Flange Extenders and Barrier Strips

Flange extenders and barrier strips are thin adhesive accessories placed around an ostomy baseplate to enlarge the sticking area, frame skin folds, and help stop the pouch peeling at the edges. They support security and skin protection but do not replace a correctly sized appliance. Suitability depends on output, skin condition and activity; a stoma care nurse or clinician should advise on individual use.

What they are

An ostomy appliance sticks to the skin around the stoma through a hydrocolloid or similar skin barrier, often called a flange or baseplate. The quality of that seal matters: if effluent reaches the skin, irritation and leaks can follow. Flange extenders and barrier strips are extra adhesive pieces used with the main appliance. They are not a pouch, and they do not change the size of the hole cut for the stoma.

Most are made from similar materials to the skin barrier itself, typically a thin hydrocolloid layer with a backing film. They come as short strips, longer tapes, or curved pieces that sit on the outer rim of the flange. In everyday practice the two product groups overlap, and some people use them together.

They are widely used after colostomy, ileostomy and urostomy surgery, including in people living with inflammatory bowel disease. They are accessories, not a treatment for an ill-fitting stoma or an untreated peristomal complication.

How flange extenders and barrier strips differ

The names are not strictly standardised, and clinic language varies. The practical distinction is where the accessory sits and what problem it is meant to address.

Flange extenders

Flange extenders are usually placed on top of the outer edge of an already applied baseplate, overlapping both the flange and the surrounding skin. Their main job is to increase the adhesive footprint so that the corners and rim are less likely to lift with movement, moisture or clothing.

They are often curved or horseshoe-shaped so they follow a round or oval flange. Rectangular pieces can be arranged around the rim in the same way. People commonly consider them when the appliance is otherwise well centred but the outer edge peels, or when extra hold is wanted for work, exercise or a known period of heavier sweating.

Barrier strips

Barrier strips are typically narrower. They may be laid on the skin before the pouch is applied, to frame the stoma, bridge a crease, or create a smoother landing zone for the flange. Some people also use them beside or under the inner edge of the barrier when a dip, scar or fold threatens the seal.

They can act as a protective layer on intact skin and as a filler for shallow contours. They do not replace a barrier ring or paste when a deeper gap needs filling, and they should not be packed into broken skin without clinical advice.

When they may help

Mainstream stoma care treats these accessories as optional supports, not as routine for every person with a stoma. Evidence on specific accessory products is limited compared with research on core appliances; much of the guidance comes from specialist nursing practice and consensus rather than large trials. When evidence is mixed or product-specific, individual assessment remains the safer path.

Situations in which a stoma care nurse may discuss them include:

• repeated lift at the flange edge despite a well-cut opening
• abdominal contours, skin folds, pregnancy-related change, or weight change that leave a small unsupported rim
• high-output ileostomy or urostomy, where even a short leak is poorly tolerated by the skin
• extra security for swimming, contact sport, heavy lifting or long working days
• a need to frame a baseplate on a very mobile abdomen

They are a poor substitute for other problems. A hole that is too large, a stoma that has retracted, an untreated hernia, or active peristomal moisture-associated skin damage needs a different plan, often a change of barrier shape or convexity, or medical treatment, rather than more adhesive at the edge.

Using them safely

There is no single sequence that suits every abdomen. The principles below are general; a stoma care nurse should demonstrate technique for your own appliance.

Skin is usually cleaned as for a normal pouch change and left fully dry. Adhesive accessories stick poorly to lotion, oil or dampness. Many people warm the piece briefly in their hands so that it conforms, then apply it without stretching the skin into an unnatural position. Extenders generally overlap the flange rim rather than covering the stoma or the pouch filter.

Adding layer upon layer is rarely helpful. Thick stacks can create new ridges, trap moisture and make removal more traumatic. If several accessories are needed to keep a pouch on, the underlying fit is usually the issue.

Removal should protect the skin. Supporting the skin with one hand and peeling slowly, parallel to the surface, reduces stripping. Residue can often be managed with the same gentle approach used for the main barrier. Pain, bleeding or new raw patches after removal are reasons to stop and seek advice rather than to add stronger adhesive.

Do not use household tapes, dressings intended for other wounds, or adhesive products that have not been discussed with your stoma care team. Skin around a stoma is repeatedly exposed to effluent and to frequent removal; unsuitable adhesives increase the risk of irritation and allergy.

Skin reactions and other cautions

Peristomal skin problems are common. Extra adhesive increases both the area of contact and the mechanical load when the pouch comes off. Contact allergy to hydrocolloid components, tackifiers or tapes can appear even after uneventful use. Redness confined to the shape of a strip, itching or blistering should be reported.

People with very fragile skin, current ulceration, pyoderma gangrenosum, or marked mucocutaneous separation need individualised plans. More adhesive is not automatically safer. Children, older adults, and anyone on medicines that thin the skin also warrant extra caution.

Barrier strips and extenders do not treat infection, alter urine chemistry, or replace medical care for a blocked stoma, severe rash or unexplained bleeding. If output pattern, stoma colour or pain changes, contact clinical services rather than adjusting accessories alone.

Anyone unsure whether a product is appropriate, especially after recent surgery, chemotherapy, radiotherapy to the abdomen, or a change in hernia support, should ask their stoma care nurse or clinician before using it.

Practical limits

Wear time of the whole appliance still depends on output, climate and the main barrier. Extenders may delay edge lift; they do not guarantee a longer wear time and should not be used to ignore a leaking inner seal.

They can usually be trimmed with clean scissors to follow an unusual contour, but cutting should not create sharp points that catch on clothing, and the piece should not encroach on the stoma. Compatibility with convex baseplates, soft convexity or two-piece systems varies; the nurse who fitted the system is best placed to say whether an extender will sit flat.

In the United Kingdom, many ostomy accessories are supplied through stoma care services. Product choice is a clinical decision. The most suitable accessory is the one that protects your skin without unnecessary layers.

The bottom line

Flange extenders and barrier strips are simple adhesive supports that can widen a flange’s hold or frame awkward skin. They work best as a targeted extra, on intact dry skin, after the appliance itself has been properly fitted. They are not a cure for leaks from a poorly sized opening or for untreated skin disease. If edges lift, the skin is sore, or you are stacking products to get through the day, speak to your stoma care nurse or clinician rather than improvising.