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Catalog ID C7FX C7 Complement, Functional, Serum

Important Note

CPOE TEST NAME:  Ref Misc Referral Lab Test

Test Name REF:  C7

This is not a screening test. Patients should have a low/undetectable CH50 level prior to ordering this test.

Reporting Name

C7 Complement, Functional, S

Useful For

Diagnosis of C7 deficiency

 

Investigation of a patient with an undetectable total complement (CH50) level

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red


Advisory Information


The total complement (CH50) assay (COM / Complement, Total, Serum) assay should be used as a screen for suspected complement deficiencies before ordering individual complement component assays. A deficiency of an individual component of the complement cascade will result in an undetectable total complement level.

Specimen Required


Patient Preparation: Fasting preferred

Supplies: Aliquot Tube, 5 mL (T465)

Collection Container/Tube: Red top

Submission Container/Tube: Plastic, 5 mL tube

Specimen Volume: 1 mL

Collection Instructions:

1. Immediately after specimen collection, place the tube on wet ice.

2. Centrifuge and separate serum from clot.

3. Immediately freeze specimen.


AUMC Laboratory Catalog Note:

Collect 2 mL blood in Red top tube and place on ice.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Frozen 14 days

Reference Values

36-60 U/mL

Day(s) and Time(s) Performed

Monday through Saturday; Continuous with a 3 p.m. cutoff

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

86161

LOINC Code Information

Test ID Test Order Name Order LOINC Value
C7FX C7 Complement, Functional, S 87724-1

 

Result ID Test Result Name Result LOINC Value
C7FX C7 Complement, Functional, S 87724-1

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Method Name

Automated Liposome Lysis Assay

Secondary ID

81064