GAS FILTER AND RELEASE FOR OSTOMY APPLIANCE

• US 20160166424A1
• Filed: 05/08/2014
• Published: 06/16/2016
• Est. Priority Date: 05/09/2013
• Status: Active Grant

• Current Assignee: B Braun Medical SAS (B. Braun Holding GmbH & Co. KG)
• Original Assignee: Stimatix GI Ltd (B. Braun Holding GmbH & Co. KG)
• Inventors: HANUKA, David, OR, Meir, SOMMER, Refael, SHAVIT, Tamir
• Granted Patent: US 11,291,579 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2005/4415 venting by manual operation
• CPC Class Codes: A61F 5/4405 Valves or valve arrangements specially adapted therefor A61F5/441 takes precedence; Fluid inlets or outlets A61F5/4407 takes precedence
• CPC Class Codes: A61F 5/4407 Closure means other than valves
• CPC Class Codes: A61F 5/441 having venting or deodorant means, e.g. filters ; having antiseptic means, e.g. bacterial barriers
• CPC Class Codes: A61F 5/445 Colostomy, ileostomy or urethrostomy devices A61F5/441, A61F5/442, A61F5/443 take precedence
• CPC Class Codes: A61F 5/448 Means for attaching bag to seal ring
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29L 2031/753 Medical equipment; Accessories therefor bloodbags, medical bags B29L2031/7148; artificial eyes B29L2011/0008

Abstract

Ostomy appliance components providing filtered release of gasses from a surgical stoma. Filter shape, positioning, and positioning structure relate to potential advantages in manufacturing and operation of components.

Claims

1. An ostomy appliance with a gas release valve, comprising:

an ostomy appliance lumenal sidewall forming part of an enclosure for a stoma and having an aperture passing through said sidewall;

a valve member crossing most of the way through said sidewall aperture and including;

a stopper positioned to block gas outflow through said aperture, and

a control member operable from the exterior of said ostomy appliance to unblock said aperture.

2. The ostomy appliance with a gas release valve of claim 1, wherein said valve member comprises a connecting member connecting said stopper to said control member across said aperture.

3. The ostomy appliance with a gas release valve of claim 2, wherein said stopper, said control member, and said connecting member are integrally formed.

4. The ostomy appliance with a gas release valve of any one of claim 2 or 3, wherein said connecting member is elastic, and under tension urges said stopper into said blocking position.

5. The ostomy appliance with a gas release valve of any one of claims 1-4, wherein said lumenal wall is deformed in compression against said stopper in said blocking position.

6. The ostomy appliance with a gas release valve of claim 1, comprising a spring in compression urging said stopper into said blocking position.

7. The ostomy appliance with a gas release valve of claim 1, comprising a spring in tension urging said stopper into said blocking position.

8. The ostomy appliance with a gas release valve of any one of claims 6-7, wherein said stopper, said control member, and said spring are integrally formed.

9. The ostomy appliance with a gas release valve of any one of claims 1-8, wherein said stopper comprises a filter body providing a portion of a passageway for gas outflow across said lumenal wall, and said blocking position prevents gas outflow passing around said filter body.

10. The ostomy appliance with a gas release valve of any one of claims 1-9, wherein said gas outflow is blocked only below a predetermined threshold of a safe interior pressure.

11. The ostomy appliance with a gas release valve of claim 10, wherein an interior pressure of said ostomy appliance presses against said stopper to move it from said blocking position above a predetermined threshold of pressure.

12. The ostomy appliance with a gas release valve of any one of claims 10-11, wherein said predetermined threshold of a safe interior pressure is between 50 mmHg and 100 mmHg.

13. The ostomy appliance with a gas release valve of any one of claims 1-12, wherein said blocking position comprises said stopper being pressed against an interior surface of said lumenal wall.

14. The ostomy appliance with a gas release valve of claim 1, wherein said blocking position comprises said stopper pressed against an exterior surface of said lumenal wall.

15. The ostomy appliance with a gas release valve of claim 1, wherein said stopper comprises a member extending mostly through said aperture, and operation to move said stopper out of said blocking position comprises a rotation.

16. The ostomy appliance with a gas release valve of claim 15, wherein said control member comprises an external lever attached to said elongated member, and said lever is operable to rotate said extending member of the stopper so that gas is releasable.

17. The ostomy appliance with a gas release valve of any one of claims 1-14, wherein said stopper comprises a region flaring toward one end of said valve member, and said blocking position comprises the narrow end of said flared region being at least partially inserted to said aperture, forming a seal therewith.

18. The ostomy appliance with a gas release valve of any one of claims 1-17, wherein said stoma is separated from said stopper by a gas-permeable sealing element.

19. The ostomy appliance with a gas release valve of claim 18 wherein said being separated comprises blockage of solid and liquid waste from reaching said stopper from said stoma.

20. The ostomy appliance with a gas release valve of any one of claims 1-19 wherein said lumenal wall comprises a thickness of at least 3 mm through which said connecting member extends.

21. An ostomy appliance with a filter element, comprising:

a sidewall defining a first lumen enclosing a stoma; and

a filter element held in an at least second lumen;

said second lumen being an aperture in the sidewall connecting the first lumen to the ostomy appliance exterior.

22. The ostomy appliance with a filter element of claim 21, wherein:

the wall of said second lumen comprises portions of a base element and a cover element;

said filter element contacts both the base element and the cover element; and

said base element and said cover element are directly attached to each other on either side of said filter element.

23. The ostomy appliance with a filter element of claim 21, wherein

said second lumen comprises a pocket region lined by portions of a base element and a cover element;

and

said base element and said cover element enclose said filter element within a circumferentially extending pocket closed on at least two circumferential sides.

24. The ostomy appliance with a filter element of any one of claims 21-23, wherein an end of said first lumen is closed, and said aperture in said sidewall is flush against an interior surface of said closed end.

25. The ostomy appliance with a filter element of claim 22, wherein said cover element inserts into a recess of said base element to form said second lumen.

26. The ostomy appliance with a filter element of any one of claims 21-25, wherein said filter element is replaceable in said second lumen during operation of said ostomy appliance.

27. The ostomy appliance with a filter element of any one of claims 21-26, wherein an input channel in fluid communication with an input surface of said filter element separates said input surface from said first lumen.

28. The ostomy appliance with a filter element of claim 27, wherein said input channel comprises a membranous material attached over a base element.

29. The ostomy appliance with a filter element of claim 27, wherein said input channel comprises a recessed surface covered by a closure element to form a lumen.

30. The ostomy appliance with a filter element of claim 27, wherein said input channel comprises hydrophobic surfaces.

31. The ostomy appliance with a filter element of claim 30, wherein said hydrophobic surfaces comprise an aperture small enough to exclude water under pressure of its own weight to the depth of the radius of said first lumen.

32. The ostomy appliance with a filter element of claim 27, wherein said input channel comprises at least one valve between said input surface and said first lumen which closes when a pressure outside the input channel rises relative to a pressure inside the input channel.

33. The ostomy appliance with a filter element of claim 27, wherein said input channel comprises at least one valve between said input surface and said first lumen which opens when a pressure outside the input channel rises relative to a pressure inside the input channel.

34. The ostomy appliance with a filter element any one of claims 32-33, wherein said valve is a flutter valve.

35. The ostomy appliance with a filter element of any one of claims 32-34, wherein the filter element protrudes into said first lumen.

36. The ostomy appliance with a filter element of any one of claims 22-35, wherein said filter element comprises an open region through which said sidewall base element and cover element directly connect.

37. The ostomy appliance with a filter element of any one of claims 22-36, wherein the whole input surface by which gas enters said filter element from said first lumen is radially offset from the closest part of the exit surface by which gas leaves said filter element to the exterior.

38. The ostomy appliance with a filter element of claim 21, wherein said second lumen comprises portions of the sidewall molded around said filter element.

39. The ostomy appliance with a filter element of claim 21, wherein the positioning of said filter element does not prevent the flow of waste through said first lumen.

40. The ostomy appliance with a filter element of claim 21, comprising a waste collection pouch, wherein said first lumen is configured to channel waste to enter said waste collection pouch, and said second lumen provides a channel avoiding said pouch.

41. The ostomy appliance with a filter element of claim 21, wherein the input surface of said filter element on the side of said first lumen extends in one direction at least 5 times the extent of said surface in another direction.

42. The ostomy appliance with a filter element of claim 21, wherein at least one surface of said filter element is laminated.

43. A method for manufacturing an ostomy appliance holding a filter element comprising:

placing a filter element against an end portion of a sidewall defining a lumen of a first holding part comprised in said ostomy appliance;

placing a second holding part against said filter element and said first holding part; and

attaching said first and second holding parts together;

such that said filter is held between said first and second holding parts.

44. The method of claim 43, wherein said attaching is by pressing said first and second holding parts with a welding tool.

45. The method of claim 44, wherein said welding tool does not press on at least one of said first and second holding parts over a region of said filter element.

46. The method of claim 44, wherein said welding tool presses with reduced pressure on said first and second holding parts over a region of said filter element.

47. The method of any one of claims 44-45, wherein said welding tool does not seal together said first and second holding parts over a region leading to said filter element from the lumen of said first holding part.

48. A method for manufacturing an ostomy appliance holding a filter element comprising:

placing a second holding part against a sidewall defining a lumen of a first holding part comprised in said ostomy appliance;

attaching said first and second holding parts together, leaving therebetween an aperture sized to hold said filter element; and

inserting said filter element into said aperture;

such that

the body of said filter element comprises a principle path of gas conductance through said aperture.

49. The method of claim 48, wherein said attaching is by pressing said first and second holding parts with a welding tool.

50. The method of claim 49, wherein said welding tool presses with reduced pressure on said first and second holding parts over a region of said aperture.