Abstract
We have developed a pressure sensor based on a semiconductor for the purpose of mesuring the function of the papillary region. When the function of terminal part of the choledochus was examined by the use of the pressure sensor, the wave type in the patients free from biliary disease showed a regular pattern, whereas the wave type in the patients with choledocholithiasis showed an irregular pattern. An irregular-wave pattern was seen in 53% of the 19 patients with duodenal ulcer. These findings suggest that there is a close correlation between the functional disorder in the papillary region and pathologic manifestation of the surrounding organs. In the diagnosis of the functional disorder in the papillary region, the pressure sensor method should be worthy of trial ak' ig with other clinical and laboratory examination.
