As the provider, how should I manage a percutaneous endoscopic gastrostomy (PEG) site that is red beneath the bumper with yellow‑green drainage?

Management of Infected PEG Site with Purulent Drainage

You should immediately loosen the external bumper to ensure at least 5mm of free tube movement, obtain a wound culture, initiate daily sterile dressing changes with antiseptic measures, and start systemic antibiotics if the infection is persistent or spreading beyond the immediate peristomal area. 1

Immediate Assessment and Action

The yellow-green drainage with erythema beneath the bumper indicates a peristomal infection, which occurs in approximately 15% of PEG placements and is the most common complication 1. Your first priority is to assess whether this represents simple localized infection versus more serious complications like cellulitis or necrotizing fasciitis 2.

Critical First Step: Check Bumper Tension

The external fixation plate must allow at least 5mm of free tube movement 1. Excessive tension is a primary cause of peristomal infection by creating:

• Local ischemia at the stoma site
• Pressure necrosis
• Moisture accumulation under the bumper
• Impaired wound healing

Push the tube 2-3 cm inward, then pull back gently until you feel resistance from the internal bumper. The external bumper should then be repositioned to maintain this 5mm play 1.

Wound Management Protocol

Daily Sterile Dressing Changes

1. Remove old dressing and loosen the external bumper
2. Dispose of gloves, perform hand hygiene, apply new sterile gloves 1
3. Obtain a swab for culture before cleaning 1
4. Inspect the wound carefully for:
   • Extent of erythema (>5mm suggests true infection vs. mechanical irritation) 1
   • Purulent drainage character and volume
   • Induration or subcutaneous gas (concerning for necrotizing fasciitis) 2
   • Bleeding or hypergranulation tissue
5. Clean the site thoroughly with antiseptic solution 1
6. Dry completely - moisture promotes bacterial growth 1
7. Apply Y-compress under the tube to prevent moisture accumulation and cushion movement 1
8. Secure external bumper with proper 5mm clearance 1
9. Apply sterile dressing 1

Avoid Common Pitfalls

• Never use overlying gauze with tape or abdominal pads - these retain moisture and damage surrounding skin 2
• Do not allow the bumper to compress the skin - this creates the exact conditions that caused the infection 1
• Redness less than 5mm around the stoma is often mechanical irritation from tube movement, not infection 1

Antibiotic Therapy

Most peristomal infections resolve with antiseptic measures and proper dressing technique alone 1. However, you should initiate systemic antibiotics if:

• The infection persists despite 2-3 days of proper local care 1
• Erythema extends significantly beyond the immediate peristomal area
• Systemic signs are present (fever, leukocytosis)
• The patient is immunosuppressed

Base antibiotic selection on culture results when available 1.

Red Flags Requiring Urgent Intervention

Watch for signs of serious complications that may require surgical consultation:

• Cellulitis progressing to necrotizing fasciitis - look for subcutaneous gas on imaging, severe pain out of proportion to exam, systemic toxicity 2
• Peritonitis - diffuse abdominal pain, rigidity, fever
• Buried bumper syndrome - tube cannot be mobilized, poor flow through tube 1, 3

Follow-Up Care

Continue daily sterile dressing changes until the stoma tract has fully granulated (typically 7-10 days), then transition to dressing changes every 2-3 days 1. The tube should be mobilized daily during this period to prevent adhesions and buried bumper syndrome 1.

If gastric contents are leaking around the site, protect the surrounding skin with a hydrocolloid wafer as a keyhole dressing 1.