Site(s) or Laboratory offering Test/Investigation
Also Known as/Frequency of Test
Low C3 / C4 is useful in the investigation of glomerulonephritis, SLE, cryoglobulinaemia and Hereditary angioedema. Many other conditions can activate the complement pathways and result in low complement levels.
Turnaround times (TAT) Urgent/Routine/GP or OPD
2 working days
Reference intervals (adult unless stated)
C3 = 0.75 – 1.65 g/L
C4 = 0.14 – 0.54 g/L