C2 Complement Component

Label Mnemonic:	C2
Epic code:	LAB153
Downtime form:	A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Commercial Mailout Laboratory
6240-8 RCP
356-8593

Specimen(s):

Serum

Specimen Instructions:

Sample must be processed and frozen within 2 hours of blood draw.

Collection Medium:

Red top tube 5 mL (Clot Activator)

Minimum:

Preferred minimum: 1 mL serum

Rejection Criteria:

Plasma is not accepted. Non-frozen specimen. Specimens exposed to repeated freeze/thaw cycles. Specimens left to clot at refrigerated temperature.

Delivery Instructions:

Deliver to laboratory immediately after collection. Critical frozen.

Turn Around Time:

5-10 days upon receipt at reference laboratory.

Reference Range:

1.6-4.0 mg/dL

Interpretive Data:

Decreased C2 levels may be associated with increased susceptibility to infection (especially pneumococcal infections), systemic lupus erythematosus-like disease, rashes, arthritis, nephritis, and with C1- Esterase deficiency. Increased C2 levels are associated with the acute phase response.

Methodology:

Radial Immunodiffusion

CPT Code:

86160

See Additional Information:
Specimens Requiring Immediate Delivery