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Test Code C1ESTER GR C1 Esterase Inhib Protein+Func

Important Note

Must be processed and frozen within 1 hour of collection.

Clinical System Name

C1 Esterase Inhib Protein+Func


C 1 Esterase Inhib Func - Quant
C 1 Esterase Inhibitor
C1 Esterase Inhibitor
C1 Esterase Inhibitor Function - Quant

Sample Requirements

Specimen: Whole blood

Container(s): Gold SST or Red or Gold Microtainer

Preferred Vol: 2.0 mL

Minimum Vol: 1.0 mL


Note: Send to the Lab STAT. Must be frozen within one hour of collection.Panel includes both "functional" and "protein."

Processing Instructions

Reject due to

Spin: Y

Aliquot: Y

Temp: -70 C

Storage location: Serum must be frozen within 1 hour of blood draw. Spin blood, freeze 1 mL serum in 2 plastic tube affixed with a large computer label. Freeze in the -70° C freezer send-outs rack.


Off-site collection: Spin, aliquot and freeze 1 mL serum within one hour of blood draw into two plastic aliquot containers. Transport frozen.


Specimen Type Temperature Time
  Room temp N
  Refrigerated N
  Frozen 2 w



STAT Performed TAT
N Collected daily; set up Th 3 - 14 d


Performing Laboratory

University of Washington

Dept of Laboratory Medicine

1959 NE Pacific St, NW220
Seattle, WA 98195

Phone Number: (206) 520-4600


Department:  Send Outs


Phone Number: (206) 987-2563



Reference Range

Protein Level   Functional
20 - 40 mG/dL Normal > 68%
  Equivocal 41 - 68 %
  Decreased < 40%



Method: ELISA

Analytical Volume: 0.3 mL serum in each aliquot


CPT Codes





Send Out Instructions


Reference Test Name: C1 Esterase Inhibitor Panel
Reference Test Number: C1EP
Instructions: Send out M - F with the UW courier.