Understanding Ostomy Surgery
An ostomy is a surgical procedure that creates an opening (stoma) on the abdomen to divert waste from the digestive or urinary system. The three main types are colostomy (colon), ileostomy (small intestine), and urostomy (urinary diversion). Each type has different output characteristics that influence product selection.
One-Piece vs Two-Piece Systems
One-Piece Systems
In a one-piece system, the pouch (bag) and skin barrier (baseplate/waffer) are permanently attached. They are lighter, more flexible, and easier to conceal under clothing. However, the entire unit must be changed with each pouch replacement, which can be more irritating to peristomal skin over time.
Best for: People with flat peristomal skin, those who prefer simplicity, and those with good hand dexterity.
Two-Piece Systems
In a two-piece system, the skin barrier (baseplate) and pouch are separate components that connect via a flange coupling. The baseplate can remain in place for 2-4 days while pouches are changed as needed. This reduces skin irritation from frequent barrier changes.
Best for: People with sensitive peristomal skin, those who need to change pouches frequently (high output ileostomies), and those who prefer to inspect the stoma without removing the barrier.
Baseplate (Skin Barrier) Selection
The skin barrier is the most critical component of an ostomy system. It protects the peristomal skin from contact with effluent, which is particularly important for ileostomies and urostomies where output is corrosive.
Factors in baseplate selection:
- Stoma size and shape - measure the stoma at its widest point; the opening should be 1-2mm larger than the stoma
- Peristomal skin contour - flat, convex, or deep convex for retracted or flush stomas
- Output type - liquid output (ileostomy/urostomy) requires a more secure seal
- Skin sensitivity - standard, extended wear, or sensitive skin formulations
Peristomal Skin Care
Healthy peristomal skin is intact, clean, and free from redness or breakdown. Common problems include irritant contact dermatitis (from effluent leakage), fungal infections, and mechanical injury from frequent barrier removal.
Essential peristomal skin care products:
- Barrier films/wipes - create a protective layer on the skin before applying the baseplate
- Stoma powder - absorbs moisture from denuded skin and helps the barrier adhere
- Barrier rings/pastes - fill uneven areas and prevent leakage under the barrier
- Adhesive removers - gently remove the baseplate without skin trauma
- Stomahesive powder - for moist, denuded peristomal skin
Essential Ostomy Accessories
- Stoma caps/mini pouches - for short-term use during showering, intimacy, or irrigation
- Ostomy belts - provide additional security for active individuals or hernia support
- Deodorants - pouch deodorants and lubricating deodorants to manage odour
- Irrigation supplies - for colostomy irrigation (sigmoid/descending colon)
- Stoma measuring guides - to accurately size the stoma for barrier cutting
Leading Ostomy Brands at EMIS+
EMIS+ carries the full range from the world's leading ostomy manufacturers:
- ConvaTec - Sur-Fit Natura, Esteem, ActiveLife systems View ConvaTec ostomy products
- Coloplast - Sensura, Assura, SenSura Mio systems View Coloplast ostomy products
- Hollister - Premier, CeraPlus, New Image systems
Frequently Asked Questions
How long does an ostomy bag last?
One-piece pouches are typically changed every 1-3 days depending on output. Two-piece pouches can be changed daily or as needed, while the baseplate remains for 2-4 days. Ileostomies with high output may need more frequent changes than colostomies.
Can I shower with an ostomy bag?
Yes. You can shower with the pouch in place (most systems are water-resistant) or remove it for showering. If removing, cover the stoma with a tissue or stoma cap. Avoid applying oils, lotions, or powders to the peristomal skin before applying a new barrier.
Where can I buy ostomy supplies in Singapore?
EMIS+ is Singapore's specialist ostomy supply store, carrying ConvaTec, Coloplast, and Hollister products. We offer islandwide delivery and WOCN nurse home visits for stoma assessment, fitting, and care education. WhatsApp us at +65 8139 8668 for product advice.
What is the difference between a colostomy and ileostomy bag?
Colostomy output is generally more formed and less corrosive, so standard barriers and drainable or closed pouches work well. Ileostomy output is liquid and enzyme-rich, requiring extended-wear barriers and drainable pouches. Urostomy pouches have a tap at the bottom for urine drainage and may include anti-reflux valves.
How do I prevent ostomy bag leakage?
Leakage prevention starts with correct stoma measurement and barrier sizing (1-2mm larger than the stoma). Use barrier rings or paste to fill uneven skin contours. Ensure the peristomal skin is clean and dry before application. Consider a convex barrier if the stoma is flush or retracted. Change the barrier before it shows signs of breakdown (usually every 2-4 days).
Clinical review: This content was medically reviewed by Jamie N Y.M, WOC Nurse (Wound, Ostomy and Continence). Last updated: October 2026. For individual clinical concerns, consult a healthcare professional.