Ostomy appliance

Patent metadata

Field	Value
Publication number	US-12594181-B2
Application number	US-202017062063-A
Country	US
Kind code	B2
Filing date	Oct 2, 2020
Priority date	Oct 4, 2019
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

An ostomy appliance that has inner and outer walls of flexible sheet material. The inner wall has a stomal inlet and the outer wall has a gas vent. A separation wall is between the inner and outer walls forming separate first and second chambers and has a liquid and gas permeable separation filter. In use the first chamber is arranged to receive stomal output directed into the ostomy appliance via the stomal inlet. The separation filter is arranged to communicate, from the stomal output in the first chamber, stomal liquid and stomal gas to the second chamber. The gas vent is arranged to allow the stomal gas to migrate from the second chamber to outside of the ostomy appliance.

First claim

The invention claimed is:

1 . An ostomy appliance comprising:
inner and outer walls of flexible sheet material, the inner wall comprising a stomal inlet and the outer wall comprising a gas vent; a separation wall between the inner and outer walls forming separate first and second chambers and comprising a liquid and gas permeable separation filter, the separation filter at least partially extending across a lower half of the ostomy appliance; a protective structure located within the second chamber and comprising a protective panel attached to the outer wall and forming a protective chamber around the gas vent, the protective panel comprising an impervious flexible sheet; and a protective chamber gas inlet comprises at least one through-hole or cut-out located in the protective panel for allowing the stomal gas to migrate from the second chamber into the protective chamber and a protective chamber liquid outlet formed between the protective panel and at least one wall to which the protective panel is attached for allowing the stoma liquid to migrate out of the protective chamber, where the protective chamber liquid outlet is located along a lower edge of the protective chamber, below the gas vent, and is formed within an attachment region between the protective panel and the outer sheet, such that any stoma liquid in the protective chamber is directed to migrate out of the protective chamber via the liquid outlet, and wherein, in use:
the first chamber is arranged to receive stomal output directed into the ostomy appliance via the stomal inlet;
the separation filter is arranged to communicate, from the stomal output in the first chamber, stoma liquid and stomal gas to the second chamber; and
the gas vent is arranged to allow the stomal gas to migrate from the second chamber through the protective chamber to outside of the ostomy appliance.

2 . The ostomy appliance as claimed in claim 1 wherein the separation filter comprises an array of wall apertures.

3 . The ostomy appliance as claimed in claim 2 wherein the maximum diameter of each wall aperture is in the range of from about 0.03 mm to about 0.8 mm inclusive;
wherein the spacing between adjacent wall apertures in the array is in the range of from about 0.8 mm to about 2.2 mm;
wherein the array of wall apertures have an entirely stochastic distribution.

4 . The ostomy appliance as claimed in claim 1 wherein the separation filter extends across at least 50%, at least 75% or at least 90% of the surface area of the separation wall and wherein the separation wall extends across at least 50%, at least 75% or all of the surface area of the inner and/or outer walls.

5 . The ostomy appliance as claimed in claim 1 wherein the separation filter extends between:
the lower half or lower quarter of the separation wall and/or inner and outer walls; and
the upper half or upper quarter of the separation wall and/or inner and outer walls.

6 . The ostomy appliance as claimed in claim 1 wherein the first and second chambers are sealed from one another other than via the separation filter.

7 . The ostomy appliance as claimed in claim 1 wherein the separation wall at least partially extends across a lower half or lower quarter of the ostomy appliance.

8 . The ostomy appliance as claimed in claim 1 wherein the separation wall comprises a non-perforated area at least partially surrounded by the separation filter and aligned with the stomal inlet.

9 . The ostomy appliance as claimed in claim 1 wherein the separation wall is attached to the inner wall by at least one first attachment region arranged to hold the separation wall to the inner wall when the ostomy appliance is inflated such that an open volume is created between the separation wall and outer wall.

10 . The ostomy appliance as claimed in claim 1 further comprising a retractable drain and the separation wall extends at least partially into the retractable drain, wherein the retractable drain is configurable in:
a retracted position in which the first and second chambers are sealed from one another, other than via the separation filter, by the retractable drain such that the stomal output, stomal liquid and stomal gas are prevented from exiting the first and second chambers via the retractable drain and the stomal liquid and stomal gas can only be communicated from the first chamber to the second chamber via the separation filter; and
an extended position in which the stomal output, stomal liquid and stomal gas are able to exit the first and second chambers via the retractable drain.

11 . The ostomy appliance as claimed in claim 1 wherein the separation wall comprises one or more pleats configured to partially or fully unfold as the first chamber receives the stomal output.

12 . The ostomy appliance according to claim 11 wherein the one or more pleats is configured to partially or fully unfold as the cavity receives the stomal output to promote displacement of a first lateral region and a second lateral region of the ostomy appliance towards the body of the ostomate.

13 . The ostomy appliance according to claim 12 wherein the first lateral region, and the second lateral region are two opposed lateral regions and the conformation of the inner wall produces an improved conformation of the inner wall to a torso of the ostomate.

14 . The ostomy appliance according to claim 11 wherein each pleat comprises a generally Z-shaped form having two distinct folds.

15 . The ostomy appliance according to claim 11 wherein the one or more pleats comprise two pleats which are arranged symmetrically about a vertical midline of the outer wall and aligned with fold lines of the inner wall and/or the outer wall.

16 . The ostomy appliance according to claim 1 wherein the protective chamber gas inlet and the protective chamber liquid outlet are located below the gas vent and the at least one through-hole or cut-out comprises a plurality of panel apertures in the protective panel.

17 . A method of manufacturing an ostomy appliance comprising:
inner and outer walls of flexible sheet material, the inner wall comprising a stomal inlet and the outer wall comprising a gas vent; a separation wall between the inner and outer walls forming separate first and second chambers and comprising a liquid and gas permeable separation filter, the separation filter at least partially extending across a lower half of the ostomy appliance; and a protective structure located within the second chamber and comprising a protective panel attached to the outer wall and forming a protective chamber around the gas vent, the protective panel comprising an impervious flexible sheet; and a protective chamber gas inlet comprises at least one through-hole or cut-out located in the protective panel for allowing the stomal gas to migrate from the second chamber into the protective chamber and a protective chamber liquid outlet formed between the protective panel and at least one wall to which the protective panel is attached for allowing the stoma liquid to migrate out of the protective chamber, where the protective chamber liquid outlet is located along a lower edge of the protective chamber, below the gas vent, and is formed within an attachment region between the protective panel and the outer sheet, such that any stoma liquid in the protective chamber is directed to migrate out of the protective chamber via the liquid outlet, and wherein, in use:
the first chamber is arranged to receive stomal output directed into the ostomy appliance via the stomal inlet;
the separation filte

Assignees

• Convatec Ltd

Inventors

• Hoggarth Marcus
• Poyntz Oliver
• Emsley Kimahni
• Sanghera Daljinder

Classifications

• A61F5/445 Primary

  Colostomy, {ileostomy or urethrostomy} devices (A61F5/441, A61F5/442, A61F5/443 take precedence) · CPC title

• A61F5/4405

  Valves or valve arrangements specially adapted therefor (A61F5/441 takes precedence); Fluid inlets or outlets (A61F5/4407 takes precedence) · CPC title

• A61F5/4404

  Details or parts · CPC title

• A61F5/441 Primary

  having {venting or} deodorant means, e.g. filters {; having antiseptic means, e.g. bacterial barriers} · CPC title