Body fluid flow control device

• US 20030212452A1
• Filed: 06/03/2003
• Published: 11/13/2003
• Est. Priority Date: 09/16/1997
• Status: Active Grant

• Current Assignee: Pulmonx Corp.
• Original Assignee: Emphasys Medical, Inc. (Pulmonx Corp.)
• Inventors: Zadno-Azizi, Gholam-Reza, Marano-Ford, April, Ford, John S.
• Granted Patent: US 7,276,077 B2
• Time in Patent Office: Days
• US Class Current: 623/1.24
• CPC Class Codes: A61F 2/0009 placed in or outside the body opening close to the surface of the body plugging an opening in the wall of a hollow or tubular organ A61B17/0057
• CPC Class Codes: A61F 2/0022 placed deep in the body opening occluding blood vessels by internal devices A61B17/12022
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2475 Venous valves
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2210/0033 electrically, e.g. heated by resistor

Abstract

A device to provide body fluid flow control in the form of a valve to be located within a duct or passageway. The device is controlled through pressure above a preselected threshold. Bulk resilience about a passageway in a valve body provides the mechanism for controlled flow. One-way valve operation may be provided through a flap or through a pressure differential on the valve body depending upon the direction of flow. A frame structure positioned within a resilient seal includes longitudinally elongate elements which may be of spring material, malleable material or heat recoverable material so as to accomplish an initial insertion state and an expanded anchoring state. A valve support transitions between the resilient seal portion and the valve body to insure that the states do not change the threshold opening pressure. Insertion devices may be employed to position and actuate a change of state of the frame in the body duct or passageway.

Claims

1. A body fluid flow control device for placement in a body lumen comprising:

a resilient seal of annular configuration;

a frame coupled to the resilient seal, the frame of circular cross-section and having a passageway extending longitudinally therethrough, the frame being movable between an insertion state and an anchoring state, the frame having a transverse dimension in the anchoring state larger than the transverse dimension in the insertion state, the resilient seal being movable with the frame and configured to seal with a wall of the body lumen in the anchoring state, at least a first portion of the frame having a generally cylindrical shape in the anchoring state so as to induce interfering engagement with a wall area of the body lumen to anchor the body fluid flow control device therein; and

a valve body coupled to the frame and having a passage therethrough in communication with the passageway in the frame, at least a first portion of the valve body being movable between an open configuration allowing fluid flow through the passage and a closed configuration restricting fluid flow through the passage, the first portion being resiliently biased into the closed configuration.

2. The body fluid flow control device of claim 1, wherein the seal is disposed between the first portion of the frame and the wall area of the body lumen in the anchoring state, the first portion of frame inducing interfering engagement between the seal and the wall area of the body lumen.

3. The body fluid flow control device of claim 1, wherein the frame is at least partially embedded within the seal.

4. The body fluid flow control device of claim 1, wherein the first portion of the frame has first and second ends, the wall area of the body lumen being engaged between the first and second ends, the first portion of the frame having a substantially constant outer diameter between the first and second ends.

5. The body fluid flow control device of claim 1, wherein the resilient seal is substantially cylindrical in the anchoring state.

6. The body fluid flow control device of claim 1, wherein the first portion of the frame is substantially cylindrical in the insertion state.

7. The fluid flow control device of claim 1, wherein the seal has a longitudinal length, the first portion of the frame being in engagement with the seal over substantially all of the seal'"'"'s longitudinal length.

8. The fluid flow control device of claim 1, further comprising a valve support connecting the valve body to the resilient seal.

9. The fluid flow control device of claim 1, wherein the valve support isolates the valve body from the resilient seal to avoid distortion of the valve body in the anchoring state.

10. The fluid flow control device of claim 1, wherein the frame is substantially entirely embedded in the resilient seal.

11. The fluid flow control device of claim 1, wherein the frame is resiliently expandable from the insertion state to the anchoring state.

12. The fluid flow control device of claim 1, wherein the frame is malleable and stretchable from the insertion state to the anchoring state.

13. The fluid flow control device of claim 1, wherein the frame is metallic.

14. The fluid flow control device of claim 1, wherein the frame comprises a shape memory alloy.

15. A body fluid flow control device for placement in a body lumen comprising:

a resilient seal of annular configuration defining a longitudinal passageway;

a frame of circular cross-section coupled to the resilient seal and movable between an insertion state and an anchoring state, the frame having a transverse dimension in the anchoring state larger than the transverse dimension in the insertion state and adapted for engaging the body lumen to anchor the body fluid flow control device therein, the resilient seal being movable with the frame and configured to seal with a wall of the body lumen in the anchoring state; and

a valve body coupled to the frame and having a passage therethrough in communication with the passageway, at least a first portion of the valve body being movable between an open configuration allowing fluid flow through the passage and a closed configuration restricting fluid flow through the passage, the first portion being resiliently biased into the closed configuration.

16. The body fluid flow control device of claim 15, wherein the first portion of the valve body moves from the closed configuration to the open configuration at a threshold pressure, the valve support being adapted to maintain the threshold pressure generally constant.

17. The body fluid control device of claim 15, additionally comprising a valve support connecting the valve body to the seal, wherein the valve support is an elastomeric material.

18. The body fluid control device of claim 16, wherein the valve support is integrally formed with the valve body.

19. The body fluid control device of claim 16, wherein the valve support is integrally formed with the resilient seal.

20. The body fluid control device of claim 16, wherein the valve support is disposed circumferentially around the valve body.

21. The body fluid control device of claim 15, wherein the valve body has a first outer diameter and the frame has a second outer diameter, the first outer diameter being substantially less than the second outer diameter.

22. The body fluid control device of claim 15, wherein the valve body is axially displaced from the frame.

23. The body fluid control device of claim 15, wherein the valve body is outside the passageway in the frame.

24. The body fluid control device of claim 15, wherein the resilient seal is disposed on an outer surface of the frame such that the resilient seal is disposed between the frame and the wall of the body lumen in the anchoring state.

25. The body fluid control device of claim 15, wherein the frame compresses the resilient seal against the wall of the body lumen in the anchoring state.

26. The body fluid control device of claim 15, wherein the valve body comprises a pair of walls separated by a slit, the walls being substantially parallel.

27. The body fluid flow control device of claim 15, wherein the frame is at least partially embedded within the resilient seal.