Long-term (>5 Years) Outcomes after Magnetic Sphincter Augmentation

Area of Science:

• Gastroenterology
• Surgical Innovation
• Medical Device Technology

Background:

• Magnetic sphincter augmentation (MSA) is a recognized treatment for gastroesophageal reflux disease (GERD).
• Short-term studies confirm MSA's efficacy, but long-term patient outcomes and objective data are essential.
• Further long-term data are needed to fully support MSA's role in GERD management.

Purpose of the Study:

• To evaluate the long-term (5-year) patient-reported outcomes of magnetic sphincter augmentation (MSA).
• To assess objective measurements of GERD control via pH testing after MSA.
• To determine the durability and safety profile of MSA over a 5-year period.

Main Methods:

• A prospective FDA post-approval study included 200 patients with GERD unresponsive to acid suppression therapy.
• Patients underwent laparoscopic implantation of a magnetic sphincter device.
• Clinical success was defined as a ≥50% improvement in GERD-health-related quality of life scores off proton pump inhibitors (PPIs) at 5-year follow-up.

Main Results:

• 81.6% of 136 follow-up patients achieved ≥50% improvement in GERD-health-related quality of life scores.
• 90.4% of patients achieved freedom from daily PPI use.
• Objective measures showed significant reduction in % time pH <4 (9.1% to 3.2%) and DeMeester scores (29 to 11).

Conclusions:

• Magnetic sphincter augmentation (MSA) provides sustained control of GERD symptoms and reduces the need for PPIs.
• While generally safe and effective, 13% of patients required device explantation, with most experiencing symptom resolution post-explantation.
• MSA demonstrates a favorable long-term safety and efficacy profile for managing GERD.