Gastrin is a gastrointestinal hormone that stimulates release of gastric acid, pepsin, and intrinsic factor. Gastrin concentrations are increased with pernicious anemia and dramatically increased with Zollinger-Ellison syndrome.
Specimen Requirements: 1 yellow-top SST tube (minimum: 0.5 mL of serum) drawn following an overnight (12-14 hour) fast.
Centrifuge SST soon after clotting. Separate serum and FREEZE immediately. Send specimen frozen in plastic vial.
NOTE: Red-top is also acceptable.
Analytical Time: 3 days
Days Set Up: Monday through Friday