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D-Xylose Absorption, serum
|Patient Preparation||Adults must have fasted for 8 hours prior to sample collection. Children must fast for 4 hours before sample collection.
Outpatients should be given a prescription for the proper dose of (D+)-xylose powder to be obtained at an outside pharmacy.
|Collection Instructions||Note the dose on the requisition and in the patient's chart. Dose: 1.0 g/kg-maximum 25 g. Draw sample 1 hour after D-xylose administration.|
|Container type||Gray top|
|Amount to Collect||4 mL blood|
|Preferred volume||4 mL blood|
|Min. Volume||1 mL blood|
|Processing notes||Mix the sample well and refrigerate it-do not freeze. Enter the xylose dose in the computer at the time of accession. Order Quest # 6924.
≥ 18 year olds
|Turn around times||Blood test set up as needed; urine test performed Monday-Friday. Turnaround time: 1-4 days.|
|Last Updated||11/21/2013 11:44:13 AM|
If you have additional questions regarding this test, please call: 415-353-1667