# US 2017/0281397 A1 · Seal for controlled evacuation ostomy appliance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0281397 A1 - Document ID: US20170281397A1 - Status: Published application - Kind: A1 - Application number: 15/464,243 - Filed: 2017-03-20 - Published: 2017-10-05 - Earliest claimed: 2004-09-16 - Assignees: Convatec Technologies Inc. - Applicants: ConvaTec Technologies Inc. - Inventors: Geraint Davies; John Cline; Christopher C. Gregory; Alan Cucknell; Julian Scarfe; Pete Cauwood - Web page: https://patentgrep.com/patent/US20170281397A1 ## CPC - A61F 5/441: having {venting or} deodorant means, e.g. filters {; having antiseptic means, e.g. bacterial barriers} - A61F 5/445: Colostomy, {ileostomy or urethrostomy} devices (A61F5/441, A61F5/442, A61F5/443 take precedence) - A61F 5/4404: {Details or parts} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A stoma seal is described for a controlled evacuation ostomy appliance. The stoma seal may have a liquid-responsive property, such as hydrophobic, hydrophilic or absorptive. The stoma seal may have a non-smooth surface, e.g., at a microstructure scale. The non-smooth surface may consist of tortuous channels, protruding seals, or a confronting apertured or porous layer. The liquid-responsive property and/or the non-smooth surface may facilitate separation of flatus from faecal matter and/or facilitate venting of flatus while obstructing stool. ## Claims ### Claim 1 A stoma seal for a controlled evacuation ostomy appliance, the stoma seal being configured to provide a liquid responsive property, in use to facilitate separation of flatus from faecal matter in contact with the stoma seal. ### Claim 2 (depends on 1) The stoma seal of claim 1, wherein the liquid responsive property is repulsion of liquid. ### Claim 3 (depends on 2) The stoma seal of claim 2, wherein the stoma seal comprises or carries hydrophobic material. ### Claim 4 (depends on 1) The stoma seal of claim 1, wherein the liquid responsive property is attraction of liquid. ### Claim 5 (depends on 4) The stoma seal of claim 4, wherein the stoma seal comprises or carries hydrophilic material. ### Claim 6 (depends on 1) The stoma seal of claim 1, wherein the liquid responsive property is absorption of liquid. ### Claim 7 (depends on 6) The stoma seal of claim 6, wherein the stoma seal comprises or carries a superabsorbent material. ### Claim 8 (depends on 1) The stoma seal of claim 1, wherein the stoma seal comprises or carries carbon. ### Claim 9 (depends on 1) The stoma seal of claim 1, wherein the stoma seal has a non-smooth surface. ### Claim 10 (depends on 1) The stoma seal of claim 1, wherein an external surface of the stoma seal has the liquid responsive property. ### Claim 11 (depends on 1) The stoma seal of claim 1, wherein the stoma seal is at least party porous, and an internal surface of the stoma seal has the liquid responsive property. ### Claim 12 A stoma seal for a controlled evacuation ostomy appliance, the stoma seal comprising a non-smooth surface. ### Claim 13 (depends on 12) The stoma seal of claim 12, wherein the non-smooth surface is configured in use to facilitate separation of flatus from faecal matter in contact with the stoma seal. ### Claim 14 (depends on 12) The stoma seal of claim 12, wherein the non-smooth surface is an external surface of the stoma seal. ### Claim 15 (depends on 12) The stoma seal of claim 12, wherein the stoma seal is at least partly porous, and the non-smooth surface is an internal surface of the stoma seal. ### Claim 16 (depends on 12) The stoma seal of claim 12, wherein the non-smooth surface comprises a micro structure. ### Claim 17 (depends on 12) The stoma seal of claim 12, wherein the non-smooth channels comprise a plurality of channels. ### Claim 18 (depends on 17) The stoma seal of claim 17, wherein the channels are tortuous. ### Claim 19 (depends on 17) The stoma seal of claim 17, wherein the channels lead generally in a direction extending outwardly from the stoma. ### Claim 20 (depends on 12) The stoma seal of claim 12, wherein the non-smooth surface comprises a plurality of protruding seals. ### Claim 21 (depends on 20) The stoma seal of claim 20, wherein the seals are selected as one or more of: ridges; flaps; ribs. ### Claim 22 (depends on 20) The stoma seal of claim 20, wherein the seals are arranged generally transverse to a direction of flatus flow from the stoma. ### Claim 23 (depends on 20) The stoma seal of claim 20, wherein the seals are arranged in a generally concentric configuration. ### Claim 24 (depends on 12) The stoma seal of claim 12, wherein the non-smooth surface as a non-flat surface contour. ### Claim 25 (depends on 12) The stoma seal of claim 12, wherein the stoma seal comprises a confronting cover layer, the cover layer being porous or apertured, whereby the cover layer provides the non-smooth surface. ### Claim 26 (depends on 25) The stoma seal of claim 25, wherein the confronting cover layer has a mesh or net configuration. ### Claim at position 27 -30. (canceled)