PEG Tube: Understanding the Device

A percutaneous endoscopic gastrostomy tube (PEG tube) is a feeding tube placed directly through the abdominal wall into the stomach by a doctor using an endoscope. It is used to provide long-term enteral nutrition to patients who cannot adequately eat by mouth.

Compared with a nasogastric tube, a PEG tube is better suited for long-term use: it does not require replacement every 4–6 weeks (PEG tubes typically last 6–12 months or more), is less visible, and causes no ongoing pressure on the nose or throat. In Hong Kong, PEG tube insertion is routinely performed in the endoscopy suite of public hospitals under sedation — general anaesthesia is not usually required.

Important: This guide provides general information and does not replace individualised guidance from healthcare professionals. After PEG tube insertion, your nurse and doctor will provide specific care instructions — follow their directions in preference to general guidance.

Post-Procedure Care in the First Two Weeks

Stoma Site Care

After PEG tube insertion, the stoma site (abdominal incision) requires careful care until it heals (typically 1–2 weeks):

1. Daily cleaning: Use normal saline or clean water to gently clean the skin around the stoma, removing any discharge or crusting.
2. Keep dry: After cleaning, gently pat dry with a clean gauze pad; keep the surrounding skin dry.
3. External bumper care: Rotate the PEG tube gently each day (360° clockwise and counterclockwise) to prevent adherence between the tube and skin. Then confirm the external bumper sits lightly against the skin — it should not be too tight or too loose, with approximately 1–2 mm of play.
4. Avoid immersion: Keep the stoma site out of water for at least two weeks after surgery.

When Feeding Can Begin

Feeding typically starts 4–6 hours after the procedure, once gut motility is confirmed. The first feed should be supervised by a nurse in hospital; home feeding continues once the patient shows no adverse reactions.

Daily Care Routine

Before Each Feed

1. Wash hands (soap and water for at least 20 seconds).
2. Position the patient upright or with head elevated at least 30–45°.
3. Flush with 30 ml of tepid water to confirm patency.
4. Inspect the stoma site for redness, discharge or unusual odour.

Feeding Methods

PEG tube feeding can be delivered by the following methods; the specific approach is decided by the healthcare team based on the patient’s condition:

• Intermittent bolus feeding: 200–400 ml per feed, 4–6 times daily, mimicking a normal meal pattern. Suitable for most stable home patients.
• Gravity drip: Feed delivered slowly over 1–2 hours per session using a hanging bag. Suitable for patients with poorer digestion.
• Pump feeding: An enteral feeding pump controls the delivery rate. Used for patients needing continuous feeding, such as overnight feeds.

After Each Feed

1. Flush with 30–50 ml of tepid water.
2. Cap or clamp the tube end.
3. Keep the patient upright for at least 30 minutes.
4. Record feed volume and patient status.

Stoma Skin Care

Stoma skin care is central to long-term PEG tube management. Common skin issues and responses:

Normal Healing Signs

• Small amounts of pale yellow or clear discharge in the first days (normal exudate).
• Mild redness around the stoma (normal in the first 1–2 weeks).
• No unusual odour and no significant pain.

Situations Requiring Attention

PEG Tube Fixation and Mobility

Daily Fixation

The PEG tube has an internal bumper (inside the stomach) and an external bumper (on the abdominal wall). The external bumper should:

• Sit lightly against the skin, with 1–2 mm of movement — it must not clamp the skin tightly.
• Be rotated gently daily to prevent adherence, but excessive rotation accelerates bumper wear.

Accidental Dislodgement

Accidental PEG tube dislodgement requires immediate action:

• If the stoma is established (more than 4 weeks post-insertion): The tract has stabilised, but may begin to close within hours. Cover the stoma with clean gauze, and go to A&E or contact your healthcare team immediately.
• Within 4 weeks of insertion: The tract is not yet fully formed. Do not attempt to reinsert the tube yourself — go to A&E immediately.

Medication Management

Giving medications via PEG tube requires care:

1. Prefer liquid formulations: Use liquid oral medications where available to avoid tube blockage.
2. Confirm crushability: Ask your pharmacist whether each medication can be crushed before administering (modified-release, enteric-coated and sublingual tablets must generally not be crushed).
3. Give medications separately: Dissolve each medication separately and flush with 10 ml of water between each one to prevent interactions and blockage.
4. Record administration: Document each medication, time and dose.

Hong Kong Hospital Authority (HA) Follow-Up Arrangements

Post-Discharge Follow-Up

After PEG tube insertion, follow-up typically includes:

• Surgical or gastroenterology outpatient appointment: Usually 4–6 weeks after insertion to assess stoma healing, tube function and nutritional status.
• Community nursing service: Some clusters arrange regular community nurse home visits for stoma care assessment and skill training.
• Speech therapy follow-up: If the patient may eventually transition to oral feeding, an SLP continues to assess swallowing function.
• Dietitian follow-up: Reviews whether the tube feed formula meets caloric and protein needs, adjusting based on weight and condition.

PEG Tube Replacement

PEG tube lifespan varies by brand and material; typically 6–12 months or more. Replacement when the tube ages or is damaged is usually performed in an outpatient clinic or endoscopy suite without general anaesthesia.

Choosing a Home Tube Feed Formula

Hong Kong markets offer a range of commercial tube feed formulas. Key considerations:

• Caloric density: Standard formulas provide 1–1.5 kcal/ml. Patients requiring fluid restriction may need high-density formulas (1.5–2 kcal/ml).
• Protein content: General adult requirements are approximately 1.0–1.5 g/kg per day; elderly patients and those with wounds require more.
• Fibre content: Fibre-containing formulas support bowel regularity but may increase bloating in some patients.
• Disease-specific formulas: Some patients require diabetic formulas (low glycaemic index) or renal formulas (low phosphorus and potassium).

Formula selection should be recommended by a hospital or community dietitian based on individual patient needs — do not change formula independently.

Emergency Situations

Seek immediate medical attention (call 999 or go to A&E) for:

• Accidental PEG tube dislodgement
• Sudden severe abdominal pain or markedly increased distension
• Significant blood-stained discharge or gastrointestinal bleeding
• Persistent vomiting preventing continued feeding
• Fever above 38.5°C combined with signs of stoma infection
• Altered consciousness or breathing difficulty

Long-Term Caregiver Support

Long-term PEG tube management makes significant technical and psychological demands on caregivers. Recommendations:

• Proactively request refresher training from your nurse or community nurse (especially when new caregivers take over).
• Keep a daily log of feeding volumes and stoma care observations to report at follow-up appointments.
• Seek support from your GP or social worker if you experience fatigue or anxiety.