Complement Activity Enzyme Immunoassay, Total
:0050198
Mnemonic: CH50
Methodology:
Enzyme-Linked Immunosorbent Assay
Performed:
Mon-Fri
Reported:
1-4 days
Specimen Required:
Collect: One 7 mL plain red. Allow to clot for one hour at room temperature.
Storage/Transport Temperature: 1 mL serum, frozen. (Min: 0.3 mL) Submit specimen in an ARUP Standard Transport Tube.
Remarks:CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP and freeze. Plasma is not recommended. Do not use separator tubes or gels.
Unacceptable Conditions: Specimens left to clot at 2-8°C. Specimens exposed to repeated freeze/thaw cycles. Separator tubes. Nonfrozen specimens.
Stability (collection to initiation of testing): After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
Reference Interval:
Low: 59 CAE Units or less Normal: 60-144 CAE Units High: 145 CAE Units or greater
CPT Code(s):
86162
Cross References:
CH100, CH50, Complement CH100, Total, Total Complement CH100, Total Complement CH50