Manometry involves many technical issues, and a complete understanding of all aspects of the esophageal testing process is required to study the human esophagus in a way that yields accurate, technically sound qualitative and quantitative studies that include the measure of esophageal length and positional plotting of transducers within the esophagus. Topics discussed are catheter measurement and memory; checking the system; performing manometry; patient history; intubation technique; marking, mapping, and measuring the esophagus, and analysis of results.