence when one end of membrane support 300 is looked towards the other end.Adjacent bar 330 is when being spaced too big in the axial direction of overlay film frame 300
It is unfavorable for forming blood flow good closure, the dress of overlay film frame 300 sheath is difficult when being spaced too small, in the present embodiment, adjacent bar
330 in the axial direction of overlay film frame 300 can in spacer main body 310 one or more wave circle length (d in such as Fig. 5) away from
From, preferably 2 millimeters to 10 millimeters, better leak preventing effect can be obtained.
In other embodiments, it can be partly attached to together between the adjacent bar 330 being spirally distributed, such as
It is sequentially connected end to end, can also be anisotropically spaced apart on the outer wall of overlay film frame 300 between adjacent bar 330；Bar 330
Quantity may be alternatively provided as more than 5, from one end of overlay film frame 300 towards as viewed from the other end when, can have the bar 330 of part
It is overlapped or partly overlaps, can also have same axial position of the bar 330 of part in overlay film frame 300 along overlay film frame 300
It is circumferentially continuous or interval setting one week.
The overlay film frame 300 of embodiment 2 solves needs and adjusts the angle and could effectively block the deficiency in gap, in addition, working as
After overlay film frame 300 is implanted into, if gap is longer, the multiple bars 330 being axially distributed can substantially reduce velocity of blood flow, add
The formation of fast thrombus, while preventing thrombus breaks loose；The multiple bars 330 for axially offsetting setting can also effectively reduce dress sheath section
Product solves the problems, such as excessively to cause to fill sheath difficulty because of bar 330.
Embodiment 3
Details are not described herein for part identical with the overlay film frame 200 of embodiment 1 in the overlay film frame 400 of embodiment 3, and two
The difference of person essentially consists in, and in embodiment 3, please also refer to Fig. 8-Figure 10, overlay film frame 400 is symmetrical or non-right equipped with 2
Claim the bar 430 of setting, each bar 430 is equipped at least one layer of second film 440, and the second film 440 is connected in hood-like
In on the first film of rack body 410, and the proximal end of the second film 440 connect with bar 430 and forms an opening 450.
Second film 440 has a semiclosed form of arc, and the value of axial length is 2 millimeters to 30 millimeters, and preferably 15
Millimeter forms hood-like structure 460, hood on overlay film frame 400 with the first film and the cooperation of bar 430 in the deployed state
The number and distribution characteristics of shape structure 460 are same as Example 1, and details are not described herein.It should be noted that when the second film
When 440 axial length is greater than 30 millimeters, the inside of the second film 440 is not easy expansion and is blocked with being formed.
The overlay film frame 400 of embodiment 3, can preferably solve gap it is longer when closure problem, while being also equipped with bar
430 fold characteristic certainly, can guarantee the first time after overlay film frame 400 discharges, its proximal openings is unfolded in gap location
450, so that hood-like structure be made to be sufficient filling with gap after deployment；When there is no the place release overlay film frame 400 in gap,
Hood-like structure can not be unfolded, and due to hood-like structure be bonded 400 outer wall of overlay film frame, reduce to surrounding tissue or he plant
Enter the influence of body.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of overlay film frame, including rack body and the first film being coated on the rack body, which is characterized in that institute
The outer wall for stating overlay film frame is equipped at least two bars, and the both ends of each bar are connect with the rack body respectively,
Each bar is equipped at least one layer of second film, and second film is connect with the first film, to stop blood flow
It is flowed out from the proximal end of the overlay film frame via the inside of the bar from the distal end of the overlay film frame；The bar is conveying
It folds and is covered on the outer wall of the overlay film frame under state, rebound is expanded to the outer wall phase with the overlay film frame upon discharge
It hands over.
2. overlay film frame as described in claim 1, which is characterized in that the bar rebound expansion after with the overlay film frame
Axial direction between angle be 80 ° to 100 °.
3. overlay film frame as described in claim 1, which is characterized in that multiple bars are on the outer wall of the overlay film frame
It is spirally distributed.
4. overlay film frame as described in claim 1, which is characterized in that bar described in second film coated, and described
A part of two films is connected with the first film.
5. overlay film frame as described in claim 1, which is characterized in that second film is connected to described first in hood-like
On film, and the proximal end of second film connect with the bar and forms an opening.
6. overlay film frame as described in claim 1, which is characterized in that the number of the bar is 2 to 30.
7. overlay film frame as described in claim 1, which is characterized in that the bar is waveform bar.
8. overlay film frame as claimed in claim 7, which is characterized in that the wave height of the waveform bar is 3 millimeters to 15 millimeters.
9. overlay film frame as claimed in claim 7 or 8, which is characterized in that the both ends of the waveform bar are in the overlay film frame
Distance on outer wall is 3 millimeters to 10 millimeters.
10. overlay film frame as described in claim 1, which is characterized in that multiple bars are around the outer of the overlay film frame
It wall one week and radially distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483022.2A CN109730804B (en) | 2018-12-05 | 2018-12-05 | Covered stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811483022.2A CN109730804B (en) | 2018-12-05 | 2018-12-05 | Covered stent |
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| Publication Number | Publication Date |
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| CN109730804A true CN109730804A (en) | 2019-05-10 |
| CN109730804B CN109730804B (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811483022.2A Active CN109730804B (en) | 2018-12-05 | 2018-12-05 | Covered stent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022068167A1 (en) * | 2020-09-29 | 2022-04-07 | Suzhou Zenith Vascular Scitech Limited | Covered stent |
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| CN106714734A (en) * | 2014-08-21 | 2017-05-24 | 爱德华兹生命科学公司 | Dual-flange prosthetic valve frame |
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| US5575818A (en) * | 1995-02-14 | 1996-11-19 | Corvita Corporation | Endovascular stent with locking ring |
| US7081132B2 (en) * | 2002-05-16 | 2006-07-25 | Cook Incorporated | Flexible barb for anchoring a prosthesis |
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| CN109730804B (en) | 2021-02-26 |
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Effective date of registration: 20221215 Address after: 518063 8th floor, Xianjian technology building, No. 22, Keji South 12th Road, community, high tech Zone, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee after: LIFETECH SCIENTIFIC (SHENZHEN) Co.,Ltd. Address before: 1002, Xianjian technology building, 22 Keji South 12 road, high tech community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Xianjian Changtong Medical Co.,Ltd. |
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