Oxalate
Label Mnemonic: | OXALU |
Epic code: | LAB421 |
Downtime form: | Doctor/Provider Orders - Pathology Core and Specialty Care Nursery |
Commercial Mailout Laboratory
6240-8 RCP
356-8593
6240-8 RCP
356-8593
Specimen(s):
Urine More information
Specimen
Instructions:
Patient should avoid ingestion of vitamin C prior to collection.
Refrigerate during collection in plastic container. 24 hr specimen must reach Core Laboratory with 24 hrs of finishing collection. Submit dates and times of collection on requisition.
Refrigerate during collection in plastic container. 24 hr specimen must reach Core Laboratory with 24 hrs of finishing collection. Submit dates and times of collection on requisition.
Minimum:
Preferred Minimum: 4.0 mL of well mixed 24 hr urine sample.
Refrigerate during collection and submission to lab.
Rejection Criteria:
Urines not refrigerated during collection.
Delivery Instructions:

Turn Around
Time:
1-4 days upon receipt in reference laboratory
Reference Range:
Components Reference Interval Creatinine) Male (24-hours) 3-8 years: 140-700 mg/d 9-12 years: 300-1300 mg/d 13-17 years: 500-2300 mg/d 18-50 years: 1000-2500 mg/d 51-80 years: 800-2100 mg/d 81 years and older: 600-2000 mg/d Female 3-8 years: 140-700 mg/d 9-12 years: 300-1300 mg/d 13-17 years: 400-1600 mg/d 18-50 years: 700-1600 mg/d 51-80 years: 500-1400 mg/d 81 years and older: 400-1300 mg/d Oxalate, Urine Male (24 hours) 0-12 years: 7-31 mg/d 13 years and older: 16-49 mg/d Female 0-12 years: 7-31 mg/d 13 years and older: 13-40 mg/d
Interpretive Data:
Reference intervals for random urine samples (mg/L) are not available.
Comments:
Vitamin C (ascorbic acid) quickly degrades to oxalate in non-acidified
urine. Patients should discontinue use of vitamin C supplements at
least 48 hours prior to the start of urine collection and abstain
until collection is complete.
Preservation with Sulfamic Acid before transporting is highly recommended.
Preservation with Sulfamic Acid before transporting is highly recommended.
Methodology:
Quantitative Spectrophotometry
CPT Code:
83945
See Additional Information:
Urine Tests Requiring Preservatives, Refrigeration or Special Containers
Urine Tests Requiring Preservatives, Refrigeration or Special Containers