Complications of Colostomy
Colostomy complications can be categorized into short-term and long-term problems, with the most common being ostomy leakage, parastomal hernia (occurring in up to 50% within 5 years), peristomal skin problems, and stoma prolapse. 1
Short-Term Complications
Ostomy Leakage
Leakage is one of the most common and dreaded complications, though it occurs less frequently with colostomies than ileostomies due to the more formed stool consistency. 1 Risk factors include:
- Obesity
- Placement within a skin crease
- Loop configuration
- Flush stoma (not protruding adequately)
The consequences extend beyond physical discomfort—repetitive leakage causes significant skin excoriation, pain, pouching difficulties, and considerable financial hardship from frequent appliance changes. 1
Prevention is paramount through preoperative marking by a stomatherapist and meticulous surgical technique. 1
High Ostomy Output
While high output (>1.5 L/day within 3 weeks) rarely occurs with colostomies, when present it requires prompt evaluation for infection (including Clostridioides difficile), ileus, or medication-related effects. 1 The most critical treatment is hydration to prevent renal failure, typically requiring IV fluids and possible hospitalization. 1
Long-Term Complications
Parastomal Hernia
This is extremely common, occurring in up to 50% of patients within 5 years. 1 Risk factors include:
- Obesity
- Smoking
- Steroid use
- Transverse colostomies (which should be avoided when possible)
Incarcerated hernias represent a surgical emergency requiring immediate intervention when the hernia becomes painful, irreducible, and causes bowel obstruction with potential ischemia. 1
For small, reducible hernias, management includes hernia belts from medical equipment suppliers. Elective repair is reserved for significant pouching issues, pain, or recurrent obstruction. The most effective repair is ostomy reversal when feasible; otherwise, mesh repair is often needed, though recurrence exceeds 25% at 2 years. 1
Stoma Prolapse
Research indicates that colostomy prolapse occurs more frequently than ileostomy prolapse. 2 Prolapse is particularly associated with transverse colostomies and elective surgical approaches. 3 Management typically requires surgical reconfection of the colostomy or restoration of intestinal continuity. 3
Peristomal Skin Problems
Most commonly result from appliance leakage but can also include:
- Allergic contact dermatitis from appliance materials (presents as itching/redness matching product shape)
- Fungal infections from prolonged moisture (itchy maculopapular rash with satellite borders)
- Folliculitis
Management involves skin sealants for minor irritation, antifungal powder sealed with sealant for fungal infections (evaluate further if no improvement after 2 weeks), and potential appliance system changes with temporary steroid spray for allergies. 1
Additional Complications Specific to Colostomy
Compared to ileostomy, colostomies have higher rates of:
- Parastomal fistula
- Stenosis
- Hemorrhage
- Enterocutaneous fistula 2
However, colostomies have lower rates of:
- Skin irritation
- Dehydration
- Pneumonia
- Urinary tract infections 2
Critical Prevention Strategies
Proper stoma placement through the rectus muscle minimizes hernia risk. 1 Avoid using the transverse colon when possible due to significantly increased hernia and prolapse risk. 1 The right colon should also be avoided for colostomy creation given its large diameter and liquid effluent leading to leakage-prone stomas. 1
Preoperative marking by an enterostomal therapist is essential to avoid placement in skin creases, within the belt line, or in areas that compromise pouching. 1