Routine Fluoroscopic Upper GI Series with Water-Soluble Contrast, Oral
An X-ray study of the upper digestive tract performed after swallowing water-soluble contrast, which outlines the esophagus, stomach, and duodenum.
["This imaging test helps identify structural or functional problems in the esophagus, stomach, and upper small intestine."]
Key facts at a glance
- LOINC
- 42012-5
- Short code
- RF UGI Views W H2O soluble contr PO
- Synonyms
- RF UGI Views W H2O soluble contr PO
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- rf
- CPT
- 86430
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
This is a fluoroscopic X-ray examination of the upper gastrointestinal tract. You swallow a water-soluble contrast liquid, and a radiologist watches the contrast move through your esophagus, stomach, and duodenum while taking images.
Why might I need this test?
It may be ordered to investigate difficulty swallowing, persistent vomiting, upper abdominal pain, reflux symptoms, or suspected ulcers, narrowing, tumors, or problems with stomach emptying.
How is the test performed?
You drink a measured amount of contrast and then change positions as directed while X-ray images are recorded. The images show the shape and movement of the upper digestive tract. The examination usually takes less than an hour.
How do I prepare for the test?
Follow the preparation instructions provided by the imaging center, which may include fasting or limiting solid food and drinks beforehand. Tell the care team about contrast allergies, kidney disease, pregnancy or possible pregnancy, swallowing difficulties, and any prior reactions to contrast.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal findings may indicate reflux, ulcers, narrowing or strictures, hiatal hernia, tumors, or delayed movement of contrast through the stomach. Results are interpreted together with your symptoms, examination, and any other tests. Your radiologist will explain the findings and recommend follow-up if needed.
Short name
Upper GI series with oral water-soluble contrast
Frequently asked questions
Is this the same as a barium swallow?
Will I feel anything after drinking the contrast?
Can I return to my normal activities afterward?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy