41400:GASTRIN
Author PeaceHealth Laboratories
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| Methodology: |
Chemiluminescent Immunoassay (CLIA) |
| Edit Date: |
4/18/2010 |
| Performed: |
Daily |
| Released: |
Same day as tested |
| CPT Code: |
82941 |
| Specimen Collection Details |
| Collection: |
One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube. Patient must be fasting for 10 hours or longer for basal serum gastrin levels. |
| Handling: |
Allow to clot, centrifuge and separate serum from cells within one hour. Freeze immediately. Allow no more than one freeze/thaw cycle. If multiple tests are ordered, send a separate specimen for this test. |
| Stability: |
4 hours refrigerated at 2-8° C or 30 days frozen at -20° C. |
| Standard Volume: |
1 mL serum. |
| Minimum Volume: |
0.5 mL serum. |
| Transport: |
Frozen on dry ice. |
| Comments: |
Measurement of the major forms of gastrin or immunoreactive gastrin in serum is the definitive test for the diagnosis of gastrinoma in patients with gastric acid hypersecretion. |
| Rejection Criteria: |
Hemolysis; lipemia; specimen which has been frozen and thawed more than once. |