Free Kappa Lambda Light Chains, Blood (Referred Out) - Saskatoon

Overview

Alias

• FLC ratio
• Kappa/Lambda FLC​
• Free light chains

Specimen Information

Specimen types accepted

• Serum

Specimen collection container

• Preferred collection container: Gold (gel) 5.0 mL
• Alternative collection container: Red (no additive) 6.0 mL

Required volume

• Optimal volume: 4.5 mL full collection tube
• Minimum volume: 1 mL serum

(Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)

Rejection criteria

• Pathology and Laboratory Medicine Acceptance and Rejection Criteria

Performance

Days/times performed

Availability	Shipped overnight Mondays and Wednesdays 2 day turnaround time once received at testing laboratory
Testing site	Referred out by St. Paul’s Hospital Laboratory to Dynacare (London, Ontario)

Maximum laboratory time

Results Reporting

• 2 day  turnaround time once received by testing laboratory
• Shipped overnight Mondays and Wednesdays

Other information

Additional Comments

• Serum-free light chain testing is utilized to identify, diagnose, and track plasma cell disorders such as multiple myeloma, primary amyloidosis, and associated conditions, as well as to assess treatment efficacy.

Last Updated: November 5, 2025