Functional analysis of organic sphincter systems by elastance-measurement. Evaluation of a new method.

The function of organic sphincter systems cannot be described by measuring a static pressure, but only by applying a dynamic procedure of measurement that takes into account the characteristics of smooth muscles. Therefore, the elastance-method has been developed. Experiences with this method and its clinical value are demonstrated when one applies this procedure to measurements in the lower oesophagus, the duodenal papilla and the anal canal.