Kappa/Lambda Quant Free Light Chain Ratio, Blood
Label Mnemonic: KLFQT
Epic Lab Code: LAB7454
Downtime Form: A-1a General Laboratory Requisition
Chemistry
6240 RCP
356-3527
Specimen(s):
Blood
Collection Medium:
Pink top tube 6 mL (K2-EDTA)
Minimum:
Preferred Minimum: 3 mL whole blood
Rejection Criteria:
Plasma separator tube
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
Lambda Quantitative Free Light Chains 5.7 - 26.3 mg/L Kappa Quantitative Free Light Chains 3.3 - 19.4 mg/L Kappa/Lambda Free Light Chain Ratio 0.26 - 1.65
Comments:
This assay is highly sensitive to increasing concentrations of monoclonal free kappa or free lambda light chains in the serum of patients with evolving or relapsing myelomas.
Methodology:
Turbidimetric
CPT Code:
83883 x2
 
See also:
Kappa Lambda Light Chain, Urine