Claims
- 1. A medical device, comprising:
a first frameless membrane having a first membrane sealing surface; and a second frameless membrane having a second membrane sealing surface, the first frameless membrane and the second frameless membrane implantable in a body lumen and deformable between a first position under antegrade fluid flow and a second position under retrograde fluid flow, where in the second position the first membrane sealing surface and the second membrane sealing surface meet to resist fluid flow.
- 2. The medical device of claim 1, first frameless membrane and the second frameless membrane are symmetrically implantable in the body lumen.
- 3. The medical device of claim 1, the first frameless membrane and the second frameless membrane each include an anchoring element.
- 4. The medical device of claim 3, where in the first position the anchoring element cause the first frameless membrane and the second frameless membrane to form a gap between the first frameless membrane and the second frameless membrane and a wall of the body lumen.
- 5. The medical device of claim 3, wherein the anchoring element includes a radiopaque material.
- 6. The medical device of claim 3, wherein the anchoring element is configured to embed within the body lumen.
- 7. The medical device of claim 3, wherein the anchoring element is configured to penetrate through the body lumen.
- 8. The medical device of claim 1, wherein the first membrane sealing surface and the second membrane sealing surface are formed of a material more flexible than other portions of the first frameless membrane and the second frameless membrane.
- 9. The medical device of claim 1, wherein the first frameless membrane and the second frameless membrane include a radiopaque material.
- 10. The medical device of claim 1, wherein the first frameless membrane and the second frameless membrane each define a portion of a cone.
- 11. The medical device of claim 10, wherein the first frameless membrane and the second frameless membrane each include an anchoring element adjacent to a vertex of the cone.
- 12. A method comprising:
positioning two or more frameless membranes in a body lumen, each membrane invertibly deformable between a first position and a second position, wherein at least one frameless membrane is invertible in response to the direction of fluid flow through the lumen relative to the membrane in the first position.
- 13. The method of claim 12, including positioning the two or more frameless membranes symmetrically in the body lumen.
- 14. The method of claim 12, wherein the two or more frameless membranes include an anchoring element, the method further including:
penetrating the anchoring element through the body lumen.
- 15. The method of claim 12, wherein the two or more frameless membranes include an anchoring element, the method further including:
embedding the anchoring element of at least one frameless membrane into the body lumen.
- 16. A medical system, comprising:
a first frameless membrane; an elongate catheter including a central portion including a first groove surrounded by a retractable sheath, the first frameless membrane positioned in the first groove between the retractable sheath and the central portion; and a first push rod extending through the elongate catheter to the first groove to contact and extend the first frameless membrane from the elongate catheter.
- 17. The medical system of claim 16, wherein the first frameless membrane includes an anchoring element, where the first push rod contacts the anchoring element of the first frameless membrane.
- 18. The medical system of claim 17, wherein the first push rod pushes the anchoring element of the first frameless membrane from an opening of the first groove.
- 19. The medical system of claim 18, wherein the retractable sheath fully retracts to expose the first and second frameless membranes.
- 20. The medical system of claim 16, further including:
a second frameless membrane including an anchoring element, wherein the central portion of the elongate catheter further includes a second groove, the second frameless membrane positioned in the second groove between the retractable sheath and the central portion; and a second push rod extending through the elongate catheter to the second groove to contact the anchoring element and extend the second frameless membrane from the elongate catheter.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. Application Ser. No. 10/115,557, filed Apr. 3, 2002, now U.S. Pat. No. 6,752,828 issued Jun. 22, 2004, the specification of which is incorporated herein by reference.
Continuations (1)
|
Number |
Date |
Country |
Parent |
10115557 |
Apr 2002 |
US |
Child |
10873052 |
Jun 2004 |
US |