Finding the Right Pouching System: Why It Matters

Your ostomy pouching system is the foundation of comfortable, confident daily life with a stoma. A well-fitted, appropriately chosen system prevents leaks, protects your peristomal skin (the skin around the stoma), and gives you the freedom to move through your day without worry.

With dozens of brands and configurations available, the choice can be daunting. This guide walks you through the key decisions so you can make an informed choice — ideally in partnership with your ostomy nurse.

One-Piece vs. Two-Piece Systems

This is often the first and most fundamental choice you'll make.

One-Piece Pouching System

In a one-piece system, the skin barrier (also called a wafer or flange) and the pouch are permanently joined together. You change the entire unit at once.

  • Pros: Low profile, fewer parts, discreet under clothing, easier to apply
  • Cons: More frequent complete changes (skin barrier + pouch together), potentially more skin disturbance over time
  • Best for: Active lifestyles, new ostomates who prefer simplicity, people with limited dexterity

Two-Piece Pouching System

A two-piece system separates the skin barrier from the pouch. The barrier stays on the skin for several days while the pouch can be snapped on and off using a coupling ring or adhesive connection.

  • Pros: Pouch can be swapped without disturbing the skin barrier, more economical over time, easier to inspect the stoma
  • Cons: Slightly bulkier, more parts to manage
  • Best for: People who want to change pouches frequently without skin disruption, those with sensitive peristomal skin

Drainable vs. Closed-End Pouches

Drainable Pouches

Drainable pouches have an opening at the bottom that can be emptied and resealed. They are used for several days before being replaced.

  • Standard choice for ileostomies (high liquid output requiring frequent emptying)
  • Also used for colostomies with looser output

Closed-End Pouches

Closed-end pouches are sealed at the bottom and disposed of when full. They are not emptied — simply removed and discarded.

  • Ideal for colostomies with formed, predictable output
  • Convenient for travel, swimming, or intimacy
  • Some people use closed pouches during the day and drainable at night

Flat vs. Convex Skin Barriers

The skin barrier's shape matters enormously for getting a leak-free seal around your stoma.

  • Flat barriers: Suitable for stomas that protrude well above skin level on a flat abdominal surface
  • Convex barriers: Designed to push inward around a flush, retracted, or recessed stoma, improving the seal. Particularly helpful for people with soft or irregular abdominal contours

Important: Convex products should be selected with guidance from your WOC nurse, as incorrect use of convexity can cause skin injury.

Stoma Opening Size

Most skin barriers come with a pre-cut or cut-to-fit opening. In the first six to eight weeks after surgery, your stoma will shrink as post-surgical swelling resolves. Measure your stoma regularly during this period and adjust your barrier cut size accordingly. Most pouching systems include a measurement guide.

Additional Features to Consider

  • Filters: Many pouches include a charcoal filter to release gas and reduce odour without opening the pouch
  • Opaque vs. clear pouches: Clear pouches allow you to monitor output and stoma health; opaque pouches are more discreet
  • Barrier rings and paste: Accessories that help fill creases and improve the seal around irregular skin surfaces
  • Extended wear barriers: Designed to stay in place for longer periods, useful for active lifestyles or people prone to sweating

Sample Before You Commit

Most ostomy manufacturers offer free sample programs. Before buying in bulk, request samples of any system you're considering. Your WOC nurse or stoma care specialist can also recommend brands based on your stoma type, body shape, and activity level.

There is no single "best" pouching system — the right one is the one that works for your body and your life.