Controlled discharge ostomy appliance and moldable adhesive wafer

• US 8,460,259 B2
• Filed: 11/01/2011
• Issued: 06/11/2013
• Est. Priority Date: 11/02/2010
• Status: Active Grant

• Current Assignee: Convatec Incorporated (ConvaTec Group Plc)
• Original Assignee: Convatec Incorporated (ConvaTec Group Plc)
• Inventors: Tsai, Mingliang Lawrence
• Primary Examiner(s): Hand, Melanie
• Assistant Examiner(s): Lo, Andrew S
• Application Number:
  US13/286,774
• Publication Number:
  US 20120109086A1
• Time in Patent Office: 588 Days
• Field of Search: None
• US Class Current: 604/335
• 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 5/448 Means for attaching bag to seal ring

Abstract

A controlled discharge ostomy appliance is described for use with an adhesive body fitment. The body fitment comprises an adhesive wafer having a stomal aperture that is manually shapeable by folding or rolling back a rim portion of the adhesive around the stomal aperture.

Claims

1. A controlled discharge ostomy appliance comprising:

a housing;

a stoma seal comprising a first seal wall and a second seal wall, the second seal wall having a seal-contact aperture therein, and the first seal wall having a stoma contact face for containing a stoma, in use, through the seal-contact aperture of the second seal wall;

a seal support for urging the stoma seal towards a stoma.

2. The controlled discharge ostomy appliance of claim 1, wherein the second seal wall overlaps a peripheral region of the stoma contact face of the first wall.

3. The controlled discharge ostomy appliance of claim 1, wherein the aperture of the second seal wall is smaller than the size of the stoma contact face of the first seal wall.

4. The controlled discharge ostomy appliance of claim 1, further comprising a flatus vent passage at the interface between the first seal wall and the second seal wall for permitting passage of flatus therethrough.

5. The controlled discharge ostomy appliance of claim 4, further comprising at least one exit spaced from the seal-contact aperture for permitting flatus entering the flatus vent passage at the seal-contact aperture to escape via the exit.

6. The controlled discharge ostomy appliance of claim 5, wherein the at least one exit is selected from:

a clearance between the seal walls;

an aperture in the second seal wall;

a discontinuity in a joint between the seal walls; and

a slit in the second seal wall.

7. The controlled discharge ostomy appliance of claim 1, wherein the contact face of the first seal wall is displaceable relative to the aperture of the second seal wall.

8. The controlled discharge ostomy appliance of claim 1, wherein the first seal wall is attached relative to the second seal wall only at one or more regions spaced away from the aperture.

9. The controlled discharge ostomy appliance of claim 5, wherein said spacing is at least 5 mm from the periphery of the aperture.

10. The controlled discharge ostomy appliance of claim 1, wherein the first and second seal walls have the same general configuration.

11. The controlled discharge ostomy appliance of claim 10, wherein the configuration is selected from top-hat shaped with a flange;

and top-hat shaped without a flange.

12. The controlled discharge ostomy appliance of claim 1, wherein the first and second walls nest one within the other.

13. The controlled discharge ostomy appliance of claim 1, wherein the first and second seal walls have substantially different shapes.

14. The controlled discharge ostomy appliance of claim 1, wherein the second seal wall has a washer shape.

15. The controlled discharge ostomy appliance of claim 1, wherein the seal support comprises a resilient member for urging the stoma seal towards the stoma.

16. The controlled discharge ostomy appliance of claim 15, wherein the seal support further comprises a fluid-containing chamber, and at least one fluid-transfer port for controlling fluid-flow with respect to the chamber, to define a fluid-damping characteristic for the seal support.

17. The controlled discharge ostomy appliance of claim 16, wherein the first seal wall defines at least a part of a wall of the fluid-containing chamber.

18. The controlled discharge ostomy appliance of claim 1, further comprising a waste collector, the waste collector being distensible and bounding an interior space of the appliance, wherein the first and second seal walls are received within said interior space bounded by the waste collector.

19. In combination:

a controlled discharge ostomy appliance; and

an adhesive body fitment for mounting the controlled discharge ostomy appliance at a stoma,

wherein;

the adhesive body fitment comprises an adhesive wafer having a stomal aperture that is manually shapeable by folding or rolling back a rim portion of the adhesive around the stomal aperture and, at least after shaping, the adhesive presents an exposed adhesive surface portion facing towards the controlled discharge ostomy appliance; and

the controlled discharge ostomy appliance comprises a stoma seal, urged towards the stomal aperture of the wafer for sealing against a stoma in use, the stoma seal comprising a first seal wall and a second seal wall, the second seal wall having a seal-contact aperture therein, and the first seal wall having a stoma contact face for contacting a stoma, in use, through the seal-contact aperture of the second seal wall, the second seal wall being configured to shield the first seal wall to obstruct the first seal wall adhering to said exposed adhesive surface portion of the wafer facing towards the controlled discharge ostomy appliance.

20. The combination of claim 19, wherein the adhesive wafer has an adhesive skin-facing surface and an adhesive non-skin-facing surface portion.

21. The combination of claim 19, wherein the controlled discharge ostomy appliance comprises a waste collector, the waste collector being distensible and bounding an interior space of the appliance, wherein the first and second seal walls are received within said interior space bounded by the waste collector.

22. The combination of claim 19, wherein the controlled discharge ostomy appliance and the adhesive body fitment for mounting the controlled discharge ostomy appliance at a stoma are two separate appliances.

23. The combination of claim 19, wherein the controlled discharge ostomy appliance and the adhesive body fitment for mounting the controlled discharge ostomy appliance at a stoma are one unit.

24. A seal unit for use in a controlled discharge ostomy appliance, the seal unit comprising:

a fluid-containing chamber defined at least partly by a flexible first seal wall, the first seal wall having a seal face for contacting a stoma in use;

a resilient member received within the fluid-containing chamber;

a flexible second seal wall covering a portion of the first seal wall to shield the first seal wall, the second seal wall having a seal-contact aperture therein exposing at least a portion of the seal face of the first seal wall, such that, in use, the seal face of the first seal wall contacts a stoma through the seal-contact aperture of the second seal wall.

25. The seal unit of claim 24, further comprising at least one flatus vent passage between the first and second seal walls.

26. The seal unit of claim 24, wherein the first and second seal walls are attached with respect to each other at a location spaced from the seal contact-aperture.

27. In combination:

a controlled discharge ostomy appliance; and

an adhesive accessories to be applied at peristomal skin around a stoma which would allow direct contact of adhesive accessories with the controlled discharge ostomy appliance at a stoma,

wherein;

the controlled discharge ostomy appliance comprises a stoma seal urged towards the stomal aperture of the wafer for sealing against a stoma in use, the stoma seal comprising a first seal wall and a second seal wall, the second seal wall having a seal-contact aperture therein, and the first seal wall having a stoma contact face for contacting a stoma, in use, through the seal-contact aperture of the second seal wall, the second seal wall being configured to shield the first seal wall to obstruct the first seal wall adhering to said exposed adhesive surface portion of the adhesive accessories.

28. The combination of claim 27, wherein the adhesive accessories is an hydrocolloid cohesive seal which can be molded and shaped to create a close contact to stoma and to protect the peristomal skin.

29. The combination of claim 27, wherein the adhesive accessories is an adhesive powder.