Test Code C9FX C9 Complement, Functional, Serum
Performing Laboratory
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Reporting Name
C9 Complement, Functional, SSpecimen Type
SerumOrdering Guidance
The total complement 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 total complement level.
Specimen Required
Patient Preparation: Fasting preferred
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Immediately after specimen collection, place the tube on wet ice and allow specimen to clot.
2. Centrifuge at 4° C and aliquot serum into a plastic vial.
3. Within 30 minutes of centrifugation, freeze specimen. Specimen must be placed on dry ice if not frozen immediately.
NOTE: If a refrigerated centrifuge is not available, it is acceptable to use a room temperature centrifuge, provided the sample is kept on ice before centrifugation, and immediately afterward, the serum is aliquoted and frozen.
Reject Due To
Gross hemolysis | OK |
Gross lipemia | Reject |
Gross icterus | OK |
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum | 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
37-61 U/mL
Useful For
Diagnosis of C9 deficiency
Investigation of a patient with a low total (hemolytic) complement level
CPT Code Information
86161
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
C9FX | C9 Complement, Functional, S | 87727-4 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
C9FX | C9 Complement, Functional, S | 87727-4 |