Magnetic Sphincter for Gastroesophageal Reflux Diseaseby NEJMvideo
Video 1: Schematic Drawing of the Magnetic Sphincter.
The magnetic sphincter is composed of magnetic beads sealed in titanium cases.
Video 2: Cross Section Schematic of the Magnetic Sphincter in Closed and Open Position.
Magnets are shown in each case. When closed, the device augments the native lower esophageal sphincter and helps prevent reflux; the device opens with the passage of food and to allow belching and vomiting. Expansion of the individual beads is limited by linked titanium wires.
Video 3: Ex Vivo Porcine Stomach Model.
A porcine stomach is infused with water and shows free reflux. With the magnetic sphincter in place, reflux is controlled.
Video 4: Animated Video of the Magnetic Sphincter in a Patient.
After placement of the magnetic sphincter in the region of the gastroesophageal junction, reflux is controlled. Passage of a food bolus expands the device and allows for normal eating.
Video 5: Laparoscopic Placement of the Magnetic Sphincter in a Patient.
The area of the gastroesophageal junction is surgically exposed. The device is tunneled posteriorly and positioned around the region of the gastroesophageal junction. Care is taken to avoid esophageal compression.
Video 6: Barium Swallow in a Patient, 1 Year after Implantation.
The bolus pressure of swallowed food and barium expands the device. The magnetic beads are spread apart as food and barium approach and pass through the region of the gastroesophageal junction.