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Test Code LAB3114 Kappa and Lambda Free Light Chains

Test Name Alias

KappaLambda | 4191

Collection Instructions

Specimen Collection: Blood

Container(s): Gold Top (Serum Separator-SST Gel)

Preferred Volume to Collect: 5.0 mL

Minimum Volume to Collect: 2.0 mL

Neonate Volume to Collect: 2.0 mL

Capillary collect ok: Yes

Microtainer acceptable: Yes

Collection Instructions:

  • Gently invert gold tube(s) 8 - 10 times to mix clot activator with blood.
  • Specimen should be processed within 2 hours – See Processing Instructions.

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Serum

Centrifuge/Spin: Yes

Aliquot: No

Processing Instructions:

  • Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.

Transport Temperature: Refrigerate

Rejection Criteria

Specimen not centrifuged within 2 hours

Specimen Stability

Ambient: 8 hours

Refrigerate: 7 days (21 days if serum is aliquoted to separate transfer vial)

Laboratory Retention: 7 days

Test Frequency

Available Monday, Wednesday, and Friday.

Reference Range

Kappa Free Light Chain: ≥18 years: 0.33 - 1.94 mg/dl
Lambda Free Light chain: ≥18 years: 0.57 - 2.63 mg/dl
Kappa Lambda FLC Ratio: ≥18 Years: 0.26 - 1.65 mg/dl

Performing Department


Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI




83883 x2

CDM Code

4058999, 4059000

Epic Test ID


Interface Order Alias



Kappa Free Light Chain: 36916-5

Lambda Free Light Chain: 33944-0

Kappa Lambda FLC Ratio: 48378-4

KL Prozone: N/A

Mayo Access Code


Reviewed Date