CN1162253A - Intraluminal stenting graft - Google Patents
Intraluminal stenting graft Download PDFInfo
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- CN1162253A CN1162253A CN95196028A CN95196028A CN1162253A CN 1162253 A CN1162253 A CN 1162253A CN 95196028 A CN95196028 A CN 95196028A CN 95196028 A CN95196028 A CN 95196028A CN 1162253 A CN1162253 A CN 1162253A
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- graft
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- pipe fitting
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Abstract
This invention is an intraluminal stenting graft (10) for implantation in a blood vessel and a method for making same wherein the intraluminal stenting graft includes a collapsible tube member (12) having a first end (14) and a second end (16). An outer layer (18) and inner layer (20) extend between the ends (14,16). The outer layer (18) is more flexible than the inner layer (20). The outer layer (18) is joined to the inner layer (20) to form a plurality of cylinders (30) longitudinally extending between the first end (14) and the second end (16). The method of the present invention including the steps of placing a first layer of material (70) on a shaped surface; maintaining the second layer (80) on said shaped surface by use of reverse pressure; moving the second layer to the first layer; joining the second layer to the first layer to form a plurality of longitudinally extending cylinders; and shaping the first and second layers to form a tube member.
Description
The present invention relates to the graft that exhibition is stretched in a kind of tube chamber.Particularly, the present invention relates to a kind ofly be used in the tube chamber that blood vessel transplants exhibition and stretch graft, this graft comprises a pipe fitting of being made up of many column casings.The present invention also relates to the method that graft is stretched in this exhibition of manufacturing further.
Graft is stretched in known in the prior art some kinds of intraluminal exhibitions.In U.S. Pat 5,156, the graft that exhibition is stretched in a kind of tube chamber is disclosed in 620, be incorporated herein document document as a comparison.To open up in the graft implantable intravascular of stretching, in the tube chamber so that for example treat aortic aneurysm.They also are used to support the focus section of blood vessel or the narrow section of the blood vessel that causes because of arteriosclerosis.
The present invention aims to provide a kind of interior graft and a kind of method of making this graft of stretching of opening up of tube chamber that is used for being implanted into blood vessel.The graft that exhibition is stretched in the tube chamber comprises a folding pipe fitting with first end and second end.Skin and internal layer extend between these two ends, and outer have bigger flexibility than internal layer.Outer and internal layer be connected to form a plurality of between first end and second end column casing of longitudinal extension.
Method of the present invention comprises the following steps:
A) the ground floor material is placed on the surface of a substantially flat;
B) second layer material is placed on the molded surface;
C) utilize buffer brake that the second layer is remained on the above-mentioned molded surface;
D) second layer is moved to ground floor;
E) second layer is connected with ground floor, forms many column casings that extend longitudinally; And
F) ground floor and the second layer are shaped to a pipe fitting.
Main purpose of the present invention provides the graft that exhibition is stretched in a kind of effective tube chamber.
Free-revving engine of the present invention provides a kind of graft of stretching than exhibition in the tube chamber more easy to use.
Other purpose of the present invention and advantage will come into plain view after reference accompanying drawing and detailed description of the present invention; Among the figure:
Fig. 1 is the perspective view of first embodiment of the graft that exhibition is stretched in the tube chamber of the present invention;
Fig. 2 is the cutaway view of a plurality of column casings of the present invention of dissecing of the line 2-2 along Fig. 1;
Fig. 3 is the line 3-3 side cross sectional view along Fig. 2, shows the check valve of the present invention that is arranged in the pipe fitting end walls apertures;
Fig. 4 is the line 4-4 side cross sectional view along Fig. 2, shows one of column casing of the present invention;
Fig. 5 is the cutaway view that is illustrated in the graft that exhibition is stretched in the tube chamber of the present invention that implant site in the blood vessel is contraction state;
Fig. 6 is the cutaway view similar with Fig. 5, the graft that exhibition is stretched in the tube chamber behind the expression implantable intravascular;
Fig. 7 is second embodiment of the graft that exhibition is stretched in the tube chamber of the present invention;
Fig. 8 is the side view of ground floor material on the platen of handling according to method of the present invention;
Fig. 9 is expression is remained on the second layer material on the molded surface by buffer brake according to a method of the present invention side view;
Figure 10 is and the similar side view of Fig. 9 that the expression second layer is connected with ground floor; And
Figure 11 is the side view after representing the second layer and ground floor being connected.
Referring now to accompanying drawing the present invention is described in detail.Referring to Fig. 1 and 2, the graft that exhibition is stretched in the tube chamber of the present invention marks with sequence number 10.The graft 10 that exhibition is stretched comprises a contractile pipe fitting 12 with first end 14 and second end 16.Outer material 18 and internal layer material 20 extend between above-mentioned first end 14 and second end 16.First end wall 22 is between skin 18 and the internal layer 20 at first end 14 and extends.Second end wall 24 is between skin 18 and the internal layer 20 at second end 16 and extends.
Shown in Fig. 1,2 and 4, outer 18 are connected with internal layer 20, form many between first end 14 and second end 16 column casing 30 of longitudinal extension.As shown in Figure 1, pipe fitting 12 can comprise the chamber 32 of radially extending that is communicated with a plurality of column casings 30.In the present embodiment, chamber 32 is adjacent with first end 14.But show and ferrum is seen, chamber 32 can be positioned at all places along the length direction of this chamber.
With reference to Fig. 1, pipe fitting 12 can comprise hole 40 on first end wall 22.Fluid can be introduced in this hole 40, as air.As described below, this fluid makes and shrinks pipe fitting 12 expansions, in implantable intravascular.As shown in Figure 3, a check valve 42 can be set, as check-valves in hole 40.This valve 42 is used for fluid is introduced pipe fitting 12.After fluid was introduced pipe fitting, this valve prevented that fluid from overflowing from pipe fitting 12.Fluid can enter pipe fitting 12 through valve 42 by means of fluid conduit systems 44.
With reference to Fig. 2, skin 18 is made with the biocompatible polymeric material of internal layer 12 usefulness.An example of this material is a politef.Outer 18 by bigger than internal layer 20 flexibilities, and the material that weight is lighter is made.So just make that outer 18 have more compliance when pipe fitting 12 expands.Internal layer 20 can be used a kind of material, handles or coating as porous Teflon (ePTEE), so that form the surface that is more conducive to blood flow.
As shown in Figure 2, when pipe fitting 12 was in swelling state, each column casing 30 all had a centrage C who passes the column casing longitudinal extension.This centrage C is two radius R
1And R
2The starting point of extending.Radius R
1And R
2Limit an angle beta.The β angle can be greater than 90 ° of obtuse angles less than 180 °.When many column casings 30 adjoin each other when forming as shown in Figure 2 a pipe fitting 12 radius R of one of column casing
1Radius R with adjacent column casing
2Intersect.This design concurs many column casings 30, keeps pipe fitting 12 to be in stable swelling state, so that implantable intravascular.Have now found that, compare with internal layer 20 that outer 18 have the bigger compliance and the material of greater number, this just makes the β angle less than 180 °.When pipe fitting 12 expanded, many column casings 30 interacted, the circle that forces pipe fitting 12 to form as shown in Figure 1.This just provides a unlimited passage 46 for blood flows in blood vessel.
With reference to Fig. 5 and Fig. 6, pass blood vessel to implant site 52 by handling the pipe fitting 12 that shrinks, will open up in graft 10 implantable intravasculars of stretching 50 in the tube chamber of the present invention.Pipe fitting can be handled with the conduit 44 that communicates with valve 42, or other device that is suitable for control by some.As shown in Figure 6, when the graft of stretching when exhibition accurately put in place, the fluid of introducing from conduit 44 40 entered chamber 32 and column casing 30 through the hole.Chamber 32 can make fluid be distributed in effectively in the column casing 30.As mentioned above, many column casings 30 and skin 18 and internal layer 20 concur, and keep pipe fitting 12 rounded duct shapes.Fill with after the fluid, remove conduit 44; 10 of the graft that exhibition is stretched make blood flow at the passage 46 that passes implant site 52 places.
Second embodiment of the graft that exhibition is stretched in the tube chamber of the present invention as shown in Figure 7.The graft 10 that exhibition is stretched comprises a stem portion 60 and branching portion 62 and 64.This embodiment can be used for the bifurcation as aorta and iliac artery.Stem portion 60 can be positioned at aorta, and branching portion 62 and 64 can be positioned at iliac artery.Also can make many other shapes according to purposes.
With reference to Fig. 8 to 11 in detail, the method for the graft that exhibition is stretched in the manufacturing tube chamber of the present invention is described in detail.Referring to Fig. 8, will be placed on a plane corresponding to the ground floor material 70 of internal layer 20, on platen 72.By means of applicator 76,,, be coated on the ground floor 70 as viscose glue 4 with binding agent.
As shown in Figure 9, will be placed on the forming surface 82 corresponding to outer 18 second layer material 80.Forming surface 82 comprises some grooves 84 of the longitudinal extension with for example partial column casing shape.These grooves 82 comprise a synthetic polymer resin and goods, as the coating 86 of polytetrafluoroethylene, to prevent the second layer 80 and forming surface 82 adhesions.Buffer brake or negative pressure by means of reversible pump P produces are fixed on the forming surface 82 second layer 80.
As shown in figure 10, the second layer 80 is moved to ground floor 70, layer 80 and 70 is fixed together by means of viscose glue 74.Also can adopt the hot sealing process (not shown) to link together with two-layer.
As shown in figure 11, ground floor 70 forms a plurality of column casings that extend longitudinally 30 as previously mentioned with being connected of the second layer 80.Chamber 32, end wall 22 and 24 and also available this method in hole 40 make.The end of the two-layer longitudinal extension after the connection can be drawn close mutually and glue together with binding agent, or in other words, forms the column casing shape pipe fitting shown in Fig. 1 and 5.
The ground floor 70 that adopts in said method and the second layer 80 can be with aforesaid outer 18 and the used polymeric material manufacturing of internal layer 20.With the column casing 30 of method molding of the present invention, its centrage C, radius R
1And R
2And all have aforesaid identical characteristics less than 180 ° β angle.
Under the prerequisite that does not surmount the scope of the present invention that is defined by the following claims, the present invention can carry out the modifications and changes of variety of way.
Claims (16)
1. the graft that exhibition is stretched in the tube chamber used of an implantable intravascular, it comprises: the contractile pipe fitting with first end and second end, a skin and an internal layer of between above-mentioned two ends, extending, above-mentioned skin is more pliable and tougher than above-mentioned internal layer, above-mentioned skin be connected with above-mentioned internal layer with form many between above-mentioned first end and second end column casing of longitudinal extension, above-mentioned column casing forms the supporting construction of above-mentioned pipe fitting.
2. the graft that exhibition is stretched in the tube chamber as claimed in claim 1 is characterized in that: above-mentioned crushable pipe fitting is included in also that above-mentioned first end is in first end wall that extends between above-mentioned skin and the internal layer and is in second end wall that extends between above-mentioned skin and the internal layer at above-mentioned second end.
3. the graft that exhibition is stretched in the tube chamber as claimed in claim 2 is characterized in that: one of above-mentioned end wall comprises that is introduced the hole that fluid is used.
4. the graft that exhibition is stretched in the tube chamber as claimed in claim 3, it is characterized in that: above-mentioned fluid is an air.
5. the graft that exhibition is stretched in the tube chamber as claimed in claim 3, it is characterized in that: it also comprises a valve that is arranged in above-mentioned hole, so that above-mentioned fluid introduced above-mentioned pipe fitting and prevent that above-mentioned fluid from overflowing from above-mentioned pipe fitting.
6. the graft that exhibition is stretched in the tube chamber as claimed in claim 1, it is characterized in that: each above-mentioned column casing includes the centrage that a longitudinal extension passes above-mentioned column casing, above-mentioned centrage is the starting point that two radiuses extend, and above-mentioned two radius defines an angle, and above-mentioned angle is less than 180.
7. the graft that exhibition is stretched in the tube chamber as claimed in claim 6, it is characterized in that: above-mentioned many column casings adjoin each other to form above-mentioned pipe fitting, the described radius of one of above-mentioned column casing and the relevant radii of adjacent column casing intersect, above-mentioned column casing cooperates jointly, to prevent that after above-mentioned pipe fitting has expanded above-mentioned many column casings shrink.
8. the graft that exhibition is stretched in the tube chamber as claimed in claim 1, it is characterized in that: above-mentioned internal layer and skin are to be made of polymeric material.
9. the graft that exhibition is stretched in the tube chamber as claimed in claim 8, it is characterized in that: above-mentioned outer field material is lighter than the material of above-mentioned internal layer.
10. one kind is used to make the method that exhibition is stretched in the tube chamber graft is used, and comprises the steps:
A) the ground floor material is placed on the surface of a substantially flat;
B) second layer material is placed on the forming surface;
C) utilize buffer brake that the above-mentioned second layer is remained on the described forming surface;
D) the above-mentioned second layer is moved to above-mentioned ground floor;
E) the above-mentioned second layer is connected with above-mentioned ground floor, forms the column casing of many longitudinal extensions; And
F) making the first and second above-mentioned formable layers is a pipe fitting.
11. method as claimed in claim 10 is characterized in that: the material of above-mentioned ground floor is a kind of polymeric material.
12. method as claimed in claim 11 is characterized in that: the material of the above-mentioned second layer is a kind of polymeric material.
13. method as claimed in claim 12 is characterized in that: the material of the above-mentioned second layer is lighter than the material of above-mentioned ground floor.
14. method as claimed in claim 10 is characterized in that: above-mentioned forming surface is cylindrical basically.
15. method as claimed in claim 10, it is characterized in that: each above-mentioned column casing comprises that a longitudinal extension passes the centrage of above-mentioned column casing, above-mentioned centrage is the starting point that two radius is extended, and above-mentioned two radius is determined an angle, and above-mentioned angle is less than 180 °.
16. method as claimed in claim 15, it is characterized in that: above-mentioned many column casings adjoin each other and form above-mentioned pipe fitting, the above-mentioned radius of one of above-mentioned column casing and the relevant radii of adjacent column casing intersect, and above-mentioned column casing cooperatively interacts, to prevent that above-mentioned many column casings shrink after above-mentioned pipe fitting has expanded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95196028A CN1162253A (en) | 1994-11-03 | 1995-11-02 | Intraluminal stenting graft |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/334,524 | 1994-11-03 | ||
| CN95196028A CN1162253A (en) | 1994-11-03 | 1995-11-02 | Intraluminal stenting graft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162253A true CN1162253A (en) | 1997-10-15 |
Family
ID=5083086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95196028A Pending CN1162253A (en) | 1994-11-03 | 1995-11-02 | Intraluminal stenting graft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162253A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188570A (en) * | 2013-03-15 | 2015-12-23 | W.L.戈尔及同仁股份有限公司 | Recanalization device |
-
1995
- 1995-11-02 CN CN95196028A patent/CN1162253A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188570A (en) * | 2013-03-15 | 2015-12-23 | W.L.戈尔及同仁股份有限公司 | Recanalization device |
| CN105188570B (en) * | 2013-03-15 | 2019-09-24 | W.L.戈尔及同仁股份有限公司 | Exchange device again |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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