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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 - 150 Years: 0.33 – 1.94 mg/dL


Kappa Lambda FLC Ratio
≥18 Years -150 Years: 0.26 – 1.65 mg/dL


Lambda Free Light Chain
≥18 Years - 150 Years: 0.57 – 2.63 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


Mayo Access Code



Kappa Free Light Chain: 36916-5

Lambda Free Light Chain: 33944-0

Kappa Lambda FLC Ratio: 48378-4

KL Prozone: N/A

Reviewed Date