d-Xylose Tolerance Test
is a topic covered in the Davis's Lab & Diagnostic Tests
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To assist in the differential diagnosis of small intestine malabsorption syndromes such as celiac, tropical sprue, and Crohn’s diseases.
Plasma collected in a gray-top (fluoride/oxalate) tube and urine (from a 5-hr collection) in a clean amber plastic container.
|Dose Given||Conventional Units||SI Units (Conventional Units × 0.0666)|
|Infant dose 0.5 g/kg (max. 25 g)||Greater than 15 mg/dL after 2 hr||Greater than 1 mmol/L|
|Pediatric dose 0.5 g/kg (max. 25 g)||Greater than 20 mg/dL after 2 hr||Greater than 1.3 mmol/L|
| 25 g||Greater than 25 mg/dL after 2 hr||Greater than 1.7 mmol/L|
| 5 g (given if patient is known or expected to have severe symptoms)||Greater than 20 mg/dL after 2 hr||Greater than 1.3 mmol/L|
|Children||Greater than 16%–40% of dose in 5-hr urine sample|
|Adults||Greater than 16% or greater than 4 g of dose in 5-hr urine sample|
|Older adults (65 yr and older)||Greater than 14% or greater than 3.5 g of dose in 5-hr urine sample|
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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "D-Xylose Tolerance Test." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425029/all/d_Xylose_Tolerance_Test.
Bladh ML, Van Leeuwen AM. D-Xylose Tolerance Test. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425029/all/d_Xylose_Tolerance_Test. Accessed April 19, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). D-Xylose Tolerance Test. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425029/all/d_Xylose_Tolerance_Test
Bladh ML, Van Leeuwen AM. D-Xylose Tolerance Test [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 19]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425029/all/d_Xylose_Tolerance_Test.
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T1 - d-Xylose Tolerance Test
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