Printable Test Catalog - OU Medicine

TEST AVAILABILITY: Daily
METHODOLOGY: Semi-Quantitative Immunofixation electrophoresis
(IFE)
CPT: 86160
[COMPC4] Complement C4
SPECIMEN REQUIRED: Refrigerated serum or plasma
TUBE OR CONTAINER: Gold or Light Green (Heparin)
SPECIAL HANDLING: Collection of specimen from a fasting
patient is recommended
SPECIMEN VOLUME: 1 mL
MINIMUM VOLUME: 0.5 mL
TEST AVAILABILITY: Daily
TURNAROUND TIME: 1-2 days
REFERENCE RANGE: 15-38 mg/dL
OTHER NAMES: C4
METHODOLOGY: Turbidimetric
CLINICAL USE: Detect individuals with inborn deficiency of this
factor or those with immunologic disease in whom
hypercatabolism of complement causes reduced
levels; these diseases include lupus
erythematosus, serum sickness, certain
glomerulonephritides, chronic active hepatitis,
and others
CPT: 86160
[COMPC4BP] Complement C4 Binding Protein
SPECIMEN REQUIRED: Frozen plasma
TUBE OR CONTAINER: Blue (Na citrate)
SPECIMEN VOLUME: 1 full tube
Testing volume: 1 mL of PLASMA
MINIMUM VOLUME: 1 full tube
Testing volume: 0.5 mL of PLASMA
TEST AVAILABILITY: Daily
TURNAROUND TIME: 2-8 days
REFERENCE RANGE: 50-130%
METHODOLOGY: Enzyme-linked immunosorbent assay (ELISA)
CLINICAL USE: Confirmation and characterization of protein S
deficiency
CPT: 83520
[COMPC4D] Complement C4d Fragment
SPECIMEN REQUIRED: Frozen plasma
TUBE OR CONTAINER: Lavender (EDTA)
SPECIAL HANDLING: Plasma must be separated from cells w/in
45 minutes of venipuncture. If more than one
hour is expected to pass between draw time
and separation, place tube in wet ice and
centrifuge cold.