An ostomy pouch is a medical device that allows a way to collect waste from a biological system (bladder, ileum, colon) that's been surgically diverted and utilizes a stoma. Ostomy pouching systems are most frequently associated with urostomies, ileostomies, and colostomies. They most commonly consist of a one-piece system plastic bag collection pouch, which sometimes involves a flange (mounting plate) and a baseplate (wafer), or a two-piece system composed of a mechanically or adhesive-attached collection pouch. More simply put, an ostomy pouch collects any waste output from stomas. Using an ostomy pouching system helps a stoma to drain into a collection pouch that is sealed, while at the same time protecting all surrounding skin from being contaminated. Ostomy pouches are watertight and airtight, and permit a wearer to live an active life. Read on to learn more about ostomy bags.