Ordering Recommendation

Aids in the diagnosis of C1q deficiency.

Mnemonic
COMP 1Q
Methodology

Radial Immunodiffusion

Performed

Tue, Fri

Reported

5-10 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Lavender (EDTA) or pink (K2EDTA).

Specimen Preparation

Separate plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.1 mL)

Storage/Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Grossly hemolyzed, hyperlipemic, or room temperature specimens. Serum or non-EDTA plasma.

Remarks
Stability

Ambient: Unacceptable; Refrigerated: 48 hours; Frozen: 1 month

Reference Interval

109-242 µg/mL

Interpretive Data



Compliance Category

FDA

Note

For the C1q Binding assay, refer to ARUP test code 0050301. The C1q Binding assay detects circulating immune complexes. The Complement Component 1q Level assay quantifies the active fraction component, C1q, of the C1 complement protein complex.

Hotline History
N/A
CPT Codes

86160

Components
Component Test Code* Component Chart Name LOINC
0099130 Complement Component 1q Level 4478-4
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • C1
  • C1 esterase inhibitor
  • C1q
  • C1q Level
  • Complement Component C1q
  • First Component of Complement
  • Total Complement
  • Total Hemolytic Complement Activity
Complement Component 1Q Level