Ordering Recommendation

Aids in diagnosis of hereditary angioedema and in monitoring response to therapy.

Mnemonic

C1ESTER

Methodology

Quantitative Turbidimetric

Performed

Sun-Sat

Reported

1-4 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Serum separator tube.

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Ambient. Grossly hemolyzed and/or lipemic specimens

Remarks
Stability

After separation from cells: Ambient: Unacceptable; Refrigerated: 14 days; Frozen: 1 month.

Reference Interval

Effective November 15, 2021
21-38 mg/dL

Interpretive Data



Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

86160

Components

Component Test Code* Component Chart Name LOINC
0050140 C-1-Esterase Inhibitor 4477-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • C1 esterase inhibitor
  • C1 Esterase Inhibitor Antigen, S
  • C1 Esterase Inhibitor Antigen, Serum
  • C1 Esterase Inhibitor Quantitative
  • C1 Inactivator, Quantitative
  • C1 Inhibitor
  • C1 Inhibitor Antigenic Protein
  • C1 inhibitor level
  • HAE
  • Hereditary Angioedema
C1-Esterase Inhibitor