Free Light Chains with Ratio, Serum, Kappa/Lambda Quantitative

Orderable EAP code:

LAB00920

Billable EAP Codes:

80005520 x 2

CPT Codes:

83883 x 2

Lab Section:

Immunology

Includes:

Kappa Quant Free Light Chains
Lambda Quant Free Light Chains
KAPPA/LAMBDA RATIO, FREE LIGHT CHAINS

Turnaround Time:

Routine: 4 days

Test Schedule:

Monday, Wednesday, and Friday.

Specimen Requirements:

2 mL blood in a GOLD top tube. Separate serum from cells ASAP or within 2 hours of collection. Send 1 mL aliquot refrigerated. 

Stability: 
Plasma is stable for 7 days refrigerated at 2-8 C

Pediatric Specimen Requirements:

Minimum volume = 0.5 mL serum 

Reference Range:

Kappa 3.30 - 19.40mg/L
Lambda 5.71 - 26.30 mg/L
Kappa:Lambda Ratio 0.26 - 1.65

Synonyms:

Free Light Chains
Kappa Qnt Free Light Chains
Kappa/Lambda Free Light Chain Ratio
Lambda Qnt Free Light Chains

Aspergillus Galactomannan Antigen by EIA, Serum

Orderable EAP code:

LAB00057

Billable EAP Codes:

80003512 x 1

CPT Codes:

87305 x 1

Lab Section:

Immunology

Turnaround Time:

Routine: 3 to 5 days

Test Schedule:

Monday and Friday.

Critical Values:

Positive

Specimen Requirements:

4 mL blood in a RED top tube. Specimens are stable indefinitely at -70 C (four freeze-thaw cycle).

Pediatric Specimen Requirements:

1 mL blood in a RED top tube. Specimens are stable indefinitely at -70 C (four freeze-thaw cycle).

Reference Range:

Negative.
Index available by report.

Comments:

This test has not been evaluated in neonates and reference ranges have not been established for this age group.

Negative results do not exclude the diagnosis of invasive Aspergillosis.

False negative results may be seen in patients receiving concomitant anti-fungals, and patients with chronic granulomatous disease and Jobs syndrome.

A single positive test result (index equal to or greater than 0.5) should be clinically correlated by testing a separate serum because many agents (e.g. food, antibiotics) may cross-react with the assay. False positive results may also be seen in very young children, patients with altered intestinal barrier, and patients infected with other genre of fungi such as Penicillium, Alternaria, Histoplasma, and Geotrichum.

If invasive Aspergillosis is suspected in high-risk patients, serial sampling is recommended.

Synonyms:

Aspergillus Galactomannan Antigen

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