Test Overview
Test Methodology

Automated Liposome Lysis Assay

Test Usage

Diagnosis of C7 deficiency; investigation of a patient with absent total complement (CH50) level.

Reference Range *

36 - 60 units/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday - Saturday
Analytic Time

2 - 4 days

Soft Order Code
C7
MiChart Code
C7 Complement, Functional
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo C7FX (81064)
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    A fasting specimen is preferred but not required. Collect blood in a red top tube; do not use SST tube. Immediately place on wet ice. Centrifuge, aliquot serum into a plastic vial and freeze immediately. Hemolytic or thawed specimens are unacceptable.

    Special Handling

    Place specimen on wet ice immediately following collection. Must arrive in lab or aliquot and freeze within 2 hours.

    Normal Volume
    1 mL serum
    Minimum Volume
    0.5 mL serum
    Rejection Criteria
    SST tube not acceptable.
    Additional Information

    The Complement, Total Hemolytic (CH50) 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. Test sent to Mayo Medical Laboratories.

    Billing
    CPT Code
    86161
    Fee Code
    38142
    LOINC
    26996-9
    NY State Approved
    No