0.5 mL serum in red top or spun serum separator tube.
Test Description
Used to evaluate for the presence of an insulinoma.
Interferences: Marked hemolysis and lipemia.
Note: Generally used to evaluate for the presence of an insulinoma. Concurrent blood glucose concentration should be below 60 mg/dl (3.3 mmol/L) when serum insulin levels are measured. Not to be used on patients receiving exogenous insulin without an appropriate withdrawal period.