MXPA97003120A

MXPA97003120A - Intralumi disposal graft

Info

Publication number: MXPA97003120A
Application number: MXPA/A/1997/003120A
Authority: MX
Inventors: L Rogers Russell; E Turk Rodney
Original assignee: Aeroquip Corporation
Priority date: 1994-11-04
Filing date: 1997-04-29
Publication date: 1997-06-01

Abstract

This invention is an intraluminal stent graft 10 for implantation in a blood conduit and a method for making the same, wherein the intraluminal stent graft includes a collapsible tube member 12 having a first end 14 and a second end (16). An outer layer (18) and an inner layer (20) extends between the ends 914, 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 (3) extending longitudinally 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 980) on the surface configured by the 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 930) and configuring the first and second layers to form a member of your

Description

INTRALUMINAL DISPOSAL GRAFT Prior Art The present invention is directed to an intraluminal stitch graft. More specifically, the invention is directed to an intraluminal blunt graft. It will implant in a blood vessel including a folding tube member formed from a cylinder Dilution. The invention is also directed to a method for making said blunt graft. Intraluminal blunt grafts are known in the art. An example of an intrluinal blunt / blunt graft is described in U.S. Patent No. 5,156.62 which is incorporated herein by reference. Intraluminal blunt grafts are implanted in a blood vessel to stop, for example, aortic aneurysms. They are also used to support sections of a blood line that is diseased or narrowed by arterioscroses.

Disclosure of the Invention The present invention is directed to an intraluminal d-stitch graft for implantation in a blood conduit and a method for making the same. The intraluminal blunt graft includes a collapsible tube member having a first ext and a second end. An outer layer and an inner layer extend between the ends. The outer layer is more flexible than the inner layer. The outer layer is attached to the inner layer to form a plurality of cylinders extending longitudinally between the first end and the second end. The method of the present invention includes steps d (a) placing a first layer of material on a substantially flat surface; (b) placing a second layer of material on its configured surface; (c) maintaining the second layer on the surface confined by the use of reverse pressure; (d) moving the second layer to the first layer; (e) joining the second layer to the first layer to form a plurality of longitudinally extending cylinders; and (f) configuring the first and second layers to form a tube member. The main object of the present invention is to provide an intraluminal blunt graft which is efficient. An important object of the present invention is to provide an intraluminal blunt graft that is relatively easy to use. Other objects and advantages of the invention will become apparent after a review of the accompanying drawings and the following detailed description of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a first embodiment of an intraluminal stent graft in accordance with the present invention; Figure 2 is a cross-sectional view of the plurality of cylinders of the present invention, taken along the line 2-2 of Figure 1; Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2, showing a valve of the present invention positioned in the aperture in the end wall of the tube member; Figure 4 is a cross-sectional view taken along line 4-4 of Figure 2, showing one of the cylinders according to the present invention; Figure 5 is a cross-sectional view of the intraluminal blunt implant of the present invention placed in a blood conduit at the implant site in an abrupt condition; Figure 6 is a cross-sectional view similar to the view of Figure 5, showing the intra-1 uminal blunt implant implanted in a blood line; Figure 7 is a second embodiment of the intraluminal stitch graft according to the present invention; Figure 8 is a side elevational view of the first layer of material on a stage being treated in accordance with the method of the present invention; Figure 9 is a side elevational view showing the second layer of material on a shaped surface that is being maintained on the surface by reverse pressure in accordance with the method of the present invention; Figure 10 is a view similar to the view of Figure 9, showing the joining of the second layer to the first layer; and Figure 11 is a side elevation view showing the second layer attached to the first layer.

BEST MODE FOR CARRYING OUT THE INVENTION Referring now to the drawings, the present invention will now be described in detail. With reference to Figures 1 and 2, the intraluminal blunt graft of the present invention is indicated by the reference number 10. The blunt graft 10 includes a collapsible tube member 12 having a first end 14 and a second end 16. An outer layer of material 18 and an inner layer of material 20 extend between the first end 14 and the second end 16. A first end wall 22 extends between the outer layer 18 and the inner layer 20 at the first end 14. A second end wall 24 extends between the outer layer 18 and the internal layer 20 at the second end 16. As shown in Figures 1, 2 and 4, the outer layer 18 is ~ attached to the inner layer 20 to form a plurality of cylinders 30 extending longitudinally between the first end 14 and the second end 16. As shown in Fig. 1, the tube member 12 may include a chamber 32. that extends radially that is in common With the plurality of cylinders 30. In the present embodiment, the camera 32 is positioned adjacent the first end 14. However, it should be understood that the camera 32 may be placed in a variety of locations along the length of the the camera. Referring to Figure 1, the member 12 of your bo may include an opening 40 in the first end wall 22. The opening 40 can receive a fluid, such as air. As described below, the fluid causes the collapsed member 12 d to expand for implantation in a blood line. As shown in FIG. 3, a unidi? Ed valve 42, such as a recti? Cation valve, can be placed in the abutment 40. The valve 42 permits introduction of the fluid into the tube member 12. The valve prevents the escape of fluid from the tube member 12 after introduction to the tube member. The fluid can be introduced into the pipe member 12 through the valve 42 via a conduit 44 of f 1 or gone. Referring to Figure 2, the outer layer 18 the inner layer 20 is composed of a polymer material that is b iocompatible. An example of such material is polytetra f 1 uoreti leño. The outer layer 18 is constructed of a more flexible material or lighter weight than the inner layer 20. This allows the outer layer 18 to be more collapsible when expanded from the tube member 12. The inner layer 20 can be treated or coated with a material such as expanded polystyrene and expanded fiber (ePTFE) to create a surface more conductive to blood flow. As shown in Figure 2, each of the cylinders 30 includes a central line C extending longitudinally through the cylinder when the tube member 12 is in an expanded condition. The central line C is a point from which two radii R1 and R extend. The radii R, and R2 d end at a beta angle. The beta angle can be an obtus angle being more than 909 and less than 180 ?. When the plurality of cylinders 30 are placed adjacent to each other to form tube member 12, as shown in Figure 2, the radius R of one of the cylinders bisects the radius R of the adjacent cylinder. This arrangement causes the a plurality of cylinders 300 to maintain the tube member 12 in an expanded condition for implantation in a blood line. It has been found that the greater flexibility of the outer layer 18 and the greater material quantity of the outer layer 18 compared to the internal layer 20 causes the beta angle to be less than 180 °. When the tube member 12 expands, the plurality of cylinders 30 interfere with each other to force the member of the tube into a round configuration as shown in Figure 1. This provides an open path 46 for the flow of blood. in a blood tube. Referring now to Figures 5 and 6, the intraluminal blunt injury 10 of the present invention is implied in a blood conduit 50 by manipulating the collapsed tubing member 12 through the conduit to an implant site 52. The tube member can be manipulated by the conduit 44, which is in communication with the valve 42, or by some other suitable apparatus. As shown in Figure 6, when the stub graft 10 is in the proper position, the fluid from the duct 44 is introduced through the opening 40 and into the chamber 32 and cylinders 30. The chamber 32 allows a distribution fluid stream towards the cylinders 30. As described in the foregoing, the plurality of cylinders 30 and outer and inner layers 18 and 20, respectively, are cooperative to hold the tube member 12 in a round and open configuration. After filling, the conduit 44 is removed. The blunt graft 10 allows the flow of blood through the trajectory 46 at the implant site 52. A second embodiment of the intraluminal graft 10 of the present invention is shown in Figure 7. The incision graft 10 includes a portion 60 of trunk and portions 62 and 64 of branch. This modality can be used, for example, in the bifurcation of the aorta and iliac arteries.

The trunk portion 60 can be placed in the aorta and the branching portions 62 and 64 can be placed in the arteries. Many other configurations can be built, depending on the application. Referring now to Figures 8 to 11, the method for manufacturing an intraluminal graft according to the present invention will be described in detail. Having reference to Figure 8, a first layer of material 7 corresponding to the inner layer 20 is placed on a flat surface, such as a stage 71. A bonding agent, such as adhesive 76 is applied to the first layer 70 by the applicators 78. As shown in Figure 9, a second layer of material 80, corresponding to the outer layer 18, is placed on a surface 82 configured. The shaped surface 82 includes indentations 84 extending longitudinally, which have, for example, partially cylindrical shapes. The indentations include a coating 86 of resin-free polymers and products, such as Teflon, to prevent the second layer 80 from adhering to the shaped surface 82. The second layer 80 is held on the surface 82 formed by the use of reverse pressure or vacuum created by a reversible pump P. As shown in Figure 10, the second layer 80 s moves to the first layer 70. The layers 70 and 80 are fixed together by the adhesive 74. The layers can also be joined by a heat sealing process (not shown). As shown in Figure 11, the attachment of the first layer 70 to the second layer 80 forms a plurality of longitudinally extending cylinders, as described above. U chamber 30, walls 22 and end and opening 40 may also be formed in the method. The longitudinally extending ends of the bonded layers can be worn together and bonded by adhesive or otherwise to form the cylindrical tube member 12 shown in Figures 1 and 5. The first layer 70 and the second layer 80, as used in FIG. In the method, they can be constructed of a polymeric material, as described above for the outer layer 18 and the inner layer 20. The second layer 80 is more flexible and lighter in weight than the first layer 70. The cylinders 30 formed as a result of the method have the same characteristics as those described above in relation to the C-line centrica, the radii R1 and R? and the beta angle being less than 180 °. The present invention can be modified and changed in a variety of ways with the scope of the invention being nested by the attached clauses.

Claims

CLAIMS:

1. - An intraluminal stent graft for implant in a blood conduit, comprising: a collapsible tube member having a first end and a second end, an outer layer and an inner layer extending between the ends, the outer layer being more flexible than the inner layer, the outer layer being attached to the inner layer to form a plurality of cylinders extending longitudinally between the first end and the second end, the cylinders providing structural support to the bo member.

2. The intraluminal splinting graft of claim 1, wherein the collapsible tube further includes a first end network extending between the outer layer and the triple layer at the first end and a second end wall extending from the outer layer to the outer layer at the first end. between the outer layer and the inner layer in the second trem.

3. The intraluminal splinting graft of claim 2, wherein one of the end walls includes an abturation to receive a fluid.

4.- The intraluminal splinting graft of claim 3, where the fluid is air.

5. The intraluminal splinting graft of claim 3, wherein the spike graft further includes a voule placed in the opening to allow introduction of the fluid into the tube member and to prevent leakage of the fluid from the tube. of the tube member.

6. The stent graft of claim 1, wherein each of the cylinders includes a central line extending longitudinally through the cylinder, the center line being a point from which two radii extend, the spokes defining, an angle, the angle being less than 180 °.

7.- the intraluminal truncation graft of claim 6. wherein the plurality of cylinders are placed one adjacent to the other to form the tube member, the spokes of one of the cylinders bisecting the respective spokes of an adjacent cylinder, the cylinders cooperating to prevent the plurality of cylinders from falling out after the tube member has expanded.

8. The intraluminal truncation graft of claim 1. where the inner and outer layers are comprised of a polymeric material.

9. The intraluminal truncation graft of claim 8. wherein the material of the outer layer is lighter than the material of the inner layer.

10. A method for manufacturing an incision-intraluminal graft, comprising the steps of: (a) placing a first layer of material on a substantially planar surface; (b) placing a second layer of material on its configured surface; (c) maintaining the second layer on the surface confined by the use of reverse pressure; (d) moving the second layer to the first layer; (e) joining the second layer to the first layer to form a plurality of longitudinally extending cylinders; and (f) configuring the first and second layers to form a tube member.

11. The method of claim 10, wherein the material of the first layer is a polymeric material.

12. The method of claim 11, wherein the material of the second layer is a polymeric material.

13. The method of claim 12, wherein the material of the second layer is lighter than the material of the first layer.

14. The method of claim 10, wherein the configured surface is substantially cylindrical.

15. The method of claim 10, wherein each of the cylinders includes a central line extending longitudinally through the cylinder, the center line being a point from which two spokes extend, the spokes defining an angle , the angle being less than 1809.

16. - The method of claim 15, wherein the plurality of cylinders are positioned adjacent one another to form the tube member, the spokes of one of the cylinders bisecting respective spokes of an adjacent cylinder, the cylinders cooperating to prevent the plurality of cylinders is broken after the tube member has expanded.