Anti-reflux devices and methods for treating gastro-esophageal reflux disease (gerd)

A device for treating a patient with a gastro esophageal reflux disease, the device comprising:

• an anchor comprising an annular body with a central opening, wherein the anchor is switchable between a compressed configuration for an advancement through an esophagus of the patient and an expanded configuration for residing within a stomach of the patient, wherein the anchor is structured such that the anchor inhibited from a proximal movement back through a diaphragm opening of the stomach into the esophagus in the expanded configuration;
• a retainer coupled to the anchor, wherein the retainer is configured to inhibit a distal movement of the anchor away from the diaphragm opening;
• and
• a valve structure coupled to the anchor, wherein the valve structure is configured to inhibit a passage of at least one of a liquid or a solid proximally from the stomach into the esophagus and configured to allow a passage of at least one of a liquid or a solid distally from the esophagus and into the stomach.