ARUP's Laboratory Test Directory
| 0050618: Bence Jones Protein, Quantitative Free Kappa & Lambda Light Chains, Urine |
| Test Mnemonic: BJ QUANT | |
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Methodology: Immunofixation Electrophoresis/Nephelometry
Performed: Mon-Fri Reported: 1-5 days |
| Specimen Required: | |
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Collect: 24-hour urine. Urine supernate is also acceptable. Specimen needs to be refrigerated during collection.
Transport: Two 4.5 mL aliquots from a well-mixed 24-hour collection at 2-8°C. (Min: 4.5 mL) Submit specimen in two ARUP Standard Transport Tubes. Pediatric Collection/Transport: 2.5 mL aliquot from a well-mixed 24-hour urine collection at 2-8°C. Remarks: Keep refrigerated at all times. Record total volume and collection time interval on transport tube and test request form. Random urine specimens are acceptable, but not preferred. Unacceptable Conditions: Specimens that are not refrigerated. Stability: Ambient: 2 hours; Refrigerated: 1 week; Frozen: 1 month |
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| Interpretive Data: | |
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Total urinary protein is determined nephelometrically by adding the albumin and kappa and/or lambda light chains. This value may not agree with the total protein as determined by chemical methods, which characteristically underestimate urinary light chains.
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| CPT Code(s): | |
| 84156 Total protein; 86335 IFE; 83883 x2 Nephelometry, kappa/lambda |