Vial

INDIVIDUAL TEST 925

C1 INH Level

Indication

Suspicion of of angioedema

Sample material

EDTA-plasma

  • Minim. volume: 0,5 mL

Transport

  • Within Sweden: frozen
  • International: frozen

Method

Nephelometry

Reference interval

0.16-0.36 g/L

Result

The result is reported as normal, low, or elevated with a concentration (g/L).

Interpretation

Elevated concentration of C1-inhibitor can be seen in hereditary angioedema (HAE) type 2. Further test of C1-inhibitor function is recommended if HAE type 2 is suspected.

Low levels of C1-inhibitor may indicate hereditary angioedema (HAE) type 1 or consumption of C1-inhibitor (may be seen in some malignancies). The result should primarily be verified with a new sample as well as to include analysis of the concentration of C4.

A test of C1-inhibitor function is recommended if hereditary angioedema (HAE) type 2 is suspected after normal C1 levels.

References

  • Maurer M et al. World Allergy Organ J. 2022. The international WAO/EAACI guideline for the management of hereditary angioedema - The 2021 revision and update. PMID: 35497649

Last updated: 2025-12-05

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Vial

ENSKILD ANALYS 925

C1-INH nivå

Indikation

Misstanke om angioödem

Provmaterial

EDTA-plasma

  • Minim. volym: 0,5 mL

Transport

  • Inom Sverige: fryst
  • Internationellt: fryst

Metod

Nefelometri

Referensintervall

0.16-0.36 g/L

Resultat

Resultat anges som normalt, sänkt eller förhöjt med koncentration (g/L).

Tolkning

Förhöjd koncentration av C1-inhibitor kan ses vid hereditärt angioödem (HAE) typ 2. Komplettering med test av C1-inhibitorfunktion rekommenderas om misstanke på HAE typ2 finns.

Sänkt nivå kan tyda på hereditärt angioödem (HAE) typ 1 eller konsumtion av C1-inhibitor (kan ses vid vissa maligniteter). Resultatet bör i första hand verifieras med nytt prov för verifiering och även inkludera analys av koncentration av C4.

Om misstanke om hereditärt angioödem (HAE) typ 2 kvarstår vid normal C1-nivå rekommenderas komplettering med test av C1-inhibitorfunktion.

Referenser

  • Maurer M et al. World Allergy Organ J. 2022. The international WAO/EAACI guideline for the management of hereditary angioedema - The 2021 revision and update. PMID: 35497649

Senast uppdaterat: 2025-12-05

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