Home
HelpTest ID GAST Gastrin, Serum
Useful For
Investigation of patients with achlorhydria or pernicious anemia
Investigation of patients suspected of having Zollinger-Ellison syndrome
Â
Diagnosis of gastrinoma
Method Name
Automated Chemiluminescent Immunometric Assay
Reporting Name
Gastrin, SSpecimen Type
SerumSpecimen Required
Patient Preparation:
1. Fasting (8 hours) required
2. For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
3. For 1 week before specimen collection, if medically feasible, patient should not take proton pump inhibitors (omeprazole, lansoprazole, dexlansoprazole, esomeprazole, pantoprazole, and rabeprazole).
4. For at least 2 weeks before specimen collection, patient should not take or receive drugs that interfere with gastrointestinal motility (eg, opioids).
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. If multiple specimens are collected, submit each vial under a separate order.
2. Label specimens with corresponding collection time.
3. Centrifuge at within 2 hours of collection. Refrigerated centrifugation is preferred but not required. Immediately aliquot serum into plastic vial.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Frozen (preferred) | 30 days | |
| Refrigerated | 24 hours |
Reference Values
<100 pg/mL
There is no evidence that fasting serum gastrin levels differ between adults and children. Although 8-hour fasts are difficult or impossible to enforce in small children, serum gastrin levels after shorter fasting periods (3-8 hours) may be 50% to 60% higher than the 8-hour fasting value.
For International System of Units (SI) conversion for Reference Values, see www.mayocliniclabs.com/order-tests/si-unit-conversion.html.
Day(s) Performed
Monday through Saturday
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82941
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| GAST | Gastrin, S | 2333-3 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| GAST | Gastrin, S | 2333-3 |
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.Report Available
1 to 3 daysNY State Approved
YesForms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Oncology Test Request Form (T729)