Stoma Bag Filters: Design and Comparison

The full-circle and dual filters (Figure 2) were mounted in identical non-sterile, one-piece, midi-size bags with flat custom-cut (66 mm maximum) baseplates (manufactured by Coloplast A/S, Humlebæk, Denmark). The baseplates had an identical hydrocolloid adhesive skin barrier and were mounted on an opaque stoma bag. At the time of the study, stoma bags with the full-circle filter were not commercially available and were non-CE marked, whilst bags with the dual filter were commercially available and CE-marked. Due to differences in the consistency of colostomy and ileostomy effluent, two variants of the full-circle filter were developed. Closed bags (for colostomies) include a foam pre-filter with a more open structure than the pre-filter in drainable bags (for ileostomies).