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Gastrointestinal Stomas

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Stoma Fundamentals - What's the Hole Story?

  • Stoma: Artificial opening connecting an internal organ to the body surface.
  • Ostomy: Surgical procedure to create a stoma.
  • Common Indications: Cancer (colorectal), IBD (Crohn's, UC), trauma, obstruction, fecal diversion.
  • Types & Classification:
    • Common: Ileostomy, Colostomy. Others: Gastrostomy, Jejunostomy.
    • Configuration: End, Loop, Double-barrel.
    • Duration: Temporary, Permanent.

Colostomy types and bag placement

FeatureIleostomyColostomy
LocationUsually RIFUsually LIF, Transverse colon
EffluentLiquid, continuous, enzyme-richSemi-solid to formed, intermittent
ProtrusionSpouted (2-3 cm)Flush or <1 cm
ComplicationsHigh output, dehydration, skin excoriationObstruction, prolapse, parastomal hernia

Stoma Creation - Site & Snip

  • Pre-operative Siting (📌 VISIBLE Mnemonic):
    • Visible: To patient for self-care.
    • Incision-away: From surgical incision, scars.
    • Rectus-traversing: Through rectus abdominis muscle.
    • Skin-crease free: Away from folds, umbilicus.
    • Bony-prominence free: Avoid iliac crest.
    • Level surface: For good appliance seal.
    • Easy access: For stoma care.
    • Site on apex of infra-umbilical fat fold. Optimal stoma siting and cross-section
  • Surgical Steps:
    • Trephine: Skin disc excised (match bowel diameter, often 2-3 cm); abdominal wall layers incised.
    • Bowel mobilization: Tension-free exteriorization.
    • Maturation:
      • End (e.g., Brooke ileostomy): Everted, sutured to skin.
      • Loop: Opened, edges sutured to skin; rod optional.

⭐ Passing the stoma through the rectus abdominis muscle significantly reduces parastomal hernia risk.

Stoma Complications - When Holes Go Haywire

📌 Mnemonic for early complications: 'RASH IN M.E.' (Retraction, Abscess, Sepsis, Hemorrhage, Ischemia, Necrosis, Mucocutaneous separation, Edema).

TypeComplications & Key Features/Management Hints
EarlyIschemia/Necrosis (dusky/black; urgent revision if deep), Retraction (may need revision), Mucocutaneous separation (local care/revision), Hemorrhage (local pressure; explore if severe), Infection (antibiotics, drainage). High output state (>1.5-2L/day; fluids, loperamide), Edema (usually self-limiting).
LateStenosis (dilation/revision), Prolapse (manual reduction/revision), Parastomal hernia (most common; support belt/repair), Dermatitis (skin barrier, topical agents), Fistula (conservative/surgical), Obstruction (investigate cause). Gallstones (↑ risk post-ileostomy), Psychological issues.

⭐ Parastomal hernia is the most common late complication of stomas.

Living with a Stoma - Pouch & Practicalities

  • Stoma Appliances:

    • Types: One-piece or two-piece systems.
    • Bags: Drainable (ileostomy/high-output) vs. closed (colostomy).
    • Convexity inserts for flush/retracted stomas. Types of Ostomy Pouches
  • Skin Care:

    • Barrier creams/powders protect peristomal skin.
    • Proper pouch fit prevents leakage.
  • Dietary Considerations:

    FeatureIleostomyColostomy
    Initial DietLow-residueFewer restrictions
    Hydration/SaltCrucial; output 500-800 ml/day (adapted)Important
    Blockage RiskHigher; Avoid 📌 COPS (Corn, Coconut, Orange pith, Popcorn, Peas, Pineapple, Skins, Seeds, Stringy veg)Lower
    Gas/OdorManageableManage gas/odor
  • Monitoring & Support:

    • Check electrolytes, Vit B12 (terminal ileostomy).
    • Psychosocial support essential.

⭐ Patients with terminal ileostomies often require lifelong Vitamin B12 supplementation.

High‑Yield Points - ⚡ Biggest Takeaways

  • Ileostomy: liquid, enzyme-rich output, continuous; skin protection crucial.
  • Colostomy output: varies by site: ascending (liquid), transverse (semi-formed), sigmoid (formed).
  • Loop stomas: usually temporary, two openings. End stomas can be permanent.
  • Complications: prolapse, retraction, stenosis, parastomal hernia, dermatitis.
  • High-output stomas (>1.5L/day): risk dehydration, electrolyte imbalance (K+, Mg++ loss).
  • Brooke ileostomy: everted mucosa forms spout, minimizing skin contact.
  • Hartmann's procedure: results in end colostomy and rectal stump.

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