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Factor H Level

B-1H, Radial Immuno Assay, RIA

Test Codes

NJH: FHL, Order as a Miscellaneous Send Out.

Department

Send Outs

Specimen Collection Criteria

Collect: One Lavender-top EDTA tube.

Critical frozen. Send specimen for processing immediately after collection.

Physician Office/Draw Specimen Preparation

Critical frozen. Centrifuge to separate plasma from cells within 30 minutes of collection. Transfer plasma to a plastic transport tube and freeze (-20°C/-4°F or below) immediately.

Preparation for Courier Transport

Transport: 1.0 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 0.25 mL)

Rejection Criteria

• Serum specimens.
• Specimens not collected and processed as indicated.

In-Lab Processing

Critical frozen. Centrifuge to separate plasma from cells within 30 minutes of collection. Transfer plasma to a plastic transport tube and freeze (-20°C/-4°F or below) immediately.

Transport: 1.0 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 0.25 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): 1 year

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to National Jewish Health, Denver, CO.

Performed

Varies.
Results available in 30 days.

Reference Range

160 - 412 mcg/mL.

Test Methodology

Radial Immunodiffusion (RID).

Interpretation

By report.

CPT Codes

86160

Contacts

Last Updated

9/11/2023