C1 esterase inhibitor

Norm
8–4 mg/dl

Synonyms: C₁ esterase, C₁ inactivator, C₁ inhibitor, HANE test.
Serum
Red cap

The indicator is used to diagnose congenital angioedema edema. In patients with angioedema, the C₄ complement fraction decreases during attacks. Sometimes, the term “C₁ esterase” is mistakenly used when describing a C₁ esterase inhibitor.

Source | Handbook of Basic Laboratory Tests | Doctor of Medical Sciences Gintaras Zaleskis