title: Comparison of 75SeHCAT retention half-life and fecal content of individual bile acids in patients with chronic diarrheal disorders.
abstract: Measurement of the retention of 23-75Se-25-homotaurocholic acid (SeHCAT) has been suggested as a new test for ileal function. We investigated 31 patients with chronic diarrhea, 10 with ileal Crohn's disease and 21 with diarrhea but without ileal disease. The whole-body retention half-life of 1 mu Ci SeHCAT was determined and compared to the fecal content of total and individual bile acids. Patients with ileal disease had increased primary fecal bile acids (chenodeoxycholic acid: mean 6.95 mg/g dry weight, range 3.15-10.6 mg/g; cholic acid: mean 18.15 mg/g, range 10.3-33.9 mg/g) and a short SeHCAT retention (mean 11.9 h, range 2-24 h), whereas patients with intact ileum had normal fecal bile acids and a SeHCAT retention of 85.9 h (range 28-216 h). SeHCAT retention half-life differentiated well between patients with ileal disease and patients with normal ileum, thus indicating the SeHCAT test as a valid investigation method for detection of primary bile acid malabsorption in patients with chronic diarrhea and ileal dysfunction.
mesh_terms: D000293:Adolescent; D000328:Adult; D001647:Bile Acids and Salts / Q000378:metabolism*; D002908:Chronic Disease; D003424:Crohn Disease / Q000378:metabolism; D003967:Diarrhea / Q000378:metabolism*; D005243:Feces / Q000378:metabolism*; D005260:Female; D006207:Half-Life; D006801:Humans; D007082:Ileum / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012643:Selenium / Q000378:metabolism*; D013656:Taurocholic Acid / Q000031:analogs & derivatives* / Q000378:metabolism
chemical_list: D001647:Bile Acids and Salts; D013656:Taurocholic Acid; C033638:23-seleno-25-homotaurocholic acid; D012643:Selenium