Patient must fast 12-15 hours before collection.
Draw blood in a SST/1.0 mL serum. Spin, separate serum from cells within 2 hours and send refrigerated.
Room Temperature Unacceptable, Refrigerated 7 days Frozen 3 months
3-7 days Performed Tues, Thurs
To aid in the diagnosis of pancreatic beta cell dysfunction and proinsulinomas. Increased in IDDM and may also be increased in NIDDM patients. Levels are elevated in older patients, pregnant or obese diabetics, patients with functional hypoglycemia, insulinoma and hyperproinsulinoma.