Complement Component 4A


Sunquest Code:COMP4A  
Epic Code:LAB6697Epic Name:Complement Component Level 4A
Synonyms:C4a; C4A
Methodology:Radioimmunoassay
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported within 18 days.


Collection Instructions

Specimen:Blood
Optimal Volume:2 mL
Minimum\Peds Volume:1.2 mL
Container:Purple (EDTA)
Causes for Rejection:Room temperature or refrigerated specimens.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot within 1 hour of collection, 1 mL, 0.5 mL minimum. Freeze at -70° C or on dry ice immediately. CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Shipping Instructions:Ship on dry ice.
Stability:Stable for 1 year if stored at -70°C.
Test Performed at or Referral Lab Lab Sendouts  (National Jewish Health)
Referral Lab number:C4AR


Interpretive

Reference Range:0-2830 ng/mL
Use:Follow-up test for complement activity screening when CH50 is low or absent and AH50 is normal an high suspicion remains for complement deficiency.


Click HERE to Report test errors or omissions.
*If no email program is associated with this computer, please contact:
systemlabguide@fairview.org for TestID: 5469"