ARUP's Laboratory Test Directory

C1-Esterase Inhibitor Functional : 0050141

Mnemonic: C1 INH F

Methodology: Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed: Sun, Wed, Fri
Reported: 1-4 days
Specimen Required: Collect: Serum separator tube, lavender (EDTA), or pink (K2EDTA).

Specimen Preparation: Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 0.5 mL serum or plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.1 mL)

Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions: Non-frozen specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks

Reference Interval:
68% or greater: Normal
41-67%: Indeterminate
40% or less: Abnormal
CPT Code(s): 86161
Cross References: C1 Inactivator (C1-Esterase Inhibitor Functional)