Study guide
6.4 Applying and Changing a Pouching System: Procedure & Troubleshooting
Certified Ostomy Care Nurse COCN
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1 Chapter 1: Introduction & COCN Exam Strategy
1.1 WOCNCB COCN Certification, Eligibility & Test Blueprint 1.2 Study Methodology, Pacing & Exam Day Strategy 1.3 Ethical, Legal & Professional Practice Standards in Ostomy Care
2 Chapter 2: Preoperative Assessment & Stoma Site Marking
2.1 Comprehensive Patient Assessment & Medical History 2.2 Preoperative Stoma Site Marking Principles & Techniques 2.3 Psychosocial, Cultural & Quality of Life Assessment 2.4 Pain Assessment & Interpretation Using Verbal and Nonverbal Tools
3 Chapter 3: Surgical Diversions & Anatomy/Physiology
3.1 Colostomy Diversions: Anatomy, Surgical Techniques & Effluent Characteristics 3.2 Fecal Diversions: Ileostomy, Loop/End & Continent GI Diversions 3.3 Urinary Diversions: Ileal Conduit, Continent Cutaneous Reservoirs & Neobladders 3.4 Surgical Complications of Diversion Surgery: Ileus, Leak, Dehiscence & Infection 3.5 Loop Stoma Support Devices: Rods, Bridges, Pouching & Removal
4 Chapter 4: Postoperative Assessment & Stomal Complications
4.1 Acute Postoperative Stoma Assessment & Viability Monitoring 4.2 Stomal Complications: Necrosis, Retraction, Prolapse & Stenosis 4.3 Parastomal Hernias, Mucocutaneous Separation & Lacerations
5 Chapter 5: Peristomal Skin Complications & Differential Diagnosis
5.1 Assessment Frameworks & Peristomal Skin Scoring (DET Score) 5.2 Moisture-Associated Skin Damage & Chemical Irritant Dermatitis 5.3 Mechanical Injury, Medical Adhesive-Related Skin Injury (MARSI) & Folliculitis 5.4 Infectious, Allergic & Inflammatory Peristomal Pathologies (Candidiasis, Pyoderma Gangrenosum) 5.5 Pseudoverrucous Lesions, Hyperkeratosis & Peristomal Tissue Overgrowth
6 Chapter 6: Ostomy Containment Systems & Accessory Selection
6.1 Pouching Systems: One-Piece, Two-Piece, Flat, and Convex Barriers 6.2 Ostomy Accessories, Skin Barriers, Pastes, Powders & Seals 6.3 Special Populations & Challenging Stomas: Pediatric, Geriatric & Bariatric Solutions 6.4 Applying and Changing a Pouching System: Procedure & Troubleshooting
7 Chapter 7: Routine Management of Fecal & Urinary Diversions
7.1 Urostomy Management: Mucus, Stents, Night Drainage & Specimen Collection 7.2 Colostomy Management: Pouch Options, Odour Control & Bowel-Regulating Medications 7.3 Continent Diversion Management: Catheterization, Irrigation & Troubleshooting
8 Chapter 8: Specialized Clinical Interventions & Procedures
8.1 High-Output Stoma Management, Fluid Balance & Nutritional Strategies 8.2 Colostomy Irrigation: Indications, Contraindications, Equipment & Technique 8.3 Complex Fistula Management: Sepsis Control, Nutrition & Pharmacotherapy
9 Chapter 9: Fistula Assessment & Perifistular Management
9.1 Fistula Types & Anatomic Classification 9.2 Fistula Characteristics: Output, Simple vs Complex, Pseudostoma & Chronicity 9.3 Perifistular Skin Care & Selecting a Containment Option
10 Chapter 10: Percutaneous Tubes & Drains
10.1 Types of Percutaneous Tubes and Drains 10.2 Percutaneous Tube Management Plan: Stabilization, Patency & Skin Care 10.3 Percutaneous Tube Complications: Dislodgement, Blockage, Leakage & Hypertrophic Tissue 10.4 Managing Peritubular Skin: Crusting, Cauterization & Stabilization 10.5 Containment Options for Tubes and Drains: Pouching vs Absorptive Dressings
11 Chapter 11: Care Planning & Plan Evaluation
11.1 Developing a Patient-Centered Plan of Care 11.2 Special Considerations in Planning: Disability, Body Image & Intimacy 11.3 Additional Populations: Neonatal, Pediatric, Obstetric & Bariatric Planning 11.4 Evaluating the Effectiveness of the Plan of Care 11.5 Interpreting Patient Responses & Modifying Interventions
12 Chapter 12: Patient Rehabilitation, Education & Long-Term Care
12.1 Postoperative Patient & Caregiver Education, Self-Care Mastery 12.2 Diet, Fluid Management, Medication Adjustments & Food Blockage Protocols 12.3 Psychosocial Adaptation, Intimacy, Physical Activity & Long-Term Resources
13 Chapter 13: Education, Referral & Interprofessional Collaboration
13.1 Preoperative Education: Procedures, Expectations & Stoma Site Marking 13.2 Teaching Emergent Complications: What Must Prompt a Call 13.3 Educating Other Health Care Professionals 13.4 Available Resources & Referrals for Other Services 13.5 Facilitating Consultations & Handoff Communication Across Care Settings
6.4 Applying and Changing a Pouching System: Procedure & Troubleshooting
Key Takeaways Explain This Topic AI
Change the pouching system on a planned schedule of every 3 to 7 days rather than waiting for a leak, and always change immediately if the patient reports burning, itching, or leakage under the wafer.
Re-measure the stoma at every change for the first 6 to 8 weeks while postoperative edema resolves, then whenever weight, contour, or wear time changes.
Cleanse with warm water alone or a residue-free soap — soaps containing oils, lanolin, moisturizers, or fragrance leave a film that destroys adhesion, and alcohol-based products dehydrate the skin.
Apply the barrier to completely dry skin and hold it with a warm hand for 30 to 60 seconds, because body heat is what activates and moulds the hydrocolloid to the peristomal contour.
The underside of the removed wafer is a diagnostic record: uniform white swelling is normal absorption, while erosion concentrated at one clock position identifies exactly where the seal is failing and why.
Last updated: September 2026
Applying and Changing a Pouching System: Procedure & Troubleshooting
Quick Summary: Every other topic in ostomy nursing eventually resolves into this procedure. Exam items rarely ask you to list the steps in order; they ask which step was skipped, given a described failure. Learn the procedure by its rationale , so you can reason backward from a leak to its cause.
Before You Start: Timing and Preparation
When to change. On a planned schedule , every 3 to 7 days , rather than reactively when it leaks. Waiting for failure guarantees at least one episode of skin exposure per cycle. Change immediately , off schedule, if the patient reports burning, itching, or leakage beneath the wafer — those are the three symptoms that mean effluent is already on skin.
What time of day. When output is lowest: first thing in the morning before eating , or 2 to 4 hours after a meal . Ileostomy output surges 20 to 60 minutes after eating, so mid-meal is the worst possible window.
Where. Standing in front of a mirror, or lying flat if the abdomen has creases that only disappear supine. The position that gives the best seal is the position in which the peristomal plane is flattest and the stoma is most visible.
Supplies, gathered before removal: new barrier and pouch, measuring guide, pen or marker, scissors curved for cutting, warm water and soft cloths or gauze, disposal bag, and any accessories that will be needed. Once the old system is off, an ileostomy will not wait for you.
- Step-by-Step Procedure
- 1. Remove atraumatically
Use the push-pull technique : with one hand, push the skin gently away from the adhesive; with the other, peel the wafer back on itself parallel to the body wall at a low angle , working from top to bottom. Use a silicone-based adhesive remover if adhesion is strong or the skin is fragile. Peeling upward at a steep angle is the single commonest cause of medical adhesive-related skin injury.
2. Read the wafer
Turn the removed wafer over before discarding it. This is a free diagnostic.
Underside appearance Interpretation Action
Uniform, shallow white swelling around the opening Normal moisture absorption at appropriate wear time Continue current interval
Complete melt-out of the barrier ring Wear time too long, or output too caustic Shorten interval; consider extended-wear barrier
Erosion at one clock position only Directional leak — a crease, dip, or downward-aiming lumen at that point Level with a ring or paste; consider convexity
Adhesive still fully intact, no swelling Wear time could safely be extended Lengthen interval
Barrier lifted at the outer edge Body flexion, clothing friction, or belt line Barrier extenders or a different barrier profile
3. Cleanse and dry
Warm water alone is sufficient and is preferred. If soap is used, it must be residue-free — no oils, lanolin, moisturizers, fragrance, or antibacterial additives, all of which leave a film that adhesive cannot bond through. Avoid alcohol , which dehydrates and stings on denuded skin, and avoid baby wipes , which almost universally contain emollients. Pat completely dry; the barrier will not adhere to damp skin.
If hair interferes with adhesion, clip with electric clippers or scissors in the direction of hair growth . Never dry-shave — that is a direct cause of peristomal folliculitis.
4. Assess
Inspect the stoma for colour, protrusion, edema, and lumen orientation; inspect the mucocutaneous junction for separation; inspect the peristomal skin and assign a DET score if abnormal. This is the moment the clinical assessment actually happens.
5. Measure
Use the measuring guide to find the aperture that matches the stoma base — not the widest point of the stoma, the base . Measure at every change for the first 6 to 8 weeks while edema resolves, and again after significant weight change or a change in wear time. Aperture target: within 1/16 to 1/8 inch (1.5 to 3 mm) of the base.
6. Prepare the barrier
Trace and cut, or mould a mouldable barrier by rolling the edge back with the fingers. Cut smoothly — a jagged edge concentrates stress and can lacerate the stoma. For an oval stoma, cut an oval. Remove the release paper.
7. Apply accessories in the correct order
Order matters and is testable:
Stoma powder first , but only onto moist, denuded skin , then dust off all loose excess.
Seal with a non-alcohol barrier film , and repeat powder-and-seal 2 to 3 times — the crusting technique .
Barrier ring or paste applied to level dips and creases, or applied to the wafer itself around the aperture.
Barrier film on intact skin if additional protection is wanted before the wafer.
8. Apply the barrier
Centre the aperture over the stoma, working from the bottom edge upward so you can see what you are doing, and smooth outward from the stoma to eliminate wrinkles. Then hold with a warm flat hand for 30 to 60 seconds . Body heat softens the hydrocolloid so it flows into the skin's contours; this is not optional comfort, it is the adhesion mechanism.
9. Finish
For a two-piece system, support the abdominal wall with one hand while snapping the flange with the other so the click does not transmit force into the abdomen. Confirm the pouch is fully seated all the way around. Close the outlet — clamp, integrated closure, or urostomy tap — and verify closure by feel. Attach the belt if used, at two-finger tension , in the horizontal plane at 3 and 9 o'clock .
10. Teach and document
Empty at one-third to one-half full , never when nearly full, because the weight breaks the seal. Document stoma appearance and measurement, peristomal skin and DET score, products used, aperture size, wear time achieved, and the patient's level of participation.
Special Situations
High output during the change: have the patient sit or stand, work quickly, and wick continuously. A rolled gauze or a tampon placed loosely at the stoma opening absorbs while you prepare the barrier — never insert anything into the stoma.
Urostomy: urine is continuous. Wick with a gauze roll or absorbent wick against the stoma throughout the change, replacing it as it saturates.
Denuded skin: crust before pouching; do not pouch over wet skin.
Very deep creases: apply while the patient is in the position that flattens the crease, then have them move before you finish holding, so the barrier moulds to a realistic contour.
Warning: The two most common technical errors produce opposite injuries. Cutting the aperture too large exposes a ring of skin to effluent and causes irritant dermatitis and, over time, pseudoverrucous lesions. Cutting it too small lacerates the stoma — painless, brightly bleeding, and easily missed. Both are avoided by measuring the base at every change while edema resolves.
Exam Tip: If an item describes a wafer that leaked at the 6 o'clock position after two days, the answer is not "change more often." It is to find and level the dip, crease, or downward-aiming lumen at 6 o'clock with a barrier ring, strip paste, or appropriate convexity. Directional failure has a directional cause.