Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

INTERFERON, GAMMA

General Information

Lab Order Codes:

IFNG

Synonyms:

Gamma Interferon, IFN Gamma

CPT Codes:

83520 - Immunoassay, analyte, quantitative; not otherwise specified

Test Includes:

N/A

Logistics

Test Indications:

N/A

Lab Testing Sections:

Chemistry - Sendouts

Referred to:

Fairview University Diagnostic Laboratories (Atlas Test: IFNG)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Monday - Friday

Turnaround Time:

5 days

Special Instructions:

Specimens must be sent to the laboratory immediately after collection for processing.

Specimen

Specimen Type:

Whole blood or CSF. Blood is the specimen of choice.

Container:

Blood: Red top (plain, no gel) tube
Alternate: Lavender top (EDTA) tube

CSF: Screw-capped, sterile vial

Draw Volume:

4 mL (Minimum: 3.6 mL) blood

2 mL (Minimum: 0.5 mL) CSF

Processed Volume:

2 mL (Minimum: 0.2 mL) serum

2 mL (Minimum: 0.2 mL) CSF

Collection:

Routine venipuncture or CSF collection.

Deliver to laboratory immediately

Special Processing:

Lab Staff:

Serum:
Allow samples to clot for 30 minutes before centrifugation. Centrifuge for 15 minutes at 1000-1500g(rcf) at room temperature. Remove serum. Aliquot into two vials with at least 500 uL per vial. Label appropriately and band together. Store samples at < or = -20C (-70C preferred). Ship frozen. Forward promptly.

Plasma:
Specimen must be processed immediately after collection. Centrifuge for 15 minutes at 1000-1500g(rcf) at room temperature. Remove plasma. Aliquot into two vials with at least 500 uL per vial. Label appropriately and band together. Store samples at < or = -20C (-70C preferred). Ship frozen. Forward promptly.

CSF:
Aliquot into two vials with at least 500 uL per vial. Label appropriately and band together. Store samples at < or = -20C (-70C preferred). Ship frozen. Forward promptly. Note: An MBAT must be ordered for CSF.

Patient Preparation:

None

Sample Rejection:

Gross hemolysis; stored at room temperature >2 hours

Interpretive

Reference Range:

≤3.0 pg/mL

Note: This range applies to blood/plasma levels only. There are no ranges available for CSF.

Critical Values:

N/A

Limitations:

N/A

Methodology:

Enzyme-linked immunosorbent assay

References:

Fairview University Diagnostic Laboratories Laboratory Web Page http://labguide.fairview.org/diagnostic.asp September 2013



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