Test Overview
C2H(50) Automated Liposome Lysis Assay
Investigating an undetectable total complement (CH50) level. Investigation of patients with acquired ongoing immune processes such as lupus erythematosus. Differentiation of congenital from acquired deficiencies.
25 - 47 unit/mL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
2 - 4 days
- Complement C2
- Second Component of Complement
Specimen Requirements
A fasting specimen is preferred but not required. Collect specimen in an SST (preferred) or red top tube. Immediately after drawing specimen, place the tube on wet ice and allow specimen to clot. Centrifuge at 4 degrees C, aliquot serum into a plastic vial and freeze within 30 minutes of collection. (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).
Place sample on wet ice following collection. Must arrive in lab or aliquot and freeze within 30 minutes of collection.
Additional Information
If C2 results are <15 U/mL, C3 (order code FC3, MML C3 8174), C4 (order code FC4, MML C4 8171) and C2 Antigen (order code C2AG, MML C2AG 84141) assays will be performed at an additional charge. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated. Test sent to Mayo Medical Laboratories.