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Test Code PROINSULIN (760) Proinsulin

Specimen Requirements

Patient Preparation
Overnight fasting is required

Preferred Specimen(s)
1 mL serum

SPECIMEN PROCESSING and HANDLING

Allow blood to fully clot (about 1/2 hour) at room temperature (20-25° C).
Centrifuge in a refrigerated centrifuge and separate serum immediately. Specimens collected in serum separator tubes (SST®s) should be removed from the gel after centrifugation.

TRANSPORT TEMPERATURE

Transport Temperature
Frozen
Specimen Stability
Serum:
Room temperature: 1 day
Refrigerated: 3 days
Frozen: 6 months
Plasma:
Room temperature: 5 days
Refrigerated: 5 days
Frozen: 4 weeks

PERFORMING LAB

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042