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State patient's sex on the request form.
7 - 9 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
0.1 mL (Note: This volume does not allow for repeat testing.)
Red-top tube or gel-barrier tube
Separate serum from cells.
Chylous serum; gross bacterial contamination. Plasma should be avoided since fibrin may result in the appearance of nonspecific precipitation, which may adversely affect interpretation.
Evaluate the classical complement pathway
Radial immunodiffusion (RID)
0 to 1 y
2 to 5 y
6 to 17 y
Levels are depressed in various immunodeficiency states including x-linked hypogammaglobulinemia and severe combined immunodeficiency (10% to 25% of normal levels). Genetic deficiencies of C1q have been described.
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|016824||Complement C1q, Quantitative||4478-4||016824||Complement C1q, Quantitative||mg/dL||4478-4|
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