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Item Value
Available Stat? No
Test code AH50A
Performed by ARUP
Sendout? Yes
Method Semi-Quantitative Radial Immunodiffusion
Container type Gold or Red-top tube
Amount to Collect 2 mL (blood)
Sample type SERUM
Preferred volume 1 mL (serum)
Min. Volume 0.3 mL (serum)
Processing notes Aliquot and freeze. Aliquot cannot be shared with other tests. Transport to CB frozen. Order ARUP test code 2005373.
Ref Lab Rejection Criteria Specimen types other than serum. Refrigerated or room temperature specimens. Specimens left to clot at refrigerated temperature. Specimens exposed to repeated freeze/thaw cycles.
Units percent normal
Normal range 59 percent normal or greater
Synonyms AH50, Alternate Pathway, Alternative Pathway, Functional Complement, Hemolytic Complement
Stability After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
Turn around times 7-14 days
Additional information This test is intended for screening of functional activity of the alternative pathway of the complement system. Abnormal test results can be due to hereditary absence or acquired functional defect in the activity of any of the individual components of the alternative pathway.
CPT coding 86162
LOINC code 13087-2
Last Updated 5/31/2017 2:37:27 PM
Entry Number 1789
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