A Gastrojejunostomy (GJ) Tube is similar to a standard G-tube, but it is longer. Instead of stopping in the stomach, the tube passes through the stomach and extends deeper into the small intestine (the jejunum).
About this scan
Common Indications for a GJ Tube
Your doctor may recommend a GJ tube instead of a G-tube if you:
- Have severe acid reflux or a high risk of inhaling (aspirating) stomach contents into your lungs.
- Suffer from gastroparesis, a condition where your stomach empties too slowly.
- Have a blockage in your stomach or the first part of your intestine.
Will it be painful?
With local numbing and conscious sedation, the procedure is not painful. You will likely feel pressure and a sensation of fullness in your stomach as the tube is guided into place.
Before your appointment
Do I need to prepare?
Yes, fasting for 8 hours is required. You may also be given a special liquid to drink the night before to help outline your digestive tract on the X-rays.
During the scan
What happens during the procedure?
The setup is nearly identical to a G-tube placement. However, once the needle reaches the stomach, the radiologist uses live X-ray video to expertly navigate a thin wire out of the bottom of the stomach and down into the small intestine. The soft feeding tube is then threaded over the wire, ensuring the nutrients bypass your stomach entirely.
How long does it take?
Because the tube must be carefully guided further into the digestive tract, this procedure takes slightly longer, usually 45 to 60 minutes.
Safety and special situations
What are the important limitations and safety checks?
Interventional radiology is minimally invasive, but it is not risk-free and is not automatically safer or more effective than surgery, endoscopy, medicines, or observation for every patient. Technical success does not always produce symptom relief or cure disease, and repeat treatment or another approach may be needed. Suitability depends on anatomy, disease severity, comorbidities, imaging, local expertise, and the alternatives available.
Risks vary by procedure and may include pain, bleeding, infection, contrast reaction, kidney injury, radiation exposure, vessel or organ injury, clotting, device movement or blockage, sedation complications, treatment failure, and an unplanned operation or admission. Tissue sampling can be nondiagnostic and requires pathology; tumor treatments require oncology follow-up. The consent discussion should cover the patient-specific benefits, material risks, alternatives, and what happens if the procedure cannot be completed.
Preparation is individualized. Give the team a complete list of anticoagulants, antiplatelet drugs, diabetes medicines, supplements, allergies, kidney problems, pregnancy possibility, and prior contrast reactions. Do not stop a blood thinner or diabetes medicine on your own: the procedural team and prescribing clinician must balance bleeding against thrombosis or metabolic risk and provide exact written instructions. Fasting, laboratory tests, antibiotics, sedation, escort, admission, and aftercare differ by procedure.
Sources and summary
Sources and further reading
Conclusion
A GJ tube can provide post-pyloric feeding for selected patients, but aspiration risk is reduced rather than eliminated. The jejunal limb commonly migrates or blocks and may need fluoroscopic exchange; leakage, infection, bowel injury, intussusception, and nutrition or medicine-delivery problems require a clear care plan.