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

Specimen Type: Serum
Container/Tube: Red Top

Volume: 6.0 mL
Collection 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. Transport container cannot be sent via pneumatic tube, please arrange for samples to be sent to lab by hand once collected.

Specimen Stability

Specimen Type	Serum
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 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

Service Code

2012203

Update

Last updated 16/06/2025

Laboratory Code

LAB4000

LOINC Code Information