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Test Code C4 C4 Complement

EHR Test Codes

  Test Code Test Name
Atlas C4 C4 Complement
Cerner   C4 Complement

 

Specimen Requirements

Preparation of Patient: 

None

 

Container Type: 

Gold Top SST Gel & Clot Activator Tube

Specimen Type:

Serum

 

Specimen Volume: 

2.5 mL of Serum minimum 0.3 mL

 

Specimen Handling/Transport:

Separate serum from cells within 2 hours of collection.

Transport refrigerated 2-8°C.

 

Specimen Stability/Storage:

4 hours ambient room temperature

5 days refrigerated 2-8°C

 

Specimen Rejection:

Gross Hemoloysis

Gross Lipemia

Performing Laboratory

Munson Medical Center Laboratories

Chemistry Department

Priority, Frequency, & Turnaround

Priority:

Non-Emergent

 

Frequency:

24 hours 7 days a week

 

Turnaround:

0 - 1 days

Methodology

Immunoturbidimetric

Reporting

Reference Range: 

19 - 52 mg/dL

 

Critical Decision: 

None

Clinical Significance

The Complement system is composed of a series of circulating blood proteins that serve as mediators of the inflammatory response. C4 is utilized only by the classical complement pathway, so that it is decreased only when this pathway is activated. In diseases activating the alternate pathway alone, C4 levels will be normal.1 Measurements of this protein aids in the diagnosis of immunologic disorders, especially those associated with deficiencies of complement components.

CPT Code

86160

 

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