The purpose of this video tutorial is to familiarize users of the Geometry Fundoplication Calculator application with how it is utilized by surgeons while performing closure of the hiatus and during the creation of 360° and 270° fundoplication operations. It is not intended as an in depth review of the performance of any of these operations.It only touches on those aspects of the operations that would be affected by the information derived from the use of the application.The format provides a single, long video tutorial which goes over all of the significant aspects of use of the application in sequential order. The important areas are then broken down into “Chapters” covering each of the significant individual portions of the longer video, in case users may want a “refresher” tutorial that is brief, and only covers those areas in need of review. The 270° fundoplication video references the calibration video and the 360° fundoplication video. It is presumed that the user is familiar with these chapters before reviewing the 270° fundoplication chapter.