Specimen: 2 mL (0.5 mL min.) serum from 1 SST. Ship refrigerated or frozen. Overnight fasting is preferred.

Stability (Room): 8 hrs

Stability (Refrigerated): 1 week

Stability (Frozen): 2 weeks

Method: Immunoturbidimetry

Comment: Also see HISTOPATHOLOGY, DIRECT IMMUNOFLUORESCENCE TESTS.

Price: Contact Medilab

Turnaround time (TAT): 5 – 15 days

Usage: C4 is critical to activation of classical pathway. Decreased levels are seen in patients with SLE, Immune Complex disease and Hereditary angioedema. Congenital deficiency of C4 increases the risk of recurrent bacteremia especially S.pneumoniae. This assay is useful in the diagnosis of C4 deficiency and for investigation of a patient with an undetectable Total complement (CH50) level.

Specialty: Nephrologist, Physician

Disease: Disorders of Complement system

Components:

Courier Charges:

Home Collection: Available

Department:

Pre-test Information: Overnight fasting is preferred.