Pathology | Eastern Health

Test & Collection Guide

PLEASE NOTE: Recent changes have been made to this Test

Recent changes for C1 Esterase Inhibitor

Recent changes for C1 Esterase Inhibitor
Date	Field	Changed From	Changed To
8th October 2025	Collection & Request Instructions	Transport specimen at Room Temperature to lab Sample haemolysis may make this test unreportable	Transport ON ICE IMMEDIATELY to lab
	Collection & Request Instructions		Samples must be transported to the laboratory on ice and processed within 1 hour of collection.
	Processing Instructions	Spin, separate and freeze serum ASAP	Spin, separate and freeze serum ASAP. This must be done within 1 hour of collection.
	External Transport Instructions	Transport on ice.	Send to the referral laboratory on dry ice. Do not pack dry ice in a sealed container. Use appropriate PPE when handling dry ice.

C1 Esterase Inhibitor

Alternate names:

C1E Functional (C1EF); Complement Component, Functional Assay of C1 Esterase

Laboratory:

Referred Test

Test Code:

C1FUN

Specimen types:

Serum

Container types:

Serum tube with gel

Collection Instructions:

Transport ON ICE IMMEDIATELY to lab

Samples must be transported to the laboratory on ice and processed within 1 hour of collection.

Minimum Adult Volume:

2 mL

Paediatric Minimum Volume:

1 mL

Frequency:

Weekly

Result Turnaround Time:

7-10 days

Laboratory Use Only

Storage Instructions:

Spin, separate and freeze serum ASAP. This must be done within 1 hour of collection.

Transport Instructions:

Send to the referral laboratory on dry ice. Do not pack dry ice in a sealed container. Use appropriate PPE when handling dry ice.

External Laboratory:

St Vincents Hospital

External Laboratory details...