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HelpTest Code C1QFX C1q Complement, Functional, Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
C1Q Complement, Functional, SSpecimen Type
Serum RedOrdering Guidance
The total complement (CH50) assay (COM / Complement, Total, Serum) should be used as a screen for suspected complement deficiencies before ordering individual complement component assays. A deficiency of an individual component of the complement cascade will result in an undetectable CH50.
Specimen Required
Patient Preparation: Fasting preferred
Supplies: Sarstedt 5 mL Aliquot Tube (T914)
Collection Container/Tube: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Immediately after specimen collection, place the tube on wet ice.
2. Centrifuge and aliquot serum into plastic vial.
3. Immediately freeze specimen.
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | Reject |
| Gross icterus | OK |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Frozen | 14 days |
Specimen Minimum Volume
0.5 mL
Day(s) Performed
Monday through Friday
Specimen Retention Time
14 daysReport Available
1 to 3 daysReference Values
34-63 U/mL
Useful For
Diagnosis of C1 deficiency
Investigation of a patient with an absent total complement level
CPT Code Information
86161
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| C1QFX | C1Q Complement, Functional, S | 87722-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| C1QFX | C1Q Complement, Functional, S | 87722-5 |