IMPLANTABLE FLUID MANAGEMENT DEVICE FOR THE REMOVAL OF EXCESS FLUID

• US 20090318844A1
• Filed: 10/31/2007
• Published: 12/24/2009
• Est. Priority Date: 11/03/2003
• Status: Active Grant

• Current Assignee: Sequana Medical NV
• Original Assignee: NovaShunt AG (Sequana Medical NV)
• Inventors: Burnett, Daniel R.
• Granted Patent: US 8,398,577 B2
• Time in Patent Office: Days
• US Class Current: 604/9
• CPC Class Codes: A61M 2202/0014 removed from the body
• CPC Class Codes: A61M 2202/0401 Ascitics
• CPC Class Codes: A61M 2205/04 implanted
• CPC Class Codes: A61M 2205/10 with powered movement mechanisms
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2210/1017 Peritoneal cavity
• CPC Class Codes: A61M 2210/1085 Bladder
• CPC Class Codes: A61M 27/002 Implant devices for drainage of body fluids from one part of the body to another intraocular A61F9/00781; middle ear A61F11/202
• CPC Class Codes: A61M 31/00 Devices for introducing or retaining media, e.g. remedies, in cavities of the body A61M25/00 takes precedence ; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008

Abstract

A device for removing fluid from a first bodily cavity and for directing that fluid into a second bodily cavity while avoiding risks of infection and, in one embodiment, excessive dehydration of the first bodily cavity. The device includes an uptake tube having a proximal end in fluid communication with the first bodily cavity and a distal end in fluid communication with a pump, and an outflow tube having a proximal end in fluid communication with the pump and a distal end in fluid communication with the second bodily cavity. The distal end of the uptake tube may be coupled to a reservoir configured to expand upon ingression of fluid into the reservoir and to contract upon removal of fluid due to a negative pressure provided by the pump.

Claims

1. An implantable fluid management device comprising:

an uptake tube having a proximal end in fluid communication with a first cavity of a patient'"'"'s body and a distal end in fluid communication with a pump; and

an outflow tube having a proximal end in fluid communication with the pump and a distal end in fluid communication with a second cavity of the patient'"'"'s body,

wherein the distal end of the uptake tube is coupled to a reservoir configured to expand upon ingression into the reservoir from the first body cavity and to contract upon removal of the fluid from the reservoir by the pump.

2. The implantable fluid management device of claim 1, wherein the reservoir comprises an outer surface having perforations disposed on at least a portion of the outer surface, the perforation providing for the ingression of the fluid from the first cavity into the reservoir.

3. The implantable fluid management device of claim 2, wherein at least some of the perforations are disposed in a recessed position in relation to the outer surface.

4. The implantable fluid management device of claim 2, further comprising a plurality of recesses disposed on at least a portion of the outer surface of the reservoir, the recesses promoting flow of the fluid from the first cavity towards at least some of the perforations.

5. The implantable fluid management device of claim 4, wherein at least a portion of the outer surface between the recesses includes a material or a coating favoring tissue ingrowth within the surface.

6. The implantable fluid management device of claim 2, wherein the perforations are configured to prevent ingression into the reservoir of predetermined components of the fluid.

7. The implantable fluid management device of claim 1, wherein the reservoir has an essentially hemispherical profile.

8. The implantable fluid management device of claim 7, wherein the uptake tube extends from an essentially flat portion of the hemispherical profile.

9. The implantable fluid management device of claim 7, wherein the uptake tube extends from a surface connecting an essentially curved portion of the hemispherical profile with an essentially flat portion of the hemispherical profile.

10. The implantable fluid management device of claim 1, wherein the reservoir has an essentially cylindrical profile.

11. The implantable fluid management device of claim 6, wherein the reservoir is configured to expand and contract along a longitudinal axis of the essentially cylindrical profile.

12. The implantable fluid management device of claim 1, wherein the reservoir includes a support structure.

13. The implantable fluid management device of claim 12, wherein the support structure provides for a recoil of the reservoir after contracting, the recoil promoting a n expansion of the reservoir after the removal of the fluid.

14. The implantable fluid management device of claim 1, further comprising means for preventing backflow from the outflow tube to the uptake tube.

15. The implantable fluid management device of claim 1, wherein the reservoir comprises a dehydration prevention element preventing actuation of the pump when the reservoir is in a contracted condition.

16. The implantable fluid management device of claim 1, wherein the reservoir includes a weight causing the reservoir to be disposed in a desired position within the first cavity after implantation of the device.

17. The implantable fluid management device of claim 1, wherein actuation of the pump is triggered by a sensor disposed in the reservoir, near the reservoir, or externally to the patient'"'"'s body.

18. The implantable fluid management device of claim 1, wherein actuation of the pump may be triggered or terminated by a device external to the patient'"'"'s body and configured to communicate wirelessly with the pump.

19. The implantable fluid management device of claim 1,

wherein the reservoir comprises a first reservoir element and a second reservoir element in fluid communication one with the other,

wherein each of the first and second reservoir elements is configured to contain fluid and to contract upon actuation of the pump,

wherein an annular surface couples the first element to the second element, the annular surface being configured like a groove defined by a portion of the first element and by a portion of the second element, and

wherein openings in the annular surface enable ingression of the fluid into the reservoir.

20. The implantable fluid management device of claim 19, wherein the first and second elements are each shaped like expandable disks having circumferential perimeters one parallel to the other, and wherein the annular surface is disposed parallel to the first and second elements.

21. The implantable fluid management device of claim 20, wherein the annular surface includes recesses disposed radially on an outer surface of the annular surface, and wherein the recesses direct flow of the fluid to the openings.

22. The implantable fluid management device of claim 21, wherein the recesses are symmetrically disposed on a portion of the first element and on a portion of the second element.

23. The implantable fluid management device of claim 22, wherein each of the openings is disposed on the annular surface between pairs of the recesses.

24. The implantable fluid management device of claim 23, wherein the recesses define ribs on an inner surface of the annular surface, the ribs favoring predetermined expansion and contraction directions of the reservoir.

25. The implantable fluid management device of claim 23, wherein the ribs extend continuously between the first element and the second element.