Referred Work

Preferred Sample Type

 Functional C1 esterase inhibitor

Suitable Specimen Types

  • Serum
5-10 mL

Specimen Transport

Sample sent frozen to referral Laboroatory

Sample Processing in Laboratory

Frozen if unable to deliver within one hour

Sample Preparation

Arrange for sample to be separated at an interim site and subsequently transport frozen to lab, if it cannot reach lab within one hour.

Turnaround Time

Up to 28 days

Sample Stability

Stored in laboratory at -20C

Functional C1 esterase inhibitor

General Information

Some indications: Hereditary Angioedema

Sample type is citrated plasma though plain serum can also be used.

Patient Preparation



None Given

Reference Range

expressed as a percentage of a control serum with 75% -125% being classed as normal.


  • EQA Scheme?: Yes
  • EQA Status:

    Referral Laboratory participates in UKNEQAS EQA scheme

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Protection of Personal Information – Laboratory Medicine comply with the Trust Data Protection Policy and have procedures in place to allow the Directorate and it’s employees to comply with the Data Protection Act 1998 and associated best practice and guidance.

The Trust Laboratories at Heartlands Hospital, Good Hope Hospital and Solihull Hospital were awarded UKAS (United Kingdom Accreditation Service) accreditation to the internationally recognised ISO 15189 standard in May 2015. For a list of accredited tests and other information please visit the test database
Tests not appearing on this scope are either under consideration or in the process of accreditation and so currently remain outside of our scope of accreditation. However, these tests have been validated to the same high standard as accredited tests and are performed by the same trained and competent staff.

For further information contact Louise Fallon, Quality Manager, 0121 424 1235