False statement regarding Schilling test is:
Schilling test - its test useful in diagnosis of etiology of vitamin B12 deficiency This test is divided into 2 main stages Stages Steps Result Stage 1 Oral radiolabeled vitamin B12 is given followed by unlabeled IM VITAMIN B12 A 24-hour urine collection monitors the absorption and the excretion Normal finding:-Excreting- 8 to 40% of radioactive vitamin B12 Abnormal:-any defect in absorption at terminal ileum Do Stage 2 Stage 2 Stage 1 is repeated along with an oral dose of intrinic factor 24 hour urine collection monitors the absorption and the excretion Normal urine excretion means Pernicious anemia If abnormal:- Fuher testing for cause cause:- crohn's disease Small bowel bacterial overgrowth syndrome Diphyllobothrium latum infection
Unlabelled B12 is given IM
Labelled B12 given orally
Vit B12 excreted in urine
Abnormal test rules out primary intestinal malabsorption
Vitamins and Minerals