title: The value of urine creatinine analysis in the evaluation on Schilling tests.
abstract: We performed a prospective study to assess the clinical value of evaluating the adequacy of 24-hour urine specimens submitted for Schilling tests. A total of 121 specimens were evaluated of which 51 had abnormal vitamin B12 excretion values. Of those 51, there were 23 with apparently inadequate total creatinine content (implying a collection of less than 24 hours). Six of 12 specimens with less than 600 ml had adequate total creatinine content as well as normal vitamin B12 excretion. Compared with evaluation of specimen volume alone, these data support the inexpensive urine creatinine assay as a valuable source of information regarding the adequacy of 24-hour urine collections thereby improving the specificity of the Schilling test.
authors.affiliation: Nuclear Medicine Service, Wilford Hall USAF Medical Center, Lackland AFB, Texas.
authors.forename: J D
authors.initials: JD
authors.lastname: Heironimus
authors.forename: R D
authors.initials: RD
authors.lastname: Borchert
authors.forename: F L
authors.initials: FL
authors.lastname: Weiland
mesh_terms: D003404:Creatinine / Q000652:urine*; D006801:Humans; D011446:Prospective Studies; D012546:Schilling Test; D013048:Specimen Handling
chemical_list: D003404:Creatinine