What is the recommended protocol for Rigiflex balloon dilatation as first‑line treatment in an adult with primary achalasia who has no contraindications such as a markedly dilated (>10 cm) or sigmoid esophagus, prior esophageal perforation, or severe coagulopathy?

Rigiflex Balloon Dilatation Protocol for Achalasia

Begin with a 30 mm Rigiflex pneumatic balloon for the first dilatation session, followed by a 35 mm balloon 2-28 days later if symptoms persist, with consideration for a third session using a 40 mm balloon if the Eckardt score remains >3. 1

Initial Dilatation Protocol

First Session

• Start with 30 mm diameter balloon to minimize perforation risk 1
• Position balloon at the esophagogastric junction
• Inflate according to manufacturer's instructions for 1-3 minutes
• Use either endoscopic or fluoroscopic guidance based on local expertise 1

Important caveat: The 2018 UK guidelines provide high-grade evidence (GRADE: high) for starting at 30 mm rather than larger sizes, as this significantly reduces complications. Research confirms perforation rates are higher when starting with 35 mm balloons 2.

Second Session

• Perform 2-28 days after first session 1
• Use 35 mm balloon if symptoms persist or Eckardt score remains >3
• Same positioning and inflation technique

Third Session (If Needed)

• Consider if Eckardt score remains >3 after second session
• Use 40 mm balloon cautiously
• Treatment considered failed if Eckardt score >3 after third session 1

Guidance Method

Either endoscopic or fluoroscopic control is acceptable based on your expertise 1. The guidelines note that while fluoroscopy is used in most studies, endoscopic control alone has proven safe. Routine post-procedure esophagograms are not necessary and did not detect clinically unsuspected perforations in studies 1.

Post-Procedure Management

Immediate Aftercare

• Monitor for at least 2 hours in recovery 1
• Ensure patient tolerates water before discharge 1
• Provide written instructions on diet, fluids, and medications
• Give contact information for on-call team 1

Perforation Surveillance

Watch for persistent chest pain, fever, breathlessness, or tachycardia. Transient chest pain is common and not concerning, but persistent pain warrants CT scan with oral contrast 1. Do not routinely image asymptomatic patients.

Reflux Prevention

Prescribe proton pump inhibitor (PPI) therapy after dilatation 1. This is strongly recommended (GRADE: high) because 10-40% of patients develop symptomatic GERD or ulcerative esophagitis post-treatment 1.

Expected Outcomes and Follow-Up

Efficacy Timeline

• 90% effective at 1 year, declining to 86% at 2 years 1
• Up to one-third experience symptom recurrence during 4-6 years 1
• Repeat dilatation achieves remission in 97% at 5 years and 93% at 10 years 1

Long-Term Management

Consider repeat dilatation during follow-up to maintain symptom response 1. The vast majority of patients with recurrence can be successfully re-treated with additional dilatations rather than requiring surgery 1.

Safety Profile

The overall complication rate for Rigiflex dilation is approximately 3% 3. The graded approach starting at 30 mm with slower inflation significantly reduces perforation risk compared to starting with larger balloons 2. Research demonstrates that therapeutic efficacy results from circumferential stretching of the LES, not muscular disruption, supporting the safety of this gradual approach 4.

Common Pitfalls to Avoid

• Don't start with balloons >30 mm - this increases perforation risk without improving outcomes
• Don't skip the graded approach - jumping directly to 40 mm balloons is dangerous
• Don't forget PPI therapy - reflux complications are common and preventable
• Don't perform routine contrast studies - only image if symptoms suggest perforation
• Don't consider treatment failed after one session - most patients require 2-3 sessions for optimal results