The invention relates to an intraluminar method of treating a reflux disease in a patient by implanting a device comprising an movement restriction device that, when implanted in a patient, fills a volume in the patient's abdomen that is close to and at least partially above the patient's cardia when the patient is in a standing position. The invention further relates to a method of restoring the location of the cardia in a patient suffering from a reflux disease and to an instrument suitable to use with intraluminar method and/or restoration method. Also disclosed are instruments treating a patient suffering hiatal hernia and providing a movement restriction device to be invaginated in the stomach fundus wall.
