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