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d-Xylose Absorption Test, Blood, 2 Hour [7553X]
Test Code147502
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 at 2 hours post oral ingestion of d-Xylose.
Label sample vial with patients name and the time of collection postdose (e.g., 2 hour, etc.).
4 mL blood drawn at 2 hours post oral ingestion of d-Xylose.
Label sample vial with patients name and the time of collection postdose (e.g., 2 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)
Setup Schedule
Set up: Mon, Thurs; Report available: 1-3 days
Reference Range
| <6 years | >14.9 mg/dL |
| ≥6 years | >19.9 mg/dL |
