CU index

Alphabetical Test listing

CU index-994

Test name:

CU index

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

Autoimmune chronic urticaria
Chronic urticaria
IgE receptor Ab
UC functional anti-FceR auto antibody

Useful for:

Patients with a chronic form of urticaria who are positive (> 10) with the CU index® have an autoimmune basis for their disease. A positive result does not indicate which autoantibody (anti-IgE, anti-FceRI or anti-FceRII) is present.

Patient preparation information:

Patients taking calcineurin inhibitors should stop medication 72 hours prior to draw
Patients taking prednisone should be off their medication for 2 weeks prior to draw

Specimen type:

Serum

Collection container:

Gold serum separator (SST) tube

Volume:

1.5 mL

Collection instructions:

Immediately following collection, mix sample by gently inverting 5 times

Processing instructions:

Allow sample to clot for a minimum of 30 minutes
Spin within two (2) hours of sample collection

Transport container:

Gold serum separator (SST) tube

Alternate collection container:

Red serum vial/tube - 5 mL

Alternate processing instructions:

Allow sample to clot
Spin within two (2) hours of sample collection
Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum

Alternate transport container:

Transfer vial/tube with cap - 12mL (LabCorp)

Transport and stability:

Ambient (preferred) - 14 days

Refrigerated - 14 days

Frozen - 14 days

Performing lab:

Viracor Eurofins (2103) via LabCorp (820022): R-NX

Days set up:

Mo, We, Fr

TAT:

6 - 11 days

Method:

Ex Vivo Challenge, Cell Culture and Histamine analysis

Reference ranges:

An interpretive report will be provided

CPT codes:

86352

LOINC code:

Result 55141-6

Date created:

05/29/2013

Revised date:

05/14/2024

Review date:

01/08/2024