Thoroughly mix entire collection (24-hour) in one container. Do not exceed 4 mL in Tubes. Preserved: Transfer 4 mL aliquot to an ARUP Transport Tube with Sulfamic Acid (ARUP supply #48098). Available online through eSupply using ARUP Connect or contact ARUP client services at (800) 522-2787. (Min: 1.5 mL) Mix well. Freeze immediately. Unpreserved: Transport a 4 mL unadjusted aliquot of urine to an ARUP Standard Transport Tube. (Min: 1.5 mL) Freeze immediately.
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered
Stability (from collection to initiation)
After collection complete: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month
Performed
Mon-Fri
Reported
1-4 days
Ordering Recommendations
Evaluate individuals with calcium oxalate renal calculi.
Remarks
Record total volume and collection time interval on transport tube and test request form.
Per 24h calculations are provided to aid interpretation for collections with a duration of 24 hours and an average daily urine volume. For specimens with notable deviations in collection time or volume, ratios of analytes to a corresponding urine creatinine concentration may assist in result interpretation.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Methodology
Quantitative Spectrophotometry
CPT Codes
83945
Notes
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.
Collection
Alias
EPIC-LABS11191; ARUP-0020482
Patient Preparation
Patient should avoid ingestion of vitamin C prior to collection.
Thoroughly mix entire collection (24-hour) in one container. Do not exceed 4 mL in Tubes. Preserved: Transfer 4 mL aliquot to an ARUP Transport Tube with Sulfamic Acid (ARUP supply #48098). Available online through eSupply using ARUP Connect or contact ARUP client services at (800) 522-2787. (Min: 1.5 mL) Mix well. Freeze immediately. Unpreserved: Transport a 4 mL unadjusted aliquot of urine to an ARUP Standard Transport Tube. (Min: 1.5 mL) Freeze immediately.
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered
Stability (from collection to initiation)
After collection complete: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month
Performed
Mon-Fri
Reported
1-4 days
Ordering Recommendations
Evaluate individuals with calcium oxalate renal calculi.
Remarks
Record total volume and collection time interval on transport tube and test request form.
Per 24h calculations are provided to aid interpretation for collections with a duration of 24 hours and an average daily urine volume. For specimens with notable deviations in collection time or volume, ratios of analytes to a corresponding urine creatinine concentration may assist in result interpretation.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Methodology
Quantitative Spectrophotometry
Administrative
CPT Codes
83945
Notes
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.
Laboratories.