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d-Xylose Absorption Test, Blood, 1 Hour
Test Code1199X
CPT Codes
84620
Preferred Specimen
4 mL whole blood collected in a sodium fluoride (gray-top) tube
Patient Preparation
For fasting test, patient should fast overnight before blood collection
Minimum Volume
1 mL
Instructions
NOTE: This test cannot be performed at a Patient Service Center because of the preparation step required for the d-Xylose solution.
4 mL blood, drawn 1 hour post oral ingestion of d-Xylose. Label sample vial with patient's name and the time of collection postdose (e.g. 1 hour, etc.).
4 mL blood, drawn 1 hour post oral ingestion of d-Xylose. Label sample vial with patient's name and the time of collection postdose (e.g. 1 hour, etc.).
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
Colorimetry (C)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Mon, Thurs; Report Available: 1-3 days
