Gastrin
CPT4 code
Name of the Procedure:
Gastrin Test
Summary
A gastrin test measures the level of the hormone gastrin in your blood. Gastrin stimulates the release of stomach acid, which is necessary for proper digestion and absorption of nutrients.
Purpose
The gastrin test is used to diagnose conditions associated with abnormal levels of gastrin. Commonly, it helps identify Zollinger-Ellison syndrome (a condition characterized by tumors that cause excessive production of gastrin), gastrinomas, and other conditions related to abnormal stomach acid production.
Indications
- Symptoms of peptic ulcers that are persistent or recurrent.
- Chronic diarrhea and abdominal pain.
- Suspected Zollinger-Ellison syndrome.
- Unexplained stomach ulcers despite treatment.
- Elevated levels of stomach acid or a suspected gastrinoma.
Preparation
- Fasting for 8-12 hours prior to the test.
- Avoiding medications that affect stomach acid levels, upon your doctor's advice (e.g., antacids, proton pump inhibitors).
- Informing the doctor about all medications and supplements you are taking.
Procedure Description
- Blood Sample Collection: A healthcare professional will draw a blood sample from a vein in your arm using a needle.
- Analysis: The blood sample is sent to a laboratory to measure the gastrin level.
- Monitoring: In some cases, additional blood samples are taken after intravenous administration of secretin (a hormone) to stimulate gastrin secretion for more accurate results.
No special tools or technology beyond standard blood draw equipment is used. Anesthesia or sedation is not required for this simple blood test.
Duration
The blood draw itself typically takes a few minutes. Laboratory results might take a few days to be processed.
Setting
The procedure is typically performed in a hospital, outpatient clinic, or a diagnostic laboratory.
Personnel
- Phlebotomist or nurse who draws the blood sample.
- Laboratory technician who analyzes the blood sample.
- A physician who interprets the test results.
Risks and Complications
- Common Risks: Bruising or discomfort at the site where blood is drawn.
- Rare Risks: Infection, fainting, or hematoma (a collection of blood under the skin).
Benefits
- Accurate diagnosis of conditions affecting stomach acid production.
- Helps guide appropriate treatment plans for related diseases.
- Provides peace of mind by ruling out severe conditions when results are normal.
Recovery
- Minimal recovery time as it is a simple blood test.
- Patients can resume normal activities immediately.
- Follow-up appointments might be necessary based on the results and underlying conditions.
Alternatives
- Stomach pH monitoring: Tests the acidity level in the stomach.
- Endoscopy: Allows direct visualization of the stomach and duodenum.
- Imaging tests: Such as CT scans or MRIs, to identify tumors or abnormalities.
Each alternative has its own pros and cons, and the choice of procedure depends on the clinical picture and discussion with the healthcare provider.
Patient Experience
- During Procedure: Mild pain or discomfort when the needle is inserted.
- After Procedure: Possible bruising at the puncture site; minimal other discomfort.
- Pain management is generally not necessary beyond the mild, brief discomfort associated with the blood draw.