Silver, Urine
| Silver, Urine | | | |
| Number | | 071639 |
| CPT | | 82570; 83018 |
| Related Information | | Silver, Plasma |
| Synonyms | | Ag, Urine |
| Test Includes | | Creatinine, urine; silver, urine; silver:creatinine ratio |
| Special Instructions | | State 24-hour volume on the request form, if applicable. Do not use preservative. Preservatives used for routine analysis may contain mercuric oxide (ie, Stabilur), which interferes with all metal testing. If both a routine urinalysis and metal testing are ordered, please submit a separate urine specimen (containing no additive) for the metal testing. |
| Specimen | | Urine (random or 24-hour) |
| Volume | | 5 mL |
| Minimum Volume | | 1.5 mL |
| Container | | Plastic urine container, no preservative |
| Collection | | Optional protocol: Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Avoid contact with metal during collection. Screw the lid on securely. |
| Storage Instructions | | Maintain specimen at room temperature. |
| Reference Interval | | Environmental exposure: 0.0-0.9 μg/L, 0.0-0.9 μg/24 hours; silver:creatinine ratio: 0.0-0.9 μg/g creatinine1 |
| Methodology | | Inductively-coupled plasma-mass spectrometry (ICP-MS) |
| Footnotes | | - Lauwerys RR and Hoet P, Industrial Chemical Exposure: Guidelines for Biological Monitoring, 2nd ed, Boca Raton, FL: Lewis Publishers, 1993, 292
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