Advanced Diagnostic Laboratories

Collect

Plasma from a lavender top (EDTA) tube is the only acceptable sample type. Mix sample thoroughly.

Specimen Preparation

Centrifuge at room temp within one half hour of collection; preferably immediately after venipuncture. Transfer the cell-free plasma to a clean tube and immediately freeze the cell-free plasma on dry ice or at -70°C.
Preferred volume: 1 mL plasma, frozen

Pediatric Collection

Minimum volume: 250 µL plasma, frozen

Unacceptable Conditions

Thawed specimen.

Storage Transport Temp

Send frozen plasma Priority Overnight via FedEx and in a well insulated container on dry ice.

Stability

Frozen at -70°C: 1 year

Methodology

Radial Immunodiffusion (RID)

Reported

Up to 4 weeks

Department

Complement Lab

Synonyms

Acquired Angioedema (C1q Level);Radial Immuno Assay (C1q Level);Angioedema (C1q Level);C1q Non-Binding;Hereditary Angioedema (C1q Level);Complement (C1q Level);C1q Antigen

Related Tests

Acquired Angiodema: C1-INH function (CEIF), C1-INH level (CEIQ), C4 level (C4), C1-inhibitor autoantibody (CEIAP)

Reference Interval

Human Male: 83-125 mcg/mL
Human Female: 83-125 mcg/mL

CPT Code

86160