Abstract

Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by the gradual loss of motor neurons. As the disease advances, many patients develop dysphagia, malnutrition, and respiratory impairment, all of which are associated with poor clinical outcomes. Percutaneous Endoscopic Gastrostomy (PEG) is widely recognized as the preferred long-term enteral feeding method for patients who are unable to maintain adequate oral nutrition. Clinical evidence has shown that PEG can improve nutritional status, reduce the risk of aspiration, and contribute to prolonged survival in patients with ALS, making it an essential component of multidisciplinary supportive care.

Why is PEG Recommended for ALS Patients?

Dysphagia affects the majority of patients with ALS during disease progression, leading to weight loss, malnutrition, dehydration, and an increased risk of aspiration pneumonia. Numerous studies have identified nutritional status and body weight as independent predictors of survival in ALS.

Compared with nasogastric tube feeding, PEG is recommended for patients who are expected to require enteral nutrition for more than four to six weeks. Key clinical benefits include:

• Providing reliable long-term enteral nutrition
• Preserving gastrointestinal function
• Reducing the risk of aspiration and aspiration pneumonia
• Supporting improved nutritional status and overall prognosis

Optimal Timing for PEG Placement

The timing of PEG placement plays a critical role in clinical outcomes. Although current international guidelines do not define an exact timing, most experts recommend considering PEG before severe malnutrition or advanced respiratory failure develops.

Clinical decision-making is typically based on the following factors:

• Progressive dysphagia
• Approximately 5–10% unintentional body weight loss
• Preserved respiratory function, particularly a Forced Vital Capacity (FVC) above 50%

Research indicates that earlier PEG placement, before significant weight loss and respiratory decline, is associated with better nutritional recovery and improved survival.

Clinical Benefits of PEG

A growing body of evidence supports the effectiveness of PEG in the management of ALS. Clinical studies have demonstrated that PEG can:

• Improve nutritional status and stabilize body weight
• Reduce the incidence of aspiration pneumonia
• Extend patient survival, with some studies reporting an average survival benefit of approximately six months
• Provide consistent nutritional support throughout disease progression

It is important to note that PEG does not alter the underlying neurodegenerative process of ALS. Instead, it improves clinical outcomes by preventing malnutrition and reducing nutrition-related complications.

Safety and Clinical Considerations

PEG is considered a safe and well-established minimally invasive procedure. Most procedure-related complications are mild and manageable, including:

• Peristomal infection
• Tube dislodgement
• Peristomal leakage
• Localized pain

Serious complications remain relatively uncommon.

For patients with advanced respiratory impairment or poor general condition, individualized preoperative assessment is essential. Recent advances—including ultrathin endoscopy, unsedated PEG techniques, and non-invasive ventilatory support during the procedure—have further improved procedural safety in high-risk ALS patients.

Conclusion

Percutaneous Endoscopic Gastrostomy (PEG) has become an important component of nutritional management for patients with Amyotrophic Lateral Sclerosis. Early and appropriately timed PEG placement helps maintain nutritional status, reduce aspiration-related complications, and improve survival outcomes.

As PEG techniques and perioperative management continue to evolve, PEG is expected to play an increasingly important role in the multidisciplinary care of ALS patients.

About EVT Medical

EVT Medical is committed to developing reliable minimally invasive medical devices for the non-vascular intervention field. Through continuous innovation and product optimization, we provide high-quality clinical solutions for enteral nutrition and interventional procedures, helping healthcare professionals deliver safer and more effective patient care worldwide.