Comparative Outcomes of Magnetic Sphincter Augmentation and Fundoplication in Revisional Surgery

Abstract

Background: Outcomes of laparoscopic revisional surgery involving Magnetic Sphincter Augmentation (MSA) have not been clearly delineated, whether MSA was the presenting or the revisional surgery. We compared safety and clinical outcomes of 4 main categories: fundoplication revised to fundoplication (F-F); fundoplication to MSA (F-M), MSA to fundoplication (M-F) and MSA to MSA (M-M). Methods: Analysis of prospective data from 10 U.S. sites participating in the Registry of Outcomes of Anti-Reflux Surgery (ROARS). Patients had undergone at least one prior procedure on the esophagogastric junction with subsequent need for revisional surgery. Results: Between 2/1/2005 and 1/19/23, 742 patients underwent 819 revisional surgeries, of which 645 patients had 722 surgeries in the 4 main categories. Seventy-six percent had their prior operation elsewhere. Indications for reoperation (GERD, hiatal hernia, dysphagia, gas-bloat) were similar across categories. Preoperative and intraoperative findings disclosed disruption of prior hernia repair in 80% and 97% of patients respectively. Hernia size was larger with an antecedent fundoplication (13% >5 cm, 37% 3-5 cm) compared to patients with prior MSA (1.5% >5 cm, 18% 3-5 cm ( P < .0001). Revision of fundoplication resulted in 11% intraoperative complication rate, versus 2% for MSA. Six hundred patients (73.2%) were followed a mean of 2.7 years. Subsequent operation was performed on 77 (12.7%) a mean of 2.5 years; no difference between categories. Kaplan-Meier analysis showed equivalent subsequent reoperation rates at 5 years (20% ± 5%). Similar improvements in GERD-HRQL, bloating, dysphagia scores, ability to belch or vomit were seen. Conclusions: Over 95% of patients had disruption of the hiatus requiring repair, though prior MSA was associated with far fewer >3 cm hernias than prior fundoplication. Patients with an antecedent MSA can be revised with similar safety and outcomes as those having an antecedent fundoplication. MSA has equivalent results to fundoplication when used as a revisional procedure post antecedent fundoplication.