Distance of the Lower Esophageal Sphincter from the upper incisors is -
There are 4 esophageal constrictions. They are at 15cms, 22.5cms, 27.5cms and 37.5 to 40 cms, from the incisors. The fourth constriction is when the esophagus pierces the diaphragm, and here the lower esophageal sphincter is there.
15cm
22.5cm
27.5cm
37.5cm