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
  • C7
  • C7 Complement, Functional
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.

Rejection Criteria
SST tube not acceptable.
Yellow Top Tube
Red Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.5 mL serum
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
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