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Test Code LAB2862 C1q Level

Important Note

Specimen must be received by the Main Lab within 30 minutes of collection.


CPA: Separate plasma from cells and freeze within ONE hour of collection.

Additional Codes

C1q Level

Clinical System Name

C1q Level


Acquired Angioedema

Radial Immuno Assay


C1q Non-Binding

Hereditary Angioedema


C1q Antigen


Sample Requirements

Specimen: Whole Blood

Container(s): Lavender/EDTA

Preferred Vol: 2.0 mL

Minimum Vol: 0.5 mL


Note: Send to Main Lab ASAP for processing. Plasma must be separated from cells and frozen within ONE hour of collection.

Processing Instructions

Reject due to: Plasma not separated within one hour of collection. Thawed specimen.

Spin: Y

Aliquot: Y

Temp: -70 C

Storage Location: CRITICAL FROZEN. Spin blood immediately, transfer 1.0 mL plasma (Min. 0.25 mL) to a plastic aliquot tube affixed with large Epic label. Deliver specimen to the CPA -70 freezer, Send Outs rack. Plasma should be frozen within ONE hour of blood draw.


Off-Site Collection: Spin blood immediately, transfer 1.0 mL plasma (Min. 0.25 mL) to a plastic tube affixed with large Epic label. Plasma should be frozen at -70 C within ONE hour of blood draw.


Specimen Type Temperature Time
Plasma Room Temp Unacceptable
  Refrigerated Unacceptable
  Frozen    1 yr



STAT Performed TAT
N Varies 4 - 5 w


Performing Laboratory

National Jewish Health

Complement Laboratory

1400 Jackson Street, Room D411

Denver, CO 80206


Phone Number: (800) 550-6227


Department: Send Outs

Phone Number: (206) 987-2563

CPT Codes



Method: Radial Immunodiffusion (RID)

Analytical Volume: 0.25 mL Plasma


Reference Range

83-125 mcg/mL

Send Out Instructions

Reference Test Name: C1q Level
Reference Lab Test Code: C1QL
Instructions: Send out Monday through Thursday via FedEx Priority Overnight. Saturday deliveries are not accepted.