A Collis gastroplasty is a surgical procedure performed when the surgeon desires to create a Nissen fundoplication, but the portion of esophagus inferior to the diaphragm is too short. Thus, there is not enough esophagus to wrap. A vertical incision is made in the stomach parallel to the left border of the esophagus. This effectively lengthens the esophagus. The stomach fundus can then be wrapped around the neo-esophagus, thus reducing reflux of stomach acid into the esophagus.

In fact, gastroplasty can be used when the length of the intra-abdominal esophagus is short and for anti-reflux action such as Nissen fundoplication, it is necessary to increase the intra-abdominal length of the esophagus. At this time, part of the upper part of the stomach is separated by a stepper, i.e. the stapler fires longitudinally along the esophagus and increases the length of the stomach inside the abdomen. At this time, a tongue is created from the stomach that can be easily rotated on the new esophagus and all kinds of fundoplication operations such as Nissen fundoplication can be done easily.^[1] It was devised by John Leigh Collis (1911–2003),^[2] a British cardiothoracic surgeon, in 1957.^[3]

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