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Immunoglobulin total light chains, urine-7873

Test info

Test name:

Immunoglobulin total light chains, urine

Test number:

7873

Excellian order number:

LAB7873

Abbreviation:

ILU

Alternate names:

Immunoglobulin light chains
Kappa light chains
Kappa/lambda light chains
Lambda light chains
Urine light chains

Useful for:

Monitoring patients whose urine demonstrates large M-spikes
Confirming the quantitation of specimens that show M-spikes by electrophoresis
Detecting urine monoclonal proteins and identification of specimens that need urine protein electrophoresis

Specimen

Specimen type:

Urine, 24 hr

Collection container:

24 hr urine collection container, no additive

Volume:

24 hour urine collection

Minimum volume:

10 mL aliquot from a 24 hour urine collection

Collection instructions:

How to collect a 24 hour urine sample

Processing instructions:

Temperature controls must occur within 4 hours of completion of collection
Mix well
Transfer a 10.0mL aliquot to a Screw cap transfer vial/tube (Mayo T914)

Transport container:

Screw cap transfer vial/tube (Mayo T914)

Alternate specimen type:

Urine, random

Alternate collection container:

Screw cap plastic container (non sterile)

Alternate processing instructions:

Transfer a 10.0mL aliquot to a Screw cap transfer vial/tube (Mayo T914)

Transport and stability:

Refrigerated (preferred) - 7 days

Ambient - 72 hours

Frozen - 20 days

Performance

Performing lab:

Mayo Clinic Laboratories (TLCU/87934): R-NX

Days set up:

Mo - Fr

TAT:

1 - 3 days

Method:

Nephelometry

Clinical and Interpretive info

Reference ranges:

Kappa total: < 0.9 mg/dL

Lambda total: < 0.7 mg/dL

Kappa/lambda ratio: 0.70 - 6.20

Billing

CPT codes:

83521 x 2

Hospital EAP/charge code:

17024276
17024277

Clinic EAP/charge code:

308352102
308352103

Tracking

Date created:

06/01/2007

Revised date:

01/04/2024

Review date:

01/04/2024