An ostomy appliance including an adhesive barrier member having a hole for receiving a stoma, ureter, or catheter, an outer receiving member or bag releasably attached to the adhesive barrier member, and a disposable inner bag liner releasably attached to the adhesive barrier member. A single base coupling ring is attached to the barrier member and includes a first coupling area on an inner surface thereof, relative to the hole, and a second coupling on an outer surface thereof. The inner bag, which is coupled to the barrier member using an inner bag coupling ring, is coupled to the barrier member at the first coupling area and the outer receiving member is coupled to the barrier member at the second coupling area, such that both the inner bag and outer receiving member are mounted on the same single barrier member ring.
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