Trans-gastric jejunal tube (G-J tube) factsheet


Children who continuously vomit or have severe reflux are at risk of inhaling their feeds. This is called aspirating. Aspirating can be life-threatening.

A trans-gastric jejunal tube, also known as a G-J tube, can be used to help your child get nutrition without the risk of aspirating.

 About the device

A G-J tube is a special tube, or button, with two connection ports:

  • one port leading into the stomach on the side of the button
  • one port leading into the small intestine on the top of the button

Some devices may also have a balloon inflation port.

The G-J tube is inserted through the opening in the skin where a gastrostomy button has been placed. It is inserted at the hospital in the radiology department via the existing gastrostomy site. A doctor will use an x-ray and a wire to guide the G-J tube into place.

Formula is given through the device slowly, using a pump, usually over 16 - 24 hours each day. Your dietician will discuss your child's feeding plan with you.

 Care of the device

Unlike a normal gastrostomy device, a G-J tube is never rotated. This is because turning the device will pull the tube out of it's position.

The G-J tube will need 10mL of water to be pushed through at least every 4 hours to reduce the risk of blockages. This is called flushing.

If the tube becomes blocked and is unable to be flushed, it will need to be removed and replaced at the hospital.

 When to seek help

Contact your child's treatment team immediately if:

  • your child starts to vomit the formula back up or gags
  • the G-J tube is accidently turned
  • G-J tube has been pulled out or has moved out of place
  • your child's stomach becomes swollen
  • the G-J tube or device leaks
  • your child experiences pain and discomfort.
Last updated Friday 15th December 2023


This factsheet is provided for general information only. It does not constitute health advice and should not be used to diagnose or treat any health condition.

Please consult with your doctor or other health professional to make sure this information is right for you and/or your child.

The Sydney Children’s Hospitals Network does not accept responsibility for inaccuracies or omissions, the interpretation of the information, or for success or appropriateness of any treatment described in the factsheet.

© Sydney Children’s Hospitals Network 2024