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Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog
OXALIC ACID, 24-HOUR URINE WITHOUT CREATININE |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB2795 Geisinger Epic ID: 17721 | |
SPECIMEN COLLECTION |
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Specimen type: |
24-hour urine collection | |
Preferred collection container: |
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Specimen required: |
10 mL aliquot of 24-hour urine, as above; minimum volume 2 mL. | |
Special notes: |
Mix well. Estimate total collection volume from 24-hour urine container. Remove required aliquot. Record total volume on both aliquot tube and request slip (if applicable). | |
Patient preparation: |
Patient should refrain from taking excessive amounts of ascorbic acid or oxalate-rich foods (i.e., spinach, coffee, tea, chocolate, rhubarb) for at least 48 hours before collection. | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Adjust pH to less than 3.0 before aliquotting for testing. Mix well and aliquot 10 mL. | |
Transport temperature: |
Refrigerated (preferred). Refrigerated or frozen specimen also acceptable. | |
Specimen stability: |
Room Temperature: 6 days. Refrigerated: 7 days. Frozen: 4 months. | |
Rejection criteria: |
Stability limits exceeded. | |
TEST DETAILS |
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Reference interval: |
24-Hr Urine: 3.6-38.0 mg/24 hr Random, Timed (not 24-Hr) Urine: Reference ranges are not available. |
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CPT code(s): |
83945 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Test includes: |
Oxalic acid, 24-hour urine. | |
Methodology: |
Spectrophotometric (Colorimetric) |
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Synonyms: |
240XAL, Oxalic acid, 24-hour; Ethanedioate Quest test code 11318
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Clinical significance: |
Excessive oxalates in the urine may lead to oxalate kidney stones. Hyperoxaluria may be due to a rare inherited metabolic disorder in which the body produces excess of the salt oxalate, leading to stone formation. | |