Specimen

Urine

Collection Medium:

Minimum:

Preferred Minimum:  5.0 mL from a 24-hour urine collection.
Absolute Minimum:  0.5 mL
No preservative

Delivery Instructions:

Deliver to laboratory immediately after collection.

Analytic Time:

within 10 days

Reference Range:

HYPOXANTHINE:  20-100 umol/24 hours
XANTHINE:  20-60 umol/24 hours

Comments:

Urine Preservative Collection Options
Note:  24-hour volume is required on request form for processing.  The 
addition of preservative or application of temperature controls must 
occur within 4 hours of completion of the collection.

Ambient:            No
Refrigerate:        Yes
Frozen:          Preferred
6N HCl:             No
50% Acetic Acid:    No
Na(2)CO(3):         No
Toluene:            No
6N HNO(3):          No
Boric Acid:         No
Thymol:             No

Methodology:

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

CPT Code:

83789

See Additional Information:
Specimens Requiring Immediate Delivery
Urine Tests Requiring no Preservatives