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Lab Test Dictionary

C4 Function (C4F)

Methodology

Hemolytic Assay


Specimen Type

Serum

Performing Lab

National Jewish Complement


Epic ID

Other Reference Test

Lab Test Days

3rd Wednesday of the Month

Standard TAT

4 Weeks


Collection Information

Specimen Required

1-2 mL Blood

Container Type

Red Top (No Additive)


Processing Information - Lab Use Only

Transport Temperature

Frozen-Only

Specimen Stability

Room Temp=Unacceptable; Refrigerated=Unacceptable; Frozen=1 Year

Rejection Criteria

Thawed specimen; Serum separator tubes (SST)

Test Volume Required

1 mL Serum

Minimum Test Volume

0.25 mL Serum

Processing Instructions

Separate serum and freeze immediately. Complete a National Jewish Complement Lab requisition and submit with specimen frozen Monday-Friday, ok for Saturday delivery.


CPT Codes

86161