Laboratory Test Information Guide

Details for C1 Inhibitor Protein, Serum/Plasma

Test Name: C1 Inhibitor Protein, Serum/Plasma
Alternate Name(s): C1 Esterase Inhibitor
C1 Inactivator
Laboratory: Clinical Immunology
Specimen Type: Adult:
5 mL Gold top Vacutainer tube

Pediatric:
0-2 years: 0.5 mL Red or Gold top Microtainer
2-10 years: 3 mL Red top Vacutainer tube

Light Green (Li-Heparin) or Lavender (EDTA) top tubes are also acceptable
Collection Information: Minimum volume of serum or plasma required is 360 L for adult samples or 200 L for pediatric samples.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Monday Friday
0800-1600
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
10 days
Stat
N/A
 
Reference Range: 0.21 - 0.38 g/L
Effective Date: 2010-03-12
Revised Date: 2020-05-25
Critical Value:  
Interpretive Comments: C1 inhibitor protein is decreased in hereditary angioneurotic edema, a genetic disease characterized by acute edema of subcutaneous tissue, the GI tract, or the upper respiratory tract.
Special Processing:  
Comments: This is a quantitative assay; it does not assess the function of C1 inhibitor.
Method of Analysis: Turbidimetry
Critical Information Required:  
Storage & Shipment: Store and ship serum or plasma refrigerated. Frozen serum or plasma is also acceptable.
System Codes: 
Cerner
C1IN
 
Referred To:  

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