Validation of Padova Classification of Post-Fundoplication Outflow Obstruction on High-Resolution Manometry in an...

Area of Science:

• Gastroenterology
• Surgical Innovation
• Diagnostic Tools

Background:

• Dysphagia is a common complication following laparoscopic Nissen fundoplication (LNF).
• Post-fundoplication outflow obstruction (PFOO) is a potential cause, defined by high-resolution manometry (HRM) using the Padova Classification.
• Distinguishing PFOO from effective fundoplications is crucial for patient management.

Purpose of the Study:

• To compare clinical and HRM parameters between patients with manometric PFOO and functioning, effective fundoplication (FELF).
• To evaluate treatment outcomes for patients diagnosed with PFOO after LNF.

Main Methods:

• Retrospective analysis of 106 patients undergoing LNF and postoperative HRM at two international centers.
• Categorization into PFOO and FELF groups based on HRM findings and the Padova Classification.
• Comparison of HRM parameters (LES basal pressure, IRP, esophageal body function) and clinical dysphagia assessment.

Main Results:

• The PFOO group exhibited significantly higher LES basal pressure, integrated relaxation pressure (IRP), and LES length compared to the FELF group.
• PFOO patients showed increased incidence of elevated intrabolus pressure and premature swallows.
• Dysphagia was reported in 89% of PFOO patients versus 5% in FELF patients; 89% of PFOO patients improved after retreatment.

Conclusions:

• High-resolution manometry (HRM) with the Padova Classification can effectively differentiate between obstructive and functional fundoplications post-LNF.
• HRM plays a vital diagnostic role in managing postoperative dysphagia after LNF.
• Treatment interventions for PFOO demonstrate high success rates for symptom improvement.