Patient should fast 12 hours.
Draw blood in a SST. Spin, separate and send 2.0mL serum in screw-capped plastc vial; label transport tube as “serum” and freeze.
Contact lab for dry ice for shipment.
Frozen 14 days
Diagnose Zollinger-Ellison syndrome and pernicious anemia, both of which exhibit high gastrin levels. Evaluate patients with severe duodenal ulcer or recurrent symptoms after gastric surgery; evaluate achlorhydria.