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Beta-2 Microglobulin, urine
| Item | Value | ||||
|---|---|---|---|---|---|
| Approval req'd? | No | ||||
| Available Stat? | No | ||||
| Test code | B2MU | ||||
| Test group | Beta-2-Microglobulin | ||||
| Performed by | Quest | ||||
| Sendout? | Yes | ||||
| Method | Fixed rate time nephelometry | ||||
| Patient Preparation | Patient should void bladder, then drink at least 500 mL of water. A urine sample should be collected within 1 hour. | ||||
| Collection Instructions | Deliver asap to laboratory as Beta-2-microglobulin in unstable in acidic urine. Results may be inaccurate if the sample is > 2 hours old when received |
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| Container type | Urine cup | ||||
| Amount to Collect | 10-20 mL | ||||
| Sample type | Random urine | ||||
| Preferred volume | 1 mL urine | ||||
| Min. Volume | 0.5 mL urine | ||||
| UCSF Rejection Criteria | Delivered to lab > 30 min after collection | ||||
| Processing notes | Adjust urine to pH 6-8 with 1M NaOH. Freeze aliquot. Order Quest # 4150N | ||||
| Units | µg/g Creatinine (mcg/g Creatinine) | ||||
| Normal range |
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| Synonyms | Beta-microglobulin; Microglobulin, beta-2 | ||||
| Stability | Room temperature 8 hours, refrigerated 1 week, frozen at -20C 2 months. | ||||
| Turn around times | Set up 6x per week. Turnaround 4-5 days | ||||
| Additional information | Beta-2-microglobulin is unstable in acid urine. Samples should be alkalinized by laboratory staff within 2 hours of collection to prevent inaccurately low results. | ||||
| CPT coding | 82232-90, 82570-90 | ||||
| LOINC code | 13485-8 | ||||
| Last Updated | 4/29/2013 10:45:53 AM | ||||
| Entry Number | 1137 |
If you have additional questions regarding this test, please call: 415-353-1667