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Test Code C1 C 1 Complement

Clinical System Name

C1 Complement


C1 Complement
Complement C1

C1Q Protein Level (Quantitative)

Sample Requirements

Specimen: Whole Blood

Container(s): Gold SST, Red, or Gold Microtainer

Preferred Vol: 2.0 mL

Minimum Vol: 1.0 mL


Note: Serum must be separated from cells within THREE hours. Serum must be frozen within three hours of collection.

Processing Instructions

Reject due to: 

Spin: Y

Aliquot: Y

Temp: -70 C

Storage Location: Serum must be frozen within THREE hour of collection. Spin blood, freeze 0.5 mL (0.1 mL Minimum) serum in a plastic aliquot tube affixed with a large Cerner label. Freeze in the CPA -70° C freezer, Send Outs rack.


Off-site collection: Spin, aliquot, and freeze serum within THREE hours of collection. Transport frozen.


Specimen Type Temperature Time
Whole Blood / Serum Room temp 3 h
Serum Frozen Indefinitely



STAT Performed TAT
N T and F 3 - 5 d


Performing Laboratory

University of Washington Medical Center

Department of Laboratory Medicine

Immunology Lab

1959 NE Pacific St, NW220
Seattle, WA 98195


Phone Number: (206) 520-4600


Department: Send Outs

Phone Number: (206) 987-2563

CPT Codes



Method: Radial Immunodiffusion (RID)

Analytical Volume: 0.1 mL Serum


Reference Range

Female Male
Age Range Age Range
0- 12 - 25 0- 12 - 25


Send Out Instructions

Reference Test Name: Complement C1
Reference Test Number: C1
Instructions: Send out Monday - Friday with the UW courier.