Abstract: An ostomy bag has a filter attached to it by a series of plural sequentially peelable adhesive annuli.

Abstract: A one-piece urostomy appliance has a drainage bag secured to an apertured flange which is in turn secured to an apertured adhesive pad. The body side of the apertured flange has a flexible skirt encircling the stoma aperture and located adjacent the radially inner boundary of the adhesive pad. The skirt is constructed and located to impede leakage of urine towards the adhesive pad.

Abstract: An improved ostomy appliance has two interengageable coupling elements, one of which (herein called the body side coupling element) is secured to a medical grade adhesive pad and the other side of which is secured to an ostomy bag. A flexible chute ring is interposed between the body side coupling element and the adhesive pad. The flexible chute ring is attached to a polymeric film surface of the pad at a first annular region and to the body side coupling element at a second annular region. The first annular region is located radially inwardly of the coupling element.