What Is The Differences between J Tube and G Tube?

So, what is the main difference between G tube and J tube? The former is inserted into the stomach by a small cut in the abdomen while the latter is fixed to the middle part of a small intestine. The insertion location is what helps to tell the distinction. 

Adequate nutrients are essential for the growth and well-being of an individual. But there are instances where a person cannot take adequate nutrients through the mouth due to a problem with the gastrointestinal tract. This situation usually happens to babies. Insufficient nutrients in the body might result in stunted growth and malnourishment. Medical doctors usually employ either G-tube or J-tube. These instruments play an essential role in providing nutrients to the patient. 

Keep in mind that these gadgets are used when the oral intake is reduced or stopped. Transfering the food into the gastrointestinal tract becomes a problem. These types of feeding are only tolerable by the patients.  Both J-tube and G-tube are crucial instruments that facilitate the feeding program to the patient. These tubes help to supply nutrients to reach the bodies of individuals suffering from gastrointestinal tract problems. 

This article provides a comprehensive insight into the differences between J tube and G tube. Take the time to read through and informed about the functionalities of these feeding instruments. These quick tips can also help you handle your assignment and prepare for the exam with ease. 

Subscribe To My Channel, Please

Differences between J Tube and G Tube(With Table)

Basic Terms




A medical device inserted in the middle of the small intestines.

A medical device inserted in the stomach through a small abdominal cut.


Provide medication and nutritional needs.

Provide medication, nutrition, release stomach gases, and gastric drainage.

Placement Location

Can be placed endoscopically, laparoscopically, via gastric bypass procedure or Roux-en-Y.

Can be placed endoscopically and surgically. The surgical placement can be through a small incision with the help of a laparoscope, or through a larger cut.


Cannot be replaced at home.

Can be replaced at home.


Ideal for patients with chronic vomiting, low gastric motility, and high risk of aspiration.

Suitable for patients with swallowing difficulties as a result of stroke, esophageal atresia.


Feeding programs take about 16 to 20 hours. Hence considered to be slow

The feeding process is too fast since the stomach has expandable areas.


Stomach experience leaking around the tubes causing irritation.

This results in granulation tissue formation which is irritating, painful, and bleeding.

Stands for

Jejunostomy feeding tube.

Gastrostomy feeding tube.

What Is A J-Tube?

A Jejunostomy Tube, commonly referred to as a J-tube, is a medical device designed for enteral feeding, providing a direct route for delivering nutrition to the jejunum, the second part of the small intestine. This tube is typically used when feeding directly into the stomach is not feasible or well-tolerated by the patient.

The J-tube insertion procedure involves a surgical or endoscopic method to place the tube through the abdominal wall and into the jejunum. The distal end of the tube remains inside the intestine, allowing for the infusion of liquid nutrition or medications directly into the jejunum. This method is particularly beneficial for individuals who may experience complications such as reflux, gastroparesis, or other conditions that impede normal gastric function.

J-tubes are utilized in cases where gastric feeding is not advisable or when post-pyloric feeding is deemed more appropriate. They cater to patients who may have difficulties with stomach absorption or require nutritional support beyond the stomach. Common scenarios for J-tube use include patients with severe gastrointestinal disorders, neurological conditions, or those recovering from certain surgeries.

Regular care and maintenance are crucial for individuals with J-tubes to prevent infections and complications. Healthcare professionals provide guidance on proper feeding techniques, tube hygiene, and troubleshooting potential issues. The use of J-tubes is a valuable intervention in the medical field, ensuring that individuals who cannot meet their nutritional needs through oral intake receive the necessary sustenance to maintain their health and well-being.

What Is A G-Tube?

A Gastrostomy Tube, commonly known as a G-tube, is a medical device designed for enteral feeding, facilitating the direct delivery of nutrition into the stomach. This tube is employed when individuals are unable to consume food orally, either due to medical conditions, surgical interventions, or other factors that impede normal swallowing or digestion.

The insertion of a G-tube involves a medical procedure where the tube is surgically or endoscopically placed through the abdominal wall and into the stomach. The external end of the tube remains outside the body, allowing for the attachment of feeding solutions, medications, or other necessary substances.

G-tubes are particularly beneficial for individuals requiring long-term enteral nutrition, such as those with neurological disorders, certain gastrointestinal conditions, or those recovering from surgeries that affect normal feeding processes. They offer a reliable means of ensuring that essential nutrients reach the digestive system, supporting overall health and nutritional well-being.

Proper care and maintenance of the G-tube site are essential to prevent infections and complications. Healthcare professionals provide guidance on hygiene, feeding protocols, and addressing any issues that may arise during the use of the G-tube. The versatility of G-tubes makes them a valuable tool in medical care, providing a lifeline for individuals who cannot meet their nutritional needs through traditional oral intake.

Main Differences Between J Tube and G Tube 

  1. J tube is inserted in the middle of the small intestines while G tube in the stomach through a small abdominal cut.
  2. G tube is used for medication, nutrition, the release of stomach gases, and gastric drainage while the J tube specifically for medication and nutrition.
  3. J tubes are placed endoscopically and laparoscopically whereas G tube is placed endoscopically and surgically.
  4. G tube can easily be changed at home while J tube cannot be changed at home easily.
  5. Feeding the patient through the G tube is faster than the J tube since the stomach has expandable fundus and areas.
  6. J tube causes leakage around the tube which causes irritation and granulation issues while G tube results in the formation of granulation tissues which are painful, irritating, and experiences bleeding.

Similarities between J Tube and G Tube

  1. Both are useful for providing nutrition
  2. Both can be used for providing fluids
  3. Both are used for decompressing the stomach 
  4. Both are used for providing medication
  5. Both are used for removing stomach content 

Frequently Asked Questions

  • Do Meds Go in G or J tube?

Well, this depends on the type of medication being used. But most medication can go through either  G- or J-port. The medical will determine which medicine can go through either of the tubes. 

  • Are there Different Types of Feeding Tubes?

Yes. Some common types of feeding tubes are Nasogastric feeding tube (NG) Nasojejunal feeding tube (NJ) Gastrostomy tubes, e.g. percutaneous endoscopic gastrostomy (PEG), and radiologically inserted gastrostomy (RIG) Jejunostomy tubes

  • Why Would Someone Need a Jejunostomy?

It helps in bypassing the distal small bowel or large bowel due to a bowel leak or perforation.

  • How Long Does J tube Surgery Take?

The procedure takes about 30-45 minutes. It is an ideal procedure for patients with stomach discomfort. It creates a way where the air will slowly leave the stomach and the discomfort should go away.

  • Is a Jejunostomy Permanent?

No. It is semi-permanent access for the patient who has had difficulty with gastroparesis, nausea, vomiting, or previous intolerance to gastric feeding.

You May Also Like:


J-tubes (Jejunostomy tubes) and G-tubes (Gastrostomy tubes) are medical devices used for enteral feeding, providing nutrition directly to the digestive system when oral intake is not possible. Despite their shared purpose, there are notable differences between the two types of tubes.

A G-tube is inserted through the abdominal wall into the stomach, allowing for the direct delivery of nutrition into the gastric system. G-tubes are commonly used for long-term enteral feeding and are suitable for patients who can tolerate gastric feeding.

In contrast, a J-tube is inserted beyond the stomach, directly into the jejunum (the second part of the small intestine). This type of tube is employed when gastric feeding is not feasible or well-tolerated due to issues such as reflux or gastroparesis. J-tubes are particularly useful for patients who need post-pyloric feeding.

The key distinction lies in the placement and target location for nutrient delivery. G-tubes deliver nutrition to the stomach, while J-tubes provide direct access to the jejunum. The choice between the two depends on the patient’s specific medical condition, tolerance, and the need for post-pyloric feeding.

In summary, G-tubes and J-tubes serve the common purpose of enteral feeding but differ in their insertion sites—G-tubes go to the stomach, and J-tubes extend into the jejunum. The selection between these tubes is based on the patient’s medical requirements and the most effective route for providing essential nutrition.

More Sources and References

  1. Gastrostomy versus Gastrojejunostomy. NCBI

  2. Types of Feeding Tubes and Their Uses. Very Well Health 

Leave a Comment