basal sphincter

ba·sal sphinc·ter

the thickening of the circular muscular coat at the base of the ileal papilla at the terminal ileum.
References in periodicals archive ?
TABLE 2: Levels of alanine aminotransferase, aspartate transaminase, alkaline phosphatase, and [gamma]-glutamyl transpeptidase in patients with normal or elevated basal sphincter of Oddi pressure.
Diagnosis of sphincter of Oddi dysfunction is established upon finding a basal sphincter pressure of 40 mm Hg or greater as measured by a water-perfused catheter inserted into the pancreatic and common bile ducts.