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Test Code CGB Cryoglobulin Screen

Important Note

For external clients

Please ensure that sample is clotted at 37°C and serum is separated at 37°C. To provide primary collection tube. Ensure that sample reaches NUH Referral Lab before 5pm Monday to Friday. Sample must be collected and sent on the same day. 

Specimen Requirements

Preferred:
Red Top

Processing Requirements

Specimen Type: Serum
Container/Tube: Red Top

Volume: 6 mL
Collection, storage/ transport Instructions: Collect blood in pre-warmed tube and keep at 37°C. To call BTS at 6772 2305 to arrange for 37°C transport container to ensure sample is kept at 37°C before reaching the lab.

 

Send specimen to the Laboratory immediately.

Specimen Stability

Ambient Not Applicable
At 37°C Freshly drawn samples (preferred)
Refrigerate Not Applicable
Frozen Not Applicable

Specimen Condition

Gross Haemloysis Reject
Icterus OK
Lipaemia OK
Others Insufficient specimen, Kept in ice/refrigerated, NUH patients - sample not sent using the 37°C transport container - Reject

Methodology

Precipitation of Cryoglobulin at 4°C

Days and Times Performed

Monday through Sunday

Routine, TAT 7 day

 

For JCI specimen: TAT 1 day

Reference Interval

Negative

Testing Laboratory

National University Hospital
Transfusion Services, 67722305

Useful For

Screen for presence of abnormal globulins in conditions such as Systemic Lupus Erythematosus, myeloma & lymphoma

Update

Last updated 22/05/2026

LOINC Code Information

12207-7

Additional Codes

EPIC Ordering Code: LAB4000
NBS Code: LBC00291
Service Code: 2012203