In which clinical situations is gastrostomy tube insertion indicated?

Gastrostomy Tube Insertion: Clinical Indications

Gastrostomy tube insertion is indicated for patients requiring enteral nutrition for more than 4-6 weeks who are at high risk of malnutrition and unlikely to recover oral feeding ability in the short term. 1, 2

Primary Indications

Gastrostomy placement serves three main purposes: nutrition delivery, gastric decompression, and medication administration in patients unable to maintain adequate oral intake. 3

Neurological Disorders of Swallowing

• Stroke (CVA), multiple sclerosis, motor neurone disease, Parkinson's disease, and cerebral palsy are the most common neurological indications. 1, 2
• For acute dysphagic stroke, some evidence suggests placement at 14 days post-stroke, though most authorities recommend waiting 4-6 weeks to allow for potential recovery. 1

Cognitive Impairment and Depressed Consciousness

• Head injury with prolonged altered mental status requiring nutritional support. 1, 2

Mechanical Obstruction to Swallowing

• Oropharyngeal or oesophageal cancer causing dysphagia. 1, 2
• Radiation enteropathy affecting swallowing function. 1, 2

Long-Term Partial Intestinal Failure

• Short bowel syndrome, fistulae, and cystic fibrosis requiring supplementary enteral intake. 1, 2

Critical Patient Selection Criteria

Patient selection is paramount because despite low immediate procedural morbidity, overall mortality within weeks of PEG placement is very high (23.5% die during the hospitalization in which the tube is placed), primarily due to poor patient selection rather than the procedure itself. 1, 4

Essential Requirements Before Placement

• High risk of malnutrition with feeding problems expected to persist beyond 4-6 weeks. 1, 2
• Adequate gastrointestinal function to absorb and tolerate enteral feeding. 1
• Patient and family acceptance of the concept of gastrostomy feeding. 1
• Confirmation by an experienced gastroenterologist or trained nutrition support team member. 1
• Specialist assessment of swallowing prognosis. 1

Relative Contraindications

Do not place gastrostomy in patients with: 1, 2

• Gastro-oesophageal reflux (consider gastrojejunostomy instead)
• Previous gastric surgery
• Ascites
• Extensive gastric ulceration
• Neoplastic/infiltrative disease of the stomach
• Gastric outlet obstruction
• Small bowel motility problems
• Malabsorption
• Peritoneal dialysis
• Hepatomegaly
• Gastric varices
• Coagulopathy
• Late pregnancy

Crohn's disease is no longer considered an absolute contraindication and should be used when necessary, despite earlier concerns about disease occurrence within the gastrostomy tract. 1

Advantages Over Nasogastric Tubes

When enteral feeding is required for more than 4-6 weeks, PEG is superior to nasogastric tubes because it provides: 5, 6

• Feeding without the inconvenience, discomfort, and embarrassment of NG access
• Lower rates of ventilator-associated pneumonia in mechanically ventilated patients
• Reduced risk of dislodgement (NG tubes have 40-80% dislodgement rates without proper securement)
• Better patient comfort and social acceptance

Common Pitfall to Avoid

The most critical error is placing gastrostomy tubes in patients with severe underlying terminal illness without careful consideration of prognosis and quality of life. Studies show median survival of only 7.5 months post-PEG placement, with half of patients in the terminal phase of their illness. 4 The decision must prioritize patient clinical benefit and should never be performed for administrative convenience or as a substitute for good nursing care. 2