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Laboratory Medicine

Test catalogue

Immunoglobulin G Subclasses

Test Name

Immunoglobulin G Subclasses (IgG Subclass, IgG4)

Gold Tube Specimen Type / Requirements

Container Type = 1 Gold Top (SST)

Minimum Volume = 2 ml serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Serum collected with or without gel separator. Write your initials, date and time of collection on the collection label.

Special Instructions Separate from cells within 2 hours of collection. Store and send frozen. Indicate date of birth and gender. The report will not include reference ranges when age and gender are not provided. Assay includes IgG1, IgG2, IgG3, IgG4

Rejection Criteria: Multiple freeze/thaw unacceptable, grossly hemolyzed, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Stability: Stable refrigerated 8 days. Avoid repeated freezing and thawing.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

5 Days

Test Utilization


Reference Value

See Reference Values Here

Test Code




Testing Location

Referred Out – ON, Canada (ROICL02)

Other Information