Test Overview
Test Methodology

Radial Immunodiffusion

Test Usage

Diagnosis of C8 deficiency; investigation of a patient with absent total complement (CH50) level.

Reference Range *

49-106 mcg/mL

Test Details
Days Set Up
Varies
Analytic Time

Up to 4 weeks

Soft Order Code
MMLR
Synonyms
  • C8
  • C8 COMPLEMENT, ANTIGEN, SERUM
  • C8 Level (C8L)
Laboratory
Sendout
Reference Laboratory
Mayo Wild 85 (ZW85) (National Jewish Health)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect blood in a lavender top tube from a fasting patient. Centrifuge, aliquot plasma into plastic vial and freeze immediately (within 1 hour).

Special Handling

Fasting specimen.

Lavender Top Tube
Normal Volume
1 mL EDTA plasma
Minimum Volume
0.5 mL EDTA plasma
Additional Information

The Complement, Total Hemolytic (CH50) assay 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. Test sent to Mayo Medical Laboratories; performed by National Jewish Health.

Billing
CPT Code
86160
Fee Code
32064
NY State Approved
No