OSTOMY APPLIANCE

Abstract: An ostomy appliance intended for attachment to a peri­ stomal area of a wearer includes a pad (20) of medical-grade skin-attachable adhesive material, a first coupling element (12) secured thereto, the element having a radially outwardly extending flange (30) attached to a surface of the pad and an upstanding rib (32) of closed loop form constructed to couple with a counterpart (second) coupling element (56) on a bag or pouch (64). An inner chute member (24) is located radially within and adjacent to the first coupling element, the chute member having a substantially cylindrical wall (72) covering the whole of the radially inner surface of the first coupling element. At one of its ends, the chute has a radially outwardly extending flange (70) positioned so that it traps the chute member in position when the two coupling elements are coupled together.

Description: This invention relates to a body-side ostomy appliance, for attachment to the peristomal area of a wearer, to permit removable attachment of a bag or pouch thereto. Ostomy appliances are known in which a coupling element on the bag is engaged with one on an adhesive pad, the latter being stuck onto the wearer. One successful design is that shown in Figs. 1-6 of United States Patent No. 4,460,363. An ostomy appliance which includes a chute surrounding a stomal orifice is disclosed in European Patent Application (EP-A)145,187. However, the present invention differs from this prior proposal in the way in which the chute is held in position. It is an aim of the invention to provide a design of ostomy appliance in which the chance of lodgment of faecal material in crevices of the appliance is greatly reduced, if, indeed, it is not wholly avoided. According to the invention, there is provided an ostomy appliance intended for attachment to a peristomal area of a wearer including a pad of medical-grade skin-attachable adhesive material, a first coupling element secured thereto, the element having a radially outwardly extending flange attached to a surface of the pad and an upstanding rib of closed loop form constructed to couple with a counterpart second coupling element on a bag or pouch, and an inner chute member located radially within and adjacent to the second coupling element, the chute member having a substantially cylindrical wall covering the whole of a radially inner wall of the second coupling element, characterised in that the chute member is movable relative to the first and second coupling elements and has, at one of its ends, a radially outwardly extending flange positioned so that it engages under the end of the radially inner wall of the second coupling element so trapping the chute member in position when the two coupling elements are coupled together. The present invention is applicable, with minor obvious modifications, to a variety of ostomy appliances, in particular those having a pair of interchangeable coupling elements, one on each of the pad and the pouch. In a preferred version of the invention, a first coupling element has a rib and the second coupling element has a channel surrounding the stomal orifice. The invention will be better understood from the following non-limiting description of an example thereof given with reference to the accompanying drawings in which:- Figure 1 is a front elevation view, omitting the bag or pouch, of two coupling elements together and including a chute member; and Figure 2 is a vertical axial cross-section, with the bag or pouch indicated diagramatically, through an assembled ostomy appliance showing two coupling elements and a chute member. The illustrated ostomy appliance according to the invention is intended for attachment to a peristomal area of a wearer and includes a pad 20 of medical grade skin-attachable adhesive material, a first coupling element 22, and a chute member 24. The pad 20 is substantially rectangular in form and may have on its rear surface 26 a stripable protective layer. As shown in Figure 2, a central stomal orifice 28 has been cut therein, but as sold to the purchaser, the pad may constitute a substantially continuous rectangular patch. The coupling element 22 comprises a radially outwardly extending flange 30 and a rib member 32 extending therefrom to encircle the stomal orifice. The rib 32 has a rim 34 thereon and an integral deflectable sealing strip 36. For a fuller description of the manner of operation of these parts attention is directed to the disclosure of United States patent 4,460,363. The first coupling element 22 is intended to cooperate with a second coupling element 56. This is of channel form and is annular also surrounding the stomal orifice. The second coupling element 56 has an inner wall 50, an outer wall 52 and a channel base 54. The axis of the ostomy appliance is indicated at 62. A pouch or bag is diagramatically indicated at 64. The bag wall 66 has a stomal aperture therein, and the wall 66 is secured to the second coupling element 56 in any suitable manner, for example by a a plastics weld seam indicated at 68. In accordance with the present invention, a chute member 24 is provided to guard against the possibility of faecal material becoming trapped in parts of the coupling. The preferred chute member 24 has a flange portion 70 which extends radially outwardly and underlies the assembled coupling elements 22 and 56 and the flange 70 is integral with a cylindrical tube or sleeve portion 72 which is located within and close to the inner wall 50 of the second coupling element 56. As can be seen best from Figure 2, presence of the chute member 24 wholly prevents or greatly minimizes the chance of any faecal material becoming lodged in the parts of the coupling and the crevices and recesses necessarily defined thereby.

Claims: An ostomy appliance intended for attachment to a peristomal area of a wearer including a pad (20) of medical-grade skin-attachable adhesive material, a first coupling element (22) secured thereto, the element having a radially outwardly extending flange (30) attached to a surface of the pad and an upstanding rib (32) of closed loop form constructed to couple with a counterpart second coupling element (56) on a bag or pouch, and an inner chute member (24) located radially within and adjacent to the second coupling element, the chute member having a substantially cylindrical wall (72) covering the whole of a radially inner wall (50) of the second coupling element, characterised in that the chute member (24) is movable relative to the first and second coupling elements and has, at one of its ends, a radially outwardly extending flange (70) positioned so that it engages under the end of the radially inner wall of the second coupling element so trapping the chute member (24) in position when the two coupling elements (22, 56) are coupled together. An appliance according to claim 1 in which the first coupling element (22) has an integral deflectable sealing strip (36) arranged at the free end of said upstanding rib (32), and in which the second coupling element (56) cooperates with the first coupling element and has a channel surrounding the stomal orifice.

Inventors: STEER, PETER LESLIE
Applicants: E.R. SQUIBB & SONS, INC.
Application year: 1986
Main classification: A61F5
IPC codes: A61F5