Sign in →

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. 

Additional Codes

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

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