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OXALATE, URINE

Mnemonic

OXAL

Specimen Collection Requirements

Patient Preparation

Patient should avoid ingestion of vitamin C prior to collection

Collect

Urine, 24-hour urine collection container. Refrigerate during collection.

Handling

Thoroughly mix entire collection (24-hour or random) in one container. Transfer 4 mL aliquot from the well-mixed 24-hour urine collection to an aliquot tube. Mix well. (Min: 1.5 mL) or if available transfer urine into Sulfamic Acid tube, available by calling Legacy Client Services at 503-413-1234. FREEZE IMMEDIATELY after aliquoting. Record total volume and collection time interval on transport tube and test request form. This information is required for test interpretation.

Preferred Volume

4.0 mL

Minimum Volume

1.5 mL

Transport

Frozen

Rejection Criteria

Frozen urine specimen over 4 mL

Stability

AFTER ALIQUOTING IS COMPLETE: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month

Testing Information

Performed

Mon - Fri

Reported

1-4 days

Method

Spectrophotometry

Referral Lab

ARUP (20482)

Reference Values

Reference Values

MALE 13 years and older:    7-44 mg/day
FEMALE 13 years and older:    4-31 mg/day
CHILDREN (0-12 years):    13-38 mg/day
Reference intervals for random urine samples (mg/L) are not available.

CPT Codes

83945

Last Updated: Thursday, January 5, 2017 03:41:26 AM


Client Services: 503-413-1234