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D-Xylose Absorption, urine

Item Value
Approval req'd? No
Available Stat? No
Test code MOLT (Order in Apex as 'Miscellaneous Outside Lab Test' using the complete test name above)
Test group D-Xylose
Performed by Quest
Sendout? Yes
Method Colorimetry
Collection Instructions Refrigerate container during collection.
Container type 24 hour urine collection container

Click here for Urine Preservative Requirements
Amount to Collect Entire urine output over 5 hour period
Sample type 5-hour urine
Preferred volume 5 mL urine
Min. Volume 1 mL urine
UCSF Rejection Criteria Container not refrigerated during collection.
Processing notes Transfer urine sample promptly to a gray top vacutainer tube containing fluoride and oxalate to inhibit metabolism of the xylose. Mix well and refrigerate, do not freeze.

Enter the xylose dose in the computer at the time of accession and record the total urine volume on the request slip and the gray top tube. Order Quest # 6925
Units g
Normal range
≥ 18 year old > 4.0 g excreted in 5 hours after a 25 g dose
≥ 18 year old > 1.2 g after a 5g dose
Child 16-33% of the ingested dose
Turn around times Urine test performed Monday-Friday. Turnaround time: 1-4 days.
Last Updated 2/20/2014 3:18:41 PM
Entry Number 1016
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