| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
d-Xylose Absorption Test, Blood, 1 Hour [1199X]
Test Code14733
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 draw 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 draw 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)
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 |
Clinical Significance
The Xylose Absorption Test is useful in screening for carbohydrate malabsorption.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
