Which of the Following Statements Are True of the D-Xylose

question 15

Multiple Choice

Which of the following statements are true of the D-xylose absorption test?
1) The amount of D-xylose excreted over a 5-hour period is closely correlated with the amount absorbed in the GI tract.
2) Most persons demonstrate plasma levels greater than 300 mg/L in one of the samples collected.
3) Low levels of urine or plasma D-xylose are suggestive of an absorptive defect in the jejunum.
4) High levels of D-xylose are seen in ascites, vomiting, delayed gastric emptying, improper urine collection, and high-dose aspirin therapy.

• A)1, 2, 3, 4
• B)1, 2, 3
• C)1, 3, 4
• D)2, 3, 4

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