How to Check G Tube Placement: Tips for Safe Feeding

G-tubes, or gastrostomy tubes, are used to provide feeding and nutrition to patients that are unable to take food through their mouth. The placement of the G-tube is critical to ensure that the patient is receiving nutrition directly into their stomach. Checking the tube placement is a vital step in the feeding process, as it prevents the delivery of feeds into the lungs, which can be fatal. In this article, we will discuss the tips for safe G-tube feeding and how to check the G-tube placement to ensure the safety of the patient.

What is a G-Tube?

A gastrostomy tube (G-tube) is a medical device that is inserted through the abdominal wall directly into the stomach. It is used to provide nutrition to a person who is unable to eat food through their mouth or swallow liquids. G-tubes are used in patients with different medical conditions, including cerebral palsy, stroke, gastrointestinal disorders, and cancer. A G-tube allows the patient to receive the necessary nutrition directly into their stomach from a feeding bag or pump.

Why is G-Tube Placement Important?

The placement of a G-tube is crucial to ensure that the patient is receiving the nutrition they need. The G-tube must be placed accurately to avoid a misdirected tube, which can cause significant complications. The tube must enter directly into the stomach, and not into the lungs, to avoid aspiration pneumonia or other complications. Therefore, checking the G-tube placement is critical to ensure the safety of the patient.

How to Check G-Tube Placement Safely?

Checking the placement of a G-tube is a vital step before feeding the patient. The following are tips to help you check G-tube placement safely:

1. Wash Your Hands

Before starting any G-tube procedure, it’s important to wash your hands thoroughly. This is necessary to reduce the risk of bacteria and contamination.

2. Assemble Your Equipment

You will need a 10 ml syringe filled with air, stethoscope, and gloves. You may also need a pH strip if you are using a pH method to check the placement of the G-tube. Ensure that all equipment is clean and sterile before use.

3. Position Your Patient

Position your patient in a comfortable position, either sitting or lying down. Ensure that the patient is relaxed and calm before performing the procedure.

4. Locate the G-Tube Site

Locate the G-tube site, which can be identified as a small bump or button-like protrusion. Check the skin around the site and ensure there is no redness, swelling, or other signs of infection.

5. Assess Residual Volume

Assess the amount of gastric residual volume in the feeding tube by inserting a syringe into the port of the tube and pulling back the plunger. If there is any food in the syringe, it signals that the tube is in the right position. If you do not get any gastric fluid, it could be possible that the tube is either clogged or in a wrong position.

6. Check the Tube Length

Check the length of the G-tube by externally measuring it. If the length of the tube has changed from the previous measurement, it could indicate that the tube has migrated, and its placement needs to be checked.

7. Use pH Method

If you have a pH strip, insert it into the feeding tube and pull out a few drops of gastric contents. The pH should be acidic, between 1 to 5, which indicates that it’s in the stomach. An alkaline pH indicates the tube’s position in the duodenum, while a neutral pH indicates that the tube has possibly entered the lungs.

8. Use Auscultation Method

Using a stethoscope, place it on the patient’s abdomen, and listen for gurgling or swooshing sounds as air is injected into the G-tube. If you hear the sound of air in the stomach, the tube is in the right position. If there is no sound or if you hear respiratory sounds, it’s possible that the tube has entered the lungs.

Tips for Safe G-Tube Feeding

1. Use Sterile Procedure

Always use a sterile procedure when handling the G-tube, feeding bag or pump, and any equipment used. This will prevent any contamination and reduce the risk of infection.

2. Check the Feeding Formula

Ensure that the feeding formula has the appropriate nutrient content for the patient’s age, weight, and medical condition. Check the expiration date, and do not use any formula beyond the expiry date.

3. Administer the Feeding Slowly

Start the feeding slowly and gradually increase the rate over time. Begin by allowing the patient to be fed only a small amount and then increase the amount gradually, following the doctor’s instructions.

4. Monitor the Patient

Always monitor the patient’s reaction to feeding, such as nausea, vomiting, abdominal pain, distention, diarrhea, or constipation. If the patient experiences any adverse reactions, stop the feeding and notify the doctor immediately.

5. Clean the G-Tube Site

Clean the G-tube site daily with soap and water or as instructed by the doctor. Change the dressing as needed or if it becomes soiled or wet. Ensure that the site is dry before reapplying the dressing.

In Conclusion

Checking the placement of a G-tube is vital to ensure the safety of the patient during feeding. By following these tips, you can safely check the G-tube placement before feeding the patient. Always monitor the patient closely and report any adverse reactions to the doctor immediately.

Common Questions and Answers related to G-Tube Placement

  • What should I do if the tube is displaced?

    • If the tube is displaced, remove the feeding, and reposition the tube. Do not feed the patient through the displaced tube as it can lead to complications.
  • What should I do if the tube is clogged?

    • If the tube is clogged, try flushing it with warm water or use a declogging agent recommended by the manufacturer. Do not use sharp objects to try and unclog the tube as it can damage the tube or cause injury to the patient.
  • Can I give medication through a G-tube?

    • Yes, you can give medication through a G-tube if instructed by the doctor. Crush the medication and dissolve it in water before administering it through the tube. Always flush the tube with water after medication administration.


Jeejeebhoy, K. N., & Vadamalayan, B. (2009). Percutaneous endoscopic gastrostomy: techniques and indications. Expert review of gastroenterology & hepatology, 3(1), 87-93.

Tan, X., & Ngim, C. F. (2020). Gastrostomy Tubes. In Handbook of Nutrition and Diet in Palliative Care (pp. 97-113). Springer, Cham.

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